panel & coding

backend/main.py

@@ -6,6 +6,7 @@ import asyncio
 from mongo_service import MongoService
 from web3_service import Web3Service
 import logging
+from datetime import datetime
 
 # Load environment variables first
 load_dotenv()
@@ -75,11 +76,23 @@ logging.basicConfig(
 )
 logger = logging.getLogger(__name__)
 
+# ✅ DEFINE check_docker_availability BEFORE using it
+def check_docker_availability():
+    """Check if Docker is available for compiler service"""
+    try:
+        import docker
+        client = docker.from_env()
+        client.ping()
+        return True
+    except Exception:
+        return False
+
 # Initialize services with error handling
 try:
     mongo_service = MongoService(app.config['MONGODB_URI'])
     app.config['MONGO_SERVICE'] = mongo_service
     MONGO_SERVICE_AVAILABLE = True
+    logger.info("✅ MongoDB service initialized")
 except Exception as e:
     logging.error(f"Failed to initialize MongoDB service: {e}")
     mongo_service = None
@@ -92,6 +105,7 @@ try:
     )
     app.config['WEB3_SERVICE'] = web3_service
     WEB3_SERVICE_AVAILABLE = True
+    logger.info("✅ Web3 service initialized")
 except Exception as e:
     logging.error(f"Failed to initialize Web3 service: {e}")
     web3_service = None
@@ -100,44 +114,229 @@ except Exception as e:
 # Make services available to routes
 if WALLET_SERVICE_AVAILABLE:
     app.config['WALLET_SERVICE'] = wallet_service
+    logger.info("✅ Wallet service available")
 
 if COMPILER_SERVICE_AVAILABLE:
     app.config['REAL_COMPILER_SERVICE'] = real_compiler_service
+    logger.info("✅ Compiler service available")
 
-# ✅ DEFINE check_docker_availability BEFORE using it
+# ✅ ENHANCED: Register all blueprints with better error handling
-def check_docker_availability():
-    """Check if Docker is available for compiler service"""
-    try:
-        import docker
-        client = docker.from_env()
-        client.ping()
-        return True
-    except Exception:
-        return False
-
-# Register all blueprints with error handling
 blueprints = [
-    (auth.bp, '/api/auth'),
+    (auth.bp, '/api/auth', 'Authentication'),
-    (test_flow.bp, '/api/test'),
+    (test_flow.bp, '/api/test', 'Test Flow'),
-    (certificate.bp, '/api/certificate'),
+    (certificate.bp, '/api/certificate', 'Certificates'),
-    (dashboard.bp, '/api/dashboard'),
+    (dashboard.bp, '/api/dashboard', 'Dashboard'),
-    (courses.bp, '/api/courses'),
+    (courses.bp, '/api/courses', 'Courses'),
-    (quizzes.bp, '/api/quizzes'),
+    (quizzes.bp, '/api/quizzes', 'Quizzes'),
-    (admin.bp, '/api/admin'),
+    (admin.bp, '/api/admin', 'Admin Panel'),
-    (exam.bp, '/api/exam'),  # Coding exam routes
+    (exam.bp, '/api/exam', 'Coding Exams'),  # ✅ Key for coding exam functionality
-    (compiler.bp, '/api/compiler'),  # Compiler routes
+    (compiler.bp, '/api/compiler', 'Code Compiler'),  # ✅ Key for compiler functionality
 ]
 
-for blueprint, url_prefix in blueprints:
+registered_blueprints = []
+failed_blueprints = []
+
+for blueprint, url_prefix, description in blueprints:
     try:
         app.register_blueprint(blueprint, url_prefix=url_prefix)
-        logging.info(f"✅ Registered blueprint: {url_prefix}")
+        registered_blueprints.append((description, url_prefix))
-        print(f"✅ Registered blueprint: {url_prefix}")
+        logging.info(f"✅ Registered {description}: {url_prefix}")
+        print(f"✅ Registered {description}: {url_prefix}")
     except Exception as e:
-        logging.error(f"❌ Failed to register blueprint {url_prefix}: {e}")
+        failed_blueprints.append((description, url_prefix, str(e)))
-        print(f"❌ Failed to register blueprint {url_prefix}: {e}")
+        logging.error(f"❌ Failed to register {description} ({url_prefix}): {e}")
+        print(f"❌ Failed to register {description} ({url_prefix}): {e}")
 
-# Debug routes
+# ✅ CRITICAL FIX: Add missing exam info endpoint directly to main.py
+@app.route('/api/exam/info/<exam_code>', methods=['GET', 'OPTIONS'])
+def get_exam_info_direct(exam_code):
+    """Direct exam info endpoint for host panel - CRITICAL FIX"""
+    if request.method == "OPTIONS":
+        response = jsonify({'status': 'ok'})
+        response.headers.add("Access-Control-Allow-Origin", "*")
+        response.headers.add("Access-Control-Allow-Headers", "Content-Type,Authorization")
+        response.headers.add("Access-Control-Allow-Methods", "GET,OPTIONS")
+        return response
+    
+    try:
+        print(f"📊 DIRECT host panel request for exam: {exam_code}")
+        
+        # Get MongoDB connection
+        from pymongo import MongoClient
+        client = MongoClient(app.config['MONGODB_URI'])
+        db = client.openlearnx
+        
+        exam = db.exams.find_one({"exam_code": exam_code.upper()})
+        if not exam:
+            print(f"❌ Exam not found: {exam_code}")
+            return jsonify({"success": False, "error": "Exam not found"}), 404
+        
+        # Convert datetime to string if needed
+        created_at = exam.get("created_at")
+        if hasattr(created_at, 'isoformat'):
+            created_at = created_at.isoformat()
+        elif created_at:
+            created_at = str(created_at)
+        
+        exam_info = {
+            "title": exam.get("title", "Untitled Exam"),
+            "status": exam.get("status", "waiting"),
+            "duration_minutes": exam.get("duration_minutes", 30),
+            "participants_count": len(exam.get("participants", [])),
+            "max_participants": exam.get("max_participants", 50),
+            "problem_title": exam.get("problem", {}).get("title", exam.get("title", "Coding Challenge")),
+            "languages": exam.get("problem", {}).get("languages", ["python"]),
+            "created_at": created_at,
+            "host_name": exam.get("host_name", "Unknown Host")
+        }
+        
+        print(f"✅ Found exam: {exam_info['title']} (Status: {exam_info['status']})")
+        return jsonify({"success": True, "exam_info": exam_info})
+        
+    except Exception as e:
+        print(f"❌ Error getting exam info: {str(e)}")
+        import traceback
+        traceback.print_exc()
+        return jsonify({"success": False, "error": f"Server error: {str(e)}"}), 500
+
+# ✅ ADD: Additional missing host panel endpoints
+@app.route('/api/exam/participants/<exam_code>', methods=['GET', 'OPTIONS'])
+def get_participants_direct(exam_code):
+    """Get participants for host panel"""
+    if request.method == "OPTIONS":
+        response = jsonify({'status': 'ok'})
+        response.headers.add("Access-Control-Allow-Origin", "*")
+        response.headers.add("Access-Control-Allow-Headers", "Content-Type,Authorization")
+        response.headers.add("Access-Control-Allow-Methods", "GET,OPTIONS")
+        return response
+    
+    try:
+        print(f"👥 DIRECT participants request for exam: {exam_code}")
+        
+        from pymongo import MongoClient
+        client = MongoClient(app.config['MONGODB_URI'])
+        db = client.openlearnx
+        
+        exam = db.exams.find_one({"exam_code": exam_code.upper()})
+        if not exam:
+            return jsonify({"success": False, "error": "Exam not found"}), 404
+        
+        participants = exam.get("participants", [])
+        
+        # Format participant data
+        formatted_participants = []
+        for participant in participants:
+            # Convert datetime to string if needed
+            joined_at = participant.get("joined_at")
+            if hasattr(joined_at, 'isoformat'):
+                joined_at = joined_at.isoformat()
+            elif joined_at:
+                joined_at = str(joined_at)
+                
+            submitted_at = participant.get("submitted_at")
+            if hasattr(submitted_at, 'isoformat'):
+                submitted_at = submitted_at.isoformat()
+            elif submitted_at:
+                submitted_at = str(submitted_at)
+            
+            participant_data = {
+                "name": participant.get("name", ""),
+                "score": participant.get("score", 0),
+                "completed": participant.get("completed", False),
+                "joined_at": joined_at,
+                "submitted_at": submitted_at
+            }
+            formatted_participants.append(participant_data)
+        
+        print(f"✅ Found {len(formatted_participants)} participants for exam {exam_code}")
+        return jsonify({"success": True, "participants": formatted_participants})
+        
+    except Exception as e:
+        print(f"❌ Error getting participants: {str(e)}")
+        return jsonify({"success": False, "error": str(e)}), 500
+
+@app.route('/api/exam/remove-participant', methods=['POST', 'OPTIONS'])
+def remove_participant_direct():
+    """Remove participant from exam (host panel)"""
+    if request.method == "OPTIONS":
+        response = jsonify({'status': 'ok'})
+        response.headers.add("Access-Control-Allow-Origin", "*")
+        response.headers.add("Access-Control-Allow-Headers", "Content-Type,Authorization")
+        response.headers.add("Access-Control-Allow-Methods", "POST,OPTIONS")
+        return response
+    
+    try:
+        data = request.get_json()
+        exam_code = data.get('exam_code', '').upper()
+        participant_name = data.get('participant_name', '')
+        
+        print(f"🗑️ DIRECT remove participant request: {participant_name} from {exam_code}")
+        
+        if not exam_code or not participant_name:
+            return jsonify({"success": False, "error": "Missing exam_code or participant_name"}), 400
+        
+        from pymongo import MongoClient
+        client = MongoClient(app.config['MONGODB_URI'])
+        db = client.openlearnx
+        
+        result = db.exams.update_one(
+            {"exam_code": exam_code},
+            {"$pull": {"participants": {"name": participant_name}}}
+        )
+        
+        if result.modified_count > 0:
+            print(f"✅ Removed participant {participant_name} from exam {exam_code}")
+            return jsonify({"success": True, "message": f"Participant {participant_name} removed successfully"})
+        else:
+            return jsonify({"success": False, "error": "Participant not found or already removed"}), 404
+            
+    except Exception as e:
+        print(f"❌ Error removing participant: {str(e)}")
+        return jsonify({"success": False, "error": str(e)}), 500
+
+@app.route('/api/exam/stop-exam', methods=['POST', 'OPTIONS'])
+def stop_exam_direct():
+    """Stop exam (host panel)"""
+    if request.method == "OPTIONS":
+        response = jsonify({'status': 'ok'})
+        response.headers.add("Access-Control-Allow-Origin", "*")
+        response.headers.add("Access-Control-Allow-Headers", "Content-Type,Authorization")
+        response.headers.add("Access-Control-Allow-Methods", "POST,OPTIONS")
+        return response
+    
+    try:
+        data = request.get_json()
+        exam_code = data.get('exam_code', '').upper()
+        
+        print(f"🛑 DIRECT stop exam request: {exam_code}")
+        
+        if not exam_code:
+            return jsonify({"success": False, "error": "Missing exam_code"}), 400
+        
+        from pymongo import MongoClient
+        client = MongoClient(app.config['MONGODB_URI'])
+        db = client.openlearnx
+        
+        result = db.exams.update_one(
+            {"exam_code": exam_code},
+            {"$set": {
+                "status": "completed", 
+                "ended_at": datetime.now().isoformat(),
+                "ended_by": "host"
+            }}
+        )
+        
+        if result.modified_count > 0:
+            print(f"✅ Exam {exam_code} stopped by host")
+            return jsonify({"success": True, "message": "Exam stopped successfully"})
+        else:
+            return jsonify({"success": False, "error": "Exam not found"}), 404
+            
+    except Exception as e:
+        print(f"❌ Error stopping exam: {str(e)}")
+        return jsonify({"success": False, "error": str(e)}), 500
+
+# ✅ ENHANCED: Debug routes with better structure
 @app.route('/debug/routes')
 def debug_routes():
     """Debug route to see all registered routes"""
@@ -150,7 +349,15 @@ def debug_routes():
         })
     return jsonify({
         "total_routes": len(routes),
-        "routes": sorted(routes, key=lambda x: x['rule'])
+        "routes": sorted(routes, key=lambda x: x['rule']),
+        "registered_blueprints": [desc for desc, url in registered_blueprints],
+        "failed_blueprints": failed_blueprints,
+        "direct_exam_routes_added": [
+            "/api/exam/info/<exam_code>",
+            "/api/exam/participants/<exam_code>", 
+            "/api/exam/remove-participant",
+            "/api/exam/stop-exam"
+        ]
     })
 
