# OpenVPN Monitor UI & API

A modern, reactive dashboard for monitoring OpenVPN server status, traffic history, and certificate validity. Built with Vue.js 3 and Python (Flask).

## 🚀 Quick Start

### Prerequisites
*   **Backend**: Python 3.9+ (`pip`, `venv`)
*   **Frontend**: Node.js 18+ (for building only), any Web Server (Nginx/Apache) for production.

### 1. Backend Setup
Run the API and Data Gatherer.

```bash
# Ubuntu/Debian
sudo apt update && sudo apt install python3-venv python3-pip

# Alpine
apk add python3 py3-pip

# Setup
cd /path/to/app/APP
python3 -m venv venv
source venv/bin/activate
pip install -r requirements.txt

# Run (Manual testing)
python3 openvpn_api_v3.py &
python3 openvpn_gatherer_v3.py &
```

### 2. Frontend Setup
Build the SPA and deploy to your web server.

```bash
cd /path/to/app/UI/client
npm install
npm run build

# Deploy (Example)
sudo cp -r dist/* /var/www/html/
```

---

## 🛠 Service Configuration

### Debian / Ubuntu (Systemd)
Create service files in `/etc/systemd/system/`.

**1. API Service (`/etc/systemd/system/ovpmon-api.service`)**
```ini
[Unit]
Description=OpenVPN Monitor API
After=network.target

[Service]
User=root
WorkingDirectory=/opt/ovpmon/APP
ExecStart=/opt/ovpmon/APP/venv/bin/python3 openvpn_api_v3.py
Restart=always

[Install]
WantedBy=multi-user.target
```

**2. Gatherer Service (`/etc/systemd/system/ovpmon-gatherer.service`)**
```ini
[Unit]
Description=OpenVPN Monitor Data Gatherer
After=network.target

[Service]
User=root
WorkingDirectory=/opt/ovpmon/APP
ExecStart=/opt/ovpmon/APP/venv/bin/python3 openvpn_gatherer_v3.py
Restart=always

[Install]
WantedBy=multi-user.target
```

**Enable & Start:**
```bash
sudo systemctl daemon-reload
sudo systemctl enable --now ovpmon-api ovpmon-gatherer
```

### Alpine Linux (OpenRC)
For Alpine, create scripts in `/etc/init.d/` (e.g., `ovpmon-api`) using `openrc-run`.
```bash
#!/sbin/openrc-run
description="OpenVPN Monitor API"
command="/opt/ovpmon/APP/venv/bin/python3"
command_args="/opt/ovpmon/APP/openvpn_api_v3.py"
directory="/opt/ovpmon/APP"
command_background=true
pidfile="/run/ovpmon-api.pid"
```
Make executable (`chmod +x`) and start: `rc-service ovpmon-api start`.

---

## 🌐 Web Server Configuration

**Recommendation: Nginx** is preferred for its performance and simple SPA configuration (`try_files`).

### Nginx Config
```nginx
server {
    listen 80;
    server_name vpn-monitor.local;
    root /var/www/html;
    index index.html;

    # SPA Fallback
    location / {
        try_files $uri $uri/ /index.html;
    }

    # Proxy API requests (Optional, if not exposing 5001 directly)
    location /api/ {
        proxy_pass http://127.0.0.1:5001;
    }
}
```

### Apache Config

**Setup (Alpine Linux):**
```bash
apk add apache2 apache2-proxy
rc-service apache2 restart
```

**Setup (Debian/Ubuntu):**
```bash
sudo a2enmod rewrite proxy proxy_http
sudo systemctl restart apache2
```

Ensure `mod_rewrite`, `mod_proxy`, and `mod_proxy_http` are enabled.

**VirtualHost Config:**
```apache
<VirtualHost *:80>
    DocumentRoot "/var/www/html"
    <Directory "/var/www/html">
        Options Indexes FollowSymLinks
        AllowOverride All  # CRITICAL for .htaccess
        Require all granted
    </Directory>

    # Proxy API requests (Optional, if not exposing 5001 directly)
    <Location "/api/">
        ProxyPreserveHost On
        ProxyPass "http://127.0.0.1:5001/api/"
        ProxyPassReverse "http://127.0.0.1:5001/api/"
    </Location>
</VirtualHost>
```

---

## 📚 API Reference

**Base URL:** `http://<server-ip>:5001/api/v1`

| Method | Endpoint | Description |
| :--- | :--- | :--- |
| **GET** | `/stats` | Current status of all clients (Real-time). |
| **GET** | `/stats/system` | Server-wide totals (Total traffic, active count). |
| **GET** | `/stats/<common_name>` | Detailed client stats + History. Params: `range` (24h, 7d), `resolution`. |
| **GET** | `/certificates` | List of all certificates with expiration status. **Cached (Fast)**. |
| **GET** | `/analytics` | Dashboard data (Trends, Traffic distribution, Top clients). |
| **GET** | `/health` | API Health check. |

---
*Generated by Antigravity Agent*