# Dynamic OpenRouter Model Selection - Implementation Status

## ✅ Completed Features

### 1. OpenRouter API Integration
- **File**: `/lib/openrouter.ts`
- **Features**: 
  - OpenRouter API client with authentication
  - Model fetching from `/api/v1/models`
  - TypeScript interfaces for OpenRouter models
  - Rate limiting and error handling

### 2. API Route for Model Fetching
- **File**: `/app/api/openrouter/models/route.ts`
- **Features**:
  - Proxy endpoint for OpenRouter models API
  - API key validation
  - Error handling and response formatting

### 3. React Hook for Model Management
- **File**: `/hooks/useOpenRouterModels.ts`
- **Features**:
  - Model fetching with caching
  - Search and filtering capabilities
  - Category-based filtering
  - Loading states and error handling

### 4. Model Selector Component
- **File**: `/components/openrouter-model-selector/index.tsx`
- **Features**:
  - Modal-based model selection UI
  - Real-time search and filtering
  - Model information display (pricing, context length)
  - Category filtering
  - Loading states and error handling
  - Responsive design

### 5. Settings UI Integration
- **File**: `/components/editor/ask-ai/settings.tsx`
- **Features**:
  - Toggle between static and dynamic OpenRouter models
  - API key input with validation
  - Integration with model selector component
  - Local storage for API key and selected model

### 6. API Logic Updates
- **File**: `/app/api/ask-ai/route.ts`
- **Features**:
  - Support for custom OpenRouter models
  - Dynamic model validation
  - Provider selection for both static and dynamic models
  - Error handling for missing API keys

### 7. Provider System Cleanup
- **File**: `/lib/providers.ts`
- **Changes**:
  - Removed all static OpenRouter model definitions
  - Kept HuggingFace auto-provider intact
  - Maintained backward compatibility

## 🧪 Testing Checklist

### Local Development Setup
1. ✅ Dependencies installed (`npm install`)
2. ⏳ Development server started (`npm run dev`)
3. ⏳ Application accessible at `http://localhost:3000`

### Core Functionality Tests
1. **API Key Management**
   - [ ] Enter OpenRouter API key in settings
   - [ ] Validate API key format (sk-or-v1-*)
   - [ ] API key persisted in local storage
   - [ ] Error handling for invalid keys

2. **Model Selection**
   - [ ] Toggle "Use Custom OpenRouter Models" option
   - [ ] Open model selector dialog
   - [ ] Search models by name
   - [ ] Filter models by category
   - [ ] Select a model and confirm selection
   - [ ] Selected model persisted in local storage

3. **Model Information Display**
   - [ ] Model pricing information shown
   - [ ] Context length displayed
   - [ ] Model description visible
   - [ ] Category labels correct

4. **Chat Functionality**
   - [ ] Send a message with custom OpenRouter model
   - [ ] Verify API call uses OpenRouter endpoint
   - [ ] Streaming response works correctly
   - [ ] Error handling for API failures

5. **UI/UX**
   - [ ] Loading states display properly
   - [ ] Error messages are user-friendly
   - [ ] Modal opens/closes smoothly
   - [ ] Search is responsive
   - [ ] Mobile responsiveness

## 🔧 Environment Requirements

### Required Environment Variables
- No environment variables required (API keys stored locally)

### API Key Format
- OpenRouter API key format: `sk-or-v1-*`
- Minimum length: 20 characters

## 📝 Usage Instructions

### For Users
1. Open the application settings panel
2. Toggle "Use Custom OpenRouter Models" to enable dynamic selection
3. Enter your OpenRouter API key (format: sk-or-v1-...)
4. Click "Select Model" to open the model browser
5. Search/filter models as needed
6. Select your preferred model
7. Start chatting with your chosen model

### For Developers
1. Clone the repository
2. Run `npm install` to install dependencies
3. Start development server with `npm run dev`
4. Navigate to `http://localhost:3000`
5. Test the model selection flow

## 🔍 Key Files to Review

- `/lib/openrouter.ts` - Core OpenRouter integration
- `/hooks/useOpenRouterModels.ts` - Model management hook
- `/components/openrouter-model-selector/index.tsx` - Model selector UI
- `/components/editor/ask-ai/settings.tsx` - Settings integration
- `/app/api/ask-ai/route.ts` - Chat API with dynamic model support
- `/app/api/openrouter/models/route.ts` - Model fetching API

## ✨ Next Steps

1. Start the development server and test the complete flow
2. Verify all UI components render correctly
3. Test API integration with a valid OpenRouter API key
4. Confirm chat functionality works with selected models
5. Test error handling scenarios
6. Verify mobile responsiveness
7. Consider adding model favoriting/bookmarking feature
8. Add model performance metrics if available via API

## 🏗️ Architecture Notes

- **Static Models**: HuggingFace models remain statically defined
- **Dynamic Models**: OpenRouter models fetched from API
- **Storage**: API keys and preferences stored in localStorage
- **Validation**: Client-side and server-side API key validation
- **Error Handling**: Graceful degradation with user-friendly messages
- **Performance**: Model list cached to reduce API calls