# 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 itertools import groupby
from operator import itemgetter

from sql.operators import Concat

from trytond.i18n import gettext
from trytond.model import ModelView
from trytond.pool import PoolMeta, Pool
from trytond.transaction import Transaction
from trytond.tools import grouped_slice, reduce_ids

from trytond.modules.account.exceptions import PostError


class Journal(metaclass=PoolMeta):
    __name__ = 'account.journal'

    @classmethod
    def __setup__(cls):
        super(Journal, cls).__setup__()
        cls.type.selection.append(('statement', "Statement"))


class Move(metaclass=PoolMeta):
    __name__ = 'account.move'

    @classmethod
    def __register__(cls, module_name):
        pool = Pool()
        StatementLine = pool.get('account.statement.line')
        cursor = Transaction().connection.cursor()
        sql_table = cls.__table__()

        super(Move, cls).__register__(module_name)

        # Migration from 3.4:
        # account.statement.line origin changed to account.statement
        statement_line = StatementLine.__table__()
        cursor.execute(*sql_table.join(statement_line,
                condition=(
                    Concat(StatementLine.__name__ + ',', statement_line.id)
                    == sql_table.origin
                    )
                ).select(sql_table.id, statement_line.statement,
                order_by=(sql_table.id, statement_line.statement)))
        for statement_id, values in groupby(cursor, itemgetter(1)):
            ids = [x[0] for x in values]
            for sub_ids in grouped_slice(ids):
                red_sql = reduce_ids(sql_table.id, sub_ids)
                cursor.execute(*sql_table.update(
                        columns=[sql_table.origin],
                        values=['account.statement,%s' % statement_id],
                        where=red_sql))

    @classmethod
    def _get_origin(cls):
        return super(Move, cls)._get_origin() + ['account.statement']

    @classmethod
    @ModelView.button
    def post(cls, moves):
        pool = Pool()
        Statement = pool.get('account.statement')
        for move in moves:
            if (isinstance(move.origin, Statement)
                    and move.origin.state != 'posted'):
                raise PostError(
                    gettext('account_statement.msg_post_statement_move',
                        move=move.rec_name,
                        statement=move.origin.rec_name))
        super().post(moves)


class MoveLine(metaclass=PoolMeta):
    __name__ = 'account.move.line'

    @classmethod
    def _get_origin(cls):
        return super()._get_origin() + ['account.statement.line']