# This file is part of Tryton.  The COPYRIGHT file at the top level of
# this repository contains the full copyright notices and license terms.
from trytond.model import ModelView, ModelSQL, ModelSingleton, fields
from trytond.model import MultiValueMixin, ValueMixin
from trytond import backend
from trytond.tools.multivalue import migrate_property

__all__ = ['Configuration', 'ConfigurationSequence', 'ConfigurationLang']

party_sequence = fields.Many2One('ir.sequence', 'Party Sequence',
    domain=[
        ('code', '=', 'party.party'),
        ],
    help="Used to generate the party code.")
party_lang = fields.Many2One("ir.lang", 'Party Language',
    help="The default language for new parties.")


class Configuration(ModelSingleton, ModelSQL, ModelView, MultiValueMixin):
    'Party Configuration'
    __name__ = 'party.configuration'

    party_sequence = fields.MultiValue(party_sequence)
    party_lang = fields.MultiValue(party_lang)


class _ConfigurationValue(ModelSQL):

    _configuration_value_field = None

    @classmethod
    def __register__(cls, module_name):
        TableHandler = backend.get('TableHandler')
        exist = TableHandler.table_exist(cls._table)

        super(_ConfigurationValue, cls).__register__(module_name)

        if not exist:
            cls._migrate_property([], [], [])

    @classmethod
    def _migrate_property(cls, field_names, value_names, fields):
        field_names.append(cls._configuration_value_field)
        value_names.append(cls._configuration_value_field)
        migrate_property(
            'party.configuration', field_names, cls, value_names,
            fields=fields)


class ConfigurationSequence(_ConfigurationValue, ModelSQL, ValueMixin):
    'Party Configuration Sequence'
    __name__ = 'party.configuration.party_sequence'
    party_sequence = party_sequence
    _configuration_value_field = 'party_sequence'

    @classmethod
    def check_xml_record(cls, records, values):
        return True


class ConfigurationLang(_ConfigurationValue, ModelSQL, ValueMixin):
    'Party Configuration Lang'
    __name__ = 'party.configuration.party_lang'
    party_lang = party_lang
    _configuration_value_field = 'party_lang'