def resolve_warehouse(doc, method=None):
    customer_doc = frappe.get_doc('Customer', doc.customer)
    territory_warehouse = frappe.get_doc('Territory', customer_doc.territory).warehouse

    for item in doc.items:
        default_warehouse = item.warehouse
        qty = item.qty

        # If the sales order is under any company other than XXXXXXXXXX
        # then skip warehouse resolution. This is because for the time being all inventory
        # will remain in the ownership of XXXXXXXXXX until sold by the other company.
        if doc.company != 'XXXXXXXXXX':
            break

        # Get warehouse in relation with customer territory.
        lft, rgt = frappe.db.get_value('Warehouse', territory_warehouse, ['lft', 'rgt'])
        sql = """SELECT warehouse, actual_qty qty FROM tabBin WHERE item_code=%s AND
        exists(SELECT name FROM tabWarehouse wh WHERE wh.name = tabBin.warehouse AND wh.lft >= %s AND wh.rgt <= %s)
        AND actual_qty > 0
        ORDER BY warehouse ASC;"""
        values = [item.item_code, lft, rgt]
        warehouse_list = frappe.db.sql(sql, values, as_dict=True)
        warehouse_names = []
        for w in warehouse_list:
            warehouse_names.append(w.warehouse)

        backup_warehouse = None
        for result in warehouse_list:
            if qty <= result.qty:
                backup_warehouse = result.warehouse
                break

        if default_warehouse in warehouse_names:
            if qty <= get_latest_stock_qty(warehouse=default_warehouse, item_code=item.item_code):
                continue

        if backup_warehouse:
            item.warehouse = backup_warehouse
            continue

        item.warehouse = 'XXXXXXX - LAST RESORT WAREHOUSE - XXXXXX'