 @app.route('/debug/exam-routes')
@@ -164,9 +371,22 @@ def debug_exam_routes():
                 'methods': list(rule.methods),
                 'rule': str(rule)
             })
+    
     return jsonify({
         "exam_routes": exam_routes,
-        "exam_blueprint_registered": hasattr(exam, 'bp')
+        "exam_blueprint_registered": any('Coding Exams' in desc for desc, _ in registered_blueprints),
+        "expected_exam_routes": [
+            "/api/exam/create-exam",
+            "/api/exam/join-exam", 
+            "/api/exam/start-exam",
+            "/api/exam/info/<exam_code>",
+            "/api/exam/participants/<exam_code>",
+            "/api/exam/remove-participant",
+            "/api/exam/stop-exam",
+            "/api/exam/leaderboard/<exam_code>",
+            "/api/exam/test"
+        ],
+        "direct_routes_added": True
     })
 
 @app.route('/debug/services')
@@ -181,10 +401,17 @@ def debug_services():
             "docker": check_docker_availability()
         },
         "app_config_keys": list(app.config.keys()),
-        "blueprint_count": len(app.blueprints)
+        "blueprint_count": len(app.blueprints),
+        "registered_blueprints": registered_blueprints,
+        "failed_blueprints": failed_blueprints,
+        "exam_system_ready": all([
+            MONGO_SERVICE_AVAILABLE,
+            any('Coding Exams' in desc for desc, _ in registered_blueprints)
+        ]),
+        "direct_exam_endpoints_added": True
     })
 
-# Direct exam test route
+# ✅ ENHANCED: Direct exam test route with better functionality
 @app.route('/api/exam/test-direct', methods=['GET', 'POST', 'OPTIONS'])
 def test_exam_direct():
     """Direct test route for exam functionality"""
@@ -199,22 +426,28 @@ def test_exam_direct():
         "success": True,
         "message": "Direct exam route is working",
         "method": request.method,
-        "timestamp": os.popen('date').read().strip(),
+        "timestamp": datetime.now().isoformat(),
-        "data": request.json if request.method == "POST" else None
+        "data": request.json if request.method == "POST" else None,
+        "mongo_available": MONGO_SERVICE_AVAILABLE,
+        "exam_blueprint_registered": any('Coding Exams' in desc for desc, _ in registered_blueprints),
+        "direct_endpoints_added": True
     })
 
-# Health check endpoints
+# ✅ ENHANCED: Health check endpoints
 @app.route('/')
 def health_check():
     return jsonify({
         "status": "OpenLearnX API is running", 
-        "version": "2.0.0",
+        "version": "2.0.1",
+        "timestamp": datetime.now().isoformat(),
         "features": {
             "blockchain": WEB3_SERVICE_AVAILABLE,
             "coding_exams": COMPILER_SERVICE_AVAILABLE,
             "wallet_auth": WALLET_SERVICE_AVAILABLE,
             "database": MONGO_SERVICE_AVAILABLE,
-            "real_compiler": COMPILER_SERVICE_AVAILABLE
+            "real_compiler": COMPILER_SERVICE_AVAILABLE,
+            "docker": check_docker_availability(),
+            "direct_exam_endpoints": True
         },
         "endpoints": {
             "auth": "/api/auth",
@@ -231,7 +464,10 @@ def health_check():
             "/debug/exam-routes",
             "/debug/services",
             "/api/exam/test-direct"
-        ]
+        ],
+        "registered_blueprints": len(registered_blueprints),
+        "failed_blueprints": len(failed_blueprints),
+        "host_panel_fix": "✅ Direct endpoints added"
     })
 
 @app.route('/api/health')
@@ -239,7 +475,7 @@ def api_health():
     """Comprehensive API health check"""
     health_status = {
         "status": "healthy",
-        "timestamp": os.popen('date').read().strip(),
+        "timestamp": datetime.now().isoformat(),
         "services": {
             "mongodb": MONGO_SERVICE_AVAILABLE,
             "web3": WEB3_SERVICE_AVAILABLE,
@@ -253,10 +489,24 @@ def api_health():
             "secret_key_set": bool(app.config.get('SECRET_KEY')),
             "admin_token_set": bool(app.config.get('ADMIN_TOKEN'))
         },
-        "blueprints_registered": list(app.blueprints.keys())
+        "blueprints_registered": list(app.blueprints.keys()),
+        "exam_system": {
+            "ready": all([
+                MONGO_SERVICE_AVAILABLE,
+                any('Coding Exams' in desc for desc, _ in registered_blueprints)
+            ]),
+            "features": [
+                "Real-time exam creation",
+                "Student joining with exam codes", 
+                "Host management panel",
+                "Live leaderboards",
+                "Multi-language compiler support"
+            ],
+            "host_panel_fix": "✅ Direct endpoints added to main.py"
+        }
     }
     
-    # Check MongoDB connection
+    # ✅ ENHANCED: Check MongoDB connection
     if MONGO_SERVICE_AVAILABLE:
         try:
             from pymongo import MongoClient
@@ -267,7 +517,7 @@ def api_health():
             health_status["services"]["mongodb_connection"] = f"error: {str(e)}"
             health_status["status"] = "degraded"
     
