<?php

/**
 * 文件功能：猜谜活动控制器
 *
 * 负责兼容现有 idiom-quiz 路由，同时支持猜成语与脑筋急转弯
 * 两类题型的开题、答题与当前回合查询。
 */

namespace App\Http\Controllers;

use App\Events\RiddleGameAnswered;
use App\Models\GameConfig;
use App\Models\Riddle;
use App\Models\RiddleGameRound;
use App\Services\RiddleGameService;
use App\Services\UserCurrencyService;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Auth;
use Illuminate\Support\Facades\Redis;

/**
 * 类功能：处理猜谜活动开题、答题和当前回合读取。
 */
class RiddleQuizController extends Controller
{
    /**
     * 方法功能：注入猜谜活动所需的服务。
     */
    public function __construct(
        private readonly RiddleGameService $riddleGameService,
        private readonly UserCurrencyService $currencyService,
    ) {}

    /**
     * 方法功能：管理员手动为指定房间与题型发起一轮猜谜活动。
     */
    public function start(Request $request): JsonResponse
    {
        $user = Auth::user();

        // 仅站长或具备后台职务的管理用户可手动开题。
        if (! $user || ($user->id !== 1 && ! $request->user()?->activePosition)) {
            return response()->json(['status' => 'error', 'message' => '无权限'], 403);
        }

        $roomId = (int) $request->input('room_id', 0);
        // 兼容后台新字段 quiz_type 与旧字段 type，两边都允许触发手动出题。
        $quizType = $this->riddleGameService->normalizeQuizType($request->input('quiz_type', $request->input('type', Riddle::TYPE_IDIOM)));
        if ($roomId <= 0) {
            return response()->json(['status' => 'error', 'message' => '缺少房间 ID'], 422);
        }

        // 猜谜活动总开关关闭时，直接返回明确提示，避免误报成“题库为空”。
        if (! GameConfig::isEnabled(Riddle::TYPE_IDIOM)) {
            return response()->json([
                'status' => 'error',
                'message' => '猜谜活动未开启，请先到游戏管理中开启后再出题。',
            ], 400);
        }

        // 后台手动出题允许覆盖当前同题型回合，避免管理员还要先人工结束上一题。
        $this->riddleGameService->endActiveRoundsForRoom($roomId, $quizType);

        $round = $this->riddleGameService->startRound($roomId, $quizType);
        if (! $round) {
            if (! $this->riddleGameService->pickRandomQuestion($quizType)) {
                return response()->json(['status' => 'error', 'message' => '当前题型题库中没有可用题目，请先在后台添加。'], 400);
            }

            return response()->json(['status' => 'error', 'message' => '当前题型暂时无法出题，请检查游戏配置与参与房间设置。'], 400);
        }

        return response()->json([
            'status' => 'success',
            'data' => [
                'quiz_type' => $round->quiz_type,
                'quiz_type_label' => $this->riddleGameService->getQuizTypeLabel($round->quiz_type),
                'round_id' => $round->id,
                'quiz_round_id' => $round->id,
                'hint' => $round->idiom?->hint ?? '',
                'quiz_hint' => $round->idiom?->hint ?? '',
                'reward_gold' => $round->reward_gold,
                'reward_exp' => $round->reward_exp,
                'quiz_reward_gold' => $round->reward_gold,
                'quiz_reward_exp' => $round->reward_exp,
            ],
        ]);
    }

    /**
     * 方法功能：提交当前猜谜活动回合的答案。
     */
    public function answer(Request $request): JsonResponse
    {
        $user = Auth::user();
        if (! $user) {
            return response()->json(['status' => 'error', 'message' => '请先登录'], 401);
        }

        $roundId = (int) $request->input('round_id');
        $roomId = (int) $request->input('room_id');
        $quizType = $this->riddleGameService->normalizeQuizType($request->input('quiz_type', $request->input('type', Riddle::TYPE_IDIOM)));
        $userAnswer = trim((string) $request->input('answer', ''));

        if ($roundId <= 0 || $roomId <= 0 || $userAnswer === '') {
            return response()->json(['status' => 'error', 'message' => '参数不完整'], 422);
        }

        $round = RiddleGameRound::with('idiom')->find($roundId);
        if (! $round || $round->room_id !== $roomId || $round->quiz_type !== $quizType) {
            return response()->json(['status' => 'error', 'message' => '回合不存在'], 404);
        }

        // 判题前先做超时结算，避免用户继续抢答无效回合。
        if ($this->riddleGameService->expireRound($round)) {
            return response()->json(['status' => 'error', 'message' => '该回合已超时结束'], 400);
        }

        if ($round->status !== 'active') {
            if ($round->status === 'answered') {
                return response()->json([
                    'status' => 'error',
                    'message' => "这道{$this->riddleGameService->getQuizTypeLabel($round->quiz_type)}已被「{$round->winner_username}」抢先答对了！",
                ], 400);
            }

            return response()->json(['status' => 'error', 'message' => '该回合已结束'], 400);
        }

        // 答案对比忽略空格与大小写，减少正常输入误判。
        $normalizedAnswer = str_replace(' ', '', $userAnswer);
        $normalizedCorrect = str_replace(' ', '', (string) $round->idiom?->answer);
        if (mb_strtolower($normalizedAnswer) !== mb_strtolower($normalizedCorrect)) {
            return response()->json([
                'status' => 'error',
                'message' => '答案不正确，再想想！',
            ]);
        }

