# -*- coding: utf-8 -*-
# Part of Odoo. See LICENSE file for full copyright and licensing details.

from datetime import datetime, timedelta
from functools import partial
from itertools import groupby

from odoo import api, fields, models, SUPERUSER_ID, _
from odoo.exceptions import AccessError, UserError, ValidationError
from odoo.tools.misc import formatLang, get_lang
from odoo.osv import expression
from odoo.tools import float_is_zero, float_compare



from werkzeug.urls import url_encode


class SaleOrder(models.Model):
    _name = "sale.order"
    _inherit = ['portal.mixin', 'mail.thread', 'mail.activity.mixin', 'utm.mixin']
    _description = "Sales Order"
    _order = 'date_order desc, id desc'
    _check_company_auto = True

    def _default_validity_date(self):
        if self.env['ir.config_parameter'].sudo().get_param('sale.use_quotation_validity_days'):
            days = self.env.company.quotation_validity_days
            if days > 0:
                return fields.Date.to_string(datetime.now() + timedelta(days))
        return False

    def _get_default_require_signature(self):
        return self.env.company.portal_confirmation_sign

    def _get_default_require_payment(self):
        return self.env.company.portal_confirmation_pay

    @api.depends('order_line.price_total')
    def _amount_all(self):
        """
        Compute the total amounts of the SO.
        """
        for order in self:
            amount_untaxed = amount_tax = 0.0
            for line in order.order_line:
                amount_untaxed += line.price_subtotal
                amount_tax += line.price_tax
            order.update({
                'amount_untaxed': amount_untaxed,
                'amount_tax': amount_tax,
                'amount_total': amount_untaxed + amount_tax,
            })

    @api.depends('order_line.invoice_lines')
    def _get_invoiced(self):
        # The invoice_ids are obtained thanks to the invoice lines of the SO
        # lines, and we also search for possible refunds created directly from
        # existing invoices. This is necessary since such a refund is not
        # directly linked to the SO.
        for order in self:
            invoices = order.order_line.invoice_lines.move_id.filtered(lambda r: r.type in ('out_invoice', 'out_refund'))
            order.invoice_ids = invoices
            order.invoice_count = len(invoices)

    @api.depends('state', 'order_line.invoice_status')
    def _get_invoice_status(self):
        """
        Compute the invoice status of a SO. Possible statuses:
        - no: if the SO is not in status 'sale' or 'done', we consider that there is nothing to
          invoice. This is also the default value if the conditions of no other status is met.
        - to invoice: if any SO line is 'to invoice', the whole SO is 'to invoice'
        - invoiced: if all SO lines are invoiced, the SO is invoiced.
        - upselling: if all SO lines are invoiced or upselling, the status is upselling.
        """
        unconfirmed_orders = self.filtered(lambda so: so.state not in ['sale', 'done'])
        unconfirmed_orders.invoice_status = 'no'
        confirmed_orders = self - unconfirmed_orders
        if not confirmed_orders:
            return
        line_invoice_status_all = [
            (d['order_id'][0], d['invoice_status'])
            for d in self.env['sale.order.line'].read_group([
                    ('order_id', 'in', confirmed_orders.ids),
                    ('is_downpayment', '=', False),
                    ('display_type', '=', False),
                ],
                ['order_id', 'invoice_status'],
                ['order_id', 'invoice_status'], lazy=False)]
        for order in confirmed_orders:
            line_invoice_status = [d[1] for d in line_invoice_status_all if d[0] == order.id]
            if order.state not in ('sale', 'done'):
                order.invoice_status = 'no'
            elif any(invoice_status == 'to invoice' for invoice_status in line_invoice_status):
                order.invoice_status = 'to invoice'
            elif line_invoice_status and all(invoice_status == 'invoiced' for invoice_status in line_invoice_status):
                order.invoice_status = 'invoiced'
            elif line_invoice_status and all(invoice_status in ('invoiced', 'upselling') for invoice_status in line_invoice_status):
                order.invoice_status = 'upselling'
            else:
                order.invoice_status = 'no'

    @api.model
    def get_empty_list_help(self, help):
        self = self.with_context(
            empty_list_help_document_name=_("sale order"),
        )
        return super(SaleOrder, self).get_empty_list_help(help)

    @api.model
    def _default_note(self):
        return self.env['ir.config_parameter'].sudo().get_param('account.use_invoice_terms') and self.env.company.invoice_terms or ''

    @api.model
    def _get_default_team(self):
        return self.env['crm.team']._get_default_team_id()

    @api.onchange('fiscal_position_id')
    def _compute_tax_id(self):
        """
        Trigger the recompute of the taxes if the fiscal position is changed on the SO.
        """
        for order in self:
            order.order_line._compute_tax_id()

    def _search_invoice_ids(self, operator, value):
        if operator == 'in' and value:
            self.env.cr.execute("""
                SELECT array_agg(so.id)
                    FROM sale_order so
                    JOIN sale_order_line sol ON sol.order_id = so.id
                    JOIN sale_order_line_invoice_rel soli_rel ON soli_rel.order_line_id = sol.id
                    JOIN account_move_line aml ON aml.id = soli_rel.invoice_line_id
                    JOIN account_move am ON am.id = aml.move_id
                WHERE
                    am.type in ('out_invoice', 'out_refund') AND
                    am.id = ANY(%s)
            """, (list(value),))
            so_ids = self.env.cr.fetchone()[0] or []
            return [('id', 'in', so_ids)]
        return ['&', ('order_line.invoice_lines.move_id.type', 'in', ('out_invoice', 'out_refund')), ('order_line.invoice_lines.move_id', operator, value)]

    name = fields.Char(string='Order Reference', required=True, copy=False, readonly=True, states={'draft': [('readonly', False)]}, index=True, default=lambda self: _('New'))
    origin = fields.Char(string='Source Document', help="Reference of the document that generated this sales order request.")
    client_order_ref = fields.Char(string='Customer Reference', copy=False)
    reference = fields.Char(string='Payment Ref.', copy=False,
        help='The payment communication of this sale order.')
    state = fields.Selection([
        ('draft', 'Quotation'),
        ('sent', 'Quotation Sent'),
        ('sale', 'Sales Order'),
        ('done', 'Locked'),
        ('cancel', 'Cancelled'),
        ], string='Status', readonly=True, copy=False, index=True, tracking=3, default='draft')
    date_order = fields.Datetime(string='Order Date', required=True, readonly=True, index=True, states={'draft': [('readonly', False)], 'sent': [('readonly', False)]}, copy=False, default=fields.Datetime.now, help="Creation date of draft/sent orders,\nConfirmation date of confirmed orders.")
    validity_date = fields.Date(string='Expiration', readonly=True, copy=False, states={'draft': [('readonly', False)], 'sent': [('readonly', False)]},
                                default=_default_validity_date)
    is_expired = fields.Boolean(compute='_compute_is_expired', string="Is expired")
    require_signature = fields.Boolean('Online Signature', default=_get_default_require_signature, readonly=True,
        states={'draft': [('readonly', False)], 'sent': [('readonly', False)]},
        help='Request a online signature to the customer in order to confirm orders automatically.')
    require_payment = fields.Boolean('Online Payment', default=_get_default_require_payment, readonly=True,
        states={'draft': [('readonly', False)], 'sent': [('readonly', False)]},
        help='Request an online payment to the customer in order to confirm orders automatically.')
    remaining_validity_days = fields.Integer(compute='_compute_remaining_validity_days', string="Remaining Days Before Expiration")
    create_date = fields.Datetime(string='Creation Date', readonly=True, index=True, help="Date on which sales order is created.")

    user_id = fields.Many2one(
        'res.users', string='Salesperson', index=True, tracking=2, default=lambda self: self.env.user,
        domain=lambda self: [('groups_id', 'in', self.env.ref('sales_team.group_sale_salesman').id)])
    partner_id = fields.Many2one(
        'res.partner', string='Customer', readonly=True,
        states={'draft': [('readonly', False)], 'sent': [('readonly', False)]},
        required=True, change_default=True, index=True, tracking=1,
        domain="['|', ('company_id', '=', False), ('company_id', '=', company_id)]",)
    partner_invoice_id = fields.Many2one(
        'res.partner', string='Invoice Address',
        readonly=True, required=True,
        states={'draft': [('readonly', False)], 'sent': [('readonly', False)], 'sale': [('readonly', False)]},
        domain="['|', ('company_id', '=', False), ('company_id', '=', company_id)]",)
    partner_shipping_id = fields.Many2one(
        'res.partner', string='Delivery Address', readonly=True, required=True,
        states={'draft': [('readonly', False)], 'sent': [('readonly', False)], 'sale': [('readonly', False)]},
        domain="['|', ('company_id', '=', False), ('company_id', '=', company_id)]",)

    pricelist_id = fields.Many2one(
        'product.pricelist', string='Pricelist', check_company=True,  # Unrequired company
        required=True, readonly=True, states={'draft': [('readonly', False)], 'sent': [('readonly', False)]},
        domain="['|', ('company_id', '=', False), ('company_id', '=', company_id)]",
        help="If you change the pricelist, only newly added lines will be affected.")
    currency_id = fields.Many2one("res.currency", related='pricelist_id.currency_id', string="Currency", readonly=True, required=True)
    analytic_account_id = fields.Many2one(
        'account.analytic.account', 'Analytic Account',
        readonly=True, copy=False, check_company=True,  # Unrequired company
        states={'draft': [('readonly', False)], 'sent': [('readonly', False)]},
        domain="['|', ('company_id', '=', False), ('company_id', '=', company_id)]",
        help="The analytic account related to a sales order.")