-    # Check Web3 connection
+    # ✅ ENHANCED: Check Web3 connection
     if WEB3_SERVICE_AVAILABLE:
         try:
             if web3_service and web3_service.w3.is_connected():
@@ -287,6 +537,7 @@ def admin_health():
     """Admin-specific health check"""
     return jsonify({
         "status": "Admin API is running",
+        "timestamp": datetime.now().isoformat(),
         "admin_token_configured": bool(app.config.get('ADMIN_TOKEN')),
         "admin_endpoints": [
             "/api/admin/dashboard",
@@ -302,7 +553,11 @@ def admin_health():
             "/api/exam/start-exam",
             "/api/exam/submit-solution",
             "/api/exam/leaderboard/<exam_code>",
-            "/api/exam/host-dashboard/<exam_code>"
+            "/api/exam/host-dashboard/<exam_code>",
+            "/api/exam/info/<exam_code>",
+            "/api/exam/participants/<exam_code>",
+            "/api/exam/remove-participant",
+            "/api/exam/stop-exam"
         ],
         "compiler_endpoints": [
             "/api/compiler/languages",
@@ -311,15 +566,26 @@ def admin_health():
             "/api/compiler/status/<execution_id>",
             "/api/compiler/test",
             "/api/compiler/stats"
-        ]
+        ],
+        "exam_system_status": {
+            "ready": all([
+                MONGO_SERVICE_AVAILABLE,
+                any('Coding Exams' in desc for desc, _ in registered_blueprints)
+            ]),
+            "mongo_connected": MONGO_SERVICE_AVAILABLE,
+            "exam_routes_registered": any('Coding Exams' in desc for desc, _ in registered_blueprints),
+            "host_panel_endpoints": "✅ Added directly to main.py"
+        }
     })
 
-# Error handlers
+# ✅ ENHANCED: Error handlers with better error information
 @app.errorhandler(404)
 def not_found(error):
     return jsonify({
         "error": "Endpoint not found",
         "message": "The requested API endpoint does not exist",
+        "requested_path": request.path,
+        "method": request.method,
         "available_endpoints": [
             "/api/auth", "/api/courses", "/api/admin", 
             "/api/exam", "/api/dashboard", "/api/certificate",
@@ -329,6 +595,13 @@ def not_found(error):
             "/debug/routes",
             "/debug/exam-routes", 
             "/debug/services"
+        ],
+        "exam_specific_endpoints": [
+            "/api/exam/create-exam",
+            "/api/exam/join-exam",
+            "/api/exam/info/<exam_code>",
+            "/api/exam/participants/<exam_code>",
+            "/api/exam/test-direct"
         ]
     }), 404
 
@@ -337,21 +610,24 @@ def internal_error(error):
     app.logger.error(f"Internal server error: {str(error)}")
     return jsonify({
         "error": "Internal server error",
-        "message": "An unexpected error occurred on the server"
+        "message": "An unexpected error occurred on the server",
+        "timestamp": datetime.now().isoformat()
     }), 500
 
 @app.errorhandler(403)
 def forbidden(error):
     return jsonify({
         "error": "Forbidden",
-        "message": "Access denied - check your authentication"
+        "message": "Access denied - check your authentication",
+        "timestamp": datetime.now().isoformat()
     }), 403
 
 @app.errorhandler(401)
 def unauthorized(error):
     return jsonify({
         "error": "Unauthorized",
-        "message": "Authentication required"
+        "message": "Authentication required",
+        "timestamp": datetime.now().isoformat()
     }), 401
 
 @app.errorhandler(Exception)
@@ -359,10 +635,11 @@ def handle_error(error):
     app.logger.error(f"Unhandled error: {str(error)}")
     return jsonify({
         "error": "An unexpected error occurred",
-        "type": type(error).__name__
+        "type": type(error).__name__,
+        "timestamp": datetime.now().isoformat()
     }), 500
 
-# Request logging and CORS handling
+# ✅ ENHANCED: Request logging and CORS handling
 @app.before_request
 def log_request_info():
     """Enhanced request logging"""
@@ -374,6 +651,10 @@ def log_request_info():
         logger.info(f"Exam request: {request.method} {request.path}")
         print(f"📝 Exam request: {request.method} {request.path}")
         
+        # Log request data for debugging
+        if request.method in ['POST', 'PUT'] and request.json:
+            print(f"📦 Request data: {request.json}")
+    
     if '/api/compiler' in request.path:
         logger.info(f"Compiler request: {request.method} {request.path}")
 
@@ -396,13 +677,34 @@ def after_request(response):
     response.headers.add('X-XSS-Protection', '1; mode=block')
     return response
 
-# Startup function
+# ✅ ENHANCED: Startup function with comprehensive initialization  
 def initialize_application():
     """Initialize application with comprehensive error handling"""
     try:
         logger.info("🚀 Initializing OpenLearnX Backend...")
         print("🚀 Initializing OpenLearnX Backend...")
         
+        # ✅ Enhanced blueprint registration status
+        print(f"📋 Blueprint Registration Status:")
+        for description, url_prefix in registered_blueprints:
+            print(f"  ✅ {description}: {url_prefix}")
+        
+        if failed_blueprints:
+            print(f"❌ Failed Blueprints:")
+            for description, url_prefix, error in failed_blueprints:
+                print(f"  ❌ {description}: {url_prefix} - {error}")
+        
+        # ✅ Show direct endpoints added
+        print(f"🔧 Direct Exam Endpoints Added to main.py:")
+        direct_endpoints = [
+            "/api/exam/info/<exam_code>",
+            "/api/exam/participants/<exam_code>",
+            "/api/exam/remove-participant", 
+            "/api/exam/stop-exam"
+        ]
+        for endpoint in direct_endpoints:
+            print(f"  ✅ {endpoint}")
+        
         # Test MongoDB connection
         if MONGO_SERVICE_AVAILABLE:
             try:
@@ -447,7 +749,7 @@ def initialize_application():
                 logger.warning(f"⚠️ Docker connection error: {e}")
                 print(f"⚠️ Docker connection error: {e}")
         
-        # Log configuration
+        # ✅ Enhanced configuration summary
         logger.info("📋 Configuration Summary:")
         print("📋 Configuration Summary:")
         config_items = [
@@ -455,7 +757,9 @@ def initialize_application():
             ("Blockchain", WEB3_SERVICE_AVAILABLE),
             ("Wallet Service", WALLET_SERVICE_AVAILABLE),
             ("Compiler Service", COMPILER_SERVICE_AVAILABLE),
-            ("Docker", check_docker_availability())
+            ("Docker", check_docker_availability()),
+            ("Exam System", any('Coding Exams' in desc for desc, _ in registered_blueprints)),
+            ("Host Panel Fix", True)
         ]
         
         for name, available in config_items:
@@ -463,12 +767,13 @@ def initialize_application():
             logger.info(f"  • {name}: {status}")
             print(f"  • {name}: {status}")
         
-        # Log access URLs
+        # ✅ Enhanced access URLs
         logger.info("🌐 Access URLs:")
         print("🌐 Access URLs:")
         
         urls = [
             ("API Health", "http://127.0.0.1:5000/api/health"),
+            ("Main Page", "http://127.0.0.1:5000/"),
             ("Admin Panel", "http://localhost:3000/admin/login"),
             ("Coding Exams", "http://localhost:3000/coding"),
             ("Real Compiler", "http://localhost:3000/compiler"),
@@ -480,18 +785,43 @@ def initialize_application():
             logger.info(f"  • {name}: {url}")
             print(f"  • {name}: {url}")
         
-        # Debug URLs
+        # ✅ Enhanced debug URLs
         print("🔧 Debug URLs:")
         debug_urls = [
             ("All Routes", "http://127.0.0.1:5000/debug/routes"),
             ("Exam Routes", "http://127.0.0.1:5000/debug/exam-routes"),
             ("Services", "http://127.0.0.1:5000/debug/services"),
-            ("Direct Test", "http://127.0.0.1:5000/api/exam/test-direct")
+            ("Direct Test", "http://127.0.0.1:5000/api/exam/test-direct"),
+            ("Admin Health", "http://127.0.0.1:5000/api/admin/health"),
+            ("Exam Info Test", "http://127.0.0.1:5000/api/exam/info/TEST123")
         ]
         
         for name, url in debug_urls:
             print(f"  • {name}: {url}")
         
+        # ✅ Enhanced exam system status
+        exam_ready = all([
+            MONGO_SERVICE_AVAILABLE,
+            any('Coding Exams' in desc for desc, _ in registered_blueprints)
+        ])
+        
+        print(f"📝 Exam System Status: {'✅ Ready' if exam_ready else '❌ Not Ready'}")
+        print(f"🔧 Host Panel Fix: ✅ Direct endpoints added to main.py")
+        
+        if exam_ready:
+            print("📝 Exam Features Available:")
+            features = [
+                "Create coding exams with 6-character codes",
+                "Students join with exam codes", 
+                "Host management panel with live updates",
+                "Real-time participant monitoring",
+                "Live leaderboards with scoring",
+                "Multi-language code execution",
+                "Host panel endpoints working directly"
+            ]
+            for feature in features:
+                print(f"  • {feature}")
+        
         # Log compiler features
         if COMPILER_SERVICE_AVAILABLE:
             logger.info("💻 Compiler Features:")
@@ -507,7 +837,7 @@ def initialize_application():
                 logger.info(f"  • {feature}")
                 print(f"  • {feature}")
         
-        # Log admin token (partially masked)
+        # ✅ Enhanced admin token logging
         admin_token = app.config.get('ADMIN_TOKEN', 'admin-secret-key')
         if admin_token:
             logger.info(f"🔑 Admin token configured: {admin_token[:8]}...")
@@ -536,13 +866,20 @@ if __name__ == '__main__':
         logger.info("📚 Features: Blockchain Certificates, Coding Exams, Wallet Auth, Real Multi-language Compiler")
         print("📚 Features: Blockchain Certificates, Coding Exams, Wallet Auth, Real Multi-language Compiler")
         
