⚡ Real-time Leaderboard - Powered by Amazon ElastiCache Serverless for Valkey 8.1

A modern, real-time gaming leaderboard built with Amazon ElastiCache Serverless for Valkey, AWS Lambda, and API Gateway. Features a beautiful, responsive UI with live data persistence and automatic score ranking.

🏗️ Architecture

┌─────────────────────────────────────────────────────────────────────────────┐
│                           VALKEY LEADERBOARD SYSTEM                         │
└─────────────────────────────────────────────────────────────────────────────┘

┌─────────────────┐    ┌──────────────────┐    ┌─────────────────────────────┐
│                 │    │                  │    │                             │
│   API Gateway   │────│  Lambda Function │────│    ElastiCache Valkey       │
│   (HTTP API)    │    │   (Python 3.9)   │    │       Serverless            │
│                 │    │                  │    │                             │
└─────────────────┘    └──────────────────┘    └─────────────────────────────┘
         │                        │                         │
         │                        │                         │
    HTTP Requests            VPC Network              TLS Encryption
         │                        │                         │
         │                        │                         │
┌─────────────────┐    ┌──────────────────┐    ┌─────────────────────────────┐
│                 │    │                  │    │                             │
│ Client Apps     │    │ Security Groups  │    │    Data Structures          │
│ • Web Apps      │    │ • Port 6379      │    │ • Hash: User Profiles       │
│ • Mobile Apps   │    │ • TLS Security   │    │ • Sorted Set: Leaderboard   │
│ • GitHub Pages  │    │ • VPC Isolation  │    │ • String+TTL: Sessions      │
│                 │    │                  │    │                             │
└─────────────────┘    └──────────────────┘    └─────────────────────────────┘

Data Flow:

1. User interacts with web interface (GitHub Pages)
2. API Gateway handles HTTP requests with CORS
3. Lambda processes business logic in VPC
4. ElastiCache Serverless for Valkey stores leaderboard data with TLS
5. Real-time updates flow back through the same path

🚀 Features

• ⚡ Real-time Updates: Live leaderboard with instant score updates
• 🎨 Modern UI: Clean, responsive design with smooth animations
• ☁️ Serverless Architecture: Fully managed AWS infrastructure
• 🔒 Secure: TLS encryption, VPC isolation, CORS configuration
• 📱 Mobile-Friendly: Responsive design works on all devices
• 🎯 Score Validation: Automatic score capping and validation
• 🏆 Live Rankings: Automatic sorting and ranking system

🛠️ Technology Stack

• Frontend: HTML5, CSS3, Vanilla JavaScript
• Backend: AWS Lambda (Python 3.9)
• Database: Amazon ElastiCache Serverless for Valkey 8.1
• API: AWS API Gateway with CORS
• Infrastructure: AWS VPC, Security Groups, TLS

📋 Prerequisites

To deploy your own version, you'll need:

• AWS Account with appropriate permissions
• AWS CLI configured
• Basic knowledge of AWS services (Lambda, API Gateway, ElastiCache)

🚀 Quick Start

1. Clone the Repository

git clone https://github.com/YOUR_USERNAME/valkey-serverless-leaderboard.git
cd valkey-serverless-leaderboard

2. Deploy AWS Infrastructure

1. Create ElastiCache Serverless for Valkey cluster
2. Deploy Lambda function with Valkey connectivity
3. Set up API Gateway with proper CORS configuration
4. Configure VPC and security groups

3. Update Configuration

Edit index.html and replace the API URL:

const API_URL = 'YOUR_API_GATEWAY_URL_HERE'; // Replace with your API Gateway URL

4. Deploy to GitHub Pages

1. Push your code to GitHub
2. Enable GitHub Pages in repository settings
3. Point to index.html as the main page

🎮 Usage

1. Add Scores: Enter player name and score (max 1000 points)
2. View Leaderboard: See real-time rankings with live updates
3. Test Connection: Use the health check to verify connectivity
4. Refresh Data: Manually refresh to see latest scores

🔧 API Endpoints

• GET /health - Health check and connectivity test
• GET /leaderboard - Retrieve current leaderboard
• POST /score - Add or update player score

🏆 Sample Data

The leaderboard comes with realistic sample data:

• Players with varied, realistic names
• Scores distributed between 500-1000 points
• Proper ranking and sorting

🔒 Security Features

• TLS Encryption: All data in transit is encrypted
• VPC Isolation: Database runs in private VPC
• CORS Configuration: Proper cross-origin resource sharing
• Input Validation: Score limits and data validation
• Rate Limiting: API Gateway throttling protection

📱 Responsive Design

• Desktop: Full-featured experience with all controls
• Tablet: Optimized layout with touch-friendly interface
• Mobile: Compact design with essential functionality

🎨 UI Features

• Modern Flat Design: Clean, professional appearance
• Smooth Animations: Hover effects and transitions
• Color-Coded Rankings: Visual distinction for top players
• Loading States: Clear feedback during operations
• Error Handling: User-friendly error messages

🚀 Performance

• Sub-millisecond Queries: Valkey's high-performance data structure
• Serverless Scaling: Automatic scaling based on demand
• CDN Delivery: Fast content delivery via GitHub Pages
• Optimized Code: Minimal JavaScript for fast loading

📊 Monitoring

• Real-time Logs: CloudWatch integration for monitoring
• Health Checks: Built-in connectivity testing
• Error Tracking: Comprehensive error logging
• Performance Metrics: Response time and throughput tracking

🤝 Contributing

1. Fork the repository
2. Create a feature branch
3. Make your changes
4. Test thoroughly
5. Submit a pull request

📄 License

This project is licensed under the MIT License - see the LICENSE file for details.

🙏 Acknowledgments

• Amazon Web Services for the robust cloud infrastructure
• Valkey Community for the high-performance data store
• Open Source Community for inspiration and best practices

📞 Support

For questions or issues:

1. Check the documentation in this repository
2. Review AWS ElastiCache Serverless documentation
3. Open an issue on GitHub

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Built with ❤️ using Amazon ElastiCache Serverless for Valkey 8.1