# Nginx Configuration for Hermes Service
# This configuration provides reverse proxy with IP and API key validation

upstream hermes_service {
    server 127.0.0.1:9120;
}

server {
    listen 80;
    server_name your-domain.com;  # Replace with your actual domain or IP
    
    # Security headers
    add_header X-Content-Type-Options nosniff;
    add_header X-Frame-Options DENY;
    add_header X-XSS-Protection "1; mode=block";
    
    # Health check endpoint (no authentication required)
    location = /health {
        proxy_pass http://hermes_service;
        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;
    }
    
    # Status endpoint (no authentication required, optional)
    location = /api/v1/status {
        proxy_pass http://hermes_service;
        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;
    }
    
    # All other API endpoints require authentication
    location /api/v1/ {
        # IP restriction at Nginx level (optional, can also be handled by hermes-service)
        # allow 192.168.1.0/24;
        # allow 10.0.0.0/8;
        # deny all;
        
        # API Key validation at Nginx level (optional, can also be handled by hermes-service)
        # if ($http_x_api_key != "your-api-key-here") {
        #     return 401 "Invalid API key";
        # }
        
        proxy_pass http://hermes_service;
        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;
        
        # Timeout settings
        proxy_connect_timeout 60s;
        proxy_send_timeout 300s;
        proxy_read_timeout 300s;
    }
    
    # Root location - you might want to serve a web UI here
    location / {
        # If you have a web UI, serve it here
        # root /path/to/web/ui;
        # index index.html;
        
        # Or redirect to API documentation
        return 404 "Hermes Service API - use /api/v1 endpoints";
    }
    
    # Logging
    access_log /var/log/nginx/hermes-service-access.log;
    error_log /var/log/nginx/hermes-service-error.log;
}

# SSL Configuration (recommended for production)
# server {
#     listen 443 ssl http2;
#     server_name your-domain.com;
#     
#     ssl_certificate /path/to/certificate.crt;
#     ssl_certificate_key /path/to/private.key;
#     
#     # ... rest of the configuration same as above ...
# }