+        # ✅ Enhanced server info
+        print(f"🌐 Server will be available at:")
+        print(f"  • Local: http://127.0.0.1:5000")
+        print(f"  • Network: http://0.0.0.0:5000")
+        print(f"📱 Frontend should connect to: http://127.0.0.1:5000")
+        print(f"🔧 Host Panel Fix: ✅ Direct endpoints added for exam info")
+        
         # Start Flask application
         app.run(
             debug=True, 
             host='0.0.0.0', 
             port=5000,
             threaded=True,
-            use_reloader=False
+            use_reloader=False  # Prevent double initialization
         )
         
     except KeyboardInterrupt:

backend/routes/exam.py

@@ -458,6 +458,146 @@ def get_host_dashboard(exam_code):
     except Exception as e:
         return jsonify({"error": str(e)}), 500
 
+# ✅ CORRECTED: Host panel management endpoints (using Blueprint decorators)
+@bp.route('/info/<exam_code>', methods=['GET', 'OPTIONS'])
+def get_exam_info(exam_code):
+    """Get detailed information about an exam for the host panel"""
+    if request.method == "OPTIONS":
+        response = jsonify({'status': 'ok'})
+        response.headers.add("Access-Control-Allow-Origin", "*")
+        response.headers.add("Access-Control-Allow-Headers", "Content-Type,Authorization")
+        response.headers.add("Access-Control-Allow-Methods", "GET,OPTIONS")
+        return response
+    
+    try:
+        exam = db.exams.find_one({"exam_code": exam_code.upper()})
+        if not exam:
+            return jsonify({"success": False, "error": "Exam not found"}), 404
+        
+        exam_info = {
+            "title": exam["title"],
+            "status": exam["status"],
+            "duration_minutes": exam["duration_minutes"],
+            "participants_count": len(exam.get("participants", [])),
+            "max_participants": exam["max_participants"],
+            "problem_title": exam.get("problem", {}).get("title", exam["title"]),
+            "languages": exam.get("problem", {}).get("languages", ["python"]),
+            "created_at": exam["created_at"],
+            "host_name": exam["host_name"]
+        }
+        
+        print(f"📊 Host panel requested info for exam {exam_code}")
+        return jsonify({"success": True, "exam_info": exam_info})
+    except Exception as e:
+        print(f"❌ Error getting exam info: {str(e)}")
+        return jsonify({"success": False, "error": str(e)}), 500
+
+@bp.route('/participants/<exam_code>', methods=['GET', 'OPTIONS'])
+def get_participants(exam_code):
+    """Get list of participants for host panel monitoring"""
+    if request.method == "OPTIONS":
+        response = jsonify({'status': 'ok'})
+        response.headers.add("Access-Control-Allow-Origin", "*")
+        response.headers.add("Access-Control-Allow-Headers", "Content-Type,Authorization")
+        response.headers.add("Access-Control-Allow-Methods", "GET,OPTIONS")
+        return response
+    
+    try:
+        exam = db.exams.find_one({"exam_code": exam_code.upper()})
+        if not exam:
+            return jsonify({"success": False, "error": "Exam not found"}), 404
+        
+        participants = exam.get("participants", [])
+        
+        # Format participant data for host panel
+        formatted_participants = []
+        for participant in participants:
+            participant_data = {
+                "name": participant.get("name", ""),
+                "score": participant.get("score", 0),
+                "completed": participant.get("completed", False),
+                "joined_at": participant.get("joined_at", ""),
+                "submitted_at": participant.get("submitted_at", None)
+            }
+            formatted_participants.append(participant_data)
+        
+        print(f"👥 Retrieved {len(formatted_participants)} participants for exam {exam_code}")
+        return jsonify({"success": True, "participants": formatted_participants})
+    except Exception as e:
+        print(f"❌ Error getting participants: {str(e)}")
+        return jsonify({"success": False, "error": str(e)}), 500
+
+@bp.route('/remove-participant', methods=['POST', 'OPTIONS'])
+def remove_participant():
+    """Remove a participant from an exam (host only)"""
+    if request.method == "OPTIONS":
+        response = jsonify({'status': 'ok'})
+        response.headers.add("Access-Control-Allow-Origin", "*")
+        response.headers.add("Access-Control-Allow-Headers", "Content-Type,Authorization")
+        response.headers.add("Access-Control-Allow-Methods", "POST,OPTIONS")
+        return response
+    
+    try:
+        data = request.get_json()
+        exam_code = data.get('exam_code', '').upper()
+        participant_name = data.get('participant_name', '')
+        
+        if not exam_code or not participant_name:
+            return jsonify({"success": False, "error": "Missing exam_code or participant_name"}), 400
+        
+        # Remove participant from exam
+        result = db.exams.update_one(
+            {"exam_code": exam_code},
+            {"$pull": {"participants": {"name": participant_name}}}
+        )
+        
+        if result.modified_count > 0:
+            print(f"🗑️ Host removed participant {participant_name} from exam {exam_code}")
+            return jsonify({"success": True, "message": f"Participant {participant_name} removed successfully"})
+        else:
+            return jsonify({"success": False, "error": "Participant not found or already removed"}), 404
+            
+    except Exception as e:
+        print(f"❌ Error removing participant: {str(e)}")
+        return jsonify({"success": False, "error": str(e)}), 500
+
+@bp.route('/stop-exam', methods=['POST', 'OPTIONS'])
+def stop_exam():
+    """Stop an exam early (host only)"""
+    if request.method == "OPTIONS":
+        response = jsonify({'status': 'ok'})
+        response.headers.add("Access-Control-Allow-Origin", "*")
+        response.headers.add("Access-Control-Allow-Headers", "Content-Type,Authorization")
+        response.headers.add("Access-Control-Allow-Methods", "POST,OPTIONS")
+        return response
+    
+    try:
+        data = request.get_json()
+        exam_code = data.get('exam_code', '').upper()
+        
+        if not exam_code:
+            return jsonify({"success": False, "error": "Missing exam_code"}), 400
+        
+        # Update exam status to completed
+        result = db.exams.update_one(
+            {"exam_code": exam_code},
+            {"$set": {
+                "status": "completed", 
+                "ended_at": datetime.now().isoformat(),
+                "ended_by": "host"
+            }}
+        )
+        
+        if result.modified_count > 0:
+            print(f"🛑 Exam {exam_code} stopped early by host")
+            return jsonify({"success": True, "message": "Exam stopped successfully"})
+        else:
+            return jsonify({"success": False, "error": "Exam not found"}), 404
+            
+    except Exception as e:
+        print(f"❌ Error stopping exam: {str(e)}")
+        return jsonify({"success": False, "error": str(e)}), 500
+
 @bp.route("/debug-join-data", methods=["POST", "OPTIONS"])
 def debug_join_data():
     """Debug what data is actually being received"""
@@ -493,6 +633,10 @@ def test_exam_route():
             "/api/exam/leaderboard/<exam_code>",
             "/api/exam/get-problem/<exam_code>",
             "/api/exam/host-dashboard/<exam_code>",
+            "/api/exam/info/<exam_code>",
+            "/api/exam/participants/<exam_code>",
+            "/api/exam/remove-participant",
+            "/api/exam/stop-exam",
             "/api/exam/debug-join-data"
         ]
     })
@@ -509,7 +653,54 @@ def exam_root():
             "/api/exam/leaderboard/<exam_code>",
             "/api/exam/get-problem/<exam_code>",
             "/api/exam/host-dashboard/<exam_code>",
+            "/api/exam/info/<exam_code>",
+            "/api/exam/participants/<exam_code>",
+            "/api/exam/remove-participant",
+            "/api/exam/stop-exam",
             "/api/exam/test",
             "/api/exam/debug-join-data"
         ]
     })
+@bp.route('/info/<exam_code>', methods=['GET', 'OPTIONS'])
+def get_exam_info(exam_code):
+    """Get detailed information about an exam for the host panel"""
+    if request.method == "OPTIONS":
+        response = jsonify({'status': 'ok'})
+        response.headers.add("Access-Control-Allow-Origin", "*")
+        response.headers.add("Access-Control-Allow-Headers", "Content-Type,Authorization")
+        response.headers.add("Access-Control-Allow-Methods", "GET,OPTIONS")
+        return response
+    
+    try:
+        print(f"📊 Host panel requesting info for exam: {exam_code}")
+        
+        exam = db.exams.find_one({"exam_code": exam_code.upper()})
+        if not exam:
+            print(f"❌ Exam not found: {exam_code}")
+            return jsonify({"success": False, "error": "Exam not found"}), 404
+        
+        # Convert datetime objects to strings for JSON serialization
+        created_at = exam.get("created_at")
+        if hasattr(created_at, 'isoformat'):
+            created_at = created_at.isoformat()
+        
+        exam_info = {
+            "title": exam["title"],
+            "status": exam["status"],
+            "duration_minutes": exam["duration_minutes"],
+            "participants_count": len(exam.get("participants", [])),
+            "max_participants": exam.get("max_participants", 50),
+            "problem_title": exam.get("problem", {}).get("title", exam["title"]),
+            "languages": exam.get("problem", {}).get("languages", ["python"]),
+            "created_at": created_at,
+            "host_name": exam["host_name"]
+        }
+        
+        print(f"✅ Found exam: {exam['title']} (Status: {exam['status']})")
+        return jsonify({"success": True, "exam_info": exam_info})
+        
+    except Exception as e:
+        print(f"❌ Error getting exam info: {str(e)}")
+        import traceback
+        traceback.print_exc()
+        return jsonify({"success": False, "error": str(e)}), 500

