from .. import controller
from odoo import http
from odoo.http import request


class Voucher(controller.Controller):
    prefix = '/api/v1/'

    @http.route(prefix + 'user/<user_id>/voucher', auth='public', methods=['GET', 'OPTIONS'])
    @controller.Controller.must_authorized(private=True, private_key='user_id')
    def get_vouchers(self, **kw):
        cart = request.env['website.user.cart']
        code = kw.get('code')
        user_id = kw.get('user_id')
        source = kw.get('source')
        visibility = ['public']

        parameter = []
        if code:
            visibility.append('private')
            parameter += [('code', '=', code)]
        user_pricelist = request.env.user_pricelist
        if user_pricelist:
            parameter += [('excl_pricelist_ids', 'not in', [user_pricelist.id])]

        parameter += [('visibility', 'in', visibility)]
        vouchers = request.env['voucher'].get_active_voucher(parameter)
        vouchers = vouchers.res_format()
        checkout = cart.get_user_checkout(user_id, source=source)

        for voucher in vouchers:
            apply_status = ''
            products = checkout['products']
            min_purchase_amount = voucher['min_purchase_amount']
            can_apply = False
            difference_to_apply = 0

            manufacture_ids = voucher['manufacture_ids']
            subtotal = 0
            has_match_manufacture = False
            for product in products:
                price = product['price']['price']
                price_discount = product['price']['price_discount']
                quantity = product['quantity']
                manufacture_id = product['manufacture']['id'] or False

                if len(manufacture_ids) == 0 or manufacture_id in manufacture_ids:
                    has_match_manufacture = True

                if product['has_flashsale']:
                    continue

                purchase_amt = price * quantity
                discount_amt = (price - price_discount) * quantity
                subtotal += purchase_amt - discount_amt

            has_flashsale_products = any(product['has_flashsale'] for product in products)
            if not has_match_manufacture:
                apply_status = 'UM' # Unqualified Manufacture
            elif subtotal < min_purchase_amount:
                apply_status = 'MPA' # Minimum Purchase Amount
                if has_flashsale_products:
                    apply_status += '-HF' # Has Flashsale
            else:
                can_apply = True

            if subtotal < min_purchase_amount:
                difference_to_apply = min_purchase_amount - subtotal

            obj_voucher = request.env['voucher'].browse(voucher['id'])
            discount_voucher = obj_voucher.calculate_discount(subtotal)

            voucher['can_apply'] = can_apply
            voucher['apply_status'] = apply_status
            voucher['has_flashsale_products'] = has_flashsale_products
            voucher['discount_voucher'] = discount_voucher
            voucher['difference_to_apply'] = difference_to_apply
        
        sorted_vouchers = sorted(vouchers, key=lambda x: x['can_apply'], reverse=True)

        return self.response(sorted_vouchers)