# FetchML Nginx Site Configuration
# Drop this file into /etc/nginx/sites-available/fetchml
# Then: sudo ln -s /etc/nginx/sites-available/fetchml /etc/nginx/sites-enabled/
# Test: sudo nginx -t
# Reload: sudo systemctl reload nginx

server {
    listen 80;
    server_name ml.example.com;  # CHANGE THIS to your domain
    
    # Redirect HTTP to HTTPS
    return 301 https://$server_name$request_uri;
}

server {
    listen 443 ssl http2;
    server_name ml.example.com;  # CHANGE THIS to your domain
    
    # SSL Configuration
    # CHANGE THESE paths to your actual SSL certificates
    ssl_certificate /etc/ssl/certs/ml.example.com.crt;
    ssl_certificate_key /etc/ssl/private/ml.example.com.key;
    
    # Modern SSL settings
    ssl_protocols TLSv1.3 TLSv1.2;
    ssl_prefer_server_ciphers on;
    ssl_ciphers ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305;
    ssl_session_timeout 1d;
    ssl_session_cache shared:MozSSL:10m;
    ssl_session_tickets off;
    
    # Security headers
    add_header X-Frame-Options DENY always;
    add_header X-Content-Type-Options nosniff always;
    add_header X-XSS-Protection "1; mode=block" always;
    add_header Referrer-Policy "strict-origin-when-cross-origin" always;
    add_header Strict-Transport-Security "max-age=31536000; includeSubDomains" always;
    
    # Hide nginx version
    server_tokens off;
    
    # Rate limiting for API
    limit_req_zone $binary_remote_addr zone=fetchml_api:10m rate=10r/s;
    limit_req_zone $binary_remote_addr zone=fetchml_ws:10m rate=5r/s;
    
    # Client limits
    client_max_body_size 10M;
    client_body_timeout 12s;
    client_header_timeout 12s;
    
    # Logging
    access_log /var/log/nginx/fetchml_access.log;
    error_log /var/log/nginx/fetchml_error.log warn;
    
    # WebSocket endpoint
    location /ws {
        limit_req zone=fetchml_ws burst=10 nodelay;
        
        proxy_pass http://localhost:9102;  # CHANGE PORT if needed
        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;
        
        # WebSocket timeouts
        proxy_connect_timeout 7d;
        proxy_send_timeout 7d;
        proxy_read_timeout 7d;
    }
    
    # API endpoints
    location /api/ {
        limit_req zone=fetchml_api burst=20 nodelay;
        
        proxy_pass http://localhost:9102;  # CHANGE PORT if needed
        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_set_header X-API-Key $http_x_api_key;
    }
    
    # Health check
    location /health {
        proxy_pass http://localhost:9102;  # CHANGE PORT if needed
        proxy_set_header Host $host;
        access_log off;
    }
    
    # Grafana (optional - only if you want to expose it)
    # Uncomment if you want Grafana accessible via nginx
    # location /grafana/ {
    #     proxy_pass http://localhost:3000/;
    #     proxy_set_header Host $host;
    #     proxy_set_header X-Real-IP $remote_addr;
    # }
}