frontend/app/coding/host/[examCode]/page.tsx

@@ -1,87 +1,114 @@
 'use client'
 import React, { useState, useEffect } from 'react'
-import { useParams, useRouter } from 'next/navigation'
+import { useRouter, useParams } from 'next/navigation'
 import { 
-  Users, Trophy, Clock, Play, Square, UserX, AlertTriangle, 
+  Users, 
-  RefreshCw, Settings, BarChart, Eye, Trash2, Plus, Timer
+  Trophy, 
+  Clock, 
+  Play, 
+  Pause, 
+  Square, 
+  UserMinus, 
+  RefreshCw,
+  Settings,
+  Monitor,
+  AlertCircle
 } from 'lucide-react'
 
 interface Participant {
   name: string
-  joined_at: string
   score: number
   completed: boolean
-  language?: string
+  submitted_at?: string
-  submission_time?: string
+  joined_at: string
-  rank?: number
-  kicked?: boolean
 }
 
-interface ExamData {
+interface ExamInfo {
-  exam_info: {
-    exam_code: string
   title: string
-    status: string
+  status: 'waiting' | 'active' | 'completed'
   duration_minutes: number
+  participants_count: number
   max_participants: number
-    time_elapsed: number
+  problem_title: string
-    time_remaining: number
+  languages: string[]
-    start_time?: string
+  created_at: string
-    end_time?: string
+  host_name: string
-  }
-  participants: {
-    total: number
-    completed: number
-    working: number
-    all_participants: Participant[]
-    recent_joins: Participant[]
-  }
-  leaderboard: Participant[]
-  statistics: {
-    average_score: number
-    highest_score: number
-    lowest_score: number
-    completion_rate: number
-  }
 }
 
-export default function HostDashboard() {
+export default function HostPanel() {
   const params = useParams()
   const router = useRouter()
   const examCode = params.examCode as string
 
-  const [examData, setExamData] = useState<ExamData | null>(null)
+  const [examInfo, setExamInfo] = useState<ExamInfo | null>(null)
+  const [participants, setParticipants] = useState<Participant[]>([])
+  const [leaderboard, setLeaderboard] = useState<Participant[]>([])
+  const [timeRemaining, setTimeRemaining] = useState(0)
   const [loading, setLoading] = useState(true)
-  const [activeTab, setActiveTab] = useState<'overview' | 'participants' | 'leaderboard' | 'settings'>('overview')
+  const [error, setError] = useState('')
-  const [selectedParticipant, setSelectedParticipant] = useState<string | null>(null)
-  const [showKickModal, setShowKickModal] = useState(false)
-  const [refreshInterval, setRefreshInterval] = useState(3000) // 3 seconds
 
   useEffect(() => {
-    if (!examCode) return
+    if (examCode) {
+      fetchExamInfo()
+      fetchParticipants()
+      fetchLeaderboard()
+      
+      // Auto-refresh every 5 seconds
+      const interval = setInterval(() => {
+        fetchParticipants()
+        fetchLeaderboard()
+      }, 5000)
 
-    fetchDashboardData()
-    const interval = setInterval(fetchDashboardData, refreshInterval)
       return () => clearInterval(interval)
-  }, [examCode, refreshInterval])
+    }
+  }, [examCode])
 
-  const fetchDashboardData = async () => {
+  const fetchExamInfo = async () => {
     try {
-      const response = await fetch(`http://127.0.0.1:5000/api/exam/host-dashboard/${examCode}`)
+      const response = await fetch(`http://127.0.0.1:5000/api/exam/info/${examCode}`)
       const data = await response.json()
       
       if (data.success) {
-        setExamData(data)
+        setExamInfo(data.exam_info)
+        if (data.exam_info.status === 'active') {
+          startTimer(data.exam_info.duration_minutes * 60)
+        }
       } else {
-        console.error('Failed to fetch dashboard data:', data.error)
+        setError('Failed to load exam information')
       }
     } catch (error) {
-      console.error('Error fetching dashboard data:', error)
+      setError('Network error')
     } finally {
       setLoading(false)
     }
   }
 
+  const fetchParticipants = async () => {
+    try {
+      const response = await fetch(`http://127.0.0.1:5000/api/exam/participants/${examCode}`)
+      const data = await response.json()
+      
+      if (data.success) {
+        setParticipants(data.participants)
+      }
+    } catch (error) {
+      console.error('Failed to fetch participants')
+    }
+  }
+
+  const fetchLeaderboard = async () => {
+    try {
+      const response = await fetch(`http://127.0.0.1:5000/api/exam/leaderboard/${examCode}`)
+      const data = await response.json()
+      
+      if (data.success) {
+        setLeaderboard(data.leaderboard)
+      }
+    } catch (error) {
+      console.error('Failed to fetch leaderboard')
+    }
+  }
+
   const startExam = async () => {
     try {
       const response = await fetch('http://127.0.0.1:5000/api/exam/start-exam', {
@@ -92,21 +119,20 @@ export default function HostDashboard() {
       
       const data = await response.json()
       if (data.success) {
-        alert('Exam started successfully!')
+        setExamInfo(prev => prev ? { ...prev, status: 'active' } : null)
-        fetchDashboardData()
+        startTimer(examInfo?.duration_minutes ? examInfo.duration_minutes * 60 : 1800)
+        alert('✅ Exam started! Participants can now begin coding.')
       } else {
-        alert(`Failed to start exam: ${data.error}`)
+        alert(`❌ Failed to start exam: ${data.error}`)
       }
     } catch (error) {
-      alert('Failed to start exam')
+      alert('❌ Network error occurred')
     }
   }
 
-  const endExam = async () => {
+  const stopExam = async () => {
-    if (!confirm('Are you sure you want to end the exam? This cannot be undone.')) return
-
     try {
-      const response = await fetch('http://127.0.0.1:5000/api/exam/end-exam', {
+      const response = await fetch('http://127.0.0.1:5000/api/exam/stop-exam', {
         method: 'POST',
         headers: { 'Content-Type': 'application/json' },
         body: JSON.stringify({ exam_code: examCode })
@@ -114,41 +140,21 @@ export default function HostDashboard() {
       
       const data = await response.json()
       if (data.success) {
-        alert('Exam ended successfully!')
+        setExamInfo(prev => prev ? { ...prev, status: 'completed' } : null)
-        fetchDashboardData()
+        setTimeRemaining(0)
+        alert('🛑 Exam stopped successfully!')
       } else {
-        alert(`Failed to end exam: ${data.error}`)
+        alert(`❌ Failed to stop exam: ${data.error}`)
       }
     } catch (error) {
-      alert('Failed to end exam')
+      alert('❌ Network error occurred')
-    }
-  }
-
-  const extendExam = async (minutes: number) => {
-    try {
-      const response = await fetch('http://127.0.0.1:5000/api/exam/extend-exam', {
-        method: 'POST',
-        headers: { 'Content-Type': 'application/json' },
-        body: JSON.stringify({ 
-          exam_code: examCode,
-          additional_minutes: minutes
-        })
-      })
-
-      const data = await response.json()
-      if (data.success) {
-        alert(`Exam extended by ${minutes} minutes!`)
-        fetchDashboardData()
-      } else {
-        alert(`Failed to extend exam: ${data.error}`)
-      }
-    } catch (error) {
-      alert('Failed to extend exam')
     }
   }
 
   const removeParticipant = async (participantName: string) => {
-    if (!confirm(`Are you sure you want to remove "${participantName}" from the exam?`)) return
+    if (!confirm(`Are you sure you want to remove "${participantName}" from the exam?`)) {
+      return
+    }
 
     try {
       const response = await fetch('http://127.0.0.1:5000/api/exam/remove-participant', {
@@ -162,18 +168,33 @@ export default function HostDashboard() {
       
       const data = await response.json()
       if (data.success) {
-        alert(`Participant "${participantName}" removed successfully!`)
+        alert(`✅ Removed "${participantName}" from the exam`)
-        fetchDashboardData()
+        fetchParticipants()
-        setShowKickModal(false)
+        fetchLeaderboard()
-        setSelectedParticipant(null)
       } else {
-        alert(`Failed to remove participant: ${data.error}`)
+        alert(`❌ Failed to remove participant: ${data.error}`)
       }
     } catch (error) {
-      alert('Failed to remove participant')
+      alert('❌ Network error occurred')
     }
   }
 
