# AeThex Engine - AI Assistant Module Architecture

## Vision
An AI-powered coding assistant built directly into the AeThex Engine editor, providing
realtime code completion, bug detection, documentation generation, and intelligent suggestions.

---

## Core Features

### 1. Smart Code Completion
- Context-aware GDScript suggestions
- Function parameter hints with AI explanations
- Auto-completion that understands your project
- Natural language to code generation

### 2. Intelligent Error Detection
- Real-time bug detection
- AI-powered fix suggestions
- Performance optimization hints
- Security vulnerability scanning

### 3. Documentation AI
- Auto-generate function documentation
- Explain complex code blocks
- Generate tutorials from your code
- API reference creator

### 4. Asset Intelligence
- Texture optimization suggestions
- Mesh LOD recommendations
- Shader performance analysis
- Asset naming conventions

### 5. Natural Language Commands
- "Create a player controller"
- "Add jump physics to this character"
- "Generate a main menu UI"
- "Debug why my player isn't moving"

---

## Technical Architecture

### Module Structure
```
engine/modules/aethex_ai/
├── SCsub                          # Build configuration
├── config.py                      # Module setup
├── register_types.h/cpp           # Godot module registration
├── ai_assistant.h/cpp             # Main AI assistant class
├── ai_code_completion.h/cpp       # Code completion engine
├── ai_error_analyzer.h/cpp        # Error detection & fixes
├── ai_doc_generator.h/cpp         # Documentation generation
├── ai_asset_optimizer.h/cpp       # Asset optimization
├── api/
│   ├── ai_api_client.h/cpp        # API communication
│   ├── claude_client.h/cpp        # Claude API integration
│   ├── rate_limiter.h/cpp         # API rate limiting
│   └── cache_manager.h/cpp        # Response caching
├── ui/
│   ├── ai_panel.h/cpp             # Main AI panel UI
│   ├── ai_chat_widget.h/cpp       # Chat interface
│   └── ai_suggestions_panel.h/cpp # Suggestions display
└── tests/
    └── test_ai_assistant.h        # Unit tests
```

### Core Classes

#### 1. AIAssistant (Singleton)
```cpp
class AIAssistant : public Object {
    GDCLASS(AIAssistant, Object);
    
private:
    static AIAssistant *singleton;
    AIAPIClient *api_client;
    CacheManager *cache;
    RateLimiter *rate_limiter;
    
public:
    // Code assistance
    String get_code_completion(const String &context, const Vector<String> &recent_code);
    String explain_code(const String &code_block);
    String fix_error(const String &error_message, const String &code_context);
    
    // Documentation
    String generate_function_docs(const String &function_signature);
    String generate_class_docs(const String &class_code);
    
    // Natural language
    String natural_language_to_code(const String &description, const String &context);
    
    // Asset optimization
    Dictionary analyze_asset(const String &asset_path);
    String suggest_optimization(const String &asset_path);
    
    static AIAssistant *get_singleton();
};
```

#### 2. AIAPIClient
```cpp
class AIAPIClient : public RefCounted {
    GDCLASS(AIAPIClient, RefCounted);
    
private:
    String api_key;
    String api_endpoint;
    HTTPClient *http_client;
    
    struct PendingRequest {
        Callable callback;
        String request_id;
        uint64_t timestamp;
    };
    
    HashMap<String, PendingRequest> pending_requests;
    
public:
    // Async API calls
    String send_completion_request(const String &prompt, const Callable &callback);
    String send_chat_request(const Vector<String> &messages, const Callable &callback);
    
    // Sync API calls (with timeout)
    String send_completion_sync(const String &prompt, float timeout = 10.0);
    
    // Configuration
    void set_api_key(const String &p_key);
    void set_endpoint(const String &p_endpoint);
    
    Error initialize();
};
```

#### 3. AICodeCompletion (Editor Plugin)
```cpp
class AICodeCompletion : public EditorPlugin {
    GDCLASS(AICodeCompletion, EditorPlugin);
    
private:
    CodeEdit *current_editor;
    PopupMenu *suggestion_popup;
    Timer *completion_timer;
    String current_context;
    
    void _on_text_changed();
    void _on_completion_timer_timeout();
    void _show_ai_suggestions(const Vector<String> &suggestions);
    
public:
    virtual String get_name() const override { return "AICodeCompletion"; }
    virtual void edit(Object *p_object) override;
    virtual bool handles(Object *p_object) const override;
};
```

#### 4. AIPanel (Editor Dock)
```cpp
class AIPanel : public VBoxContainer {
    GDCLASS(AIPanel, VBoxContainer);
    
private:
    TabContainer *tab_container;
    
    // Tabs
    Control *chat_tab;
    Control *suggestions_tab;
    Control *docs_tab;
    
    // Chat interface
    RichTextLabel *chat_history;
    LineEdit *chat_input;
    Button *send_button;
    
    // Suggestions
    Tree *suggestions_tree;
    Button *apply_suggestion_button;
    
    void _on_send_chat();
    void _on_apply_suggestion();
    void _update_suggestions();
    
public:
    void add_chat_message(const String &message, bool is_user);
    void show_suggestion(const String &title, const String &description, const String &code);
};
```

