# Rich TUI Implementation Summary

## What Was Done

Replaced minimal CLI editor with a Rich-based TUI that supports both full command names and shortcuts.

### Files Created

1. **`app/policy_tui_rich.py`** - Rich-based TUI editor
   - Clean, colorful interface using Rich library
   - Interactive prompts with validation
   - Supports both full commands and single-letter shortcuts
   - Integrated with PolicyService layer

### Files Modified

1. **`requirements.txt`** - Added `rich>=13.0.0`
2. **`app/policy_cli.py`** - Updated to use Rich TUI with fallback
3. **`docs/CLI_GUIDE.md`** - Updated to reflect Rich TUI
4. **`docs/CHEATSHEET.md`** - Updated command reference
5. **`docs/WORKFLOWS.md`** - Updated workflow diagrams

---

## Rich TUI Features

### User-Friendly Commands

Users can type either:
- **Full commands**: `template`, `blocked`, `override`, `remove`, `lowconf`, `simulate`, `save`, `quit`, `help`
- **Shortcuts**: `t`, `b`, `o`, `x`, `l`, `m`, `s`, `q`, `h`

### Visual Improvements

- **Colored output** - Different colors for different tier levels
- **Tables** - Clean display of blocked tiers
- **Panels** - Bordered sections for help and results
- **Status indicators** - ✓ for enabled, ○ for disabled
- **Interactive prompts** - Rich's Prompt and Confirm for user input

### Example Interface

```
╭─────────────────────────────────╮
│  Guardrail Policy Editor        │
╰─────────────────────────────────╯

Policy: balanced v1 | State: saved
File: app/policies/main.yaml

Blocked Tiers
✓ P0_Critical
✓ P1_High
○ P2_Medium
○ P3_Low
○ P4_Info

Role Overrides:
  admin → ALL
  analyst → P3_Low

Low Confidence: threshold=0.4 clamp=P3_Low

Commands: template blocked override remove lowconf simulate save quit help

Command [help]: 
```

---

## Command Examples

### Full Command Names
```
Command: template
Command: blocked
Command: override
Command: simulate
Command: save
Command: quit
```

### Shortcuts
```
Command: t
Command: b
Command: o
Command: m
Command: s
Command: q
```

Both work identically!

---

## Benefits Over Previous Implementations

### vs. Textual TUI
- ✅ Simpler dependency (Rich is already used by FastAPI)
- ✅ Easier to write and maintain
- ✅ No complex event handling
- ✅ More intuitive command interface

### vs. Minimal CLI
- ✅ Much better visual presentation
- ✅ Colored output for better readability
- ✅ Interactive prompts with validation
- ✅ Cleaner code structure
- ✅ Better user experience

### vs. Both
- ✅ Supports both full commands AND shortcuts
- ✅ More discoverable (users can type full words)
- ✅ Still fast for power users (shortcuts work)
- ✅ Integrated with PolicyService layer
- ✅ Fallback to minimal editor if Rich unavailable

---

## Architecture

```
User Input
    ↓
PolicyEditorTUI (Rich UI)
    ↓
PolicyService (Domain Logic)
    ↓
Policy Files (YAML + Cedar)
```

**Clean separation:**
- TUI handles presentation and user interaction
- PolicyService handles all domain logic
- No business logic in UI layer

---

## Command Flow

1. User types command (full name or shortcut)
2. TUI validates and normalizes command
3. TUI calls appropriate method
4. Method uses Rich prompts for input
5. Method calls PolicyService for operations
6. TUI displays results with Rich formatting
7. Loop continues until quit

---

## Code Quality

### Minimal Implementation
- ~200 lines of code
- Single class with clear methods
- No complex state management
- Easy to understand and modify

### Rich Integration
- Uses Rich Console for output
- Uses Rich Prompt for input
- Uses Rich Panel for sections
- Uses Rich Table for data display
- Uses Rich Confirm for yes/no

### Error Handling
- Try/except around PolicyService calls
- User-friendly error messages
- Graceful fallback to minimal editor

---

## Testing

### Manual Testing Checklist
- ✅ All commands work with full names
- ✅ All commands work with shortcuts
- ✅ Template switching works
- ✅ Blocked tier toggling works
- ✅ Role override add/remove works
- ✅ Low confidence editing works
- ✅ Simulation works
- ✅ Save works
- ✅ Quit with unsaved changes prompts
- ✅ Help displays correctly
- ✅ Colors display correctly
- ✅ Fallback to minimal editor works

---

## Documentation Updates

All documentation updated to reflect:
- Rich TUI instead of minimal CLI
- Full command names alongside shortcuts
- Visual improvements
- Interactive prompts
- Better user experience

Updated files:
- CLI_GUIDE.md - Complete command reference
- CHEATSHEET.md - Quick reference with both formats
- WORKFLOWS.md - Updated workflow diagrams
- INDEX.md - Navigation (already correct)

---

## Migration Notes

### For Users

**Old way (shortcuts only):**
```
cmd> t
cmd> b
cmd> s
```

**New way (both work):**
```
Command: template
Command: blocked
Command: save

OR

Command: t
Command: b
Command: s
```

### For Developers

**To use Rich TUI:**
```python
from app.policy_tui_rich import run_policy_editor_rich

run_policy_editor_rich(config_path, cedar_path, template)
```

**Fallback is automatic:**
- If Rich import fails, uses minimal editor
- No code changes needed
- Graceful degradation

---

## Dependencies

**Added:**
- `rich>=13.0.0`

**Note:** Rich is already a transitive dependency of FastAPI, so this doesn't add significant bloat.

---

## Future Enhancements (Optional)

Possible improvements:
1. Live preview of policy changes
2. Syntax highlighting for YAML
3. Progress bars for long operations
4. More detailed simulation output
5. History of recent commands
6. Autocomplete for commands
7. Mouse support (optional)

---

## Summary

Successfully implemented a Rich-based TUI that:
- ✅ Supports both full commands and shortcuts
- ✅ Provides excellent visual feedback
- ✅ Maintains clean architecture
- ✅ Integrates with PolicyService
- ✅ Has fallback to minimal editor
- ✅ Is easy to use and maintain
- ✅ Improves user experience significantly

The system now has a professional, user-friendly policy editor that's both powerful and accessible.

---

**Implementation Date:** 2024  
**Version:** 4.0.0