    order_line = fields.One2many('sale.order.line', 'order_id', string='Order Lines', states={'cancel': [('readonly', True)], 'done': [('readonly', True)]}, copy=True, auto_join=True)

    invoice_count = fields.Integer(string='Invoice Count', compute='_get_invoiced', readonly=True)
    invoice_ids = fields.Many2many("account.move", string='Invoices', compute="_get_invoiced", readonly=True, copy=False, search="_search_invoice_ids")
    invoice_status = fields.Selection([
        ('upselling', 'Upselling Opportunity'),
        ('invoiced', 'Fully Invoiced'),
        ('to invoice', 'To Invoice'),
        ('no', 'Nothing to Invoice')
        ], string='Invoice Status', compute='_get_invoice_status', store=True, readonly=True)

    note = fields.Text('Terms and conditions', default=_default_note)

    amount_untaxed = fields.Monetary(string='Untaxed Amount', store=True, readonly=True, compute='_amount_all', tracking=5)
    amount_by_group = fields.Binary(string="Tax amount by group", compute='_amount_by_group', help="type: [(name, amount, base, formated amount, formated base)]")
    amount_tax = fields.Monetary(string='Taxes', store=True, readonly=True, compute='_amount_all')
    amount_total = fields.Monetary(string='Total', store=True, readonly=True, compute='_amount_all', tracking=4)
    currency_rate = fields.Float("Currency Rate", compute='_compute_currency_rate', compute_sudo=True, store=True, digits=(12, 6), readonly=True, help='The rate of the currency to the currency of rate 1 applicable at the date of the order')

    payment_term_id = fields.Many2one(
        'account.payment.term', string='Payment Terms', check_company=True,  # Unrequired company
        domain="['|', ('company_id', '=', False), ('company_id', '=', company_id)]",)
    fiscal_position_id = fields.Many2one(
        'account.fiscal.position', string='Fiscal Position',
        domain="[('company_id', '=', company_id)]", check_company=True,
        help="Fiscal positions are used to adapt taxes and accounts for particular customers or sales orders/invoices."
        "The default value comes from the customer.")
    company_id = fields.Many2one('res.company', 'Company', required=True, index=True, default=lambda self: self.env.company)
    team_id = fields.Many2one(
        'crm.team', 'Sales Team',
        change_default=True, default=_get_default_team, check_company=True,  # Unrequired company
        domain="['|', ('company_id', '=', False), ('company_id', '=', company_id)]")

    signature = fields.Image('Signature', help='Signature received through the portal.', copy=False, attachment=True, max_width=1024, max_height=1024)
    signed_by = fields.Char('Signed By', help='Name of the person that signed the SO.', copy=False)
    signed_on = fields.Datetime('Signed On', help='Date of the signature.', copy=False)

    commitment_date = fields.Datetime('Delivery Date',
                                      states={'draft': [('readonly', False)], 'sent': [('readonly', False)]},
                                      copy=False, readonly=True,
                                      help="This is the delivery date promised to the customer. "
                                           "If set, the delivery order will be scheduled based on "
                                           "this date rather than product lead times.")
    expected_date = fields.Datetime("Expected Date", compute='_compute_expected_date', store=False,  # Note: can not be stored since depends on today()
        help="Delivery date you can promise to the customer, computed from the minimum lead time of the order lines.")
    amount_undiscounted = fields.Float('Amount Before Discount', compute='_compute_amount_undiscounted', digits=0)

    type_name = fields.Char('Type Name', compute='_compute_type_name')

    transaction_ids = fields.Many2many('payment.transaction', 'sale_order_transaction_rel', 'sale_order_id', 'transaction_id',
                                       string='Transactions', copy=False, readonly=True)
    authorized_transaction_ids = fields.Many2many('payment.transaction', compute='_compute_authorized_transaction_ids',
                                                  string='Authorized Transactions', copy=False, readonly=True)

    _sql_constraints = [
        ('date_order_conditional_required', "CHECK( (state IN ('sale', 'done') AND date_order IS NOT NULL) OR state NOT IN ('sale', 'done') )", "A confirmed sales order requires a confirmation date."),
    ]

    @api.constrains('company_id', 'order_line')
    def _check_order_line_company_id(self):
        for order in self:
            companies = order.order_line.product_id.company_id
            if companies and companies != order.company_id:
                bad_products = order.order_line.product_id.filtered(lambda p: p.company_id and p.company_id != order.company_id)
                raise ValidationError((_("Your quotation contains products from company %s whereas your quotation belongs to company %s. \n Please change the company of your quotation or remove the products from other companies (%s).") % (', '.join(companies.mapped('display_name')), order.company_id.display_name, ', '.join(bad_products.mapped('display_name')))))

    @api.depends('pricelist_id', 'date_order', 'company_id')
    def _compute_currency_rate(self):
        for order in self:
            if not order.company_id:
                order.currency_rate = order.currency_id.with_context(date=order.date_order).rate or 1.0
                continue
            elif order.company_id.currency_id and order.currency_id:  # the following crashes if any one is undefined
                order.currency_rate = self.env['res.currency']._get_conversion_rate(order.company_id.currency_id, order.currency_id, order.company_id, order.date_order)
            else:
                order.currency_rate = 1.0

    def _compute_access_url(self):
        super(SaleOrder, self)._compute_access_url()
        for order in self:
            order.access_url = '/my/orders/%s' % (order.id)

    def _compute_is_expired(self):
        today = fields.Date.today()
        for order in self:
            order.is_expired = order.state == 'sent' and order.validity_date and order.validity_date < today

    @api.depends('order_line.customer_lead', 'date_order', 'order_line.state')
    def _compute_expected_date(self):
        """ For service and consumable, we only take the min dates. This method is extended in sale_stock to
            take the picking_policy of SO into account.
        """
        for order in self:
            dates_list = []
            for line in order.order_line.filtered(lambda x: x.state != 'cancel' and not x._is_delivery() and not x.display_type):
                dt = line._expected_date()
                dates_list.append(dt)
            if dates_list:
                order.expected_date = fields.Datetime.to_string(min(dates_list))
            else:
                order.expected_date = False

    def _compute_remaining_validity_days(self):
        for record in self:
            if record.validity_date:
                record.remaining_validity_days = (record.validity_date - fields.Date.context_today(record)).days + 1
            else:
                record.remaining_validity_days = 0

    @api.depends('transaction_ids')
    def _compute_authorized_transaction_ids(self):
        for trans in self:
            trans.authorized_transaction_ids = trans.transaction_ids.filtered(lambda t: t.state == 'authorized')

    def _compute_amount_undiscounted(self):
        for order in self:
            total = 0.0
            for line in order.order_line:
                total += line.price_subtotal + line.price_unit * ((line.discount or 0.0) / 100.0) * line.product_uom_qty  # why is there a discount in a field named amount_undiscounted ??
            order.amount_undiscounted = total

    @api.depends('state')
    def _compute_type_name(self):
        for record in self:
            record.type_name = _('Quotation') if record.state in ('draft', 'sent', 'cancel') else _('Sales Order')

    def unlink(self):
        for order in self:
            if order.state not in ('draft', 'cancel'):
                raise UserError(_('You can not delete a sent quotation or a confirmed sales order. You must first cancel it.'))
        return super(SaleOrder, self).unlink()

    def validate_taxes_on_sales_order(self):
        # Override for correct taxcloud computation
        # when using coupon and delivery
        return True

    def _track_subtype(self, init_values):
        self.ensure_one()
        if 'state' in init_values and self.state == 'sale':
            return self.env.ref('sale.mt_order_confirmed')
        elif 'state' in init_values and self.state == 'sent':
            return self.env.ref('sale.mt_order_sent')
        return super(SaleOrder, self)._track_subtype(init_values)

    @api.onchange('partner_shipping_id', 'partner_id', 'company_id')
    def onchange_partner_shipping_id(self):
        """
        Trigger the change of fiscal position when the shipping address is modified.
        """
        self.fiscal_position_id = self.env['account.fiscal.position'].with_context(
            force_company=self.company_id.id).get_fiscal_position(
                self.partner_id.id,
                self.partner_shipping_id.id)
        return {}

    @api.onchange('partner_id')
    def onchange_partner_id(self):
        """
        Update the following fields when the partner is changed:
        - Pricelist
        - Payment terms
        - Invoice address
        - Delivery address
        - Sales Team
        """
        if not self.partner_id:
            self.update({
                'partner_invoice_id': False,
                'partner_shipping_id': False,
                'fiscal_position_id': False,
            })
            return

        addr = self.partner_id.address_get(['delivery', 'invoice'])
        partner_user = self.partner_id.user_id or self.partner_id.commercial_partner_id.user_id
        values = {
            'pricelist_id': self.partner_id.property_product_pricelist and self.partner_id.property_product_pricelist.id or False,
            'payment_term_id': self.partner_id.property_payment_term_id and self.partner_id.property_payment_term_id.id or False,
            'partner_invoice_id': addr['invoice'],
            'partner_shipping_id': addr['delivery'],
        }
        user_id = partner_user.id
        if not self.env.context.get('not_self_saleperson'):
            user_id = user_id or self.env.uid
        if user_id and self.user_id.id != user_id:
            values['user_id'] = user_id

        if self.env['ir.config_parameter'].sudo().get_param('account.use_invoice_terms') and self.env.company.invoice_terms:
            values['note'] = self.with_context(lang=self.partner_id.lang).env.company.invoice_terms
        if not self.env.context.get('not_self_saleperson') or not self.team_id:
            values['team_id'] = self.env['crm.team'].with_context(
                default_team_id=self.partner_id.team_id.id
            )._get_default_team_id(domain=['|', ('company_id', '=', self.company_id.id), ('company_id', '=', False)], user_id=user_id)
        self.update(values)

    @api.onchange('user_id')
    def onchange_user_id(self):
        if self.user_id:
            self.team_id = self.env['crm.team'].with_context(
                default_team_id=self.team_id.id
            )._get_default_team_id(user_id=self.user_id.id)

    @api.onchange('partner_id')
    def onchange_partner_id_warning(self):
        if not self.partner_id:
            return
        warning = {}
        title = False
        message = False
        partner = self.partner_id

        # If partner has no warning, check its company
        if partner.sale_warn == 'no-message' and partner.parent_id:
            partner = partner.parent_id

        if partner.sale_warn and partner.sale_warn != 'no-message':
            # Block if partner only has warning but parent company is blocked
            if partner.sale_warn != 'block' and partner.parent_id and partner.parent_id.sale_warn == 'block':
                partner = partner.parent_id
            title = ("Warning for %s") % partner.name
            message = partner.sale_warn_msg
            warning = {
                    'title': title,
                    'message': message,
            }
            if partner.sale_warn == 'block':
                self.update({'partner_id': False, 'partner_invoice_id': False, 'partner_shipping_id': False, 'pricelist_id': False})
                return {'warning': warning}

        if warning:
            return {'warning': warning}

    @api.onchange('commitment_date')
    def _onchange_commitment_date(self):
        """ Warn if the commitment dates is sooner than the expected date """
        if (self.commitment_date and self.expected_date and self.commitment_date < self.expected_date):
            return {
                'warning': {
                    'title': _('Requested date is too soon.'),
                    'message': _("The delivery date is sooner than the expected date."
                                 "You may be unable to honor the delivery date.")
                }
            }

