# 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, fields
from trytond.pool import Pool, PoolMeta
from trytond.pyson import Bool, Eval
from trytond.transaction import Transaction


class Agent(metaclass=PoolMeta):
    __name__ = 'commission.agent'
    waiting_account = fields.Many2One('account.account', 'Waiting Account',
        domain=[
            ('type', '!=', None),
            ('closed', '!=', True),
            ('company', '=', Eval('company')),
            ],
        help="The account the agent's waiting commission amounts are posted "
        "to.")


class Commission(metaclass=PoolMeta):
    __name__ = 'commission'
    waiting_move = fields.Many2One(
        'account.move', "Waiting Move", readonly=True)

    @classmethod
    def __setup__(cls):
        super(Commission, cls).__setup__()
        cls.amount.states['readonly'] |= Bool(Eval('waiting_move'))

    @classmethod
    def copy(cls, commissions, default=None):
        if default is None:
            default = {}
        else:
            default = default.copy()
        default.setdefault('waiting_move', None)
        return super(Commission, cls).copy(commissions, default=default)

    @classmethod
    @ModelView.button
    def create_waiting_move(cls, commissions):
        pool = Pool()
        Move = pool.get('account.move')
        Commission = pool.get('commission')
        moves = []
        for commission in commissions:
            move = commission.get_move()
            if move:
                moves.append(move)
            commission.waiting_move = move

        Move.save(moves)
        Commission.save(commissions)

    def get_move(self, date=None):
        pool = Pool()
        Move = pool.get('account.move')
        Line = pool.get('account.move.line')
        Date = pool.get('ir.date')
        Period = pool.get('account.period')
        Currency = pool.get('currency.currency')

        if not self.agent.waiting_account:
            return
        if self.waiting_move:
            return self.waiting_move

        if date is None:
            with Transaction().set_context(company=self.agent.company.id):
                date = Date.today()
        period = Period.find(self.agent.company, date=date)

        move = Move(journal=self.get_journal(), origin=self,
            date=date, period=period, company=self.agent.company)
        amount = Currency.compute(self.currency, self.amount,
            self.agent.company.currency)
        line = Line()
        with Transaction().set_context(date=date):
            if self.type_ == 'in':
                line.credit = amount if amount > 0 else 0
                line.debit = amount if amount < 0 else 0
                line.account = self.product.account_revenue_used
            else:
                line.debit = amount if amount > 0 else 0
                line.credit = amount if amount < 0 else 0
                line.account = self.product.account_expense_used
        if line.account.party_required:
            line.party = self.agent.party
        # XXX second currency?
        counterpart = Line()
        counterpart.debit, counterpart.credit = line.credit, line.debit
        counterpart.account = self.agent.waiting_account
        if counterpart.account.party_required:
            counterpart.party = self.agent.party
        move.lines = (line, counterpart)
        return move