# -*- coding: utf-8 -*-

#    Copyright 2019 Fabien Bourgeois <fabien@yaltik.com>
#    Copyright 2019 Youssef El Ouahby <youssef@yaltik.com>
#
#    This program is free software: you can redistribute it and/or modify
#    it under the terms of the GNU Affero General Public License as
#    published by the Free Software Foundation, either version 3 of the
#    License, or (at your option) any later version.
#
#    This program is distributed in the hope that it will be useful,
#    but WITHOUT ANY WARRANTY; without even the implied warranty of
#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#    GNU Affero General Public License for more details.
#
#    You should have received a copy of the GNU Affero General Public License
#    along with this program.  If not, see <http://www.gnu.org/licenses/>.

""" GOLEM Member Age Range Management """

from odoo import models, fields, api, _
from odoo.exceptions import ValidationError


class GolemMemberAgeRange(models.Model):
    """ GOLEM Member Age Range Management """
    _name = 'golem.member.age.range'
    _description = 'GOLEM Member Age Range Management'
    _order = 'lower_bound asc'
    _sql_constraints = [(
        'golem_age_range_rule_name_uniq', 'UNIQUE (name)',
        _('This name has already been used. It must be unique.')
    )]

    name = fields.Char(required=True)
    lower_bound = fields.Integer(required=True)
    higher_bound = fields.Integer(required=True)

    @api.constrains('lower_bound', 'higher_bound')
    def check_bounds(self):
        """ Check member age bounds coherence and conflicts """
        for rng in self:
            if rng.lower_bound > rng.higher_bound:
                verr = _(u'The higher bound age must be higher than the lower '
                         'bound.')
                raise ValidationError(verr)
            rngs = self.env['golem.member.age.range'].search([])
            for each_rng in rngs:
                if each_rng.lower_bound < rng.lower_bound < each_rng.higher_bound:
                    verr = _(u'Lower bound age in range of an existing age '
                             'range.')
                    raise ValidationError(verr)
                if each_rng.lower_bound < rng.higher_bound < each_rng.higher_bound:
                    verr = _(u'Higher bound age in range of an existing age '
                             'range.')
                    raise ValidationError(verr)

    @api.onchange('lower_bound', 'higher_bound')
    def onchange_name(self):
        """ If no name, computes age range name """
        for rec in self:
            if not rec.name and rec.lower_bound and rec.higher_bound:
                rec.name = _(u'{}-{} years').format(
                    rec.lower_bound, rec.higher_bound
                )