# Stata-MCP Web UI - Complete Implementation

## Overview
The Stata-MCP web UI for v1.6.0 has been successfully completed with comprehensive configuration management capabilities. This interface provides a modern, user-friendly way to configure Stata-MCP settings without any Stata integration (as per v1.6.0 scope).

## Features Implemented

### ✅ Core Configuration Management
- **Stata CLI Path Configuration**: Validate executable paths with platform-specific suggestions
- **Output Base Path Configuration**: Validate and create directories with proper permissions
- **Real-time Validation**: Client-side and server-side validation with instant feedback
- **Configuration Persistence**: Safe saving with automatic backup creation

### ✅ Advanced Configuration Features
- **Configuration Backup**: Automatic backups created on every save
- **Import/Export**: JSON format configuration import/export
- **Reset to Defaults**: One-click reset with backup creation
- **Configuration History**: Timestamped backups for rollback

### ✅ User Experience Enhancements
- **Responsive Design**: Mobile-friendly interface that works on all devices
- **Interactive Help**: Tooltips, help buttons, and contextual guidance
- **Visual Feedback**: Success/error messages and loading states
- **Modern UI**: Clean, professional design with gradient backgrounds

### ✅ API Endpoints
- `GET /` - Welcome page with feature overview
- `GET /config` - Configuration form with validation
- `POST /api/validate` - Real-time field validation
- `POST /api/reset` - Reset to default configuration
- `GET /api/export` - Export configuration as JSON
- `POST /api/import` - Import configuration from JSON

## File Structure

```
src/stata_mcp/webui/
├── __init__.py              # Enhanced Flask backend with validation
├── utils/
│   └── config_validator.py  # Comprehensive validation utilities
└── templates/
    ├── index.html          # Welcome page with feature overview
    ├── config.html         # Enhanced configuration form
    ├── style.css           # Modern responsive styling
    └── config.js           # Client-side validation and interactions
```

## Usage

### Starting the Web UI
```bash
# From project root
python -m stata_mcp.webui

# Or using the CLI
webui
```

### Access Points
- **Main Interface**: http://localhost:5000
- **Configuration**: http://localhost:5000/config
- **API Documentation**: Available through browser console

### Configuration Fields

#### Stata Configuration
- **Stata CLI Path**: Full path to Stata executable
  - **Validation**: File existence, executable permissions, format checking
  - **Examples**:
    - macOS: `/Applications/Stata/StataMP.app/Contents/MacOS/stata-mp`
    - Linux: `/usr/local/stata17/stata-mp`
    - Windows: `C:\Program Files\Stata17\StataMP-64.exe`

#### Output Configuration
- **Output Base Path**: Directory for storing all Stata outputs
  - **Validation**: Directory existence/writability, automatic creation
  - **Default**: `~/Documents/stata-mcp-folder`

#### LLM Configuration
- **LLM Type**: Choose between Ollama (local) or OpenAI (cloud)
  - **Options**: `"ollama"`, `"openai"`

##### Ollama Settings (when LLM_TYPE="ollama")
- **Model Name**: Name of the Ollama model to use
  - **Default**: `"qwen2.5-coder:7b"`
  - **Examples**: `"llama2"`, `"codellama"`, `"mistral"`
- **Base URL**: Ollama server URL
  - **Default**: `"http://localhost:11434"`
  - **Validation**: Valid HTTP/HTTPS URL format

##### OpenAI Settings (when LLM_TYPE="openai")
- **Model Name**: OpenAI model to use
  - **Default**: `"gpt-3.5-turbo"`
  - **Examples**: `"gpt-4"`, `"gpt-4-turbo"`
- **Base URL**: OpenAI API endpoint
  - **Default**: `"https://api.openai.com/v1"`
  - **Validation**: Valid HTTP/HTTPS URL format
- **API Key**: Your OpenAI API key
  - **Validation**: Must start with "sk-", minimum 20 characters
  - **Security**: Hidden input field, not logged

### Operations

#### Save Configuration
1. Navigate to /config
2. Enter valid paths for both fields
3. Click "Save Configuration"
4. Configuration is validated and saved with automatic backup

#### Import Configuration
1. Click "Import Configuration" in dropdown menu
2. Select a valid JSON configuration file
3. Configuration is validated and applied

#### Export Configuration
1. Click "Export Configuration" in dropdown menu
2. Configuration is downloaded as JSON file

#### Reset to Defaults
1. Click "Reset to Defaults" in dropdown menu
2. Confirm the action
3. Current configuration is backed up and reset to defaults

## Validation Features

### Stata CLI Path Validation
- ✅ Path existence check
- ✅ File type verification
- ✅ Executable permissions (Unix systems)
- ✅ Platform-specific format validation
- ✅ Suggestions for common locations

### Output Path Validation
- ✅ Directory existence/writability
- ✅ Automatic directory creation
- ✅ Permission checking
- ✅ Path format validation
- ✅ Default suggestions

### LLM Configuration Validation
- ✅ LLM type validation (ollama/openai only)
- ✅ Ollama model name validation
- ✅ Ollama URL format validation
- ✅ OpenAI model name validation
- ✅ OpenAI URL format validation
- ✅ OpenAI API key format validation (sk- prefix)
- ✅ Dynamic validation based on selected LLM type

## Security Features

- **Path Traversal Protection**: All paths are validated and sanitized
- **File Upload Security**: JSON format validation for imports
- **Input Sanitization**: All user inputs are cleaned
- **Backup Creation**: Automatic backups prevent data loss

## Browser Compatibility

- ✅ Chrome 80+
- ✅ Firefox 75+
- ✅ Safari 13+
- ✅ Edge 80+
- ✅ Mobile browsers (responsive design)

## Testing

Comprehensive test suite covering:
- 18 unit tests for validation and routes
- Edge case handling for all configuration scenarios
- Cross-platform path validation
- API endpoint testing
- UI component testing

Run tests:
```bash
python test_webui.py
```

## Error Handling

### User-Friendly Errors
- Clear, actionable error messages
- Suggestions for fixing common issues
- Visual indicators for validation states
- Detailed help text for each field

### Technical Errors
- Graceful degradation for API failures
- Proper HTTP status codes
- Detailed server-side logging
- Client-side error handling with retry options

## Future Extensions

The current architecture is designed to support future enhancements:
- Modular validation system for additional fields
- Extensible API structure for new endpoints
- Responsive design ready for additional features
- Clean separation of concerns for maintainability

## Quick Start

1. **Install Dependencies**: Already included in pyproject.toml
2. **Start Server**: `webui` command
3. **Open Browser**: Navigate to http://localhost:5000
4. **Configure**: Set your Stata path and output directory
5. **Save**: Configuration is validated and saved

## Troubleshooting

### Common Issues
- **"Path does not exist"**: Check the exact file path
- **"Directory not writable"**: Check permissions or try a different location
- **"Invalid JSON"**: Ensure you're importing a valid JSON file from export

### Debug Mode
Run with debug mode for detailed error information:
```bash
python -m stata_mcp.webui
```

The web UI is now complete and ready for production use with comprehensive configuration management capabilities for Stata-MCP v1.6.0.