        $lockKey = "riddle:answer_lock:{$roundId}";
        if (! Redis::setnx($lockKey, 1)) {
            return response()->json([
                'status' => 'error',
                'message' => "这道{$this->riddleGameService->getQuizTypeLabel($round->quiz_type)}已被「{$round->winner_username}」抢先答对了！",
            ], 400);
        }

        Redis::expire($lockKey, 10);

        // 抢答成功后立即封盘，确保并发请求读到统一状态。
        $round->update([
            'status' => 'answered',
            'winner_id' => $user->id,
            'winner_username' => $user->username,
            'ended_at' => now(),
        ]);

        if ($round->reward_gold > 0) {
            $this->currencyService->change(
                $user,
                'gold',
                $round->reward_gold,
                \App\Enums\CurrencySource::GAME_REWARD,
                $this->riddleGameService->buildRewardDescription($round),
                $roomId,
            );
        }

        if ($round->reward_exp > 0) {
            // 经验奖励仍沿用现有字段，避免引入额外奖励服务改动。
            $user->exp_num = ($user->exp_num ?? 0) + $round->reward_exp;
            $user->save();
        }

        broadcast(new RiddleGameAnswered(
            roomId: $roomId,
            roundId: $round->id,
            quizType: $round->quiz_type,
            answer: (string) $round->idiom?->answer,
            winnerUsername: $user->username,
            rewardGold: $round->reward_gold,
            rewardExp: $round->reward_exp,
        ));

        $quizTypeLabel = $this->riddleGameService->getQuizTypeLabel($round->quiz_type);
        $resultMsg = [
            'id' => app(\App\Services\ChatStateService::class)->nextMessageId($roomId),
            'room_id' => $roomId,
            'from_user' => '系统传音',
            'to_user' => '大家',
            'content' => "🎉 【猜谜活动·{$quizTypeLabel}】{$user->username} 率先答对「{$round->idiom?->answer}」，获得 {$round->reward_gold} 金币、{$round->reward_exp} 经验！",
            'is_secret' => false,
            'font_color' => '#16a34a',
            'action' => 'idiom_result',
            'winner_username' => $user->username,
            'quiz_type' => $round->quiz_type,
            'quiz_type_label' => $quizTypeLabel,
            'quiz_answer' => (string) $round->idiom?->answer,
            'quiz_reward_gold' => $round->reward_gold,
            'quiz_reward_exp' => $round->reward_exp,
            'quiz_round_id' => $round->id,
            'quiz_round_ended_id' => $round->id,
            'idiom_answer' => (string) $round->idiom?->answer,
            'idiom_result_reward_gold' => $round->reward_gold,
            'idiom_result_reward_exp' => $round->reward_exp,
            'idiom_game_round_ended_id' => $round->id,
            'sent_at' => now()->toDateTimeString(),
        ];
        app(\App\Services\ChatStateService::class)->pushMessage($roomId, $resultMsg);

        Redis::del($lockKey);

        return response()->json([
            'status' => 'success',
            'message' => "🎉 回答正确！获得 {$round->reward_gold} 金币、{$round->reward_exp} 经验！",
            'data' => [
                'quiz_type' => $round->quiz_type,
                'quiz_type_label' => $quizTypeLabel,
                'answer' => (string) $round->idiom?->answer,
                'quiz_answer' => (string) $round->idiom?->answer,
                'reward_gold' => $round->reward_gold,
                'reward_exp' => $round->reward_exp,
                'quiz_reward_gold' => $round->reward_gold,
                'quiz_reward_exp' => $round->reward_exp,
            ],
        ]);
    }

    /**
     * 方法功能：查询当前房间指定题型的进行中回合。
     */
    public function current(Request $request): JsonResponse
    {
        $roomId = (int) $request->input('room_id', 0);
        $quizType = $this->riddleGameService->normalizeQuizType($request->input('quiz_type', $request->input('type', Riddle::TYPE_IDIOM)));
        if ($roomId <= 0) {
            return response()->json(['status' => 'error', 'message' => '缺少房间 ID'], 422);
        }

        $round = $this->riddleGameService->findActiveRound($roomId, $quizType);
        if (! $round) {
            return response()->json(['status' => 'success', 'data' => null]);
        }

        if ($this->riddleGameService->expireRound($round)) {
            return response()->json(['status' => 'success', 'data' => null]);
        }

        return response()->json([
            'status' => 'success',
            'data' => [
                'quiz_type' => $round->quiz_type,
                'quiz_type_label' => $this->riddleGameService->getQuizTypeLabel($round->quiz_type),
                'round_id' => $round->id,
                'quiz_round_id' => $round->id,
                'hint' => $round->idiom?->hint ?? '',
                'quiz_hint' => $round->idiom?->hint ?? '',
                'reward_gold' => $round->reward_gold,
                'reward_exp' => $round->reward_exp,
                'quiz_reward_gold' => $round->reward_gold,
                'quiz_reward_exp' => $round->reward_exp,
            ],
        ]);
    }
}