<?php

namespace App\Http\Controllers;

use App\Services\OnlineUsersService;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Log;

class OnlineUsersController extends Controller
{
    protected OnlineUsersService $onlineUsersService;
    
    public function __construct(OnlineUsersService $onlineUsersService)
    {
        $this->onlineUsersService = $onlineUsersService;
    }
    
    /**
     * Get list of online users
     * 
     * @param Request $request
     * @return JsonResponse
     */
    public function index(Request $request): JsonResponse
    {
        try {
            $timeoutMinutes = 5; // Fixed to 5 minutes
            
            $onlineUsers = $this->onlineUsersService->getOnlineUsers($timeoutMinutes);
            
            return response()->json([
                'success' => true,
                'data' => $onlineUsers,
                'meta' => [
                    'timeout_minutes' => $timeoutMinutes,
                    'total_online' => $onlineUsers->count(),
                    'timestamp' => now()->toISOString()
                ],
                'message' => 'Online users retrieved successfully.'
            ]);
            
        } catch (\Exception $e) {
            Log::error('Error fetching online users: ' . $e->getMessage());
            
            return response()->json([
                'success' => false,
                'message' => 'Failed to retrieve online users.',
                'error' => config('app.debug') ? $e->getMessage() : 'Internal server error'
            ], 500);
        }
    }
    
    /**
     * Get online users count
     * 
     * @param Request $request
     * @return JsonResponse
     */
    public function count(Request $request): JsonResponse
    {
        try {
            $timeoutMinutes = 5; // Fixed to 5 minutes
            
            $count = $this->onlineUsersService->getOnlineUsersCount($timeoutMinutes);
            
            return response()->json([
                'success' => true,
                'data' => [
                    'count' => $count,
                    'timeout_minutes' => $timeoutMinutes
                ],
                'message' => 'Online users count retrieved successfully.'
            ]);
            
        } catch (\Exception $e) {
            Log::error('Error fetching online users count: ' . $e->getMessage());
            
            return response()->json([
                'success' => false,
                'message' => 'Failed to retrieve online users count.',
                'error' => config('app.debug') ? $e->getMessage() : 'Internal server error'
            ], 500);
        }
    }
    
    /**
     * Get online users statistics
     * 
     * @return JsonResponse
     */
    public function stats(): JsonResponse
    {
        try {
            $stats = $this->onlineUsersService->getOnlineUsersStats();
            
            return response()->json([
                'success' => true,
                'data' => $stats,
                'message' => 'Online users statistics retrieved successfully.'
            ]);
            
        } catch (\Exception $e) {
            Log::error('Error fetching online users stats: ' . $e->getMessage());
            
            return response()->json([
                'success' => false,
                'message' => 'Failed to retrieve online users statistics.',
                'error' => config('app.debug') ? $e->getMessage() : 'Internal server error'
            ], 500);
        }
    }
    
    /**
     * Get current user's session information
     * 
     * @param Request $request
     * @return JsonResponse
     */
    public function mySession(Request $request): JsonResponse
    {
        try {
            $user = $request->user();
            
            if (!$user) {
                return response()->json([
                    'success' => false,
                    'message' => 'User not authenticated.'
                ], 401);
            }
            
            $sessionInfo = $this->onlineUsersService->getUserSessionInfo($user->id);
            
            if (!$sessionInfo) {
                return response()->json([
                    'success' => false,
                    'message' => 'No active session found.'
                ], 404);
            }
            
            return response()->json([
                'success' => true,
                'data' => $sessionInfo,
                'message' => 'Session information retrieved successfully.'
            ]);
            
        } catch (\Exception $e) {
            Log::error('Error fetching user session info: ' . $e->getMessage());
            
            return response()->json([
                'success' => false,
                'message' => 'Failed to retrieve session information.',
                'error' => config('app.debug') ? $e->getMessage() : 'Internal server error'
            ], 500);
        }
    }
    
    /**
     * Clear online users cache (admin only)
     * 
     * @return JsonResponse
     */
    public function clearCache(): JsonResponse
    {
        try {
            $this->onlineUsersService->clearCache();
            
            return response()->json([
                'success' => true,
                'message' => 'Online users cache cleared successfully.'
            ]);
            
        } catch (\Exception $e) {
            Log::error('Error clearing online users cache: ' . $e->getMessage());
            
            return response()->json([
                'success' => false,
                'message' => 'Failed to clear cache.',
                'error' => config('app.debug') ? $e->getMessage() : 'Internal server error'
            ], 500);
        }
    }
}