---

## API Integration

### Claude API (Anthropic)
**Endpoint:** `https://api.anthropic.com/v1/messages`

**Request Format:**
```json
{
    "model": "claude-3-5-sonnet-20241022",
    "max_tokens": 1024,
    "messages": [
        {
            "role": "user",
            "content": "Generate a GDScript player controller with WASD movement"
        }
    ],
    "system": "You are an expert game developer assistant for the AeThex Engine..."
}
```

### Rate Limiting
- Free tier: 10 requests/minute
- Pro tier: 100 requests/minute
- Cache responses for 1 hour
- Queue requests when rate limited

### Error Handling
```cpp
enum APIErrorCode {
    API_ERROR_NONE,
    API_ERROR_NETWORK,
    API_ERROR_AUTH,
    API_ERROR_RATE_LIMIT,
    API_ERROR_TIMEOUT,
    API_ERROR_INVALID_RESPONSE
};
```

---

## User Interface

### 1. AI Panel (Dock)
- Bottom dock by default
- Resizable, collapsible
- Three tabs: Chat, Suggestions, Docs

### 2. Inline Suggestions
- Ghost text in code editor
- Accept with Tab, reject with Esc
- Multiple suggestions with Alt+N

### 3. Context Menu Integration
- Right-click → "Ask AI about this"
- Right-click → "Generate docs"
- Right-click → "Fix this error"

### 4. Command Palette
- Ctrl+Shift+A → AI Command Palette
- Type natural language commands
- See AI-powered results instantly

---

## Configuration & Settings

### Editor Settings
```cpp
// In editor_settings.cpp
EDITOR_SETTING(Variant::STRING, PROPERTY_HINT_NONE, 
    "ai/api_key", "", "")
EDITOR_SETTING(Variant::BOOL, PROPERTY_HINT_NONE, 
    "ai/enable_code_completion", true, "")
EDITOR_SETTING(Variant::BOOL, PROPERTY_HINT_NONE, 
    "ai/enable_error_detection", true, "")
EDITOR_SETTING(Variant::INT, PROPERTY_HINT_RANGE, 
    "ai/suggestion_delay_ms", 500, "100,2000,10")
EDITOR_SETTING(Variant::BOOL, PROPERTY_HINT_NONE, 
    "ai/cache_responses", true, "")
```

### User Preferences
- API key (encrypted storage)
- Enable/disable features
- Suggestion delay
- Privacy settings (opt-in telemetry)

---

## Privacy & Security

### Data Handling
- **Never** send full project code
- Only send relevant context (20 lines max)
- Strip sensitive data (passwords, keys)
- User explicitly opts-in

### API Key Storage
```cpp
// Encrypted storage using EditorSettings
String encrypted_key = EditorSettings::get_singleton()
    ->get_setting("ai/api_key_encrypted");
String api_key = Crypto::decrypt_aes256(encrypted_key, machine_id);
```

### Usage Tracking (Opt-in Only)
- Number of requests
- Popular features
- Error rates
- Anonymous metrics only

---

## Implementation Phases

### Phase 1: Foundation (Week 1-2)
- [ ] Module structure & registration
- [ ] API client implementation
- [ ] Basic UI panel
- [ ] Settings integration
- [ ] Simple code completion

### Phase 2: Core Features (Week 3-4)
- [ ] Enhanced code completion
- [ ] Error detection & fixes
- [ ] Documentation generation
- [ ] Chat interface

### Phase 3: Advanced Features (Week 5-8)
- [ ] Natural language commands
- [ ] Asset optimization
- [ ] Performance analysis
- [ ] Multi-file context

### Phase 4: Polish & Optimization (Week 9-12)
- [ ] Response caching
- [ ] Rate limiting
- [ ] Error handling
- [ ] User testing & feedback

---

## Testing Strategy

### Unit Tests
```cpp
// test_ai_assistant.h
TEST_CASE("[AIAssistant] Code completion") {
    AIAssistant *ai = AIAssistant::get_singleton();
    String result = ai->get_code_completion(
        "func _ready():\n\t",
        Vector<String>()
    );
    CHECK(result.contains("extends"));
}
```

### Integration Tests
- Test with real API (sandboxed)
- Mock API for CI/CD
- Rate limiting behavior
- Error recovery

### User Acceptance Testing
- Beta testers from community
- Collect feedback
- Iterate quickly

---

## Metrics & Success Criteria

### Technical Metrics
- Response time < 2 seconds
- Cache hit rate > 60%
- Error rate < 1%
- API cost < $0.01/user/day

### User Metrics
- Daily active users
- Feature usage rates
- User satisfaction (surveys)
- Productivity improvement

---

## Future Enhancements

### Advanced AI Features
- Multi-language support (C#, C++)
- Voice commands
- Visual scripting AI
- Game design suggestions

### Model Improvements
- Fine-tuned models on game dev code
- Local AI models (privacy-first)
- Specialized models for different tasks

### Ecosystem Integration
- AI-generated assets
- Procedural content generation
- Game balancing suggestions
- Playtesting AI

---

## Getting Started (Developer)

### 1. Get API Key
```bash
# Sign up at https://console.anthropic.com
# Create API key
# Add to AeThex settings
```

### 2. Enable Module
```bash
# Build with AI module
scons modules=aethex_ai
```

### 3. Test in Editor
```
Editor → Settings → AI Assistant
Enter API key
Enable code completion
Test with simple script
```

---

**Next Steps:** Implement Phase 1 foundation (API client + basic UI)