    @api.model
    def create(self, vals):
        if vals.get('name', _('New')) == _('New'):
            seq_date = None
            if 'date_order' in vals:
                seq_date = fields.Datetime.context_timestamp(self, fields.Datetime.to_datetime(vals['date_order']))
            if 'company_id' in vals:
                vals['name'] = self.env['ir.sequence'].with_context(force_company=vals['company_id']).next_by_code(
                    'sale.order', sequence_date=seq_date) or _('New')
            else:
                vals['name'] = self.env['ir.sequence'].next_by_code('sale.order', sequence_date=seq_date) or _('New')

        # Makes sure partner_invoice_id', 'partner_shipping_id' and 'pricelist_id' are defined
        if any(f not in vals for f in ['partner_invoice_id', 'partner_shipping_id', 'pricelist_id']):
            partner = self.env['res.partner'].browse(vals.get('partner_id'))
            addr = partner.address_get(['delivery', 'invoice'])
            vals['partner_invoice_id'] = vals.setdefault('partner_invoice_id', addr['invoice'])
            vals['partner_shipping_id'] = vals.setdefault('partner_shipping_id', addr['delivery'])
            vals['pricelist_id'] = vals.setdefault('pricelist_id', partner.property_product_pricelist and partner.property_product_pricelist.id)
        result = super(SaleOrder, self).create(vals)
        return result

    def _write(self, values):
        """ Override of private write method in order to generate activities
        based in the invoice status. As the invoice status is a computed field
        triggered notably when its lines and linked invoice status changes the
        flow does not necessarily goes through write if the action was not done
        on the SO itself. We hence override the _write to catch the computation
        of invoice_status field. """
        if self.env.context.get('mail_activity_automation_skip'):
            return super(SaleOrder, self)._write(values)

        if 'invoice_status' in values:
            if values['invoice_status'] == 'upselling':
                filtered_self = self.search([('id', 'in', self.ids),
                                             ('user_id', '!=', False),
                                             ('invoice_status', '!=', 'upselling')])
                filtered_self.activity_unlink(['sale.mail_act_sale_upsell'])
                for order in filtered_self:
                    order.activity_schedule(
                        'sale.mail_act_sale_upsell',
                        user_id=order.user_id.id,
                        note=_("Upsell <a href='#' data-oe-model='%s' data-oe-id='%d'>%s</a> for customer <a href='#' data-oe-model='%s' data-oe-id='%s'>%s</a>") % (
                            order._name, order.id, order.name,
                            order.partner_id._name, order.partner_id.id, order.partner_id.display_name))

        return super(SaleOrder, self)._write(values)

    def copy_data(self, default=None):
        if default is None:
            default = {}
        if 'order_line' not in default:
            default['order_line'] = [(0, 0, line.copy_data()[0]) for line in self.order_line.filtered(lambda l: not l.is_downpayment)]
        return super(SaleOrder, self).copy_data(default)

    def name_get(self):
        if self._context.get('sale_show_partner_name'):
            res = []
            for order in self:
                name = order.name
                if order.partner_id.name:
                    name = '%s - %s' % (name, order.partner_id.name)
                res.append((order.id, name))
            return res
        return super(SaleOrder, self).name_get()

    @api.model
    def _name_search(self, name, args=None, operator='ilike', limit=100, name_get_uid=None):
        if self._context.get('sale_show_partner_name'):
            if operator == 'ilike' and not (name or '').strip():
                domain = []
            elif operator in ('ilike', 'like', '=', '=like', '=ilike'):
                domain = expression.AND([
                    args or [],
                    ['|', ('name', operator, name), ('partner_id.name', operator, name)]
                ])
                order_ids = self._search(domain, limit=limit, access_rights_uid=name_get_uid)
                return models.lazy_name_get(self.browse(order_ids).with_user(name_get_uid))
        return super(SaleOrder, self)._name_search(name, args=args, operator=operator, limit=limit, name_get_uid=name_get_uid)

    def _prepare_invoice(self):
        """
        Prepare the dict of values to create the new invoice for a sales order. This method may be
        overridden to implement custom invoice generation (making sure to call super() to establish
        a clean extension chain).
        """
        self.ensure_one()
        # ensure a correct context for the _get_default_journal method and company-dependent fields
        self = self.with_context(default_company_id=self.company_id.id, force_company=self.company_id.id)
        journal = self.env['account.move'].with_context(default_type='out_invoice')._get_default_journal()
        if not journal:
            raise UserError(_('Please define an accounting sales journal for the company %s (%s).') % (self.company_id.name, self.company_id.id))

        invoice_vals = {
            'ref': self.client_order_ref or '',
            'type': 'out_invoice',
            'narration': self.note,
            'currency_id': self.pricelist_id.currency_id.id,
            'campaign_id': self.campaign_id.id,
            'medium_id': self.medium_id.id,
            'source_id': self.source_id.id,
            'invoice_user_id': self.user_id and self.user_id.id,
            'team_id': self.team_id.id,
            'partner_id': self.partner_invoice_id.id,
            'partner_shipping_id': self.partner_shipping_id.id,
            'invoice_partner_bank_id': self.company_id.partner_id.bank_ids[:1].id,
            'fiscal_position_id': self.fiscal_position_id.id or self.partner_invoice_id.property_account_position_id.id,
            'journal_id': journal.id,  # company comes from the journal
            'invoice_origin': self.name,
            'invoice_payment_term_id': self.payment_term_id.id,
            'invoice_payment_ref': self.reference,
            'transaction_ids': [(6, 0, self.transaction_ids.ids)],
            'invoice_line_ids': [],
            'company_id': self.company_id.id,
        }
        return invoice_vals

    def action_quotation_sent(self):
        if self.filtered(lambda so: so.state != 'draft'):
            raise UserError(_('Only draft orders can be marked as sent directly.'))
        for order in self:
            order.message_subscribe(partner_ids=order.partner_id.ids)
        self.write({'state': 'sent'})

    def action_view_invoice(self):
        invoices = self.mapped('invoice_ids')
        action = self.env.ref('account.action_move_out_invoice_type').read()[0]
        if len(invoices) > 1:
            action['domain'] = [('id', 'in', invoices.ids)]
        elif len(invoices) == 1:
            form_view = [(self.env.ref('account.view_move_form').id, 'form')]
            if 'views' in action:
                action['views'] = form_view + [(state,view) for state,view in action['views'] if view != 'form']
            else:
                action['views'] = form_view
            action['res_id'] = invoices.id
        else:
            action = {'type': 'ir.actions.act_window_close'}

        context = {
            'default_type': 'out_invoice',
        }
        if len(self) == 1:
            context.update({
                'default_partner_id': self.partner_id.id,
                'default_partner_shipping_id': self.partner_shipping_id.id,
                'default_invoice_payment_term_id': self.payment_term_id.id or self.partner_id.property_payment_term_id.id or self.env['account.move'].default_get(['invoice_payment_term_id']).get('invoice_payment_term_id'),
                'default_invoice_origin': self.mapped('name'),
                'default_user_id': self.user_id.id,
            })
        action['context'] = context
        return action

    def _get_invoice_grouping_keys(self):
        return ['company_id', 'partner_id', 'currency_id']

    def _create_invoices(self, grouped=False, final=False):
        """
        Create the invoice associated to the SO.
        :param grouped: if True, invoices are grouped by SO id. If False, invoices are grouped by
                        (partner_invoice_id, currency)
        :param final: if True, refunds will be generated if necessary
        :returns: list of created invoices
        """
        if not self.env['account.move'].check_access_rights('create', False):
            try:
                self.check_access_rights('write')
                self.check_access_rule('write')
            except AccessError:
                return self.env['account.move']

        precision = self.env['decimal.precision'].precision_get('Product Unit of Measure')

        # 1) Create invoices.
        invoice_vals_list = []
        for order in self:
            pending_section = None

            # Invoice values.
            invoice_vals = order._prepare_invoice()

            # Invoice line values (keep only necessary sections).
            for line in order.order_line:
                if line.display_type == 'line_section':
                    pending_section = line
                    continue
                if line.display_type != 'line_note' and float_is_zero(line.qty_to_invoice, precision_digits=precision):
                    continue
                if line.qty_to_invoice > 0 or (line.qty_to_invoice < 0 and final) or line.display_type == 'line_note':
                    if pending_section:
                        invoice_vals['invoice_line_ids'].append((0, 0, pending_section._prepare_invoice_line()))
                        pending_section = None
                    invoice_vals['invoice_line_ids'].append((0, 0, line._prepare_invoice_line()))

            if not invoice_vals['invoice_line_ids']:
                raise UserError(_('There is no invoiceable line. If a product has a Delivered quantities invoicing policy, please make sure that a quantity has been delivered.'))

            invoice_vals_list.append(invoice_vals)

        if not invoice_vals_list:
            raise UserError(_(
                'There is no invoiceable line. If a product has a Delivered quantities invoicing policy, please make sure that a quantity has been delivered.'))

