# This file is part of Tryton.  The COPYRIGHT file at the top level of
# this repository contains the full copyright notices and license terms.
import operator
from decimal import Decimal

from trytond.i18n import gettext
from trytond.pool import Pool, PoolMeta
from trytond.transaction import Transaction
from trytond.exceptions import UserWarning, UserError
from .exceptions import COGSWarning
import logging

logger = logging.getLogger(__name__)


class InvoiceLine(metaclass=PoolMeta):
    __name__ = 'account.invoice.line'

    def _get_anglo_saxon_move_lines(self, amount, type_):
        '''
        Return account move for anglo-saxon stock accounting
        '''
        pool = Pool()
        MoveLine = pool.get('account.move.line')
        Currency = pool.get('currency.currency')
        Date = Pool().get('ir.date')
        AccountConfiguration = Pool().get('account.configuration')
        account_configuration = AccountConfiguration(1)
        
        assert type_.startswith('in_') or type_.startswith('out_'), \
            'wrong type'

        result = []
        move_line = MoveLine()
        move_line.description = self.description
        move_line.amount_second_currency = None
        move_line.second_currency = None

        move_line.lot = self.lot
        amount_converted = amount
        if self.invoice.currency != self.invoice.company.currency and type_ == 'in_supplier':
            if account_configuration.stock_fx_forex == 'forex':
                frate,amt = move_line.lot.get_forex_rate(amount)
                logger.info("GET_PARTY_LINE:%s",frate)
                if frate > 0:
                    amount = round(frate * amount,2)
                    logger.info("GET_PARTY_LINE2:%s",amount)
                    with Transaction().set_context(date=Date.today()):
                        amount += Currency.compute(self.invoice.currency,
                            amt, self.invoice.company.currency)
                    logger.info("GET_PARTY_LINE3:%s",amount)
                    amount_converted = round(amount,2)
                else:
                    if self.invoice.rate:
                        amount_converted = round(amount / self.invoice.rate,2)
                    else:
                        with Transaction().set_context(date=self.invoice.currency_date):
                            amount_converted = Currency.compute(self.invoice.currency,
                                amount, self.invoice.company.currency)
            else:
                if self.invoice.rate:
                    amount_converted = round(amount / self.invoice.rate,2)
                else:
                    with Transaction().set_context(date=self.invoice.currency_date):
                        amount_converted = Currency.compute(self.invoice.currency,
                            amount, self.invoice.company.currency)
            move_line.second_currency = self.invoice.currency
                
        if amount_converted < 0:
            if type_.startswith('in_'):
                move_line.debit = Decimal(0)
                move_line.credit = -amount_converted
                move_line.account = self.product.account_stock_in_used
                if move_line.second_currency:
                    move_line.amount_second_currency = amount
            else:
                move_line.debit = -amount_converted
                move_line.credit = Decimal(0)
                move_line.account = self.product.account_stock_out_used
                if move_line.second_currency:
                    move_line.amount_second_currency = amount
        else:
            if type_.startswith('in_'):
                move_line.debit = amount_converted
                move_line.credit = Decimal(0)
                move_line.account = self.product.account_stock_in_used
                if move_line.second_currency:
                    move_line.amount_second_currency = amount
            else:
                move_line.debit = Decimal(0)
                move_line.credit = amount_converted
                move_line.account = self.product.account_stock_out_used
                if move_line.second_currency:
                    move_line.amount_second_currency = -amount

        logger.info("_GET_ANGLO_MOVE_LINE_ACCOUNT1:%s",move_line.account)
        result.append(move_line)
        debit, credit = move_line.debit, move_line.credit
        move_line = MoveLine()
        move_line.lot = self.lot
        move_line.description = self.description
        #move_line.amount_second_currency = move_line.second_currency = None
        move_line.debit, move_line.credit = credit, debit
        if type_.endswith('supplier'):
            move_line.account = self.account
        else:
            move_line.account = self.product.account_cogs_used
        logger.info("_GET_ANGLO_MOVE_LINE_ACCOUNT2:%s",move_line.account)
        if move_line.account.party_required:
            move_line.party = self.invoice.party
        result.append(move_line)
        return result

    def get_move_lines(self):
        pool = Pool()
        Move = pool.get('stock.move')
        Period = pool.get('account.period')
        Warning = pool.get('res.user.warning')

        logger.info("ENTERING_ANGLO_SAXON_GET_MOVE_LINES:%s",self)

        result = super(InvoiceLine, self).get_move_lines()

        if self.type != 'line':
            return result
        if not self.product:
            return result
        if self.product.type != 'goods' and not self.product.landed_cost:
            return result

        accounting_date = (self.invoice.accounting_date
            or self.invoice.invoice_date)
        period = Period.find(self.invoice.company, date=accounting_date)
        if period.fiscalyear.account_stock_method != 'anglo_saxon':
            return result

        # an empty list means we'll use the current cost price
        moves = []
        for move in self.stock_moves:
            if move.state != 'done':
                continue
            # remove move for different product
            if move.product != self.product:
                warning_name = '%s.stock.different_product' % self
                if Warning.check(warning_name):
                    raise COGSWarning(warning_name,
                        gettext('account_stock_anglo_saxon'
                            '.msg_invoice_line_stock_move_different_product',
                            line=self.rec_name,
                            product=self.product.rec_name))
            else:
                moves.append(move)

        if self.invoice.type == 'in':
            type_ = 'in_supplier'
        elif self.invoice.type == 'out':
            type_ = 'out_customer'
        # if self.quantity < 0:
        #     direction, target = type_.split('_')
        #     if direction == 'in':
        #         direction = 'out'
        #     else:
        #         direction = 'in'
        #     type_ = '%s_%s' % (direction, target)

        # moves.sort(key=operator.attrgetter('effective_date'))
        # cost = Move.update_anglo_saxon_quantity_product_cost(
        #     self.product, moves, abs(self.quantity), self.unit, type_)
        # cost = self.invoice.company.currency.round(cost)
        if type_ == 'in_supplier':
            cost = self.amount
        else:
            cost = self.lot.get_cog()
            if not cost or cost == 0:
                raise UserError('No COG for this invoice, please generate the reception of the goods') 
            if self.amount < 0 :
                cost *= -1
        logger.info("GETMOVELINES_COST:%s",cost)
        anglo_saxon_move_lines_ = []
        with Transaction().set_context(
                company=self.invoice.company.id, date=accounting_date):
            anglo_saxon_move_lines = self._get_anglo_saxon_move_lines(
                cost, type_)
            lot_has_sale_invoice = (
                self.lot
                and (self.lot.sale_invoice_line_prov
                    or self.lot.sale_invoice_line))
            if type_ == 'in_supplier' and lot_has_sale_invoice and not self.fee:
                anglo_saxon_move_lines_ = self._get_anglo_saxon_move_lines(cost, 'out_customer')
        result.extend(anglo_saxon_move_lines)
        result.extend(anglo_saxon_move_lines_)
        #Fee inventoried delivery management
        if self.lot and type_ != 'in_supplier':
            FeeLots = Pool().get('fee.lots')
            fees = FeeLots.search(['lot','=',self.lot.id])
            for fl in fees:
                if fl.fee.type == 'ordered' and fl.fee.product.template.landed_cost:
                    AccountMove = Pool().get('account.move')
                    account_move = fl.fee._get_account_move_fee(fl.lot,'out')
                    AccountMove.save([account_move])

        return result