# Nginx configuration to proxy to Docker drone detection application
# Copy this file to /etc/nginx/sites-enabled/ on your server

upstream drone_frontend {
    server localhost:3001;  # Frontend container port
}

upstream drone_backend {
    server localhost:3002;  # Backend API container port
}

# HTTP configuration for drone detection system
server {
    listen 80;
    server_name drones.local drones.cqers.com;  # Change to your preferred domain

    # Main application - proxy to React frontend
    location / {
        proxy_pass http://drone_frontend;
        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-Forwarded-Host $host;
        proxy_set_header X-Forwarded-Port $server_port;

        # WebSocket support for real-time updates
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";

        # Timeouts
        proxy_connect_timeout 60s;
        proxy_send_timeout 60s;
        proxy_read_timeout 60s;
        
        # Handle large payloads
        client_max_body_size 10M;
    }

    # API routing - proxy to Node.js backend
    location /api/ {
        proxy_pass http://drone_backend;
        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-Forwarded-Host $host;
        proxy_set_header X-Forwarded-Port $server_port;

        # API specific headers
        proxy_set_header Content-Type application/json;
        
        # Timeouts for API calls
        proxy_connect_timeout 30s;
        proxy_send_timeout 30s;
        proxy_read_timeout 60s;
        
        # Handle large API payloads
        client_max_body_size 10M;
    }

    # Health check endpoint
    location /health {
        proxy_pass http://drone_backend;
        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 endpoint for real-time updates
    location /socket.io/ {
        proxy_pass http://drone_backend;
        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 specific headers
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
        proxy_cache_bypass $http_upgrade;
        
        # Longer timeouts for persistent connections
        proxy_connect_timeout 60s;
        proxy_send_timeout 300s;
        proxy_read_timeout 300s;
    }

    # Static assets caching (optional optimization)
    location ~* \.(js|css|png|jpg|jpeg|gif|ico|svg|woff|woff2|ttf|eot)$ {
        proxy_pass http://drone_frontend;
        proxy_set_header Host $host;
        
        # Cache static assets
        expires 1y;
        add_header Cache-Control "public, immutable";
        
        # CORS headers for assets
        add_header Access-Control-Allow-Origin "*";
    }

    # Security headers
    add_header X-Frame-Options "SAMEORIGIN" 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;
}

# HTTPS configuration (optional - uncomment and configure SSL)
# server {
#     listen 443 ssl http2;
#     server_name drones.local drones.cqers.com;
# 
#     # SSL certificate configuration (adjust paths to your certificates)
#     ssl_certificate /path/to/your/certificate.crt;
#     ssl_certificate_key /path/to/your/private.key;
# 
#     # SSL security settings
#     ssl_protocols TLSv1.2 TLSv1.3;
#     ssl_ciphers ECDHE-RSA-AES256-GCM-SHA512:DHE-RSA-AES256-GCM-SHA512:ECDHE-RSA-AES256-GCM-SHA384:DHE-RSA-AES256-GCM-SHA384;
#     ssl_prefer_server_ciphers off;
#     ssl_session_cache shared:SSL:10m;
#     ssl_session_timeout 10m;
# 
#     # Same location blocks as HTTP configuration above
#     location / {
#         proxy_pass http://drone_frontend;
#         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-Forwarded-Host $host;
#         proxy_set_header X-Forwarded-Port $server_port;
# 
#         proxy_http_version 1.1;
#         proxy_set_header Upgrade $http_upgrade;
#         proxy_set_header Connection "upgrade";
# 
#         proxy_connect_timeout 60s;
#         proxy_send_timeout 60s;
#         proxy_read_timeout 60s;
#         client_max_body_size 10M;
#     }
# 
#     location /api/ {
#         proxy_pass http://drone_backend;
#         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-Forwarded-Host $host;
#         proxy_set_header X-Forwarded-Port $server_port;
# 
#         proxy_connect_timeout 30s;
#         proxy_send_timeout 30s;
#         proxy_read_timeout 60s;
#         client_max_body_size 10M;
#     }
# 
#     location /socket.io/ {
#         proxy_pass http://drone_backend;
#         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_http_version 1.1;
#         proxy_set_header Upgrade $http_upgrade;
#         proxy_set_header Connection "upgrade";
#         proxy_cache_bypass $http_upgrade;
#         
#         proxy_connect_timeout 60s;
#         proxy_send_timeout 300s;
#         proxy_read_timeout 300s;
#     }
# 
#     # Security headers for HTTPS
#     add_header Strict-Transport-Security "max-age=31536000; includeSubDomains" always;
#     add_header X-Frame-Options "SAMEORIGIN" 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;
# }