        # 2) Manage 'grouped' parameter: group by (partner_id, currency_id).
        if not grouped:
            new_invoice_vals_list = []
            invoice_grouping_keys = self._get_invoice_grouping_keys()
            for grouping_keys, invoices in groupby(invoice_vals_list, key=lambda x: [x.get(grouping_key) for grouping_key in invoice_grouping_keys]):
                origins = set()
                payment_refs = set()
                refs = set()
                ref_invoice_vals = None
                for invoice_vals in invoices:
                    if not ref_invoice_vals:
                        ref_invoice_vals = invoice_vals
                    else:
                        ref_invoice_vals['invoice_line_ids'] += invoice_vals['invoice_line_ids']
                    origins.add(invoice_vals['invoice_origin'])
                    payment_refs.add(invoice_vals['invoice_payment_ref'])
                    refs.add(invoice_vals['ref'])
                ref_invoice_vals.update({
                    'ref': ', '.join(refs)[:2000],
                    'invoice_origin': ', '.join(origins),
                    'invoice_payment_ref': len(payment_refs) == 1 and payment_refs.pop() or False,
                })
                new_invoice_vals_list.append(ref_invoice_vals)
            invoice_vals_list = new_invoice_vals_list

        # 3) Create invoices.

        # As part of the invoice creation, we make sure the sequence of multiple SO do not interfere
        # in a single invoice. Example:
        # SO 1:
        # - Section A (sequence: 10)
        # - Product A (sequence: 11)
        # SO 2:
        # - Section B (sequence: 10)
        # - Product B (sequence: 11)
        #
        # If SO 1 & 2 are grouped in the same invoice, the result will be:
        # - Section A (sequence: 10)
        # - Section B (sequence: 10)
        # - Product A (sequence: 11)
        # - Product B (sequence: 11)
        #
        # Resequencing should be safe, however we resequence only if there are less invoices than
        # orders, meaning a grouping might have been done. This could also mean that only a part
        # of the selected SO are invoiceable, but resequencing in this case shouldn't be an issue.
        if len(invoice_vals_list) < len(self):
            SaleOrderLine = self.env['sale.order.line']
            for invoice in invoice_vals_list:
                sequence = 1
                for line in invoice['invoice_line_ids']:
                    line[2]['sequence'] = SaleOrderLine._get_invoice_line_sequence(new=sequence, old=line[2]['sequence'])
                    sequence += 1

        # Manage the creation of invoices in sudo because a salesperson must be able to generate an invoice from a
        # sale order without "billing" access rights. However, he should not be able to create an invoice from scratch.
        moves = self.env['account.move'].sudo().with_context(default_type='out_invoice').create(invoice_vals_list)

        # 4) Some moves might actually be refunds: convert them if the total amount is negative
        # We do this after the moves have been created since we need taxes, etc. to know if the total
        # is actually negative or not
        if final:
            moves.sudo().filtered(lambda m: m.amount_total < 0).action_switch_invoice_into_refund_credit_note()
        for move in moves:
            move.message_post_with_view('mail.message_origin_link',
                values={'self': move, 'origin': move.line_ids.mapped('sale_line_ids.order_id')},
                subtype_id=self.env.ref('mail.mt_note').id
            )
        return moves

    def action_draft(self):
        orders = self.filtered(lambda s: s.state in ['cancel', 'sent'])
        return orders.write({
            'state': 'draft',
            'signature': False,
            'signed_by': False,
            'signed_on': False,
        })

    def action_cancel(self):
        return self.write({'state': 'cancel'})

    def _find_mail_template(self, force_confirmation_template=False):
        template_id = False

        if force_confirmation_template or (self.state == 'sale' and not self.env.context.get('proforma', False)):
            template_id = int(self.env['ir.config_parameter'].sudo().get_param('sale.default_confirmation_template'))
            template_id = self.env['mail.template'].search([('id', '=', template_id)]).id
            if not template_id:
                template_id = self.env['ir.model.data'].xmlid_to_res_id('sale.mail_template_sale_confirmation', raise_if_not_found=False)
        if not template_id:
            template_id = self.env['ir.model.data'].xmlid_to_res_id('sale.email_template_edi_sale', raise_if_not_found=False)

        return template_id

    def action_quotation_send(self):
        ''' Opens a wizard to compose an email, with relevant mail template loaded by default '''
        self.ensure_one()
        template_id = self._find_mail_template()
        lang = self.env.context.get('lang')
        template = self.env['mail.template'].browse(template_id)
        if template.lang:
            lang = template._render_template(template.lang, 'sale.order', self.ids[0])
        ctx = {
            'default_model': 'sale.order',
            'default_res_id': self.ids[0],
            'default_use_template': bool(template_id),
            'default_template_id': template_id,
            'default_composition_mode': 'comment',
            'mark_so_as_sent': True,
            'custom_layout': "mail.mail_notification_paynow",
            'proforma': self.env.context.get('proforma', False),
            'force_email': True,
            'model_description': self.with_context(lang=lang).type_name,
        }
        return {
            'type': 'ir.actions.act_window',
            'view_mode': 'form',
            'res_model': 'mail.compose.message',
            'views': [(False, 'form')],
            'view_id': False,
            'target': 'new',
            'context': ctx,
        }

    @api.returns('mail.message', lambda value: value.id)
    def message_post(self, **kwargs):
        if self.env.context.get('mark_so_as_sent'):
            self.filtered(lambda o: o.state == 'draft').with_context(tracking_disable=True).write({'state': 'sent'})
            self.env.company.sudo().set_onboarding_step_done('sale_onboarding_sample_quotation_state')
        return super(SaleOrder, self.with_context(mail_post_autofollow=True)).message_post(**kwargs)

    def _send_order_confirmation_mail(self):
        if self.env.su:
            # sending mail in sudo was meant for it being sent from superuser
            self = self.with_user(SUPERUSER_ID)
        template_id = self._find_mail_template(force_confirmation_template=True)
        if template_id:
            for order in self:
                order.with_context(force_send=True).message_post_with_template(template_id, composition_mode='comment', email_layout_xmlid="mail.mail_notification_paynow")

    def action_done(self):
        for order in self:
            tx = order.sudo().transaction_ids.get_last_transaction()
            if tx and tx.state == 'pending' and tx.acquirer_id.provider == 'transfer':
                tx._set_transaction_done()
                tx.write({'is_processed': True})
        return self.write({'state': 'done'})

    def action_unlock(self):
        self.write({'state': 'sale'})

    def _action_confirm(self):
        """ Implementation of additionnal mecanism of Sales Order confirmation.
            This method should be extended when the confirmation should generated
            other documents. In this method, the SO are in 'sale' state (not yet 'done').
        """
        # create an analytic account if at least an expense product
        for order in self:
            if any([expense_policy not in [False, 'no'] for expense_policy in order.order_line.mapped('product_id.expense_policy')]):
                if not order.analytic_account_id:
                    order._create_analytic_account()

        return True

    def action_confirm(self):
        if self._get_forbidden_state_confirm() & set(self.mapped('state')):
            raise UserError(_(
                'It is not allowed to confirm an order in the following states: %s'
            ) % (', '.join(self._get_forbidden_state_confirm())))

        for order in self.filtered(lambda order: order.partner_id not in order.message_partner_ids):
            order.message_subscribe([order.partner_id.id])
        self.write({
            'state': 'sale',
            'date_order': fields.Datetime.now()
        })

        # Context key 'default_name' is sometimes propagated up to here.
        # We don't need it and it creates issues in the creation of linked records.
        context = self._context.copy()
        context.pop('default_name', None)

        self.with_context(context)._action_confirm()
        if self.env.user.has_group('sale.group_auto_done_setting'):
            self.action_done()
        return True

    def _get_forbidden_state_confirm(self):
        return {'done', 'cancel'}

    def _prepare_analytic_account_data(self, prefix=None):
        """
        Prepare method for analytic account data

        :param prefix: The prefix of the to-be-created analytic account name
        :type prefix: string
        :return: dictionary of value for new analytic account creation
        """
        name = self.name
        if prefix:
            name = prefix + ": " + self.name
        return {
            'name': name,
            'code': self.client_order_ref,
            'company_id': self.company_id.id,
            'partner_id': self.partner_id.id
        }

    def _create_analytic_account(self, prefix=None):
        for order in self:
            analytic = self.env['account.analytic.account'].create(order._prepare_analytic_account_data(prefix))
            order.analytic_account_id = analytic

    def _amount_by_group(self):
        for order in self:
            currency = order.currency_id or order.company_id.currency_id
            fmt = partial(formatLang, self.with_context(lang=order.partner_id.lang).env, currency_obj=currency)
            res = {}
            for line in order.order_line:
                price_reduce = line.price_unit * (1.0 - line.discount / 100.0)
                taxes = line.tax_id.compute_all(price_reduce, quantity=line.product_uom_qty, product=line.product_id, partner=order.partner_shipping_id)['taxes']
                for tax in line.tax_id:
                    group = tax.tax_group_id
                    res.setdefault(group, {'amount': 0.0, 'base': 0.0})
                    for t in taxes:
                        if t['id'] == tax.id or t['id'] in tax.children_tax_ids.ids:
                            res[group]['amount'] += t['amount']
                            res[group]['base'] += t['base']
            res = sorted(res.items(), key=lambda l: l[0].sequence)
            order.amount_by_group = [(
                l[0].name, l[1]['amount'], l[1]['base'],
                fmt(l[1]['amount']), fmt(l[1]['base']),
                len(res),
            ) for l in res]

    def has_to_be_signed(self, include_draft=False):
        return (self.state == 'sent' or (self.state == 'draft' and include_draft)) and not self.is_expired and self.require_signature and not self.signature

    def has_to_be_paid(self, include_draft=False):
        transaction = self.get_portal_last_transaction()
        return (self.state == 'sent' or (self.state == 'draft' and include_draft)) and not self.is_expired and self.require_payment and transaction.state != 'done' and self.amount_total

    def _notify_get_groups(self):
        """ Give access button to users and portal customer as portal is integrated
        in sale. Customer and portal group have probably no right to see
        the document so they don't have the access button. """
        groups = super(SaleOrder, self)._notify_get_groups()

        self.ensure_one()
        if self.state not in ('draft', 'cancel'):
            for group_name, group_method, group_data in groups:
                if group_name not in ('customer', 'portal'):
                    group_data['has_button_access'] = True

        return groups

    def _create_payment_transaction(self, vals):
        '''Similar to self.env['payment.transaction'].create(vals) but the values are filled with the
        current sales orders fields (e.g. the partner or the currency).
        :param vals: The values to create a new payment.transaction.
        :return: The newly created payment.transaction record.
        '''
        # Ensure the currencies are the same.
        currency = self[0].pricelist_id.currency_id
        if any([so.pricelist_id.currency_id != currency for so in self]):
            raise ValidationError(_('A transaction can\'t be linked to sales orders having different currencies.'))

        # Ensure the partner are the same.
        partner = self[0].partner_id
        if any([so.partner_id != partner for so in self]):
            raise ValidationError(_('A transaction can\'t be linked to sales orders having different partners.'))

