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

from odoo import models, fields, api, _
from odoo.exceptions import UserError, ValidationError
from odoo.tools.misc import formatLang, format_date

INV_LINES_PER_STUB = 9

class AccountRegisterPayments(models.TransientModel):
    _inherit = "account.register.payments"

    check_amount_in_words = fields.Char(string="Amount in Words")
    check_manual_sequencing = fields.Boolean(related='journal_id.check_manual_sequencing', readonly=1)
    # Note: a check_number == 0 means that it will be attributed when the check is printed
    check_number = fields.Integer(string="Check Number", readonly=True, copy=False, default=0,
        help="Number of the check corresponding to this payment. If your pre-printed check are not already numbered, "
             "you can manage the numbering in the journal configuration page.")

    @api.onchange('journal_id')
    def _onchange_journal_id(self):
        if hasattr(super(AccountRegisterPayments, self), '_onchange_journal_id'):
            super(AccountRegisterPayments, self)._onchange_journal_id()
        if self.journal_id.check_manual_sequencing:
            self.check_number = self.journal_id.check_sequence_id.number_next_actual

    @api.onchange('amount')
    def _onchange_amount(self):
        if hasattr(super(AccountRegisterPayments, self), '_onchange_amount'):
            super(AccountRegisterPayments, self)._onchange_amount()
        self.check_amount_in_words = self.currency_id.amount_to_text(self.amount) if self.currency_id else False

    def _prepare_payment_vals(self, invoices):
        res = super(AccountRegisterPayments, self)._prepare_payment_vals(invoices)
        if self.payment_method_id == self.env.ref('account_check_printing.account_payment_method_check'):
            res.update({
                'check_amount_in_words': self.currency_id.amount_to_text(res['amount']) if self.multi else self.check_amount_in_words,
            })
        return res


class AccountPayment(models.Model):
    _inherit = "account.payment"

    check_amount_in_words = fields.Char(string="Amount in Words")
    check_manual_sequencing = fields.Boolean(related='journal_id.check_manual_sequencing', readonly=1)
    check_number = fields.Integer(string="Check Number", readonly=True, copy=False,
        help="The selected journal is configured to print check numbers. If your pre-printed check paper already has numbers "
             "or if the current numbering is wrong, you can change it in the journal configuration page.")

    @api.onchange('amount','currency_id')
    def _onchange_amount(self):
        res = super(AccountPayment, self)._onchange_amount()
        self.check_amount_in_words = self.currency_id.amount_to_text(self.amount) if self.currency_id else ''
        return res

    def _check_communication(self, payment_method_id, communication):
        super(AccountPayment, self)._check_communication(payment_method_id, communication)
        if payment_method_id == self.env.ref('account_check_printing.account_payment_method_check').id:
            if not communication:
                return
            if len(communication) > 60:
                raise ValidationError(_("A check memo cannot exceed 60 characters."))

    @api.multi
    def post(self):
        res = super(AccountPayment, self).post()
        payment_method_check = self.env.ref('account_check_printing.account_payment_method_check')
        for payment in self.filtered(lambda p: p.payment_method_id == payment_method_check and p.check_manual_sequencing):
            sequence = payment.journal_id.check_sequence_id
            payment.check_number = sequence.next_by_id()
        return res

    @api.multi
    def print_checks(self):
        """ Check that the recordset is valid, set the payments state to sent and call print_checks() """
        # Since this method can be called via a client_action_multi, we need to make sure the received records are what we expect
        self = self.filtered(lambda r: r.payment_method_id.code == 'check_printing' and r.state != 'reconciled')

        if len(self) == 0:
            raise UserError(_("Payments to print as a checks must have 'Check' selected as payment method and "
                              "not have already been reconciled"))
        if any(payment.journal_id != self[0].journal_id for payment in self):
            raise UserError(_("In order to print multiple checks at once, they must belong to the same bank journal."))

        if not self[0].journal_id.check_manual_sequencing:
            # The wizard asks for the number printed on the first pre-printed check
            # so payments are attributed the number of the check the'll be printed on.
            last_printed_check = self.search([
                ('journal_id', '=', self[0].journal_id.id),
                ('check_number', '!=', 0)], order="check_number desc", limit=1)
            next_check_number = last_printed_check and last_printed_check.check_number + 1 or 1
            return {
                'name': _('Print Pre-numbered Checks'),
                'type': 'ir.actions.act_window',
                'res_model': 'print.prenumbered.checks',
                'view_type': 'form',
                'view_mode': 'form',
                'target': 'new',
                'context': {
                    'payment_ids': self.ids,
                    'default_next_check_number': next_check_number,
                }
            }
        else:
            self.filtered(lambda r: r.state == 'draft').post()
            return self.do_print_checks()

    @api.multi
    def unmark_sent(self):
        self.write({'state': 'posted'})

    @api.multi
    def do_print_checks(self):
        """ This method is a hook for l10n_xx_check_printing modules to implement actual check printing capabilities """
        raise UserError(_("You have to choose a check layout. For this, go in Apps, search for 'Checks layout' and install one."))


