# Quick Start Guide - Modular App

## 🚀 Getting Started

### 1. Run the New Modular App
```bash
cd /srv/prezenta_work
python3 app_modular.py
```

### 2. Expected Output
```
======================================================================
PREZENTA WORK - Attendance Tracking System v2.7 (Modular)
======================================================================

[1/5] Checking dependencies...
[2/5] Verifying dependencies...
[3/5] Performing system initialization...
[4/5] Retrieving device information...
Final result - Hostname: rpi-prezenta-1, Device IP: 192.168.1.50
[5/5] Setting up logging...

======================================================================
Initialization complete!
======================================================================

Registering API routes...
✓ API routes registered

======================================================================
Starting Flask server...
======================================================================

 * Serving Flask app 'Flask'
 * Running on http://0.0.0.0:80
```

### 3. Test the API
```bash
# In another terminal

# Get device status
curl http://localhost/status

# Execute a command
curl -X POST http://localhost/execute_command \
  -H "Content-Type: application/json" \
  -d '{"command": "uptime"}'

# Check for updates
curl -X POST http://localhost/auto_update
```

---

## 🔧 Configuration

### Method 1: Environment Variables
```bash
export MONITORING_SERVER_HOST=192.168.1.100
export FLASK_PORT=8080
python3 app_modular.py
```

### Method 2: .env File
Create `.env` in `/srv/prezenta_work/`:
```env
MONITORING_SERVER_HOST=192.168.1.100
AUTO_UPDATE_SERVER_PASSWORD=your_password
FLASK_PORT=80
```

Then run:
```bash
python3 app_modular.py
```

### Method 3: Edit config_settings.py
Directly modify `/srv/prezenta_work/config_settings.py`

---

## 📁 Important Files

| File | Purpose |
|------|---------|
| `config_settings.py` | **All configuration settings** |
| `./data/idmasa.txt` | Table/room name (used in all logs) |
| `./data/device_info.txt` | Cached device hostname & IP |
| `./data/log.txt` | Application logs |
| `.env` | Environment-specific secrets |

---

## 🌐 API Endpoints

### GET /status
Returns device status information.

**Response:**
```json
{
  "hostname": "rpi-prezenta-1",
  "device_ip": "192.168.1.50",
  "nume_masa": "TABLE_05",
  "timestamp": "2025-12-18 14:30:45",
  "uptime": " 14:30:45 up 45 days, 23:15, 1 user",
  "disk_usage": "Filesystem...",
  "memory_usage": "Mem: 3888 2156 1732"
}
```

---

### POST /execute_command
Execute allowed system commands.

**Request:**
```json
{
  "command": "uptime"
}
```

**Response:**
```json
{
  "status": "success",
  "message": "Command executed successfully",
  "output": " 14:30:45 up 45 days, 23:15, 1 user, load average: 0.12, 0.15, 0.10"
}
```

**Allowed Commands:**
- `sudo apt update`
- `sudo apt upgrade -y`
- `sudo apt autoremove -y`
- `sudo apt autoclean`
- `sudo reboot`
- `sudo shutdown -h now`
- `df -h`
- `free -m`
- `uptime`
- `systemctl status`
- `sudo systemctl restart networking`
- `sudo systemctl restart ssh`

---

### POST /auto_update
Trigger automatic application update.

**Response (No Update):**
```json
{
  "status": "no_update_needed",
  "current_version": 2.7,
  "remote_version": 2.7,
  "message": "Application is already up to date"
}
```

**Response (Update Available):**
```json
{
  "status": "success",
  "message": "Updated from version 2.7 to 2.8. Device restarting...",
  "old_version": 2.7,
  "new_version": 2.8,
  "restart_scheduled": true
}
```

---

## 📊 Logging

### Local Logs
- **Location:** `./data/log.txt`
- **Format:** `YYYY-MM-DD HH:MM:SS - LEVEL - message`
- **Retention:** 10 days (auto-rotated)

### Remote Logs
- **Endpoint:** `http://rpi-ansible:80/logs`
- **Format:** JSON with hostname, IP, table name, and message
- **Sent automatically** when events occur

---

## 🔍 Troubleshooting

### Port 80 Permission Denied
```bash
# Solution: Run with sudo or set port capability
sudo setcap cap_net_bind_service=ep $(which python3)
python3 app_modular.py
```

### Cannot Connect to Monitoring Server
```bash
# Check configuration
cat config_settings.py | grep MONITORING

# Test connectivity
ping rpi-ansible
```

### RFID Reader Not Detected
```bash
# Check if user is in dialout group
sudo usermod -a -G dialout $USER
sudo reboot

# Verify device exists
ls -l /dev/ttyS0 /dev/ttyAMA0 /dev/ttyUSB0
```

### Logs Not Sending to Server
```bash
# Check network connectivity
ping 8.8.8.8

# Check log file
tail -f ./data/log.txt

# Verify server is running on expected port
curl http://rpi-ansible:80/logs
```

---

## 📝 Configuration Examples

### Example 1: Custom Server Address
```bash
export MONITORING_SERVER_HOST=192.168.1.100
export FLASK_PORT=8080
python3 app_modular.py
```

### Example 2: Different Update Server
```bash
export AUTO_UPDATE_SERVER_HOST=update-server.local
export AUTO_UPDATE_SERVER_USER=admin
export AUTO_UPDATE_SERVER_PASSWORD=secure_pass
python3 app_modular.py
```

### Example 3: Using .env File
```bash
cat > .env << EOF
MONITORING_SERVER_HOST=192.168.1.100
AUTO_UPDATE_SERVER_PASSWORD=Initial01!
CONNECTIVITY_CHECK_HOST=10.76.140.17
FLASK_PORT=80
EOF

python3 app_modular.py
```

---

## 🔄 Module Dependencies

When running `app_modular.py`, the startup sequence is:

1. **config_settings.py** - Load configuration
2. **dependencies_module.py** - Check/install packages
3. **system_init_module.py** - Initialize system
4. **device_module.py** - Get device info
5. **logger_module.py** - Setup logging
6. **connectivity_module.py** - Start background monitor
7. **rfid_module.py** - Initialize RFID reader
8. **api_routes_module.py** - Register Flask routes
9. **Flask** - Start HTTP server

Each step must complete (with possible warnings) before proceeding.

---

## ✅ Verification Checklist

- [ ] App starts without errors
- [ ] Can reach `/status` endpoint
- [ ] Can execute `/execute_command` endpoint
- [ ] Logs appear in `./data/log.txt`
- [ ] Logs send to monitoring server
- [ ] Configuration changes via environment variables work
- [ ] RFID reader initializes (or graceful failure)
- [ ] Connectivity monitor runs in background

---

## 📞 Support

| Issue | Check |
|-------|-------|
| Port conflict | `lsof -i :80` |
| Permission denied | `whoami`, check `sudoers` |
| Missing packages | `pip list | grep rdm6300` |
| Network issues | `ping 8.8.8.8` |
| Server not responding | `curl http://server:port/logs` |

---

## 🔗 Related Documentation

- **[MODULAR_ARCHITECTURE.md](MODULAR_ARCHITECTURE.md)** - Detailed architecture guide
- **[REFACTORING_COMPLETE.md](REFACTORING_COMPLETE.md)** - Refactoring summary
- **[../PREZENTA_WORK_ANALYSIS.md](../PREZENTA_WORK_ANALYSIS.md)** - Client analysis
- **config_settings.py** - All configuration options

---

**Ready to go!** 🚀

Run: `python3 app_modular.py`