<?php

use App\Services\QuestionServiceApi;
use Illuminate\Support\Facades\Route;
use Illuminate\Support\Facades\Log;
use App\Events\QuestionGenerationCompleted;
use App\Events\QuestionGenerationFailed;

/*
|--------------------------------------------------------------------------
| 题库管理 API 路由
|--------------------------------------------------------------------------
*/

// 接收题目生成回调
Route::post('/questions/callback', function () {
    try {
        $data = request()->all();
        Log::info('Received question generation callback', $data);

        // 验证回调数据
        if (!isset($data['task_id']) || !isset($data['status'])) {
            return response()->json(['error' => 'Invalid callback data'], 400);
        }

        // 存储回调结果到 session 中，供前端查询
        session(['question_gen_callback_' . $data['task_id'] => $data]);

        // ✅ 记录任务状态，10秒后自动清除
        cache([$data['task_id'] => $data], now()->addSeconds(10));

        // ✅ 使用事件替代轮询 - 直接分发事件给前端
        if ($data['status'] === 'completed') {
            QuestionGenerationCompleted::dispatch(
                $data['task_id'],
                $data['kp_code'] ?? '',
                $data['total'] ?? 0
            );
        } elseif ($data['status'] === 'failed') {
            QuestionGenerationFailed::dispatch(
                $data['task_id'],
                $data['kp_code'] ?? '',
                $data['error'] ?? '未知错误'
            );
        }

        return response()->json([
            'success' => true,
            'message' => 'Callback received',
            'status' => $data['status']
        ]);
    } catch (\Exception $e) {
        Log::error('Callback processing failed: ' . $e->getMessage());
        return response()->json(['error' => $e->getMessage()], 500);
    }
})->name('api.questions.callback');

// 获取题目生成回调结果
Route::get('/questions/callback/{taskId}', function (string $taskId) {
    $callbackData = session('question_gen_callback_' . $taskId);
    if ($callbackData) {
        // 清除已读取的回调数据
        session()->forget('question_gen_callback_' . $taskId);
        return response()->json($callbackData);
    }
    return response()->json(['status' => 'pending'], 202);
})->name('api.questions.callback.get');

// 题目相关 API
Route::get('/questions', function (QuestionServiceApi $service) {
    try {
        $page = (int) request()->get('page', 1);
        $perPage = (int) request()->get('per_page', 25);

        $filters = [
            'kp_code' => request()->get('kp_code'),
            'difficulty' => request()->get('difficulty'),
            'search' => request()->get('search'),
        ];

        $response = $service->listQuestions($page, $perPage, $filters);

        return response()->json($response);
    } catch (\Exception $e) {
        \Log::error('Failed to fetch questions: ' . $e->getMessage());
        return response()->json([
            'data' => [],
            'meta' => [
                'page' => 1,
                'per_page' => 25,
                'total' => 0,
                'total_pages' => 0,
            ],
            'error' => $e->getMessage(),
        ], 500);
    }
});

// 获取题目统计信息
Route::get('/questions/statistics', function (QuestionServiceApi $service) {
    try {
        $stats = $service->getStatistics();
        return response()->json($stats);
    } catch (\Exception $e) {
        \Log::error('Failed to get question statistics: ' . $e->getMessage());
        return response()->json(['error' => $e->getMessage()], 500);
    }
});

// 语义搜索题目
Route::post('/questions/search', function (QuestionServiceApi $service) {
    try {
        $data = request()->only(['query', 'limit']);
        $results = $service->searchQuestions($data['query'], $data['limit'] ?? 20);
        return response()->json($results);
    } catch (\Exception $e) {
        \Log::error('Question search failed: ' . $e->getMessage());
        return response()->json(['error' => $e->getMessage()], 500);
    }
});

// 获取单个题目详情
Route::get('/questions/{id}', function (int $id, QuestionServiceApi $service) {
    try {
        $question = $service->getQuestionById($id);
        if (!$question) {
            return response()->json(['error' => 'Question not found'], 404);
        }
        return response()->json($question);
    } catch (\Exception $e) {
        \Log::error("Failed to get question {$id}: " . $e->getMessage());
        return response()->json(['error' => $e->getMessage()], 500);
    }
});

// AI 生成题目
Route::post('/questions/generate', function (QuestionServiceApi $service) {
    try {
        $data = request()->only(['kp_code', 'keyword', 'count', 'strategy']);
        $result = $service->generateQuestions($data);
        return response()->json($result);
    } catch (\Exception $e) {
        \Log::error('Question generation failed: ' . $e->getMessage());
        return response()->json([
            'success' => false,
            'message' => $e->getMessage(),
        ], 500);
    }
});

// 删除题目
Route::delete('/questions/{id}', function (int $id, QuestionServiceApi $service) {
    try {
        $deleted = $service->deleteQuestion($id);
        return response()->json([
            'success' => $deleted,
            'message' => $deleted ? 'Question deleted' : 'Failed to delete',
        ]);
    } catch (\Exception $e) {
        \Log::error("Failed to delete question {$id}: " . $e->getMessage());
        return response()->json([
            'success' => false,
            'message' => $e->getMessage(),
        ], 500);
    }
});

// 获取知识点选项
Route::get('/knowledge-points', function (QuestionServiceApi $service) {
    try {
        $points = $service->getKnowledgePointOptions();
        return response()->json($points);
    } catch (\Exception $e) {
        \Log::error('Failed to get knowledge points: ' . $e->getMessage());
        return response()->json([], 500);
    }
});

/*
|--------------------------------------------------------------------------
| MathRecSys 集成 API 路由
|--------------------------------------------------------------------------
*/

use App\Http\Controllers\Api\StudentController;

// 健康检查
Route::get('/mathrecsys/health', [StudentController::class, 'checkServiceHealth'])->name('api.mathrecsys.health');

// 学生相关 API
Route::prefix('mathrecsys/students')->name('api.mathrecsys.students.')->group(function () {
    // 获取学生完整信息
    Route::get('{studentId}', [StudentController::class, 'show'])->name('show');

    // 获取个性化推荐
    Route::get('{studentId}/recommendations', [StudentController::class, 'getRecommendations'])->name('recommendations');

    // 获取学习轨迹
    Route::get('{studentId}/trajectory', [StudentController::class, 'getTrajectory'])->name('trajectory');

    // 获取学习建议
    Route::get('{studentId}/suggestions', [StudentController::class, 'getSuggestions'])->name('suggestions');

    // 智能分析题目
    Route::post('{studentId}/analyze', [StudentController::class, 'analyzeQuestion'])->name('analyze');

    // 更新掌握度
    Route::put('{studentId}/mastery', [StudentController::class, 'updateMastery'])->name('update-mastery');
});

// 班级分析 API
Route::prefix('mathrecsys/classes')->name('api.mathrecsys.classes.')->group(function () {
    Route::get('{classId}/analysis', [StudentController::class, 'classAnalysis'])->name('analysis');
});

// 测试 API
Route::get('/mathrecsys/test', function () {
    return response()->json([
        'success' => true,
        'message' => 'MathRecSys API integration is working',
        'timestamp' => now()->toISOString()
    ]);
})->name('api.mathrecsys.test');