<?php

namespace App\Endpoint\Api\Http\Controllers;

use App\Endpoint\Api\Http\Resources\DrawActivityResource;
use App\Endpoint\Api\Http\Resources\DrawLogResource;
use App\Enums\DrawPrizeType;
use App\Exceptions\BizException;
use App\Models\DrawActivity;
use App\Models\DrawLog;
use App\Models\DrawTicket;
use App\Services\DrawActivityService;
use Illuminate\Contracts\Cache\LockTimeoutException;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Cache;
use Illuminate\Support\Facades\DB;
use Throwable;

class DrawActivityController extends Controller
{
    public function show($id, Request $request)
    {
        $drawActivity = DrawActivity::with(['prizes' => function ($builder) {
            $builder->latest('sort');
        }])->onlyPublished()->findOrFail($id);

        $drawTicket = null;
        $drawLog = null;

        if ($user = $request->user()) {
            // 当前用户的抽奖机会
            $drawTicket = DrawTicket::where('draw_activity_id', $drawActivity->id)
                ->where('user_id', $user->id)
                ->first();

            // 当前用户未填写收货地址的实物奖品
            $drawLog = DrawLog::whereRelation('prize', 'type', DrawPrizeType::Goods->value)
                ->where('draw_activity_id', $drawActivity->id)
                ->where('user_id', $user->id)
                ->whereNull('consignee_name')
                ->first();
        }

        return response()->json([
            'draw_activity' => DrawActivityResource::make($drawActivity),
            'draw_log_id' => $drawLog?->id,
            'draw_tickets_number' => (int) $drawTicket?->number,
        ]);
    }

    public function draw($id, Request $request, DrawActivityService $drawActivityService)
    {
        $drawActivity = DrawActivity::onlyPublished()->findOrFail($id);

        $lock = Cache::lock("draw_activity_{$drawActivity->id}", 5);

        $user = $request->user();

        try {
            $lock->block(3);

            DB::beginTransaction();

            $drawLog = $drawActivityService->draw($drawActivity, $user);

            DB::commit();
        } catch (Throwable $e) {
            DB::rollBack();

            if ($e instanceof LockTimeoutException) {
                $e = new BizException('抽奖人数较多，请稍后');
            }

            throw $e;
        } finally {
            $lock?->release();
        }

        return DrawLogResource::make($drawLog);
    }
}