    def set_check_amount_in_words(self):
        for payment in self:
            payment.check_amount_in_words = payment.currency_id.amount_to_text(payment.amount) if payment.currency_id else ''

    #######################
    #CHECK PRINTING METHODS
    #######################
    def _check_fill_line(self, amount_str):
        return amount_str and (amount_str + ' ').ljust(200, '*') or ''

    def _check_build_page_info(self, i, p):
        multi_stub = self.company_id.account_check_printing_multi_stub
        return {
            'sequence_number': self.check_number if (self.journal_id.check_manual_sequencing and self.check_number != 0) else False,
            'payment_date': format_date(self.env, self.payment_date),
            'partner_id': self.partner_id,
            'partner_name': self.partner_id.name,
            'currency': self.currency_id,
            'state': self.state,
            'amount': formatLang(self.env, self.amount, currency_obj=self.currency_id) if i == 0 else 'VOID',
            'amount_in_word': self._check_fill_line(self.check_amount_in_words) if i == 0 else 'VOID',
            'memo': self.communication,
            'stub_cropped': not multi_stub and len(self.invoice_ids) > INV_LINES_PER_STUB,
            # If the payment does not reference an invoice, there is no stub line to display
            'stub_lines': p,
        }

    def _check_get_pages(self):
        """ Returns the data structure used by the template : a list of dicts containing what to print on pages.
        """
        stub_pages = self._check_make_stub_pages() or [False]
        pages = []
        for i, p in enumerate(stub_pages):
            pages.append(self._check_build_page_info(i, p))
        return pages

    def _check_make_stub_pages(self):
        """ The stub is the summary of paid invoices. It may spill on several pages, in which case only the check on
            first page is valid. This function returns a list of stub lines per page.
        """
        if len(self.reconciled_invoice_ids) == 0:
            return None

        multi_stub = self.company_id.account_check_printing_multi_stub

        invoices = self.reconciled_invoice_ids.sorted(key=lambda r: r.date_due)
        debits = invoices.filtered(lambda r: r.type == 'in_invoice')
        credits = invoices.filtered(lambda r: r.type == 'in_refund')

        # Prepare the stub lines
        if not credits:
            stub_lines = [self._check_make_stub_line(inv) for inv in invoices]
        else:
            stub_lines = [{'header': True, 'name': "Bills"}]
            stub_lines += [self._check_make_stub_line(inv) for inv in debits]
            stub_lines += [{'header': True, 'name': "Refunds"}]
            stub_lines += [self._check_make_stub_line(inv) for inv in credits]

        # Crop the stub lines or split them on multiple pages
        if not multi_stub:
            # If we need to crop the stub, leave place for an ellipsis line
            num_stub_lines = len(stub_lines) > INV_LINES_PER_STUB and INV_LINES_PER_STUB - 1 or INV_LINES_PER_STUB
            stub_pages = [stub_lines[:num_stub_lines]]
        else:
            stub_pages = []
            i = 0
            while i < len(stub_lines):
                # Make sure we don't start the credit section at the end of a page
                if len(stub_lines) >= i + INV_LINES_PER_STUB and stub_lines[i + INV_LINES_PER_STUB - 1].get('header'):
                    num_stub_lines = INV_LINES_PER_STUB - 1 or INV_LINES_PER_STUB
                else:
                    num_stub_lines = INV_LINES_PER_STUB
                stub_pages.append(stub_lines[i:i + num_stub_lines])
                i += num_stub_lines

        return stub_pages

    def _check_make_stub_line(self, invoice):
        """ Return the dict used to display an invoice/refund in the stub
        """
        # Find the account.partial.reconcile which are common to the invoice and the payment
        if invoice.type in ['in_invoice', 'out_refund']:
            invoice_sign = 1
            invoice_payment_reconcile = invoice.move_id.line_ids.mapped('matched_debit_ids').filtered(lambda r: r.debit_move_id in self.move_line_ids)
        else:
            invoice_sign = -1
            invoice_payment_reconcile = invoice.move_id.line_ids.mapped('matched_credit_ids').filtered(lambda r: r.credit_move_id in self.move_line_ids)

        if self.currency_id != self.journal_id.company_id.currency_id:
            amount_paid = abs(sum(invoice_payment_reconcile.mapped('amount_currency')))
        else:
            amount_paid = abs(sum(invoice_payment_reconcile.mapped('amount')))

        amount_residual = invoice_sign * invoice.residual

        return {
            'due_date': format_date(self.env, invoice.date_due),
            'number': invoice.reference and invoice.number + ' - ' + invoice.reference or invoice.number,
            'amount_total': formatLang(self.env, invoice_sign * invoice.amount_total, currency_obj=invoice.currency_id),
            'amount_residual': formatLang(self.env, amount_residual, currency_obj=invoice.currency_id) if amount_residual * 10**4 != 0 else '-',
            'amount_paid': formatLang(self.env, invoice_sign * amount_paid, currency_obj=invoice.currency_id),
            'currency': invoice.currency_id,
        }
