# -*- encoding: utf-8 -*-
##############################################################################
#
#    OpenERP, Open Source Management Solution
#    This module copyright (C) 2014 Savoir-faire Linux
#    (<http://www.savoirfairelinux.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/>.
#
##############################################################################

from openerp.osv import orm, fields


class document_file(orm.Model):
    _inherit = 'ir.attachment'

    _columns = {
        'attachment_document_ids': fields.one2many('ir.attachment.document',
                                                   'attachment_id',
                                                   'Records'),
    }

    def create(self, cr, uid, data, context=None):
        res = super(document_file, self).create(cr, uid, data, context=context)
        if 'res_model' and 'res_id' in data:
            ir_attachment_document_obj = self.pool.get('ir.attachment.document')
            doc_data = {
                'attachment_id': res,
                'res_model': data['res_model'],
                'res_id': data['res_id'],
                'res_name': data.get('res_name') or self.pool.get(data['res_model']).browse(cr, uid, data['res_id'], context=context).name
            }

            ir_attachment_document_obj.create(cr, uid, doc_data,
                                              context=context)

        return res

    def unlink(self, cr, uid, ids, context=None):
        ir_attach_doc_obj = self.pool.get('ir.attachment.document')
        if context is None:
            context = {}

        for line in self.browse(cr, uid, ids, context=context):
            if line.attachment_document_ids and len(line.attachment_document_ids) > 1:
                query = [
                    ('attachment_id', '=', line.id),
                    ('res_model', '=', line.res_model),
                    ('res_id', '=', line.res_id)
                ]
                id_to_unlink = ir_attach_doc_obj.search(
                    cr, uid, query, context=context)

                data = {
                    'res_id': False,
                    'res_model': False,
                    'res_name': False
                }
                self.write(cr, uid, ids, data, context=context)
                ir_attach_doc_obj.unlink(cr, uid, id_to_unlink,
                                         context=context)

            else:
                super(document_file, self).unlink(cr, uid, line.id,
                                                  context=context)
        return True


class ir_attachment_document(orm.Model):
    _description = 'Attachment Documents'
    _name = 'ir.attachment.document'

    _columns = {
        'res_id': fields.integer('Resource ID', readonly=True,
                                 help="The record id this is attached to."),
        'res_model': fields.char('Resource Model', size=64,
                                 readonly=True,
                                 help="The database object this attachment will be attached to"),
        'res_name': fields.char('Resource Name', type='char',
                                size=128,
                                readonly=True),
        'attachment_id': fields.many2one('ir.attachment', 'Attachment'),
    }

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