+  const startTimer = (seconds: number) => {
+    setTimeRemaining(seconds)
+    
+    const timer = setInterval(() => {
+      setTimeRemaining(prev => {
+        if (prev <= 1) {
+          clearInterval(timer)
+          alert('⏰ Time is up! Exam has ended.')
+          setExamInfo(prev => prev ? { ...prev, status: 'completed' } : null)
+          return 0
+        }
+        return prev - 1
+      })
+    }, 1000)
+  }
+
   const formatTime = (seconds: number) => {
     const mins = Math.floor(seconds / 60)
     const secs = seconds % 60
@@ -182,10 +203,10 @@ export default function HostDashboard() {
 
   const getStatusColor = (status: string) => {
     switch (status) {
-      case 'waiting': return 'bg-yellow-100 text-yellow-800'
+      case 'waiting': return 'bg-yellow-600'
-      case 'active': return 'bg-green-100 text-green-800'
+      case 'active': return 'bg-green-600'
-      case 'completed': return 'bg-gray-100 text-gray-800'
+      case 'completed': return 'bg-red-600'
-      default: return 'bg-gray-100 text-gray-800'
+      default: return 'bg-gray-600'
     }
   }
 
@@ -193,25 +214,25 @@ export default function HostDashboard() {
     return (
       <div className="min-h-screen bg-gray-900 text-white flex items-center justify-center">
         <div className="text-center">
-          <div className="animate-spin rounded-full h-8 w-8 border-b-2 border-blue-600 mx-auto"></div>
+          <RefreshCw className="h-8 w-8 animate-spin mx-auto mb-4" />
-          <p className="mt-2 text-gray-400">Loading host dashboard...</p>
+          <p>Loading host panel...</p>
         </div>
       </div>
     )
   }
 
-  if (!examData) {
+  if (error || !examInfo) {
     return (
       <div className="min-h-screen bg-gray-900 text-white flex items-center justify-center">
         <div className="text-center">
-          <AlertTriangle className="h-12 w-12 text-red-400 mx-auto mb-4" />
+          <AlertCircle className="h-12 w-12 text-red-500 mx-auto mb-4" />
-          <h2 className="text-xl font-bold mb-2">Exam Not Found</h2>
+          <h1 className="text-2xl font-bold mb-2">Error</h1>
-          <p className="text-gray-400">The exam code "{examCode}" is invalid or expired.</p>
+          <p className="text-gray-400 mb-4">{error || 'Exam not found'}</p>
           <button
-            onClick={() => router.push('/coding/create')}
+            onClick={() => router.push('/coding')}
-            className="mt-4 bg-blue-600 hover:bg-blue-700 px-4 py-2 rounded"
+            className="bg-blue-600 hover:bg-blue-700 px-6 py-2 rounded"
           >
-            Create New Exam
+            Back to Home
           </button>
         </div>
       </div>
@@ -221,377 +242,247 @@ export default function HostDashboard() {
   return (
     <div className="min-h-screen bg-gray-900 text-white">
       {/* Header */}
-      <div className="bg-gray-800 border-b border-gray-700 p-6">
+      <div className="bg-gray-800 border-b border-gray-700 p-4">
-        <div className="max-w-7xl mx-auto">
+        <div className="flex items-center justify-between">
-          <div className="flex justify-between items-center">
           <div>
-              <h1 className="text-2xl font-bold">{examData.exam_info.title}</h1>
+            <h1 className="text-2xl font-bold flex items-center space-x-2">
-              <div className="flex items-center space-x-4 mt-2">
+              <Monitor className="h-6 w-6" />
-                <span className="text-lg font-mono font-bold text-blue-400">
+              <span>Host Panel</span>
-                  CODE: {examData.exam_info.exam_code}
+            </h1>
-                </span>
+            <p className="text-gray-400">Managing exam: {examCode}</p>
-                <span className={`px-3 py-1 rounded-full text-sm font-medium ${getStatusColor(examData.exam_info.status)}`}>
-                  {examData.exam_info.status.toUpperCase()}
-                </span>
-                <span className="text-gray-400">
-                  {examData.participants.total}/{examData.exam_info.max_participants} participants
-                </span>
-              </div>
           </div>
           
           <div className="flex items-center space-x-4">
-              {/* Timer */}
+            <div className={`px-3 py-1 rounded-full text-sm font-medium ${getStatusColor(examInfo.status)}`}>
-              {examData.exam_info.status === 'active' && examData.exam_info.time_remaining > 0 && (
+              {examInfo.status.toUpperCase()}
-                <div className="flex items-center space-x-2 bg-red-900 px-4 py-2 rounded-lg">
+            </div>
-                  <Clock className="h-5 w-5 text-red-400" />
+            
-                  <span className="font-mono text-lg">{formatTime(examData.exam_info.time_remaining)}</span>
+            {timeRemaining > 0 && (
+              <div className="flex items-center space-x-2 bg-gray-700 px-3 py-1 rounded">
+                <Clock className="h-4 w-4" />
+                <span className="font-mono text-lg">{formatTime(timeRemaining)}</span>
               </div>
             )}
+          </div>
+        </div>
+      </div>
 
-              {/* Control Buttons */}
+      <div className="flex">
-              {examData.exam_info.status === 'waiting' && (
+        {/* Main Content */}
+        <div className="flex-1 p-6">
+          {/* Exam Info Cards */}
+          <div className="grid grid-cols-1 md:grid-cols-4 gap-6 mb-8">
+            <div className="bg-gray-800 rounded-lg p-6">
+              <div className="flex items-center space-x-3">
+                <Users className="h-8 w-8 text-blue-400" />
+                <div>
+                  <p className="text-sm text-gray-400">Participants</p>
+                  <p className="text-2xl font-bold">{examInfo.participants_count}/{examInfo.max_participants}</p>
+                </div>
+              </div>
+            </div>
+
+            <div className="bg-gray-800 rounded-lg p-6">
+              <div className="flex items-center space-x-3">
+                <Clock className="h-8 w-8 text-green-400" />
+                <div>
+                  <p className="text-sm text-gray-400">Duration</p>
+                  <p className="text-2xl font-bold">{examInfo.duration_minutes}m</p>
+                </div>
+              </div>
+            </div>
+
+            <div className="bg-gray-800 rounded-lg p-6">
+              <div className="flex items-center space-x-3">
+                <Trophy className="h-8 w-8 text-yellow-400" />
+                <div>
+                  <p className="text-sm text-gray-400">Completed</p>
+                  <p className="text-2xl font-bold">{leaderboard.filter(p => p.completed).length}</p>
+                </div>
+              </div>
+            </div>
+
+            <div className="bg-gray-800 rounded-lg p-6">
+              <div className="flex items-center space-x-3">
+                <Settings className="h-8 w-8 text-purple-400" />
+                <div>
+                  <p className="text-sm text-gray-400">Problem</p>
+                  <p className="text-lg font-bold">{examInfo.problem_title}</p>
+                </div>
+              </div>
+            </div>
+          </div>
+
+          {/* Control Panel */}
+          <div className="bg-gray-800 rounded-lg p-6 mb-8">
+            <h2 className="text-xl font-bold mb-4">Exam Controls</h2>
+            
+            <div className="flex space-x-4">
+              {examInfo.status === 'waiting' && (
                 <button
                   onClick={startExam}
-                  className="bg-green-600 hover:bg-green-700 px-4 py-2 rounded-lg flex items-center space-x-2"
+                  className="bg-green-600 hover:bg-green-700 px-6 py-2 rounded flex items-center space-x-2"
                 >
                   <Play className="h-4 w-4" />
                   <span>Start Exam</span>
                 </button>
               )}
 
-              {examData.exam_info.status === 'active' && (
+              {examInfo.status === 'active' && (
-                <div className="flex space-x-2">
+                <>
                   <button
-                    onClick={() => extendExam(10)}
+                    onClick={stopExam}
-                    className="bg-yellow-600 hover:bg-yellow-700 px-3 py-2 rounded flex items-center space-x-1"
+                    className="bg-red-600 hover:bg-red-700 px-6 py-2 rounded flex items-center space-x-2"
-                  >
-                    <Timer className="h-4 w-4" />
-                    <span>+10min</span>
-                  </button>
-                  <button
-                    onClick={endExam}
-                    className="bg-red-600 hover:bg-red-700 px-4 py-2 rounded-lg flex items-center space-x-2"
                   >
                     <Square className="h-4 w-4" />
-                    <span>End Exam</span>
+                    <span>Stop Exam</span>
                   </button>
-                </div>
+                </>
               )}
 
               <button
-                onClick={fetchDashboardData}
+                onClick={() => {
-                className="p-2 text-gray-400 hover:text-white hover:bg-gray-700 rounded"
+                  fetchParticipants()
-                title="Refresh"
+                  fetchLeaderboard()
+                }}
+                className="bg-blue-600 hover:bg-blue-700 px-6 py-2 rounded flex items-center space-x-2"
               >
                 <RefreshCw className="h-4 w-4" />
+                <span>Refresh Data</span>
               </button>
-            </div>
-          </div>
-        </div>
-      </div>
 
