# Copyright 2016 Jairo Llopis <jairo.llopis@tecnativa.com>
# Copyright 2020 Tecnativa - Pedro M. Baeza
# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).

from odoo import models, tools
from odoo.tools.safe_eval import safe_eval
from itertools import groupby


class MailMassMailing(models.Model):
    _inherit = "mail.mass_mailing"

    def update_opt_out(self, email, list_ids, value):
        """Save unsubscription reason when opting out from mailing."""
        self.ensure_one()
        action = "unsubscription" if value else "subscription"
        subscription_model = self.env['mail.mass_mailing.list_contact_rel']
        opt_out_records = subscription_model.search([
            ('contact_id.email', '=ilike', email),
            ('list_id', 'in', list_ids),
            ('opt_out', '!=', value),
        ])
        model_name = 'mail.mass_mailing.contact'
        for contact, subscriptions in groupby(opt_out_records,
                                              lambda r: r.contact_id):
            mailing_list_ids = [r.list_id.id for r in subscriptions]
            # reason_id and details are expected from the context
            self.env["mail.unsubscription"].create({
                "email": email,
                "mass_mailing_id": self.id,
                "unsubscriber_id": "%s,%d" % (model_name, contact.id),
                'mailing_list_ids': [(6, False, mailing_list_ids)],
                "action": action,
            })
        return super().update_opt_out(email, list_ids, value)

    def update_opt_out_other(self, email, res_ids, value):
        """Method for changing unsubscription for models with opt_out field."""
        model = self.env[self.mailing_model_real].with_context(
            active_test=False)
        action = "unsubscription" if value else "subscription"
        if 'opt_out' in model._fields:
            email_fname = 'email_from'
            if 'email' in model._fields:
                email_fname = 'email'
            records = model.search([
                ('id', 'in', res_ids), (email_fname, 'ilike', email)])
            records.write({'opt_out': value})
            for res_id in res_ids:
                self.env["mail.unsubscription"].create({
                    "email": email,
                    "mass_mailing_id": self.id,
                    "unsubscriber_id": "%s,%d" % (
                        self.mailing_model_real, res_id),
                    "action": action,
                })

    def _get_opt_out_list(self):
        """Handle models with opt_out field for excluding them."""
        self.ensure_one()
        model = self.env[self.mailing_model_real].with_context(
            active_test=False)
        if (self.mailing_model_real != "mail.mass_mailing.contact" and
                'opt_out' in model._fields):
            email_fname = 'email_from'
            if 'email' in model._fields:
                email_fname = 'email'
            domain = safe_eval(self.mailing_domain)
            domain = [('opt_out', '=', True)] + domain
            recs = self.env[self.mailing_model_real].search(domain)
            normalized_email = (
                tools.email_split(c[email_fname]) for c in recs)
            return set(e[0].lower() for e in normalized_email if e)
        return super()._get_opt_out_list()