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 # Monaco Code Execution Engine
-Monaco is a secure, containerized code execution engine that allows you to run code in multiple programming languages through a simple REST API.
+
+Monaco is a secure, containerized code execution engine that allows you to run code in multiple programming languages through a simple REST API and WebSocket connections for real-time terminal interaction.
 
 ## Features
-- Multi-language support: Run code in Python, Java, C, and C++
-- Secure execution: All code runs in isolated Docker containers
-- Resource limits: Memory, CPU, and file descriptor limits to prevent abuse
-- Concurrent processing: Efficient job queue for handling multiple requests
-- Simple REST API: Easy to integrate with any frontend
+
+- **Multi-language support**: Run code in Python, Java, C, and C++
+- **Secure execution**: All code runs in isolated Docker containers
+- **Resource limits**: Memory, CPU, and file descriptor limits to prevent abuse
+- **Concurrent processing**: Efficient job queue for handling multiple requests
+- **Simple REST API**: Easy to integrate with any frontend
+- **Interactive terminal**: Real-time code execution with input/output via WebSockets
+- **VS Code-like interface**: Modern editor with syntax highlighting and file management
 
 ## Architecture
+
 Monaco consists of several components:
 
-- HTTP Handlers (handler/handler.go): Processes API requests
-- Execution Service (service/execution.go): Manages code execution in containers
-- Job Queue (queue/queue.go): Handles concurrent execution of code submissions
-- Submission Model (model/submission.go): Defines the data structure for code submissions
+### Backend Components
+
+- **HTTP Handlers** (`handler/handler.go`): Processes API requests and WebSocket connections
+- **Execution Service** (`service/execution.go`): Manages code execution in containers
+- **Job Queue** (`queue/queue.go`): Handles concurrent execution of code submissions
+- **Submission Model** (`model/submission.go`): Defines the data structure for code submissions
+
+### Frontend Components
+
+- **Editor Area** (`EditorArea.jsx`): Main code editor with Monaco editor integration
+- **Terminal Panel** (`Panel.jsx`): Interactive terminal for code execution and input
+- **Sidebar** (`Sidebar.jsx`): File explorer and project structure navigation
+- **Status Bar** (`StatusBar.jsx`): Information display and quick actions
+
+### Communication Flow
+
+1. Frontend submits code to backend via REST API
+2. Backend assigns a unique ID and queues the execution
+3. Frontend connects to WebSocket endpoint with the execution ID
+4. Backend sends real-time execution output through WebSocket
+5. Frontend can send user input back through WebSocket
+6. Results are stored and retrievable via REST endpoints
 
