# -*- coding: utf-8 -*-

from odoo.addons.account.tests.account_test_classes import AccountingTestCase
from odoo.exceptions import ValidationError
from odoo.tests import tagged

import time


@tagged('post_install', '-at_install')
class TestAccountInvoiceRounding(AccountingTestCase):

    def setUp(self):
        super(TestAccountInvoiceRounding, self).setUp()
        self.account_receivable = self.env['account.account'].search(
            [('user_type_id', '=', self.env.ref('account.data_account_type_receivable').id)], limit=1)
        self.account_revenue = self.env['account.account'].search(
            [('user_type_id', '=', self.env.ref('account.data_account_type_revenue').id)], limit=1)
        self.fixed_tax = self.env['account.tax'].create({
            'name': 'Test Tax',
            'amount': 0.0,
            'amount_type': 'fixed',
        })

    def create_cash_rounding(self, rounding, method, strategy):
        return self.env['account.cash.rounding'].create({
            'name': 'rounding ' + method,
            'rounding': rounding,
            'account_id': self.account_receivable.id,
            'strategy': strategy,
            'rounding_method': method,
        })

    def create_invoice(self, amount, cash_rounding_id, tax_amount=None):
        """ Returns an open invoice """
        invoice_id = self.env['account.invoice'].create({
            'partner_id': self.env.ref("base.res_partner_2").id,
            'currency_id': self.env.ref('base.USD').id,
            'name': 'invoice test rounding',
            'account_id': self.account_receivable.id,
            'type': 'out_invoice',
            'date_invoice': time.strftime('%Y') + '-06-26',
        })
        if tax_amount:
            self.fixed_tax.amount = tax_amount
        self.env['account.invoice.line'].create({
            'product_id': self.env.ref("product.product_product_4").id,
            'quantity': 1,
            'price_unit': amount,
            'invoice_id': invoice_id.id,
            'name': 'something',
            'account_id': self.account_revenue.id,
            'invoice_line_tax_ids': [(6, 0, [self.fixed_tax.id])] if tax_amount else None
        })
        # Create the tax_line_ids
        invoice_id._onchange_invoice_line_ids()

        # We need to set the cash_rounding_id after the _onchange_invoice_line_ids
        # to avoid a ValidationError from _check_cash_rounding because the onchange
        # are not well triggered in the tests.
        try:
            invoice_id.cash_rounding_id = cash_rounding_id
        except ValidationError:
            pass

        invoice_id._onchange_cash_rounding()
        invoice_id.action_invoice_open()
        return invoice_id

    def _check_invoice_rounding(self, inv, exp_lines_values, exp_tax_values=None):
        inv_lines = inv.invoice_line_ids
        self.assertEquals(len(inv_lines), len(exp_lines_values))
        for i in range(0, len(exp_lines_values)):
            self.assertEquals(inv_lines[i].price_unit, exp_lines_values[i])

        if exp_tax_values:
            tax_lines = inv.tax_line_ids
            self.assertEquals(len(tax_lines), len(exp_tax_values))
            for i in range(0, len(exp_tax_values)):
                self.assertEquals(tax_lines[i].amount_total, exp_tax_values[i])

    def test_rounding_add_invoice_line(self):
        self._check_invoice_rounding(
            self.create_invoice(100.2, self.create_cash_rounding(0.5, 'UP', 'add_invoice_line')),
            [100.2, 0.3]
        )
        self._check_invoice_rounding(
            self.create_invoice(100.9, self.create_cash_rounding(1.0, 'DOWN', 'add_invoice_line')),
            [100.9, -0.9]
        )
        self._check_invoice_rounding(
            self.create_invoice(100.5, self.create_cash_rounding(1.0, 'HALF-UP', 'add_invoice_line')),
            [100.5, 0.5]
        )

    def test_rounding_biggest_tax(self):
        self._check_invoice_rounding(
            self.create_invoice(100.2, self.create_cash_rounding(0.5, 'UP', 'biggest_tax'), 1.0),
            [100.2], [1.3]
        )
        self._check_invoice_rounding(
            self.create_invoice(100.9, self.create_cash_rounding(1.0, 'DOWN', 'biggest_tax'), 2.0),
            [100.9], [1.1]
        )
        self._check_invoice_rounding(
            self.create_invoice(100.5, self.create_cash_rounding(1.0, 'HALF-UP', 'biggest_tax'), 1.0),
            [100.5], [1.5]
        )