        # Try to retrieve the acquirer. However, fallback to the token's acquirer.
        acquirer_id = vals.get('acquirer_id')
        acquirer = False
        payment_token_id = vals.get('payment_token_id')

        if payment_token_id:
            payment_token = self.env['payment.token'].sudo().browse(payment_token_id)

            # Check payment_token/acquirer matching or take the acquirer from token
            if acquirer_id:
                acquirer = self.env['payment.acquirer'].browse(acquirer_id)
                if payment_token and payment_token.acquirer_id != acquirer:
                    raise ValidationError(_('Invalid token found! Token acquirer %s != %s') % (
                    payment_token.acquirer_id.name, acquirer.name))
                if payment_token and payment_token.partner_id != partner:
                    raise ValidationError(_('Invalid token found! Token partner %s != %s') % (
                    payment_token.partner.name, partner.name))
            else:
                acquirer = payment_token.acquirer_id

        # Check an acquirer is there.
        if not acquirer_id and not acquirer:
            raise ValidationError(_('A payment acquirer is required to create a transaction.'))

        if not acquirer:
            acquirer = self.env['payment.acquirer'].browse(acquirer_id)

        # Check a journal is set on acquirer.
        if not acquirer.journal_id:
            raise ValidationError(_('A journal must be specified of the acquirer %s.' % acquirer.name))

        if not acquirer_id and acquirer:
            vals['acquirer_id'] = acquirer.id

        vals.update({
            'amount': sum(self.mapped('amount_total')),
            'currency_id': currency.id,
            'partner_id': partner.id,
            'sale_order_ids': [(6, 0, self.ids)],
            'type': self[0]._get_payment_type(vals.get('type')=='form_save'),
        })

        transaction = self.env['payment.transaction'].create(vals)

        # Process directly if payment_token
        if transaction.payment_token_id:
            transaction.s2s_do_transaction()

        return transaction

    def preview_sale_order(self):
        self.ensure_one()
        return {
            'type': 'ir.actions.act_url',
            'target': 'self',
            'url': self.get_portal_url(),
        }

    def _force_lines_to_invoice_policy_order(self):
        for line in self.order_line:
            if self.state in ['sale', 'done']:
                line.qty_to_invoice = line.product_uom_qty - line.qty_invoiced
            else:
                line.qty_to_invoice = 0

    def payment_action_capture(self):
        self.authorized_transaction_ids.s2s_capture_transaction()

    def payment_action_void(self):
        self.authorized_transaction_ids.s2s_void_transaction()

    def get_portal_last_transaction(self):
        self.ensure_one()
        return self.transaction_ids.get_last_transaction()

    @api.model
    def _get_customer_lead(self, product_tmpl_id):
        return False

    def _get_report_base_filename(self):
        self.ensure_one()
        return '%s %s' % (self.type_name, self.name)

    def _get_share_url(self, redirect=False, signup_partner=False, pid=None):
        """Override for sales order.

        If the SO is in a state where an action is required from the partner,
        return the URL with a login token. Otherwise, return the URL with a
        generic access token (no login).
        """
        self.ensure_one()
        if self.state not in ['sale', 'done']:
            auth_param = url_encode(self.partner_id.signup_get_auth_param()[self.partner_id.id])
            return self.get_portal_url(query_string='&%s' % auth_param)
        return super(SaleOrder, self)._get_share_url(redirect, signup_partner, pid)

    def _get_payment_type(self, tokenize=False):
        self.ensure_one()
        return 'form_save' if tokenize else 'form'

    def _get_portal_return_action(self):
        """ Return the action used to display orders when returning from customer portal. """
        self.ensure_one()
        return self.env.ref('sale.action_quotations_with_onboarding')

    def add_option_to_order_with_taxcloud(self):
        self.ensure_one()


class SaleOrderLine(models.Model):
    _name = 'sale.order.line'
    _description = 'Sales Order Line'
    _order = 'order_id, sequence, id'
    _check_company_auto = True

    @api.depends('state', 'product_uom_qty', 'qty_delivered', 'qty_to_invoice', 'qty_invoiced')
    def _compute_invoice_status(self):
        """
        Compute the invoice status of a SO line. Possible statuses:
        - no: if the SO is not in status 'sale' or 'done', we consider that there is nothing to
          invoice. This is also hte default value if the conditions of no other status is met.
        - to invoice: we refer to the quantity to invoice of the line. Refer to method
          `_get_to_invoice_qty()` for more information on how this quantity is calculated.
        - upselling: this is possible only for a product invoiced on ordered quantities for which
          we delivered more than expected. The could arise if, for example, a project took more
          time than expected but we decided not to invoice the extra cost to the client. This
          occurs onyl in state 'sale', so that when a SO is set to done, the upselling opportunity
          is removed from the list.
        - invoiced: the quantity invoiced is larger or equal to the quantity ordered.
        """
        precision = self.env['decimal.precision'].precision_get('Product Unit of Measure')
        for line in self:
            if line.state not in ('sale', 'done'):
                line.invoice_status = 'no'
            elif not float_is_zero(line.qty_to_invoice, precision_digits=precision):
                line.invoice_status = 'to invoice'
            elif line.state == 'sale' and line.product_id.invoice_policy == 'order' and\
                    float_compare(line.qty_delivered, line.product_uom_qty, precision_digits=precision) == 1:
                line.invoice_status = 'upselling'
            elif float_compare(line.qty_invoiced, line.product_uom_qty, precision_digits=precision) >= 0:
                line.invoice_status = 'invoiced'
            else:
                line.invoice_status = 'no'

    def _expected_date(self):
        self.ensure_one()
        order_date = fields.Datetime.from_string(self.order_id.date_order if self.order_id.state in ['sale', 'done'] else fields.Datetime.now())
        return order_date + timedelta(days=self.customer_lead or 0.0)

    @api.depends('product_uom_qty', 'discount', 'price_unit', 'tax_id')
    def _compute_amount(self):
        """
        Compute the amounts of the SO line.
        """
        for line in self:
            price = line.price_unit * (1 - (line.discount or 0.0) / 100.0)
            taxes = line.tax_id.compute_all(price, line.order_id.currency_id, line.product_uom_qty, product=line.product_id, partner=line.order_id.partner_shipping_id)
            line.update({
                'price_tax': sum(t.get('amount', 0.0) for t in taxes.get('taxes', [])),
                'price_total': taxes['total_included'],
                'price_subtotal': taxes['total_excluded'],
            })
            if self.env.context.get('import_file', False) and not self.env.user.user_has_groups('account.group_account_manager'):
                line.tax_id.invalidate_cache(['invoice_repartition_line_ids'], [line.tax_id.id])

    @api.depends('product_id', 'order_id.state', 'qty_invoiced', 'qty_delivered')
    def _compute_product_updatable(self):
        for line in self:
            if line.state in ['done', 'cancel'] or (line.state == 'sale' and (line.qty_invoiced > 0 or line.qty_delivered > 0)):
                line.product_updatable = False
            else:
                line.product_updatable = True

    # no trigger product_id.invoice_policy to avoid retroactively changing SO
    @api.depends('qty_invoiced', 'qty_delivered', 'product_uom_qty', 'order_id.state')
    def _get_to_invoice_qty(self):
        """
        Compute the quantity to invoice. If the invoice policy is order, the quantity to invoice is
        calculated from the ordered quantity. Otherwise, the quantity delivered is used.
        """
        for line in self:
            if line.order_id.state in ['sale', 'done']:
                if line.product_id.invoice_policy == 'order':
                    line.qty_to_invoice = line.product_uom_qty - line.qty_invoiced
                else:
                    line.qty_to_invoice = line.qty_delivered - line.qty_invoiced
            else:
                line.qty_to_invoice = 0

    @api.depends('invoice_lines.move_id.state', 'invoice_lines.quantity')
    def _get_invoice_qty(self):
        """
        Compute the quantity invoiced. If case of a refund, the quantity invoiced is decreased. Note
        that this is the case only if the refund is generated from the SO and that is intentional: if
        a refund made would automatically decrease the invoiced quantity, then there is a risk of reinvoicing
        it automatically, which may not be wanted at all. That's why the refund has to be created from the SO
        """
        for line in self:
            qty_invoiced = 0.0
            for invoice_line in line.invoice_lines:
                if invoice_line.move_id.state != 'cancel':
                    if invoice_line.move_id.type == 'out_invoice':
                        qty_invoiced += invoice_line.product_uom_id._compute_quantity(invoice_line.quantity, line.product_uom)
                    elif invoice_line.move_id.type == 'out_refund':
                        qty_invoiced -= invoice_line.product_uom_id._compute_quantity(invoice_line.quantity, line.product_uom)
            line.qty_invoiced = qty_invoiced

    @api.depends('price_unit', 'discount')
    def _get_price_reduce(self):
        for line in self:
            line.price_reduce = line.price_unit * (1.0 - line.discount / 100.0)

    @api.depends('price_total', 'product_uom_qty')
    def _get_price_reduce_tax(self):
        for line in self:
            line.price_reduce_taxinc = line.price_total / line.product_uom_qty if line.product_uom_qty else 0.0

    @api.depends('price_subtotal', 'product_uom_qty')
    def _get_price_reduce_notax(self):
        for line in self:
            line.price_reduce_taxexcl = line.price_subtotal / line.product_uom_qty if line.product_uom_qty else 0.0

    def _compute_tax_id(self):
        for line in self:
            fpos = line.order_id.fiscal_position_id or line.order_id.partner_id.property_account_position_id
            # If company_id is set in the order, always filter taxes by the company
            taxes = line.product_id.taxes_id.filtered(lambda r: r.company_id == line.order_id.company_id)
            line.tax_id = fpos.map_tax(taxes, line.product_id, line.order_id.partner_shipping_id) if fpos else taxes

    @api.model
    def _get_purchase_price(self, pricelist, product, product_uom, date):
        return {}

    @api.model
    def _prepare_add_missing_fields(self, values):
        """ Deduce missing required fields from the onchange """
        res = {}
        onchange_fields = ['name', 'price_unit', 'product_uom', 'tax_id']
        if values.get('order_id') and values.get('product_id') and any(f not in values for f in onchange_fields):
            line = self.new(values)
            line.product_id_change()
            for field in onchange_fields:
                if field not in values:
                    res[field] = line._fields[field].convert_to_write(line[field], line)
        return res

