# -*- coding: utf-8 -*-
#
#
#    Authors: Guewen Baconnier
#    Copyright 2015 Camptocamp SA
#
#    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/>.
#
#

from openerp.osv import orm, fields


class IrModel(orm.Model):
    _inherit = 'ir.model'

    def _compute_has_an_active_field(self, cr, uid, ids, name,
                                     args, context=None):
        res = {}
        for model_id in ids:
            active_field_ids = self.pool['ir.model.fields'].search(
                cr, uid,
                [('model_id', '=', model_id),
                 ('name', '=', 'active'),
                 ],
                limit=1,
                context=context)
            res[model_id] = bool(active_field_ids)
        return res

    def _search_has_an_active_field(self, cr, uid, obj, name, args,
                                    context=None):
        if not len(args):
            return []
        fields_model = self.pool['ir.model.fields']
        domain = []
        for field, operator, value in args:
            assert field == name
            active_field_ids = fields_model.search(
                cr, uid, [('name', '=', 'active')], context=context)
            active_fields = fields_model.read(cr, uid, active_field_ids,
                                              fields=['model_id'],
                                              load='_classic_write',
                                              context=context)
            model_ids = [field['model_id'] for field in active_fields]
            if operator == '=' or not value:
                domain.append(('id', 'in', model_ids))
            elif operator == '!=' or value:
                domain.append(('id', 'not in', model_ids))
            else:
                raise AssertionError('operator %s not allowed' % operator)
        return domain

    _columns = {
        'has_an_active_field': fields.function(
            _compute_has_an_active_field,
            fnct_search=_search_has_an_active_field,
            string='Has an active field',
            readonly=True,
            type='boolean',
        ),
    }