# The COPYRIGHT file at the top level of
# this repository contains the full copyright notices and license terms.
from trytond.model import fields, ModelSQL
from trytond.pool import PoolMeta, Pool
from trytond.tools.multivalue import migrate_property
from trytond.modules.company.model import CompanyValueMixin
from trytond import backend

__all__ = ['Configuration', 'ConfigurationSequence', 'UnitLoad',
    'ConfigurationEDIOutputPath']


class Configuration:
    __metaclass__ = PoolMeta
    __name__ = 'stock.configuration'

    edocument_sequence = fields.MultiValue(
        fields.Many2One('ir.sequence', 'Electronic Document Sequence',
                        required=True))
    EDI_output_path = fields.MultiValue(fields.Char('EDI Output Path'))

    @classmethod
    def multivalue_model(cls, field):
        pool = Pool()
        if field == 'edocument_sequence':
            return pool.get('stock.configuration.sequence')
        elif field == 'EDI_output_path':
            return pool.get('stock.configuration.edi_output_path')
        return super(Configuration, cls).multivalue_model(field)

    @classmethod
    def default_edocument_sequence(cls, **pattern):
        return cls.multivalue_model(
            'edocument_sequence').default_edocument_sequence()


class ConfigurationSequence:
    __name__ = 'stock.configuration.sequence'
    __metaclass__ = PoolMeta

    edocument_sequence = fields.Many2One('ir.sequence',
        'Electronic Document Sequence', required=True)

    @classmethod
    def __register__(cls, module_name):
        TableHandler = backend.get('TableHandler')
        exist = TableHandler.table_exist(cls._table)
        if exist:
            table = TableHandler(cls, module_name)
            exist &= table.column_exist('edocument_sequence')

        super(ConfigurationSequence, cls).__register__(module_name)

        if not exist:
            # Re-migration
            cls._migrate_property([], [], [])

    @classmethod
    def _migrate_property(cls, field_names, value_names, fields):
        field_names.append('edocument_sequence')
        value_names.append('edocument_sequence')
        super(ConfigurationSequence, cls)._migrate_property(field_names,
            value_names, fields)

    @classmethod
    def default_edocument_sequence(cls):
        pool = Pool()
        ModelData = pool.get('ir.model.data')
        try:
            return ModelData.get_id('edocument_edifact', 'sequence_edocument')
        except KeyError:
            return None


class ConfigurationEDIOutputPath(ModelSQL, CompanyValueMixin):
    """Stock Configuration EDI Output Path"""
    __name__ = 'stock.configuration.edi_output_path'

    EDI_output_path = fields.Char('EDI Output Path')

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

        super(ConfigurationEDIOutputPath, cls).__register__(module_name)

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

    @classmethod
    def _migrate_property(cls, field_names, value_names, fields):
        field_names.append('EDI_output_path')
        value_names.append('EDI_output_path')
        fields.append('company')
        migrate_property('stock.configuration',
            field_names, cls, value_names, fields=fields)


class UnitLoad:
    __metaclass__ = PoolMeta
    __name__ = 'stock.unit_load'

    def get_best_before(self):
        return ''

    def get_sscc(self):
        if self.shipment_out:
            edi_codes = [identifier.code for identifier in
                         self.shipment_out.company.party.identifiers
                         if identifier.type == 'EDI_sender']
            edi_code = edi_codes[0][:6] if edi_codes else '000000'
            code = '00' + edi_code + self.code[-9:].zfill(len(self.code[-9:])-9)
            return code + str(self._sscc_control_digit(code))
        return ''

    def get_grai(self):
        return ''

    @staticmethod
    def _sscc_control_digit(num):
        nums = (int(c) for c in num)
        multipliers = [3, 1]
        return 10 - sum((digit * multipliers[index % 2]
            for index, digit in enumerate(nums))) % 10