<?php

namespace App\Endpoint\Api\Http\Controllers;

use App\Endpoint\Api\Http\Controllers\Controller;
use App\Endpoint\Api\Http\Resources\OfflineOrderPreviewResource;
use App\Exceptions\BizException;
use App\Models\OfflineOrderPreview;
use App\Models\Store\Store;
use App\Models\UserCoupon;
use EasyWeChat\Factory;
use EasyWeChat\Kernel\Http\StreamResponse;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Storage;

class OfflineOrderPreviewController extends Controller
{
    public function index(Request $request)
    {
        $user = $request->user();
        $query = OfflineOrderPreview::query()->with(['store', 'coupon', 'order'])->where('staff_id', $user->id)->orderBy('created_at', 'desc');
        $list = $query->paginate($request->input('per_page'));

        return OfflineOrderPreviewResource::collection($list);
    }

    public function detail(string $id)
    {
        $info = OfflineOrderPreview::with(['store', 'coupon', 'order.user'])->findOrFail($id);
        return OfflineOrderPreviewResource::make($info);
    }

    public function store(Request $request)
    {
        $request->validate([
            'store_id' => ['bail', 'required', 'int'],
            'items' => ['bail', 'required', 'array'],
            'items.*.product_category_id' => ['bail', 'required', 'int'],
            'items.*.products_total_amount' => ['bail', 'required', 'numeric', 'min:0', 'regex:/^([1-9]\d*|0)(\.\d{1,2})?$/'],
            'items.*.discount' => ['bail', 'nullable', 'numeric', 'gt:0', 'lt:10', 'regex:/^[0-9](\.\d{1,2})?$/'],
        ]);

        $user = $request->user();

        if (! $user->userInfo->is_company) {
            throw new BizException('非内部员工');
        }

        $store = Store::findOrFail($request->input('store_id'));
        $couponId = $request->input('coupon_id');
        $userId = $request->input('user_id');
        $coupon = null;
        $couponDiscount = 0;
        if ($couponId) {
            $coupon = UserCoupon::query()->onlyAvailable()->find($couponId);
            if (!$coupon) {
                throw new BizException('优惠券不可用');
            }
            $userId = $coupon->user_id;
        }
        $items = $request->input('items');
        $totalAmount = 0;
        $paymentAmount = 0;
        $discountAmount = 0;
        foreach($items as $item) {
            $totalAmount += $item['products_total_amount'];
            $paymentAmount += bcmul($item['products_total_amount'], $item['discount'] / 10, 2);
        }
        $discountAmount = bcsub($totalAmount, $paymentAmount, 2);
        if ($coupon) {
            $couponDiscount = bcdiv($coupon->getDiscountAmount($paymentAmount), 100, 2);
            $paymentAmount = bcsub($paymentAmount, $couponDiscount, 2);
        }

        $preview = OfflineOrderPreview::create([
            'store_id' => $store->id,
            'staff_id' => $user->id,
            'payload' => ['items' => $items, 'total_amount' => $totalAmount, 'discount_amount' => $discountAmount, 'coupon_discount' => $couponDiscount, 'payment_amount' => $paymentAmount],
            'remark' => $request->input('remark'),
            'user_id' => $userId,
            'coupon_id' => $couponId,
        ]);

        if (config('app.env') != "local") {
            $scene = http_build_query([
                'oo' => $preview->id,
                'i' => $user->userInfo->code,
            ]);
    
            // 生成小程序码
            $app = Factory::miniProgram(config('wechat.mini_program.default'));
    
            $response = $app->app_code->getUnlimit($scene, [
                'page'  => 'pages/welcome/index',
                'check_path' => false,
                'env_version' => app()->isProduction() ? 'release' : $request->input('env_version', 'trial'),
                'width' => $request->input('width', 200),
            ]);
    
            // 保存小程序码
            if ($response instanceof StreamResponse) {
                $directory = 'offline-order-preview';
                $filename = "{$preview->id}.png";
    
                $disk = Storage::disk('public');
    
                $response->save($disk->path($directory), $filename);
    
                $preview->update(['qrcode' => $disk->url("{$directory}/{$filename}")]);
    
                return response()->json([
                    'id' => $preview->id,
                    'qrcode' => $preview->qrcode,
                ]);
            }
    
            logger('offline_order_preview 小程序码生成失败', $response);
    
            throw new BizException('生成失败, 请重试');
        }

        return response()->json([
            'id' => $preview->id,
            'qrcode' => asset("images/logo.png")
        ]);

    }

    public function show($id)
    {
        $preview = OfflineOrderPreview::findOrFail($id);

        return response()->json([
            'id' => $preview->id,
            'qrcode' => $preview->qrcode,
        ]);
    }
}