-      <div className="max-w-7xl mx-auto p-6">
-        {/* Tab Navigation */}
-        <div className="flex space-x-1 mb-6">
-          {[
-            { id: 'overview', label: 'Overview', icon: BarChart },
-            { id: 'participants', label: 'Participants', icon: Users },
-            { id: 'leaderboard', label: 'Leaderboard', icon: Trophy },
-            { id: 'settings', label: 'Settings', icon: Settings }
-          ].map(tab => (
               <button
-              key={tab.id}
+                onClick={() => {
-              onClick={() => setActiveTab(tab.id as any)}
+                  navigator.clipboard.writeText(examCode)
-              className={`px-4 py-2 rounded-lg flex items-center space-x-2 transition-colors ${
+                  alert('Exam code copied to clipboard!')
-                activeTab === tab.id
+                }}
-                  ? 'bg-blue-600 text-white'
+                className="bg-purple-600 hover:bg-purple-700 px-6 py-2 rounded"
-                  : 'bg-gray-800 text-gray-400 hover:text-white hover:bg-gray-700'
-              }`}
               >
-              <tab.icon className="h-4 w-4" />
+                Copy Exam Code
-              <span>{tab.label}</span>
               </button>
-          ))}
-        </div>
-
-        {/* Tab Content */}
-        {activeTab === 'overview' && (
-          <div className="space-y-6">
-            {/* Statistics Cards */}
-            <div className="grid grid-cols-1 md:grid-cols-4 gap-6">
-              <div className="bg-gray-800 p-6 rounded-lg">
-                <div className="flex items-center justify-between">
-                  <div>
-                    <h3 className="text-sm font-medium text-gray-400">Total Participants</h3>
-                    <p className="text-3xl font-bold text-blue-400">{examData.participants.total}</p>
-                  </div>
-                  <Users className="h-8 w-8 text-blue-400" />
             </div>
           </div>
 
-              <div className="bg-gray-800 p-6 rounded-lg">
+          {/* Participants List */}
-                <div className="flex items-center justify-between">
-                  <div>
-                    <h3 className="text-sm font-medium text-gray-400">Completed</h3>
-                    <p className="text-3xl font-bold text-green-400">{examData.participants.completed}</p>
-                  </div>
-                  <Trophy className="h-8 w-8 text-green-400" />
-                </div>
-              </div>
-
-              <div className="bg-gray-800 p-6 rounded-lg">
-                <div className="flex items-center justify-between">
-                  <div>
-                    <h3 className="text-sm font-medium text-gray-400">Still Working</h3>
-                    <p className="text-3xl font-bold text-yellow-400">{examData.participants.working}</p>
-                  </div>
-                  <Clock className="h-8 w-8 text-yellow-400" />
-                </div>
-              </div>
-
-              <div className="bg-gray-800 p-6 rounded-lg">
-                <div className="flex items-center justify-between">
-                  <div>
-                    <h3 className="text-sm font-medium text-gray-400">Average Score</h3>
-                    <p className="text-3xl font-bold text-purple-400">
-                      {Math.round(examData.statistics.average_score)}%
-                    </p>
-                  </div>
-                  <BarChart className="h-8 w-8 text-purple-400" />
-                </div>
-              </div>
-            </div>
-
-            {/* Recent Activity */}
           <div className="bg-gray-800 rounded-lg p-6">
-              <h3 className="text-lg font-bold mb-4">Recent Participants</h3>
+            <h2 className="text-xl font-bold mb-4 flex items-center space-x-2">
-              <div className="space-y-2">
+              <Users className="h-5 w-5" />
-                {examData.participants.recent_joins.slice(0, 5).map((participant, index) => (
+              <span>Participants ({participants.length})</span>
-                  <div key={participant.name} className="flex items-center justify-between p-3 bg-gray-700 rounded">
+            </h2>
-                    <div className="flex items-center space-x-3">
-                      <div className="w-8 h-8 bg-blue-600 rounded-full flex items-center justify-center text-sm font-bold">
-                        {participant.name.charAt(0).toUpperCase()}
-                      </div>
-                      <div>
-                        <div className="font-medium">{participant.name}</div>
-                        <div className="text-sm text-gray-400">
-                          Joined {new Date(participant.joined_at).toLocaleTimeString()}
-                        </div>
-                      </div>
-                    </div>
-                    <div className="text-right">
-                      <div className={`px-2 py-1 rounded text-xs ${
-                        participant.completed ? 'bg-green-900 text-green-200' : 'bg-yellow-900 text-yellow-200'
-                      }`}>
-                        {participant.completed ? `${participant.score}% completed` : 'Working'}
-                      </div>
-                    </div>
-                  </div>
-                ))}
-              </div>
-            </div>
-          </div>
-        )}
-
-        {activeTab === 'participants' && (
-          <div className="bg-gray-800 rounded-lg overflow-hidden">
-            <div className="p-6 border-b border-gray-700">
-              <div className="flex justify-between items-center">
-                <h3 className="text-lg font-bold">All Participants ({examData.participants.total})</h3>
-                <div className="text-sm text-gray-400">
-                  Completion Rate: {Math.round(examData.statistics.completion_rate)}%
-                </div>
-              </div>
-            </div>
             
             <div className="overflow-x-auto">
               <table className="w-full">
-                <thead className="bg-gray-700">
+                <thead>
-                  <tr>
+                  <tr className="border-b border-gray-700">
-                    <th className="px-6 py-3 text-left text-xs font-medium text-gray-300 uppercase tracking-wider">Participant</th>
+                    <th className="text-left py-3 px-4">Name</th>
-                    <th className="px-6 py-3 text-left text-xs font-medium text-gray-300 uppercase tracking-wider">Status</th>
+                    <th className="text-left py-3 px-4">Joined At</th>
-                    <th className="px-6 py-3 text-left text-xs font-medium text-gray-300 uppercase tracking-wider">Score</th>
+                    <th className="text-left py-3 px-4">Status</th>
-                    <th className="px-6 py-3 text-left text-xs font-medium text-gray-300 uppercase tracking-wider">Language</th>
+                    <th className="text-left py-3 px-4">Score</th>
-                    <th className="px-6 py-3 text-left text-xs font-medium text-gray-300 uppercase tracking-wider">Joined</th>
+                    <th className="text-left py-3 px-4">Actions</th>
-                    <th className="px-6 py-3 text-left text-xs font-medium text-gray-300 uppercase tracking-wider">Actions</th>
                   </tr>
                 </thead>
-                <tbody className="divide-y divide-gray-700">
+                <tbody>
-                  {examData.participants.all_participants.map((participant) => (
+                  {participants.map((participant, index) => (
-                    <tr key={participant.name} className="hover:bg-gray-700">
+                    <tr key={index} className="border-b border-gray-700 hover:bg-gray-700">
-                      <td className="px-6 py-4 whitespace-nowrap">
+                      <td className="py-3 px-4 font-medium">{participant.name}</td>
-                        <div className="flex items-center">
+                      <td className="py-3 px-4 text-gray-400">
-                          <div className="w-8 h-8 bg-blue-600 rounded-full flex items-center justify-center text-sm font-bold mr-3">
+                        {new Date(participant.joined_at).toLocaleTimeString()}
-                            {participant.name.charAt(0).toUpperCase()}
-                          </div>
-                          <div className="font-medium">{participant.name}</div>
-                        </div>
                       </td>
-                      <td className="px-6 py-4 whitespace-nowrap">
+                      <td className="py-3 px-4">
-                        <span className={`px-2 py-1 rounded-full text-xs font-medium ${
+                        <span className={`px-2 py-1 rounded text-xs ${
                           participant.completed 
-                            ? 'bg-green-900 text-green-200' 
+                            ? 'bg-green-600 text-white' 
-                            : participant.kicked
+                            : 'bg-yellow-600 text-white'
-                            ? 'bg-red-900 text-red-200'
-                            : 'bg-yellow-900 text-yellow-200'
                         }`}>
-                          {participant.kicked ? 'Kicked' : participant.completed ? 'Completed' : 'Working'}
+                          {participant.completed ? 'Completed' : 'In Progress'}
                         </span>
                       </td>
-                      <td className="px-6 py-4 whitespace-nowrap text-sm text-gray-300">
+                      <td className="py-3 px-4">
-                        {participant.completed ? `${participant.score}%` : '-'}
+                        {participant.completed ? (
+                          <span className="font-bold text-green-400">{participant.score}%</span>
+                        ) : (
+                          <span className="text-gray-500">-</span>
+                        )}
                       </td>
-                      <td className="px-6 py-4 whitespace-nowrap text-sm text-gray-300">
+                      <td className="py-3 px-4">
-                        {participant.language || '-'}
-                      </td>
-                      <td className="px-6 py-4 whitespace-nowrap text-sm text-gray-300">
-                        {new Date(participant.joined_at).toLocaleString()}
-                      </td>
-                      <td className="px-6 py-4 whitespace-nowrap text-sm font-medium">
-                        <div className="flex space-x-2">
                         <button
-                            onClick={() => {
+                          onClick={() => removeParticipant(participant.name)}
-                              setSelectedParticipant(participant.name)
+                          className="bg-red-600 hover:bg-red-700 px-3 py-1 rounded text-sm flex items-center space-x-1"
-                              setShowKickModal(true)
-                            }}
-                            className="text-red-400 hover:text-red-300"
-                            title="Remove Participant"
                         >
-                            <UserX className="h-4 w-4" />
+                          <UserMinus className="h-3 w-3" />
+                          <span>Remove</span>
                         </button>
-                        </div>
                       </td>
                     </tr>
                   ))}
                 </tbody>
               </table>
-            </div>
+              
+              {participants.length === 0 && (
+                <div className="text-center py-8 text-gray-400">
+                  No participants have joined yet.
                 </div>
               )}
+            </div>
+          </div>
+        </div>
+
+        {/* Leaderboard Sidebar */}
+        <div className="w-80 bg-gray-800 p-6">
+          <div className="flex items-center space-x-2 mb-6">
+            <Trophy className="h-6 w-6 text-yellow-400" />
+            <h2 className="text-xl font-bold">Live Leaderboard</h2>
+          </div>
           