    @api.model_create_multi
    def create(self, vals_list):
        for values in vals_list:
            if values.get('display_type', self.default_get(['display_type'])['display_type']):
                values.update(product_id=False, price_unit=0, product_uom_qty=0, product_uom=False, customer_lead=0)

            values.update(self._prepare_add_missing_fields(values))

        lines = super().create(vals_list)
        for line in lines:
            if line.product_id and line.order_id.state == 'sale':
                msg = _("Extra line with %s ") % (line.product_id.display_name,)
                line.order_id.message_post(body=msg)
                # create an analytic account if at least an expense product
                if line.product_id.expense_policy not in [False, 'no'] and not line.order_id.analytic_account_id:
                    line.order_id._create_analytic_account()
        return lines

    _sql_constraints = [
        ('accountable_required_fields',
            "CHECK(display_type IS NOT NULL OR (product_id IS NOT NULL AND product_uom IS NOT NULL))",
            "Missing required fields on accountable sale order line."),
        ('non_accountable_null_fields',
            "CHECK(display_type IS NULL OR (product_id IS NULL AND price_unit = 0 AND product_uom_qty = 0 AND product_uom IS NULL AND customer_lead = 0))",
            "Forbidden values on non-accountable sale order line"),
    ]

    def _update_line_quantity(self, values):
        orders = self.mapped('order_id')
        for order in orders:
            order_lines = self.filtered(lambda x: x.order_id == order)
            msg = "<b>" + _("The ordered quantity has been updated.") + "</b><ul>"
            for line in order_lines:
                msg += "<li> %s:" % (line.product_id.display_name,)
                msg += "<br/>" + _("Ordered Quantity") + ": %s -> %s <br/>" % (
                line.product_uom_qty, float(values['product_uom_qty']),)
                if line.product_id.type in ('consu', 'product'):
                    msg += _("Delivered Quantity") + ": %s <br/>" % (line.qty_delivered,)
                msg += _("Invoiced Quantity") + ": %s <br/>" % (line.qty_invoiced,)
            msg += "</ul>"
            order.message_post(body=msg)

    def write(self, values):
        if 'display_type' in values and self.filtered(lambda line: line.display_type != values.get('display_type')):
            raise UserError(_("You cannot change the type of a sale order line. Instead you should delete the current line and create a new line of the proper type."))

        if 'product_uom_qty' in values:
            precision = self.env['decimal.precision'].precision_get('Product Unit of Measure')
            self.filtered(
                lambda r: r.state == 'sale' and float_compare(r.product_uom_qty, values['product_uom_qty'], precision_digits=precision) != 0)._update_line_quantity(values)

        # Prevent writing on a locked SO.
        protected_fields = self._get_protected_fields()
        if 'done' in self.mapped('order_id.state') and any(f in values.keys() for f in protected_fields):
            protected_fields_modified = list(set(protected_fields) & set(values.keys()))
            fields = self.env['ir.model.fields'].search([
                ('name', 'in', protected_fields_modified), ('model', '=', self._name)
            ])
            raise UserError(
                _('It is forbidden to modify the following fields in a locked order:\n%s')
                % '\n'.join(fields.mapped('field_description'))
            )

        result = super(SaleOrderLine, self).write(values)
        return result

    order_id = fields.Many2one('sale.order', string='Order Reference', required=True, ondelete='cascade', index=True, copy=False)
    name = fields.Text(string='Description', required=True)
    sequence = fields.Integer(string='Sequence', default=10)

    invoice_lines = fields.Many2many('account.move.line', 'sale_order_line_invoice_rel', 'order_line_id', 'invoice_line_id', string='Invoice Lines', copy=False)
    invoice_status = fields.Selection([
        ('upselling', 'Upselling Opportunity'),
        ('invoiced', 'Fully Invoiced'),
        ('to invoice', 'To Invoice'),
        ('no', 'Nothing to Invoice')
        ], string='Invoice Status', compute='_compute_invoice_status', store=True, readonly=True, default='no')
    price_unit = fields.Float('Unit Price', required=True, digits='Product Price', default=0.0)

    price_subtotal = fields.Monetary(compute='_compute_amount', string='Subtotal', readonly=True, store=True)
    price_tax = fields.Float(compute='_compute_amount', string='Total Tax', readonly=True, store=True)
    price_total = fields.Monetary(compute='_compute_amount', string='Total', readonly=True, store=True)

    price_reduce = fields.Float(compute='_get_price_reduce', string='Price Reduce', digits='Product Price', readonly=True, store=True)
    tax_id = fields.Many2many('account.tax', string='Taxes', domain=['|', ('active', '=', False), ('active', '=', True)])
    price_reduce_taxinc = fields.Monetary(compute='_get_price_reduce_tax', string='Price Reduce Tax inc', readonly=True, store=True)
    price_reduce_taxexcl = fields.Monetary(compute='_get_price_reduce_notax', string='Price Reduce Tax excl', readonly=True, store=True)

    discount = fields.Float(string='Discount (%)', digits='Discount', default=0.0)

    product_id = fields.Many2one(
        'product.product', string='Product', domain="[('sale_ok', '=', True), '|', ('company_id', '=', False), ('company_id', '=', company_id)]",
        change_default=True, ondelete='restrict', check_company=True)  # Unrequired company
    product_template_id = fields.Many2one(
        'product.template', string='Product Template',
        related="product_id.product_tmpl_id", domain=[('sale_ok', '=', True)])
    product_updatable = fields.Boolean(compute='_compute_product_updatable', string='Can Edit Product', readonly=True, default=True)
    product_uom_qty = fields.Float(string='Quantity', digits='Product Unit of Measure', required=True, default=1.0)
    product_uom = fields.Many2one('uom.uom', string='Unit of Measure', domain="[('category_id', '=', product_uom_category_id)]")
    product_uom_category_id = fields.Many2one(related='product_id.uom_id.category_id', readonly=True)
    product_custom_attribute_value_ids = fields.One2many('product.attribute.custom.value', 'sale_order_line_id', string="Custom Values", copy=True)

    # M2M holding the values of product.attribute with create_variant field set to 'no_variant'
    # It allows keeping track of the extra_price associated to those attribute values and add them to the SO line description
    product_no_variant_attribute_value_ids = fields.Many2many('product.template.attribute.value', string="Extra Values", ondelete='restrict')

    qty_delivered_method = fields.Selection([
        ('manual', 'Manual'),
        ('analytic', 'Analytic From Expenses')
    ], string="Method to update delivered qty", compute='_compute_qty_delivered_method', compute_sudo=True, store=True, readonly=True,
        help="According to product configuration, the delivered quantity can be automatically computed by mechanism :\n"
             "  - Manual: the quantity is set manually on the line\n"
             "  - Analytic From expenses: the quantity is the quantity sum from posted expenses\n"
             "  - Timesheet: the quantity is the sum of hours recorded on tasks linked to this sale line\n"
             "  - Stock Moves: the quantity comes from confirmed pickings\n")
    qty_delivered = fields.Float('Delivered Quantity', copy=False, compute='_compute_qty_delivered', inverse='_inverse_qty_delivered', compute_sudo=True, store=True, digits='Product Unit of Measure', default=0.0)
    qty_delivered_manual = fields.Float('Delivered Manually', copy=False, digits='Product Unit of Measure', default=0.0)
    qty_to_invoice = fields.Float(
        compute='_get_to_invoice_qty', string='To Invoice Quantity', store=True, readonly=True,
        digits='Product Unit of Measure')
    qty_invoiced = fields.Float(
        compute='_get_invoice_qty', string='Invoiced Quantity', store=True, readonly=True,
        compute_sudo=True,
        digits='Product Unit of Measure')

    untaxed_amount_invoiced = fields.Monetary("Untaxed Invoiced Amount", compute='_compute_untaxed_amount_invoiced', compute_sudo=True, store=True)
    untaxed_amount_to_invoice = fields.Monetary("Untaxed Amount To Invoice", compute='_compute_untaxed_amount_to_invoice', compute_sudo=True, store=True)

    salesman_id = fields.Many2one(related='order_id.user_id', store=True, string='Salesperson', readonly=True)
    currency_id = fields.Many2one(related='order_id.currency_id', depends=['order_id.currency_id'], store=True, string='Currency', readonly=True)
    company_id = fields.Many2one(related='order_id.company_id', string='Company', store=True, readonly=True, index=True)
    order_partner_id = fields.Many2one(related='order_id.partner_id', store=True, string='Customer', readonly=False)
    analytic_tag_ids = fields.Many2many(
        'account.analytic.tag', string='Analytic Tags',
        domain="['|', ('company_id', '=', False), ('company_id', '=', company_id)]")
    analytic_line_ids = fields.One2many('account.analytic.line', 'so_line', string="Analytic lines")
    is_expense = fields.Boolean('Is expense', help="Is true if the sales order line comes from an expense or a vendor bills")
    is_downpayment = fields.Boolean(
        string="Is a down payment", help="Down payments are made when creating invoices from a sales order."
        " They are not copied when duplicating a sales order.")

    state = fields.Selection([
        ('draft', 'Quotation'),
        ('sent', 'Quotation Sent'),
        ('sale', 'Sales Order'),
        ('done', 'Done'),
        ('cancel', 'Cancelled'),
    ], related='order_id.state', string='Order Status', readonly=True, copy=False, store=True, default='draft')

    customer_lead = fields.Float(
        'Lead Time', required=True, default=0.0,
        help="Number of days between the order confirmation and the shipping of the products to the customer")

    display_type = fields.Selection([
        ('line_section', "Section"),
        ('line_note', "Note")], default=False, help="Technical field for UX purpose.")

