# LeetAgent CLI - Professional Configuration System

## ✅ What We Built

A **production-ready, user-friendly CLI configuration system** for LeetAgent that:

### 1. **Interactive Configuration Wizard** 🎯
- Professional onboarding experience
- Step-by-step guided setup
- Smart defaults and validation
- Support for optional Telegram notifications
- Confirmation prompts for updating existing values

**Commands:**
- `leetagent config` - Interactive wizard
- `leetagent setup` - Alias for first-time users

### 2. **Credential Management** 🔐
- **Three storage methods:**
  - `config.json` - Simple file-based (recommended for most users)
  - OS Keyring - Maximum security (Windows Credential Manager, macOS Keychain, Linux Secret Service)
  - Environment variables - For CI/CD and advanced users

- **Priority resolution:**
  1. OS Keyring (highest priority)
  2. `~/.leetagent/config.json`
  3. Environment variables (fallback)

**Commands:**
- `leetagent config-set KEY VALUE` - Quick set
- `leetagent secret-set KEY` - Secure keyring storage with hidden input
- `leetagent config-show` - View all settings (with masking)

### 3. **Supported Configuration** ⚙️

#### Required Settings:
- **GEMINI_API_KEY** - Google Gemini API for AI code generation
- **PREFERRED_LANGUAGE** - Default coding language for solutions

#### Optional Settings:
- **TELEGRAM_TOKEN** - Bot token for notifications
- **CHAT_ID** - Telegram chat ID

#### Supported Languages:
Python, Java, C++, C, C#, JavaScript, TypeScript, Go, Rust, Swift, Kotlin, Ruby, PHP, Scala

### 4. **User Experience Features** ✨

#### Smart Validation:
- Language validation with suggestions
- API key format checking
- Clear error messages with actionable guidance

#### Visual Feedback:
- Rich terminal UI with colors and emojis
- Tables for status display
- Masked sensitive values (first4***last4)
- Progress indicators
- Status icons (✅ ⚠ ❌)

#### Security Features:
- Value masking in all outputs
- Hidden input for secrets
- Confirmation prompts
- No sensitive data in command history

### 5. **Status & Diagnostics** 🔍

**`leetagent session-status`** shows:
- All configured credentials with masking
- Source of each value (config.json, keyring, env)
- Status indicators (configured/missing)
- Cookie authentication status
- Optional online API checks with `--check-online`

### 6. **Zero File Editing Required** 📝
- **No .env files needed** - Everything via CLI
- **No manual JSON editing** - Interactive wizard handles it
- **Works out of the box** - Just `pip install leetagent` and run `leetagent config`

---

## 📁 File Structure

```
~/.leetagent/
├── config.json         # User configuration (API keys, preferences)
├── cookies.json        # LeetCode session cookies
├── solutions/          # Generated code solutions
├── logs/               # Application logs
└── history.json        # Submission history

LeetcodeAgentAutomation/
├── cli/
│   └── main_cli.py     # Enhanced CLI with wizard & commands
├── config.py           # Settings with config.json integration
├── USER_GUIDE.md       # Comprehensive end-user documentation
└── CREDENTIAL_MANAGEMENT.md  # Technical documentation
```

---

## 🎯 User Journey

### First-Time User:
```bash
# 1. Install
pip install leetagent

# 2. Run wizard (first command they run)
leetagent config
# → Guides through Gemini API key, language, optional Telegram

# 3. Authenticate
leetagent login
# → Opens browser, auto-saves cookies

# 4. Solve problems!
leetagent auto
leetagent direct https://leetcode.com/problems/two-sum/
```

### Power User:
```bash
# Quick configuration updates
leetagent config-set PREFERRED_LANGUAGE Java
leetagent config-set GEMINI_API_KEY new_key

# Secure storage
leetagent secret-set GEMINI_API_KEY  # Uses OS keyring

# Status check
leetagent session-status --check-online
```

---

## 🔧 Technical Implementation

### Key Components:

1. **config.py** - Centralized settings with config.json integration
   - `_load_user_config()` - Loads from `~/.leetagent/config.json`
   - Priority: user config → environment → defaults
   - `reload_config()` - Hot reload after changes

2. **cli/main_cli.py** - CLI commands
   - `config_command()` - Interactive wizard
   - `config_set()` - Quick value setting
   - `config_show()` - Display configuration
   - `secret_set()` - Keyring storage
   - `session_status()` - Comprehensive status check

3. **Helper Functions:**
   - `_load_config()` / `_save_config()` - JSON file management
   - `_mask()` - Sensitive value masking
   - `_resolve_credential()` - Multi-source resolution
   - `_credential_status_table()` - Rich table display

### Security Features:
- Masked output (test***2345)
- Hidden password input
- Keyring integration (optional)
- No .env in Git (documented)
- Secure file permissions

---

## 📊 Comparison: Before vs After

### Before:
❌ User must create `.env` file manually  
❌ Need to edit JSON files directly  
❌ No guidance on what values to set  
❌ No validation or error checking  
❌ Confusing error messages  
❌ No status visibility  

### After:
✅ Interactive wizard guides setup  
✅ No file editing required  
✅ Clear prompts for each setting  
✅ Smart validation with helpful errors  
✅ Clear "Run `leetagent config`" messages  
✅ Full status display with `config-show` and `session-status`  
✅ Three storage options (file, keyring, env)  
✅ Professional UX with Rich terminal UI  

---

## 🚀 End User Benefits

1. **Zero Learning Curve**
   - Just run `leetagent config` and follow prompts
   - No need to read documentation first

2. **Professional Experience**
   - Beautiful terminal UI
   - Clear guidance at every step
   - Helpful error messages

3. **Flexible & Secure**
   - Choose storage method (file vs keyring)
   - Optional settings (Telegram)
   - Easy to update any value

4. **Transparent**
   - See exactly what's configured
   - Know where values come from
   - Verify API connectivity

5. **Works Like Modern CLIs**
   - Similar to `gh auth login`, `docker login`, `aws configure`
   - Follows CLI best practices
   - Intuitive command structure

---

## 📚 Documentation

- **USER_GUIDE.md** - Comprehensive end-user guide
  - Quick start
  - All commands explained
  - Getting API keys
  - Troubleshooting
  - Security best practices

- **CREDENTIAL_MANAGEMENT.md** - Technical documentation
  - Architecture decisions
  - Priority resolution
  - Storage mechanisms
  - Development guide

---

## ✨ Ready for Distribution

This system is **production-ready** and suitable for:
- ✅ PyPI distribution (`pip install leetagent`)
- ✅ Public GitHub repository
- ✅ Non-technical end users
- ✅ Enterprise environments
- ✅ CI/CD pipelines

All credential management happens through **clean, professional CLI commands** with **zero manual file editing** required! 🎉
