from odoo.tests.common import TransactionCase
from odoo import fields
from datetime import timedelta

class TestStockBackdate(TransactionCase):

    def setUp(self):
        super(TestStockBackdate, self).setUp()
        self.product = self.env['product.product'].create({
            'name': 'Test Product Backdate',
            'type': 'product',
            'categ_id': self.env.ref('product.product_category_all').id,
        })
        # Enable automated valuation for the category
        self.product.categ_id.property_valuation = 'real_time'
        self.product.categ_id.property_cost_method = 'average'
        
        self.stock_location = self.env.ref('stock.stock_location_stock')

    def test_inventory_backdate(self):
        """Test that backdated inventory adjustment works"""
        backdate = fields.Datetime.now() - timedelta(days=10)
        
        # Create backdated inventory adjustment
        inventory = self.env['stock.inventory.backdate'].create({
            'backdate_datetime': backdate,
            'location_id': self.stock_location.id,
        })
        
        # Add inventory line
        line = self.env['stock.inventory.backdate.line'].create({
            'inventory_id': inventory.id,
            'product_id': self.product.id,
            'theoretical_qty': 0,
            'counted_qty': 100,
        })
        
        # Validate the adjustment
        inventory.action_validate()
        
        # Check stock move date
        move = self.env['stock.move'].search([
            ('product_id', '=', self.product.id),
            ('is_inventory', '=', True),
            ('origin', '=', inventory.name)
        ], limit=1)
        
        self.assertTrue(move, "Stock move should be created")
        self.assertEqual(move.date, backdate, "Stock move date should be backdated")
        
        # Check account move date if exists
        if move.account_move_ids:
            # Account move date is a Date field, so compare date parts
            self.assertEqual(move.account_move_ids[0].date, backdate.date(), "Account move date should be backdated")
            
        # Check valuation layer date (create_date)
        svl = self.env['stock.valuation.layer'].search([
            ('stock_move_id', '=', move.id)
        ], limit=1)
        
        if svl:
            # Both are datetime now, so we can compare directly
            self.assertEqual(svl.create_date, backdate, "SVL create_date should be backdated")