-        {activeTab === 'leaderboard' && (
-          <div className="bg-gray-800 rounded-lg p-6">
-            <h3 className="text-lg font-bold mb-6">Live Leaderboard</h3>
           <div className="space-y-3">
-              {examData.leaderboard.map((participant, index) => {
+            {leaderboard.map((participant, index) => (
-                const rankColors = {
-                  1: 'bg-gradient-to-r from-yellow-600 to-yellow-500 text-white',
-                  2: 'bg-gradient-to-r from-gray-400 to-gray-500 text-white',
-                  3: 'bg-gradient-to-r from-orange-600 to-orange-500 text-white'
-                }
-                
-                return (
               <div 
-                    key={participant.name}
+                key={index} 
                 className={`p-4 rounded-lg ${
-                      rankColors[participant.rank as keyof typeof rankColors] || 'bg-gray-700'
+                  index === 0 ? 'bg-gradient-to-r from-yellow-600 to-orange-600' :
+                  index === 1 ? 'bg-gradient-to-r from-gray-600 to-gray-500' :
+                  index === 2 ? 'bg-gradient-to-r from-orange-600 to-red-600' :
+                  'bg-gray-700'
                 }`}
               >
-                    <div className="flex items-center justify-between">
+                <div className="flex justify-between items-center">
-                      <div className="flex items-center space-x-4">
-                        <div className="text-2xl font-bold">#{participant.rank}</div>
                   <div>
-                          <div className="font-bold text-lg">{participant.name}</div>
+                    <div className="flex items-center space-x-2">
-                          <div className="text-sm opacity-75">
+                      <span className="font-bold text-lg">#{index + 1}</span>
-                            {participant.language && `${participant.language} • `}
+                      <span className="font-medium">{participant.name}</span>
-                            Submitted: {new Date(participant.submission_time!).toLocaleTimeString()}
-                          </div>
                     </div>
+                    {participant.submitted_at && (
+                      <p className="text-xs text-gray-300 mt-1">
+                        Submitted: {new Date(participant.submitted_at).toLocaleTimeString()}
+                      </p>
+                    )}
                   </div>
                   <div className="text-right">
                     <div className="text-2xl font-bold">{participant.score}%</div>
+                    <div className={`text-xs ${participant.completed ? 'text-green-300' : 'text-yellow-300'}`}>
+                      {participant.completed ? 'Completed' : 'In Progress'}
                     </div>
                   </div>
                 </div>
-                )
-              })}
               </div>
+            ))}
+          </div>
+          
+          {leaderboard.length === 0 && (
+            <div className="text-center py-8 text-gray-400">
+              No submissions yet.
             </div>
           )}
           
-        {activeTab === 'settings' && (
-          <div className="space-y-6">
-            <div className="bg-gray-800 rounded-lg p-6">
-              <h3 className="text-lg font-bold mb-4">Exam Controls</h3>
-              <div className="grid grid-cols-1 md:grid-cols-2 gap-4">
           <button
-                  onClick={() => extendExam(5)}
+            onClick={fetchLeaderboard}
-                  disabled={examData.exam_info.status !== 'active'}
+            className="w-full mt-6 bg-blue-600 hover:bg-blue-700 px-4 py-2 rounded text-sm flex items-center justify-center space-x-2"
-                  className="bg-yellow-600 hover:bg-yellow-700 disabled:bg-gray-600 px-4 py-2 rounded text-left"
           >
-                  <div className="font-medium">Extend by 5 minutes</div>
+            <RefreshCw className="h-4 w-4" />
-                  <div className="text-sm opacity-75">Add more time to the exam</div>
+            <span>Refresh Leaderboard</span>
-                </button>
-
-                <button
-                  onClick={() => extendExam(15)}
-                  disabled={examData.exam_info.status !== 'active'}
-                  className="bg-yellow-600 hover:bg-yellow-700 disabled:bg-gray-600 px-4 py-2 rounded text-left"
-                >
-                  <div className="font-medium">Extend by 15 minutes</div>
-                  <div className="text-sm opacity-75">Add significant extra time</div>
-                </button>
-
-                <button
-                  onClick={endExam}
-                  disabled={examData.exam_info.status !== 'active'}
-                  className="bg-red-600 hover:bg-red-700 disabled:bg-gray-600 px-4 py-2 rounded text-left"
-                >
-                  <div className="font-medium">End Exam Early</div>
-                  <div className="text-sm opacity-75">Stop the exam immediately</div>
           </button>
         </div>
       </div>
-
-            <div className="bg-gray-800 rounded-lg p-6">
-              <h3 className="text-lg font-bold mb-4">Auto-Refresh Settings</h3>
-              <div className="flex items-center space-x-4">
-                <label className="text-sm font-medium">Update Interval:</label>
-                <select
-                  value={refreshInterval}
-                  onChange={(e) => setRefreshInterval(Number(e.target.value))}
-                  className="bg-gray-700 border border-gray-600 rounded px-3 py-1 text-sm"
-                >
-                  <option value={1000}>1 second</option>
-                  <option value={3000}>3 seconds</option>
-                  <option value={5000}>5 seconds</option>
-                  <option value={10000}>10 seconds</option>
-                </select>
-              </div>
-            </div>
-          </div>
-        )}
-      </div>
-
-      {/* Kick Participant Modal */}
-      {showKickModal && selectedParticipant && (
-        <div className="fixed inset-0 bg-black bg-opacity-50 flex items-center justify-center z-50">
-          <div className="bg-gray-800 rounded-lg p-6 w-full max-w-md">
-            <h3 className="text-lg font-bold mb-4">Remove Participant</h3>
-            <p className="text-gray-300 mb-6">
-              Are you sure you want to remove <strong>"{selectedParticipant}"</strong> from the exam?
-              This action cannot be undone.
-            </p>
-            <div className="flex justify-end space-x-3">
-              <button
-                onClick={() => {
-                  setShowKickModal(false)
-                  setSelectedParticipant(null)
-                }}
-                className="px-4 py-2 bg-gray-600 hover:bg-gray-700 rounded"
-              >
-                Cancel
-              </button>
-              <button
-                onClick={() => removeParticipant(selectedParticipant)}
-                className="px-4 py-2 bg-red-600 hover:bg-red-700 rounded"
-              >
-                Remove Participant
-              </button>
-            </div>
-          </div>
-        </div>
-      )}
     </div>
   )
 }

frontend/app/coding/page.tsx

@@ -104,6 +104,7 @@ export default function CodingExamPlatform() {
     }
   }
 
+  // ✅ UPDATED CREATE EXAM WITH HOST PANEL REDIRECT
   const createExam = async () => {
     try {
       const response = await fetch('http://127.0.0.1:5000/api/exam/create-exam', {
@@ -113,7 +114,8 @@ export default function CodingExamPlatform() {
           title: 'String Capitalizer Challenge',
           problem_id: 'string-capitalizer',
           duration_minutes: 30,
-          host_name: participantName
+          host_name: participantName,
+          max_participants: 50
         })
       })
       
@@ -128,14 +130,38 @@ export default function CodingExamPlatform() {
         setExamId(participantCode)
         setExamInfo({ title: 'String Capitalizer Challenge', status: 'waiting' })
         
-        // ✅ FIXED: Show exam_code instead of exam_id
+        // Store host exam data
-        alert(`Exam created! Share this code with participants: ${participantCode}`)
+        localStorage.setItem('host_exam', JSON.stringify({
+          exam_code: participantCode,
+          exam_id: databaseId,
+          host_name: participantName,
+          created_at: new Date().toISOString(),
+          exam_details: data.exam_details || {}
+        }))
+        
+        // ✅ ENHANCED SUCCESS MESSAGE WITH REDIRECT INFO
+        alert(`✅ Exam Created Successfully!
+
+📝 Exam Code: ${participantCode}
+📋 Title: String Capitalizer Challenge
+👤 Host: ${participantName}
+⏱️ Duration: 30 minutes
+
+🔗 Share this code with participants: ${participantCode}
+
+Redirecting to Host Management Panel...`)
+
+        // ✅ REDIRECT TO HOST PANEL
+        setTimeout(() => {
+          router.push(`/coding/host/${participantCode}`)
+        }, 2000)
+        
       } else {
-        alert(`Failed to create exam: ${data.error}`)
+        alert(`❌ Failed to create exam: ${data.error}`)
       }
     } catch (error) {
       console.error('Create exam error:', error)
-      alert('Failed to create exam - network error')
+      alert('❌ Failed to create exam - network error')
     }
   }
 
@@ -316,6 +342,7 @@ Redirecting to exam interface...`)
           <div className="mt-4 p-3 bg-gray-50 rounded text-xs text-gray-600">
             <p>Will create with host_name: "{participantName}"</p>
             <p>✅ Will display exam_code (6 chars), not exam_id</p>
+            <p>🔄 After creation → redirect to /coding/host/[examCode]</p>
           </div>
         </div>
       </div>