# 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.pool import PoolMeta
from trytond.model import fields, Workflow, ModelView
from trytond.pyson import Eval, Bool
from trytond.i18n import gettext
from trytond.model.exceptions import AccessError
from trytond.pool import Pool


class Invoice(metaclass=PoolMeta):
    __name__ = 'account.invoice'
    position = fields.Char('Position', states={'invisible': Eval('type') != 'out'})
    turn = fields.Integer('Turn', states={'invisible': Eval('type') != 'out'})

    @classmethod
    def __setup__(cls):
        super(Invoice, cls).__setup__()
        cls.party.states['readonly'] = Bool(Eval('number'))
        if 'turn' not in cls._check_modify_exclude:
            cls._check_modify_exclude.add('turn')

    @classmethod
    @ModelView.button
    @Workflow.transition('cancelled')
    def cancel(cls, invoices):
        pool = Pool()
        Move = pool.get('account.move')
        Line = pool.get('account.move.line')

        cancel_moves = []
        delete_moves = []
        to_save = []
        for invoice in invoices:
            if invoice.move:
                if invoice.move.state == 'draft':
                    delete_moves.append(invoice.move)
                elif not invoice.cancel_move:
                    if (invoice.type == 'out'
                            and not invoice.company.cancel_invoice_out):
                        raise AccessError(
                            gettext('account_invoice.msg_invoice_customer_cancel_move',
                                invoice=invoice.rec_name))
                    invoice.cancel_move = invoice.move.cancel()
                    to_save.append(invoice)
                    cancel_moves.append(invoice.cancel_move)
        if cancel_moves:
            Move.save(cancel_moves)
        cls.save(to_save)
        if delete_moves:
            Move.delete(delete_moves)
        if cancel_moves:
            Move.post(cancel_moves)
        # Write state before reconcile to prevent invoice to go to paid state
        cls.write(invoices, {
                'state': 'cancelled',
                })

        for invoice in invoices:
            if not invoice.move or not invoice.cancel_move:
                continue
            to_reconcile = []
            for line in invoice.move.lines + invoice.cancel_move.lines:
                if line.account == invoice.account:
                    to_reconcile.append(line)
            Line.reconcile(to_reconcile)

        cls._clean_payments(invoices)