 ## Requirements
-- Go 1.22.3 or higher
-- Docker
-- Network connectivity for container image pulling
\ No newline at end of file
+
+- **Backend**:
+  - Go 1.22.3 or higher
+  - Docker
+  - Network connectivity for container image pulling
+- **Frontend**:
+  - Node.js and npm/yarn
+  - Modern web browser
+
+## Installation
+
+### Backend Setup
+
+1. Clone the repository:
+   ```bash
+   git clone https://github.com/arnab-afk/monaco.git
+   cd monaco/backend
+
+2.Install Go dependencies:
+
+```bash
+    go mod download
+```
+
+3.Build the application:
+```bash
+go build -o monaco
+```
+
+4.Run the service
+```bash
+    ./monaco
+```
+
+The backend service will start on port 8080 by default.
+
+### Frontend Setup
+1. Navigate to the Frontend directory:
+```bash
+cd Frontend
+```
+
+2. Install dependencies:
+```bash
+npm install
+```
+
+3. Set up environment variables: Create a ```.env``` or ```.env.local.``` file with:
+```bash
+VITE_API_URL=http://localhost:8080
+```
+
+4. Start the development server:
+```bash
+npm run dev
+```
+
+The frontend will be available at http://localhost:5173 by default.
+
+### API Reference
+
+### REST Endpoints
+```POST /submit```
+
+Submits code for execution
+```json
+{
+  "language": "python",
+  "code": "print('Hello, World!')",
+  "input": ""
+}
+```
+
+Response:
+```json
+{
+  "id": "6423259c-ee14-c5aa-1c90-d5e989f92aa1"
+}
+```
+
+```GET /status?id={submissionId}```
+
+Checks the status of submission:
+```json
+{
+  "id": "6423259c-ee14-c5aa-1c90-d5e989f92aa1", 
+  "status": "completed",
+  "queuedAt": "2025-03-25T14:30:00Z",
+  "startedAt": "2025-03-25T14:30:01Z",
+  "completedAt": "2025-03-25T14:30:02Z",
+  "executionTime": 1000
+}
+```
+
+```GET /result?id={submissionId}```
+
+Gets the execution result of a submission.
+
+Response:
+```json
+{
+  "id": "6423259c-ee14-c5aa-1c90-d5e989f92aa1",
+  "status": "completed",
+  "language": "python",
+  "output": "Hello, World!",
+  "queuedAt": "2025-03-25T14:30:00Z",
+  "startedAt": "2025-03-25T14:30:01Z",
+  "completedAt": "2025-03-25T14:30:02Z",
+  "executionTime": 1000,
+  "executionTimeFormatted": "1.0s",
+  "totalTime": 2000,
+  "totalTimeFormatted": "2.0s"
+}
+```
+
+```GET /queue-stats```
+Gets the statistics about the job queue.
+
+Response:
+```json
+{
+  "queue_stats": {
+    "queue_length": 5,
+    "max_workers": 3,
+    "running_jobs": 3
+  },
+  "submissions": 42
+}
+```
+
+### WebSocket Endpoints
+```ws://localhost:8080/ws/terminal?id={submissionId}```
+
+Establishes a real-time connection for terminal interaction.
+
+- The server sends execution output as plain text messages.
+- The client can send input as plain text messages (with newline).
+- Connection automatically closes when execution completes or fails.
+
+### Terminal Input Handling
+The system supports interactive programs requiring user input:
+
+1. The frontend detects possible input prompts by looking for patterns
+2. When detected, it focuses the terminal and allows user input
+3. User input is captured in the terminal component's inputBuffer
+4. When the user presses Enter, the input is:
+    - Sent to the backend via WebSocket.
+    - Displayed in the terminal.
+    - Buffer is cleared for next input.
+5. The input is processed by the running program in real-time.
+
+
+Troubleshooting tips:
+
+- Ensure WebSocket connection is established before sending input
+- Check for WebSocket errors in console
+- Verify input reaches the backend by checking server logs
+- Ensure newline characters are properly appended to input.
+
+### Language Support
+### Python
+- **Version**: Python 3.9
+- **Input Handling**: Direct stdin piping
+- **Limitations**: No file I/O, no package imports outside standard library
+- **Resource Limits**: 100MB memory, 10% CPU
+### Java
+- **Version**: Java 11 (Eclipse Temurin)
+- **Class Detection**: Extracts class name from code using regex.
+- **Memory Settings**: 64MB min heap, 256MB max heap
+- **Resource Limits**: 400MB memory, 50% CPU
+C
+- **Version**: Latest GCC
+- **Compilation Flags**: Default GCC settings
+- **Resource Limits**: 100MB memory, 10% CPU
+
+### C++
+- **Version**: Latest G++
+- **Standard**: C++17
+- **Resource Limits**: 100MB memory, 10% CPU
+
+### Security Considerations
+All code execution happens within isolated Docker containers with:
+
+- No network access (```--network=none```)
+- Limited CPU and memory resources
+- Limited file system access
+- No persistent storage
+- Execution time limits (10-15 seconds)
+
+### Debugging
+Check backend logs for execution details
+Use browser developer tools to debug WebSocket connections
+Terminal panel shows WebSocket connection status and errors
+Check Docker logs for container-related issues.
+
+### Contributing
+Contributions are welcome! Please feel free to submit a Pull Request.
+