    @api.depends('state', 'is_expense')
    def _compute_qty_delivered_method(self):
        """ Sale module compute delivered qty for product [('type', 'in', ['consu']), ('service_type', '=', 'manual')]
                - consu + expense_policy : analytic (sum of analytic unit_amount)
                - consu + no expense_policy : manual (set manually on SOL)
                - service (+ service_type='manual', the only available option) : manual

            This is true when only sale is installed: sale_stock redifine the behavior for 'consu' type,
            and sale_timesheet implements the behavior of 'service' + service_type=timesheet.
        """
        for line in self:
            if line.is_expense:
                line.qty_delivered_method = 'analytic'
            else:  # service and consu
                line.qty_delivered_method = 'manual'

    @api.depends('qty_delivered_method', 'qty_delivered_manual', 'analytic_line_ids.so_line', 'analytic_line_ids.unit_amount', 'analytic_line_ids.product_uom_id')
    def _compute_qty_delivered(self):
        """ This method compute the delivered quantity of the SO lines: it covers the case provide by sale module, aka
            expense/vendor bills (sum of unit_amount of AAL), and manual case.
            This method should be overridden to provide other way to automatically compute delivered qty. Overrides should
            take their concerned so lines, compute and set the `qty_delivered` field, and call super with the remaining
            records.
        """
        # compute for analytic lines
        lines_by_analytic = self.filtered(lambda sol: sol.qty_delivered_method == 'analytic')
        mapping = lines_by_analytic._get_delivered_quantity_by_analytic([('amount', '<=', 0.0)])
        for so_line in lines_by_analytic:
            so_line.qty_delivered = mapping.get(so_line.id or so_line._origin.id, 0.0)
        # compute for manual lines
        for line in self:
            if line.qty_delivered_method == 'manual':
                line.qty_delivered = line.qty_delivered_manual or 0.0

    def _get_delivered_quantity_by_analytic(self, additional_domain):
        """ Compute and write the delivered quantity of current SO lines, based on their related
            analytic lines.
            :param additional_domain: domain to restrict AAL to include in computation (required since timesheet is an AAL with a project ...)
        """
        result = {}

        # avoid recomputation if no SO lines concerned
        if not self:
            return result

        # group analytic lines by product uom and so line
        domain = expression.AND([[('so_line', 'in', self.ids)], additional_domain])
        data = self.env['account.analytic.line'].read_group(
            domain,
            ['so_line', 'unit_amount', 'product_uom_id'], ['product_uom_id', 'so_line'], lazy=False
        )

        # convert uom and sum all unit_amount of analytic lines to get the delivered qty of SO lines
        # browse so lines and product uoms here to make them share the same prefetch
        lines = self.browse([item['so_line'][0] for item in data])
        lines_map = {line.id: line for line in lines}
        product_uom_ids = [item['product_uom_id'][0] for item in data if item['product_uom_id']]
        product_uom_map = {uom.id: uom for uom in self.env['uom.uom'].browse(product_uom_ids)}
        for item in data:
            if not item['product_uom_id']:
                continue
            so_line_id = item['so_line'][0]
            so_line = lines_map[so_line_id]
            result.setdefault(so_line_id, 0.0)
            uom = product_uom_map.get(item['product_uom_id'][0])
            if so_line.product_uom.category_id == uom.category_id:
                qty = uom._compute_quantity(item['unit_amount'], so_line.product_uom, rounding_method='HALF-UP')
            else:
                qty = item['unit_amount']
            result[so_line_id] += qty

        return result

    @api.onchange('qty_delivered')
    def _inverse_qty_delivered(self):
        """ When writing on qty_delivered, if the value should be modify manually (`qty_delivered_method` = 'manual' only),
            then we put the value in `qty_delivered_manual`. Otherwise, `qty_delivered_manual` should be False since the
            delivered qty is automatically compute by other mecanisms.
        """
        for line in self:
            if line.qty_delivered_method == 'manual':
                line.qty_delivered_manual = line.qty_delivered
            else:
                line.qty_delivered_manual = 0.0

    @api.depends('invoice_lines', 'invoice_lines.price_total', 'invoice_lines.move_id.state', 'invoice_lines.move_id.type')
    def _compute_untaxed_amount_invoiced(self):
        """ Compute the untaxed amount already invoiced from the sale order line, taking the refund attached
            the so line into account. This amount is computed as
                SUM(inv_line.price_subtotal) - SUM(ref_line.price_subtotal)
            where
                `inv_line` is a customer invoice line linked to the SO line
                `ref_line` is a customer credit note (refund) line linked to the SO line
        """
        for line in self:
            amount_invoiced = 0.0
            for invoice_line in line.invoice_lines:
                if invoice_line.move_id.state == 'posted':
                    invoice_date = invoice_line.move_id.invoice_date or fields.Date.today()
                    if invoice_line.move_id.type == 'out_invoice':
                        amount_invoiced += invoice_line.currency_id._convert(invoice_line.price_subtotal, line.currency_id, line.company_id, invoice_date)
                    elif invoice_line.move_id.type == 'out_refund':
                        amount_invoiced -= invoice_line.currency_id._convert(invoice_line.price_subtotal, line.currency_id, line.company_id, invoice_date)
            line.untaxed_amount_invoiced = amount_invoiced

    @api.depends('state', 'price_reduce', 'product_id', 'untaxed_amount_invoiced', 'qty_delivered', 'product_uom_qty')
    def _compute_untaxed_amount_to_invoice(self):
        """ Total of remaining amount to invoice on the sale order line (taxes excl.) as
                total_sol - amount already invoiced
            where Total_sol depends on the invoice policy of the product.

            Note: Draft invoice are ignored on purpose, the 'to invoice' amount should
            come only from the SO lines.
        """
        for line in self:
            amount_to_invoice = 0.0
            if line.state in ['sale', 'done']:
                # Note: do not use price_subtotal field as it returns zero when the ordered quantity is
                # zero. It causes problem for expense line (e.i.: ordered qty = 0, deli qty = 4,
                # price_unit = 20 ; subtotal is zero), but when you can invoice the line, you see an
                # amount and not zero. Since we compute untaxed amount, we can use directly the price
                # reduce (to include discount) without using `compute_all()` method on taxes.
                price_subtotal = 0.0
                if line.product_id.invoice_policy == 'delivery':
                    price_subtotal = line.price_reduce * line.qty_delivered
                else:
                    price_subtotal = line.price_reduce * line.product_uom_qty
                if len(line.tax_id.filtered(lambda tax: tax.price_include)) > 0:
                    # As included taxes are not excluded from the computed subtotal, `compute_all()` method
                    # has to be called to retrieve the subtotal without them.
                    # `price_reduce_taxexcl` cannot be used as it is computed from `price_subtotal` field. (see upper Note)
                    price_subtotal = line.tax_id.compute_all(price_subtotal)['total_excluded']

                if any(line.invoice_lines.mapped(lambda l: l.discount != line.discount)):
                    # In case of re-invoicing with different discount we try to calculate manually the
                    # remaining amount to invoice
                    amount = 0
                    for l in line.invoice_lines:
                        if len(l.tax_ids.filtered(lambda tax: tax.price_include)) > 0:
                            amount += l.tax_ids.compute_all(l.currency_id._convert(l.price_unit, line.currency_id, line.company_id, l.date or fields.Date.today(), round=False) * l.quantity)['total_excluded']
                        else:
                            amount += l.currency_id._convert(l.price_unit, line.currency_id, line.company_id, l.date or fields.Date.today(), round=False) * l.quantity

                    amount_to_invoice = max(price_subtotal - amount, 0)
                else:
                    amount_to_invoice = price_subtotal - line.untaxed_amount_invoiced

            line.untaxed_amount_to_invoice = amount_to_invoice

    def _get_invoice_line_sequence(self, new=0, old=0):
        """
        Method intended to be overridden in third-party module if we want to prevent the resequencing
        of invoice lines.

        :param int new:   the new line sequence
        :param int old:   the old line sequence

        :return:          the sequence of the SO line, by default the new one.
        """
        return new or old

    def _prepare_invoice_line(self):
        """
        Prepare the dict of values to create the new invoice line for a sales order line.

        :param qty: float quantity to invoice
        """
        self.ensure_one()
        res = {
            'display_type': self.display_type,
            'sequence': self.sequence,
            'name': self.name,
            'product_id': self.product_id.id,
            'product_uom_id': self.product_uom.id,
            'quantity': self.qty_to_invoice,
            'discount': self.discount,
            'price_unit': self.price_unit,
            'tax_ids': [(6, 0, self.tax_id.ids)],
            'analytic_account_id': self.order_id.analytic_account_id.id,
            'analytic_tag_ids': [(6, 0, self.analytic_tag_ids.ids)],
            'sale_line_ids': [(4, self.id)],
        }
        if self.display_type:
            res['account_id'] = False
        return res

    def _prepare_procurement_values(self, group_id=False):
        """ Prepare specific key for moves or other components that will be created from a stock rule
        comming from a sale order line. This method could be override in order to add other custom key that could
        be used in move/po creation.
        """
        return {}

    def _get_display_price(self, product):
        # TO DO: move me in master/saas-16 on sale.order
        # awa: don't know if it's still the case since we need the "product_no_variant_attribute_value_ids" field now
        # to be able to compute the full price

        # it is possible that a no_variant attribute is still in a variant if
        # the type of the attribute has been changed after creation.
        no_variant_attributes_price_extra = [
            ptav.price_extra for ptav in self.product_no_variant_attribute_value_ids.filtered(
                lambda ptav:
                    ptav.price_extra and
                    ptav not in product.product_template_attribute_value_ids
            )
        ]
        if no_variant_attributes_price_extra:
            product = product.with_context(
                no_variant_attributes_price_extra=tuple(no_variant_attributes_price_extra)
            )

        if self.order_id.pricelist_id.discount_policy == 'with_discount':
            return product.with_context(pricelist=self.order_id.pricelist_id.id).price
        product_context = dict(self.env.context, partner_id=self.order_id.partner_id.id, date=self.order_id.date_order, uom=self.product_uom.id)

        final_price, rule_id = self.order_id.pricelist_id.with_context(product_context).get_product_price_rule(product or self.product_id, self.product_uom_qty or 1.0, self.order_id.partner_id)
        base_price, currency = self.with_context(product_context)._get_real_price_currency(product, rule_id, self.product_uom_qty, self.product_uom, self.order_id.pricelist_id.id)
        if currency != self.order_id.pricelist_id.currency_id:
            base_price = currency._convert(
                base_price, self.order_id.pricelist_id.currency_id,
                self.order_id.company_id or self.env.company, self.order_id.date_order or fields.Date.today())
        # negative discounts (= surcharge) are included in the display price
        return max(base_price, final_price)

