<?php

namespace App\Endpoint\Api\Http\Controllers\Order;

use App\Endpoint\Api\Http\Controllers\Controller;
use App\Endpoint\Api\Http\Resources\OrderPreResource;
use Illuminate\Http\Request;
use App\Models\{Order, OrderPre, ProductSku};
use App\Models\Store\Store;
use App\Services\OrderService;
use Illuminate\Support\Facades\DB;
use App\Exceptions\BizException;
use Throwable;
use EasyWeChat\Kernel\Http\StreamResponse;

class OrderPreController extends Controller
{
    public function store(Request $request)
    {
        $user = $request->user();
        if (!$user->userInfo->is_company) {
            throw new BizException('非内部员工' . $user->id);
        }
        $request->validate([
            'store_id' => 'required',
            'products' => 'required|array',
            'products.*.sku_id' => 'required',
            'products.*.quantity' => 'required',
            'products.*.send' => 'required',
        ], [
            'store_id.required' => '店铺ID必须',
            'products.required' => '未选择商品'
        ]);

        // 验证商品是否属于该店铺
        $store = Store::findOrFail($request->input('store_id'));

        $products = $request->input('products');
        foreach($products as $item) {
            $quantity = $item['quantity'];
            $send = $item['send'];
            $sku_id = $item['sku_id'];

            // 验证商品是否属于该店铺
            $store_product = $store->productSkus()->wherePivot('product_sku_id', $sku_id)->first();
            if (!$store_product) {
                throw new BizException('店铺未出售商品: ' . $sku_id);
            }

            // 验证商品是否可销售
            if (!$store_product->pivot->status) {
                throw new BizException('店铺已下架商品: ' . $sku_id);
            }

            // 验证商品库存(店铺库存)
            if ($store_product->pivot->amount < $send) {
                throw new BizException('店铺商品: ' . $store_product->name . ' 库存不足');
            }

            // 验证商品的购买数量 大于 发货数量
            if ($send > $quantity) {
                throw new BizException('商品购买数量大于发货数量, ' . $sku_id);
            }
        }

        $order_pre = OrderPre::create([
            'user_id' => $user->id,
            'store_id' => $store->id,
            'products' => $request->input('products'),
            'remarks' => $request->input('remarks'),
            'others' => [
                'coupon_id' => $request->input('coupon_id'),
                'note' => $request->input('note')
            ]
        ]);

        $app = $this->getWechatApp();


        $scene = http_build_query([
            'order_pre' =>  $order_pre->id,
            'invite_code' => $user->userInfo->code,
        ]);

        $response = $app->app_code->getUnlimit($scene, [
            'page'  => 'pages/welcome/index',
            'check_path' => false,
            // develop: 开发版, trial: 体验版
            'env_version' => app()->isProduction() ? 'release' : $request->input('env_version', 'trial'),
            'width' => $request->input('width', 200),
        ]);

        if ($response instanceof StreamResponse) {
            return response()->json([
                'order_pre' => $order_pre->id,
                'image' => 'data:image/png;base64,'.base64_encode($response->getBody()),
            ]);
        }

        throw new BizException('生成失败, 请稍后再试');
    }

    public function show($id)
    {
        $info = OrderPre::findOrFail($id);

        return OrderPreResource::make($info);
    }

    public function storeOrder(Request $request)
    {
        $id = $request->input('id');
        $order_pre = OrderPre::findOrFail($id);
        $user = $request->user();

        try {
            DB::beginTransaction();
            $service = new OrderService();
            // 如果还有未支付的订单, 则不生成新订单
            $order = $user->orders()->where([
                'source_type' => OrderPre::class,
                'source_id' => $order_pre->id,
                'status' => Order::STATUS_PENDING,
            ])->first();
            if (!$order) {
                $order = $service->createOrderByPre($user, $order_pre);
            }

            DB::commit();
            return response()->json([
                'order_id' => $order->id
            ]);
        } catch (Throwable $e) {
            DB::rollBack();

            report($e);

            throw new BizException($e->getMessage());
        }
    }

    protected function getWechatApp($getway = 'default')
    {
        return \EasyWeChat\Factory::miniProgram(config('wechat.mini_program.' . $getway));
    }
}