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

import base64

from flectra import api, models
from flectra.addons.l10n_ch.models.mail_template import MailTemplate


def generate_email(self, res_ids, fields):
    """ Method overridden in order to add an attachment containing the ISR
    to the draft message when opening the 'send by mail' wizard on an invoice.
    This attachment generation will only occur if all the required data are
    present on the invoice. Otherwise, no ISR attachment will be created, and
    the mail will only contain the invoice (as defined in the mother method).
    """
    result = super(MailTemplate, self).generate_email(res_ids, fields)
    if self.model != 'account.move':
        return result

    multi_mode = True
    if isinstance(res_ids, int):
        res_ids = [res_ids]
        multi_mode = False

    if self.model == 'account.move':
        for record in self.env[self.model].browse(res_ids):
            inv_print_name = self._render_field('report_name', record.ids, compute_lang=True)[record.id]
            new_attachments = []
            if not self.env.company.l10n_ignore_qr_when_reconciled or record.payment_state != 'paid':
                if record.l10n_ch_isr_valid and self.env.company.l10n_add_isr_pdf:
                    # We add an attachment containing the ISR
                    isr_report_name = 'ISR-' + inv_print_name + '.pdf'
                    isr_pdf = self.env.ref('l10n_ch.l10n_ch_isr_report')._render_qweb_pdf(record.ids)[0]
                    isr_pdf = base64.b64encode(isr_pdf)
                    new_attachments.append((isr_report_name, isr_pdf))

                if record.partner_bank_id._eligible_for_qr_code('ch_qr', record.partner_id, record.currency_id) and self.env.company.l10n_add_qr_pdf:
                    # We add an attachment containing the QR-bill
                    qr_report_name = 'QR-bill-' + inv_print_name + '.pdf'
                    qr_pdf = self.env.ref('l10n_ch.l10n_ch_qr_report')._render_qweb_pdf(record.ids)[0]
                    qr_pdf = base64.b64encode(qr_pdf)
                    new_attachments.append((qr_report_name, qr_pdf))

            record_dict = multi_mode and result[record.id] or result
            attachments_list = record_dict.get('attachments', False)
            if attachments_list:
                attachments_list.extend(new_attachments)
            else:
                record_dict['attachments'] = new_attachments

    return result


# Patch / Override existing Method
MailTemplate.generate_email = generate_email