# -*- coding: utf-8 -*-
# Part of Odoo. See LICENSE file for full copyright and licensing details.
from odoo import tools
from odoo.tests import common, Form
from odoo.modules.module import get_resource_path


class TestProductMargin(common.TransactionCase):

    def create_account_invoice(self, invoice_type, partner, product, quantity=0.0, price_unit=0.0):
        """ Create an invoice as in a view by triggering its onchange methods"""

        invoice_form = Form(self.env['account.invoice'].with_context(type=invoice_type))
        invoice_form.partner_id = partner
        with invoice_form.invoice_line_ids.new() as line:
            line.product_id = product
            line.quantity = quantity
            line.price_unit = price_unit

        invoice = invoice_form.save()
        invoice.action_invoice_open()
        return invoice

    def test_product_margin(self):
        ''' In order to test the product_margin module '''

        # load account_minimal_test.xml file for chart of account in configuration
        tools.convert_file(self.cr, 'product_margin',
                           get_resource_path('account', 'test', 'account_minimal_test.xml'),
                           {}, 'init', False, 'test', self.registry._assertion_report)

        supplier = self.env['res.partner'].create({'name': 'Supplier', 'supplier': True})
        customer = self.env['res.partner'].create({'name': 'Customer', 'customer': True})
        ipad = self.env.ref("product.product_product_4")

        # Create supplier invoice and customer invoice to test product margin.
        # Define supplier invoices
        self.create_account_invoice('in_invoice', supplier, ipad, 10.0, 300.00)
        self.create_account_invoice('in_invoice', supplier, ipad, 4.0, 450.00)
        # Define Customer Invoices
        self.create_account_invoice('out_invoice', customer, ipad, 20.0, 750.00)
        self.create_account_invoice('out_invoice', customer, ipad, 10.0, 550.00)

        result = ipad._compute_product_margin_fields_values()

        # Sale turnover ( Quantity * Price Subtotal / Quantity)
        sale_turnover = ((20.0 * 750.00) + (10.0 * 550.00))

        # Expected sale (Total quantity * Sale price)
        sale_expected = (750.00 * 30.0)

        # Purchase total cost (Quantity * Unit price)
        purchase_total_cost = ((10.0 * 300.00) + (4.0 * 450.00))

        # Purchase normal cost ( Total quantity * Cost price)
        purchase_normal_cost = (14.0 * 500.00)

        total_margin = sale_turnover - purchase_total_cost
        expected_margin = sale_expected - purchase_normal_cost

        # Check total margin
        self.assertEqual(result[ipad.id]['total_margin'], total_margin, "Wrong Total Margin.")

        # Check expected margin
        self.assertEqual(result[ipad.id]['expected_margin'], expected_margin, "Wrong Expected Margin.")