    @api.onchange('product_id')
    def product_id_change(self):
        if not self.product_id:
            return
        valid_values = self.product_id.product_tmpl_id.valid_product_template_attribute_line_ids.product_template_value_ids
        # remove the is_custom values that don't belong to this template
        for pacv in self.product_custom_attribute_value_ids:
            if pacv.custom_product_template_attribute_value_id not in valid_values:
                self.product_custom_attribute_value_ids -= pacv

        # remove the no_variant attributes that don't belong to this template
        for ptav in self.product_no_variant_attribute_value_ids:
            if ptav._origin not in valid_values:
                self.product_no_variant_attribute_value_ids -= ptav

        vals = {}
        if not self.product_uom or (self.product_id.uom_id.id != self.product_uom.id):
            vals['product_uom'] = self.product_id.uom_id
            vals['product_uom_qty'] = self.product_uom_qty or 1.0

        product = self.product_id.with_context(
            lang=get_lang(self.env, self.order_id.partner_id.lang).code,
            partner=self.order_id.partner_id,
            quantity=vals.get('product_uom_qty') or self.product_uom_qty,
            date=self.order_id.date_order,
            pricelist=self.order_id.pricelist_id.id,
            uom=self.product_uom.id
        )

        vals.update(name=self.get_sale_order_line_multiline_description_sale(product))

        self._compute_tax_id()

        if self.order_id.pricelist_id and self.order_id.partner_id:
            vals['price_unit'] = self.env['account.tax']._fix_tax_included_price_company(self._get_display_price(product), product.taxes_id, self.tax_id, self.company_id)
        self.update(vals)

        title = False
        message = False
        result = {}
        warning = {}
        if product.sale_line_warn != 'no-message':
            title = _("Warning for %s") % product.name
            message = product.sale_line_warn_msg
            warning['title'] = title
            warning['message'] = message
            result = {'warning': warning}
            if product.sale_line_warn == 'block':
                self.product_id = False

        return result

    @api.onchange('product_uom', 'product_uom_qty')
    def product_uom_change(self):
        if not self.product_uom or not self.product_id:
            self.price_unit = 0.0
            return
        if self.order_id.pricelist_id and self.order_id.partner_id:
            product = self.product_id.with_context(
                lang=self.order_id.partner_id.lang,
                partner=self.order_id.partner_id,
                quantity=self.product_uom_qty,
                date=self.order_id.date_order,
                pricelist=self.order_id.pricelist_id.id,
                uom=self.product_uom.id,
                fiscal_position=self.env.context.get('fiscal_position')
            )
            self.price_unit = self.env['account.tax']._fix_tax_included_price_company(self._get_display_price(product), product.taxes_id, self.tax_id, self.company_id)

    def name_get(self):
        result = []
        for so_line in self.sudo():
            name = '%s - %s' % (so_line.order_id.name, so_line.name and so_line.name.split('\n')[0] or so_line.product_id.name)
            if so_line.order_partner_id.ref:
                name = '%s (%s)' % (name, so_line.order_partner_id.ref)
            result.append((so_line.id, name))
        return result

    @api.model
    def _name_search(self, name, args=None, operator='ilike', limit=100, name_get_uid=None):
        if operator in ('ilike', 'like', '=', '=like', '=ilike'):
            args = expression.AND([
                args or [],
                ['|', ('order_id.name', operator, name), ('name', operator, name)]
            ])
        return super(SaleOrderLine, self)._name_search(name, args=args, operator=operator, limit=limit, name_get_uid=name_get_uid)

    def _check_line_unlink(self):
        """
        Check wether a line can be deleted or not.

        Lines cannot be deleted if the order is confirmed; downpayment
        lines who have not yet been invoiced bypass that exception.
        :rtype: recordset sale.order.line
        :returns: set of lines that cannot be deleted
        """
        return self.filtered(lambda line: line.state in ('sale', 'done') and (line.invoice_lines or not line.is_downpayment))

    def unlink(self):
        if self._check_line_unlink():
            raise UserError(_('You can not remove an order line once the sales order is confirmed.\nYou should rather set the quantity to 0.'))
        return super(SaleOrderLine, self).unlink()

    def _get_real_price_currency(self, product, rule_id, qty, uom, pricelist_id):
        """Retrieve the price before applying the pricelist
            :param obj product: object of current product record
            :parem float qty: total quentity of product
            :param tuple price_and_rule: tuple(price, suitable_rule) coming from pricelist computation
            :param obj uom: unit of measure of current order line
            :param integer pricelist_id: pricelist id of sales order"""
        PricelistItem = self.env['product.pricelist.item']
        field_name = 'lst_price'
        currency_id = None
        product_currency = product.currency_id
        if rule_id:
            pricelist_item = PricelistItem.browse(rule_id)
            if pricelist_item.pricelist_id.discount_policy == 'without_discount':
                while pricelist_item.base == 'pricelist' and pricelist_item.base_pricelist_id and pricelist_item.base_pricelist_id.discount_policy == 'without_discount':
                    price, rule_id = pricelist_item.base_pricelist_id.with_context(uom=uom.id).get_product_price_rule(product, qty, self.order_id.partner_id)
                    pricelist_item = PricelistItem.browse(rule_id)

            if pricelist_item.base == 'standard_price':
                field_name = 'standard_price'
                product_currency = product.cost_currency_id
            elif pricelist_item.base == 'pricelist' and pricelist_item.base_pricelist_id:
                field_name = 'price'
                product = product.with_context(pricelist=pricelist_item.base_pricelist_id.id)
                product_currency = pricelist_item.base_pricelist_id.currency_id
            currency_id = pricelist_item.pricelist_id.currency_id

        if not currency_id:
            currency_id = product_currency
            cur_factor = 1.0
        else:
            if currency_id.id == product_currency.id:
                cur_factor = 1.0
            else:
                cur_factor = currency_id._get_conversion_rate(product_currency, currency_id, self.company_id or self.env.company, self.order_id.date_order or fields.Date.today())

        product_uom = self.env.context.get('uom') or product.uom_id.id
        if uom and uom.id != product_uom:
            # the unit price is in a different uom
            uom_factor = uom._compute_price(1.0, product.uom_id)
        else:
            uom_factor = 1.0

        return product[field_name] * uom_factor * cur_factor, currency_id

    def _get_protected_fields(self):
        return [
            'product_id', 'name', 'price_unit', 'product_uom', 'product_uom_qty',
            'tax_id', 'analytic_tag_ids'
        ]

    def _onchange_product_id_set_customer_lead(self):
        pass

    @api.onchange('product_id', 'price_unit', 'product_uom', 'product_uom_qty', 'tax_id')
    def _onchange_discount(self):
        if not (self.product_id and self.product_uom and
                self.order_id.partner_id and self.order_id.pricelist_id and
                self.order_id.pricelist_id.discount_policy == 'without_discount' and
                self.env.user.has_group('product.group_discount_per_so_line')):
            return

        self.discount = 0.0
        product = self.product_id.with_context(
            lang=self.order_id.partner_id.lang,
            partner=self.order_id.partner_id,
            quantity=self.product_uom_qty,
            date=self.order_id.date_order,
            pricelist=self.order_id.pricelist_id.id,
            uom=self.product_uom.id,
            fiscal_position=self.env.context.get('fiscal_position')
        )

        product_context = dict(self.env.context, partner_id=self.order_id.partner_id.id, date=self.order_id.date_order, uom=self.product_uom.id)

        price, rule_id = self.order_id.pricelist_id.with_context(product_context).get_product_price_rule(self.product_id, self.product_uom_qty or 1.0, self.order_id.partner_id)
        new_list_price, currency = self.with_context(product_context)._get_real_price_currency(product, rule_id, self.product_uom_qty, self.product_uom, self.order_id.pricelist_id.id)

        if new_list_price != 0:
            if self.order_id.pricelist_id.currency_id != currency:
                # we need new_list_price in the same currency as price, which is in the SO's pricelist's currency
                new_list_price = currency._convert(
                    new_list_price, self.order_id.pricelist_id.currency_id,
                    self.order_id.company_id or self.env.company, self.order_id.date_order or fields.Date.today())
            discount = (new_list_price - price) / new_list_price * 100
            if (discount > 0 and new_list_price > 0) or (discount < 0 and new_list_price < 0):
                self.discount = discount

    def _is_delivery(self):
        self.ensure_one()
        return False

    def get_sale_order_line_multiline_description_sale(self, product):
        """ Compute a default multiline description for this sales order line.

        In most cases the product description is enough but sometimes we need to append information that only
        exists on the sale order line itself.
        e.g:
        - custom attributes and attributes that don't create variants, both introduced by the "product configurator"
        - in event_sale we need to know specifically the sales order line as well as the product to generate the name:
          the product is not sufficient because we also need to know the event_id and the event_ticket_id (both which belong to the sale order line).
        """
        return product.get_product_multiline_description_sale() + self._get_sale_order_line_multiline_description_variants()

    def _get_sale_order_line_multiline_description_variants(self):
        """When using no_variant attributes or is_custom values, the product
        itself is not sufficient to create the description: we need to add
        information about those special attributes and values.

        :return: the description related to special variant attributes/values
        :rtype: string
        """
        if not self.product_custom_attribute_value_ids and not self.product_no_variant_attribute_value_ids:
            return ""

        name = "\n"

        custom_ptavs = self.product_custom_attribute_value_ids.custom_product_template_attribute_value_id
        no_variant_ptavs = self.product_no_variant_attribute_value_ids._origin

        # display the no_variant attributes, except those that are also
        # displayed by a custom (avoid duplicate description)
        for ptav in (no_variant_ptavs - custom_ptavs):
            name += "\n" + ptav.with_context(lang=self.order_id.partner_id.lang).display_name

        # Sort the values according to _order settings, because it doesn't work for virtual records in onchange
        custom_values = sorted(self.product_custom_attribute_value_ids, key=lambda r: (r.custom_product_template_attribute_value_id.id, r.id))
        # display the is_custom values
        for pacv in custom_values:
            name += "\n" + pacv.with_context(lang=self.order_id.partner_id.lang).display_name

        return name
