# Copyright 2015 Antonio Espinosa <antonio.espinosa@tecnativa.com>
# Copyright 2016 Jairo Llopis <jairo.llopis@tecnativa.com>
# Copyright 2021 Andrii Skrypka <andrijskrypa@ukr.net>
# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).

from odoo import api, fields, models
from odoo.osv.expression import AND, OR


class ResPartner(models.Model):
    _inherit = "res.partner"

    nuts1_id = fields.Many2one(
        comodel_name="res.partner.nuts",
        domain="[('level', '=', 1), ('id', 'in', allowed_nut_ids)]",
        string="NUTS L1",
    )
    nuts2_id = fields.Many2one(
        comodel_name="res.partner.nuts",
        domain="[('level', '=', 2), ('id', 'in', allowed_nut_ids)]",
        string="NUTS L2",
    )
    nuts3_id = fields.Many2one(
        comodel_name="res.partner.nuts",
        domain="[('level', '=', 3), ('id', 'in', allowed_nut_ids)]",
        string="NUTS L3",
    )
    nuts4_id = fields.Many2one(
        comodel_name="res.partner.nuts",
        domain="[('level', '=', 4), ('id', 'in', allowed_nut_ids)]",
        string="NUTS L4",
    )
    allowed_nut_ids = fields.Many2many(
        "res.partner.nuts",
        string="Allowed nuts",
        compute="_compute_allowed_nuts",
    )

    @api.depends("country_id", "nuts1_id", "nuts2_id", "nuts3_id")
    def _compute_allowed_nuts(self):
        Nuts = self.env["res.partner.nuts"]
        for partner in self:
            domain = []
            for level in range(1, 4):
                nuts = partner["nuts%d_id" % level]
                if nuts:
                    domain = OR(
                        [
                            domain,
                            [("parent_id", "=", nuts.id), ("level", "=", level + 1)],
                        ]
                    )
            if partner.country_id:
                domain = AND([[("country_id", "=", partner.country_id.id)], domain])
            partner.allowed_nut_ids = Nuts.search(domain)

    def _onchange_nuts(self, level):
        field = self["nuts%d_id" % level]
        country_id = field.country_id
        state_id = field.state_id
        if country_id and self.country_id != country_id:
            self.country_id = country_id
        if state_id and self.state_id != state_id:
            self.state_id = state_id
        if level > 1:
            parent_id = field.parent_id
            if parent_id:
                nuts_parent_level = "nuts%d_id" % (level - 1)
                parent_field = self[nuts_parent_level]
                if parent_field != parent_id:
                    self[nuts_parent_level] = parent_id

    @api.onchange("nuts4_id")
    def _onchange_nuts4_id(self):
        return self._onchange_nuts(4)

    @api.onchange("nuts3_id")
    def _onchange_nuts3_id(self):
        return self._onchange_nuts(3)

    @api.onchange("nuts2_id")
    def _onchange_nuts2_id(self):
        return self._onchange_nuts(2)

    @api.onchange("nuts1_id")
    def _onchange_nuts1_id(self):
        return self._onchange_nuts(1)

    @api.onchange("country_id")
    def _onchange_country_id_base_location_nuts(self):
        """Sensible values and domains for related fields."""
        fields = ["state_id", "nuts1_id", "nuts2_id", "nuts3_id", "nuts4_id"]
        for field in fields:
            if self.country_id and self[field].country_id != self.country_id:
                self[field] = False
        fields.remove("state_id")
        if self.country_id:
            nuts1 = self.env["res.partner.nuts"].search(
                [("level", "=", 1), ("country_id", "=", self.country_id.id)], limit=1
            )
            if self.nuts1_id.id != nuts1.id:
                self.nuts1_id = nuts1.id

    @api.onchange("state_id")
    def onchange_state_id_base_location_nuts(self):
        if self.state_id:
            self.country_id = self.state_id.country_id
            if self.country_id.state_level:
                nuts_state = self.env["res.partner.nuts"].search(
                    [
                        ("level", "=", self.country_id.state_level),
                        ("state_id", "=", self.state_id.id),
                    ],
                    limit=1,
                )
                if nuts_state:
                    field = "nuts%d_id" % self.country_id.state_level
                    self[field] = nuts_state

    @api.model
    def _address_fields(self):
        fields = super()._address_fields()
        if fields:
            fields += ["nuts1_id", "nuts2_id", "nuts3_id", "nuts4_id"]
        return fields