<?php
/**
 * CheckoutService.php
 *
 * @copyright  2022 opencart.cn - All Rights Reserved
 * @link       http://www.guangdawangluo.com
 * @author     Edward Yang <yangjin@opencart.cn>
 * @created    2022-06-30 19:37:05
 * @modified   2022-06-30 19:37:05
 */

namespace Beike\Shop\Services;

use Beike\Models\Order;
use Beike\Models\Customer;
use Beike\Repositories\CartRepo;
use Beike\Repositories\OrderRepo;
use Illuminate\Support\Facades\DB;
use Beike\Repositories\PluginRepo;
use Beike\Repositories\AddressRepo;
use Beike\Repositories\CountryRepo;
use Beike\Shop\Http\Resources\Account\AddressResource;
use Beike\Shop\Http\Resources\Checkout\PaymentMethodItem;
use Beike\Shop\Http\Resources\Checkout\ShippingMethodItem;

class CheckoutService
{
    private $customer;
    private $cart;
    private $selectedProducts;


    /**
     * @throws \Exception
     */
    public function __construct($customer = null)
    {
        if (is_int($customer) || empty($customer)) {
            $this->customer = current_customer();
        }
        if (empty($this->customer) || !($this->customer instanceof Customer)) {
            throw new \Exception("购物车客户无效");
        }
        $this->cart = CartRepo::createCart($this->customer);
        $this->selectedProducts = CartRepo::selectedCartProducts($this->customer->id);
        if ($this->selectedProducts->count() == 0) {
            throw new \Exception("购物车商品为空");
        }
    }

    /**
     * 更新结账页数据
     *
     * @param $requestData ['shipping_address_id'=>1, 'payment_address_id'=>2, 'shipping_method'=>'code', 'payment_method'=>'code']
     * @return array
     */
    public function update($requestData): array
    {
        $shippingAddressId = $requestData['shipping_address_id'] ?? 0;
        $shippingMethodCode = $requestData['shipping_method_code'] ?? '';

        $paymentAddressId = $requestData['payment_address_id'] ?? 0;
        $paymentMethodCode = $requestData['payment_method_code'] ?? '';

        if ($shippingAddressId) {
            $this->updateShippingAddressId($shippingAddressId);
        }
        if ($shippingMethodCode) {
            $this->updateShippingMethod($shippingMethodCode);
        }

        if ($paymentAddressId) {
            $this->updatePaymentAddressId($shippingAddressId);
        }
        if ($paymentMethodCode) {
            $this->updatePaymentMethod($paymentMethodCode);
        }
        return $this->checkoutData();
    }


    /**
     * 确认提交订单
     * @throws \Throwable
     */
    public function confirm(): Order
    {
        $customer = current_customer();
        $checkoutData = self::checkoutData();
        $checkoutData['customer'] = $customer;

        try {
            DB::beginTransaction();
            $order = OrderRepo::create($checkoutData);
            CartRepo::clearSelectedCartProducts($customer);
            DB::commit();
        } catch (\Exception $e) {
            DB::rollBack();
            throw $e;
        }
        return $order;
    }


    private function updateShippingAddressId($shippingAddressId)
    {
        $this->cart->update(['shipping_address_id' => $shippingAddressId]);
    }

    private function updatePaymentAddressId($paymentAddressId)
    {
        $this->cart->update(['payment_address_id' => $paymentAddressId]);
    }

    private function updateShippingMethod($shippingMethodCode)
    {
        $this->cart->update(['shipping_method_code' => $shippingMethodCode]);
    }

    private function updatePaymentMethod($paymentMethodCode)
    {
        $this->cart->update(['payment_method_code' => $paymentMethodCode]);
    }

    /**
     * 获取结账页数据
     *
     * @return array
     */
    public function checkoutData(): array
    {
        $customer = $this->customer;
        $addresses = AddressRepo::listByCustomer($customer);
        $shipments = ShippingMethodItem::collection(PluginRepo::getShippingMethods())->jsonSerialize();
        $payments = PaymentMethodItem::collection(PluginRepo::getPaymentMethods())->jsonSerialize();

        $cartList = CartService::list($customer, true);
        $carts = CartService::reloadData($cartList);
        $totalService = (new TotalService($cartList))->setShippingMethod($this->cart->shipping_method_code);

        $data = [
            'current' => [
                'shipping_address_id' => $this->cart->shipping_address_id,
                'shipping_method_code' => $this->cart->shipping_method_code,
                'payment_address_id' => $this->cart->payment_address_id,
                'payment_method_code' => $this->cart->payment_method_code,
            ],
            'country_id' => (int)system_setting('base.country_id'),
            'customer_id' => $customer->id ?? null,
            'countries' => CountryRepo::all(),
            'addresses' => AddressResource::collection($addresses),
            'shipping_methods' => $shipments,
            'payment_methods' => $payments,
            'carts' => $carts,
            'totals' => $totalService->getTotals(),
        ];

        return hook_filter('checkout.data', $data);
    }
}