# -*- coding: utf-8 -*-
from odoo import models, fields, api

TYPES = [
    ("adm", "Administration"),
    ("sup", "Supervision"),
    ("ag", "General Assembly"),
]


class ResPartnerRelationInsctance(models.Model):
    _name = "res.partner.relation.instance"
    _description = "Partners relation instance"
    _order = "inst_type, short, name, id"

    name = fields.Char(
        string="Name",
        translate=True,
        required=True,
    )
    short = fields.Char(
        string="Short name",
        translate=True,
        required=True,
    )
    inst_type = fields.Selection(
        selection=TYPES,
        string="Instance type",
        required=True,
    )
    parent_id = fields.Many2one(
        comodel_name="res.partner.relation.instance",
        string="Superior instance",
    )
    parent_path = fields.Char(
        unaccent=False,
    )
    parents_and_self = fields.Many2many(
        comodel_name="res.partner.relation.instance",
        compute="_compute_parents_and_self",
    )
    child_ids = fields.One2many(
        comodel_name="res.partner.relation.instance",
        inverse_name="parent_id",
        string="Composing instances",
    )

    def name_get(self):
        res = []
        for instance in self:
            res.append(
                (instance.id, " / ".join(instance.parents_and_self.mapped("name")))
            )
        return res

    def _compute_parents_and_self(self):
        for instance in self:
            if instance.parent_path:
                instance.parents_and_self = self.env[self._model].browse(
                    [int(p) for p in instance.parent_path.split("/")[:-1]]
                )
            else:
                instance.parents_and_self = instance

    @api.constrains("parent_id")
    def check_parent_id(self):
        if not self._check_recursion():
            raise ValueError(_("Error ! You cannot create recursive instances."))