# NGINX Configuration Template for Server Panel
# Replace DOMAIN_NAME with your actual domain

# HTTP - redirect to HTTPS
server {
    listen 80;
    listen [::]:80;
    server_name DOMAIN_NAME;

    # Let's Encrypt challenge
    location /.well-known/acme-challenge/ {
        root /var/www/certbot;
    }

    # Redirect all HTTP to HTTPS
    location / {
        return 301 https://$server_name$request_uri;
    }
}

# HTTPS
server {
    listen 443 ssl http2;
    listen [::]:443 ssl http2;
    server_name DOMAIN_NAME;

    # SSL certificates
    ssl_certificate /etc/letsencrypt/live/DOMAIN_NAME/fullchain.pem;
    ssl_certificate_key /etc/letsencrypt/live/DOMAIN_NAME/privkey.pem;

    # SSL configuration (Mozilla Modern)
    ssl_protocols TLSv1.2 TLSv1.3;
    ssl_ciphers ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384;
    ssl_prefer_server_ciphers off;
    ssl_session_cache shared:SSL:10m;
    ssl_session_timeout 10m;
    ssl_stapling on;
    ssl_stapling_verify on;

    # Security headers
    add_header Strict-Transport-Security "max-age=31536000; includeSubDomains" always;

    # Logging
    access_log /var/log/nginx/serverpanel_access.log;
    error_log /var/log/nginx/serverpanel_error.log;

    # Rate limiting
    limit_req zone=general burst=20 nodelay;
    limit_conn addr 10;

    # Proxy to FastAPI application
    location / {
        proxy_pass http://serverpanel-app:8000;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection 'upgrade';
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
        proxy_cache_bypass $http_upgrade;
        
        # Timeouts
        proxy_connect_timeout 60s;
        proxy_send_timeout 60s;
        proxy_read_timeout 60s;
    }

    # WebSocket support (for future notifications)
    location /ws {
        proxy_pass http://serverpanel-app:8000;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
        proxy_read_timeout 86400;
    }

    # API rate limiting (stricter)
    location /api/ {
        limit_req zone=api burst=50 nodelay;
        proxy_pass http://serverpanel-app:8000;
        proxy_http_version 1.1;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
    }

    # Static files caching
    location /static/ {
        proxy_pass http://serverpanel-app:8000;
        proxy_cache_valid 200 1d;
        expires 1d;
        add_header Cache-Control "public, immutable";
    }

    # Health check endpoint
    location /health {
        proxy_pass http://serverpanel-app:8000;
        access_log off;
    }
}