upstream api_backend {
    server 127.0.0.1:3001;
    keepalive 32;
}

upstream web_frontend {
    server 127.0.0.1:3000;
    keepalive 32;
}

# HTTP → HTTPS yönlendirme
server {
    listen 80;
    server_name vd.acbilisim.com;
    return 301 https://$host$request_uri;
}

# Ana uygulama
server {
    listen 443 ssl http2;
    server_name vd.acbilisim.com;

    ssl_certificate     /etc/ssl/certs/vd.acbilisim.com.crt;
    ssl_certificate_key /etc/ssl/private/vd.acbilisim.com.key;
    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 1d;

    # Security headers
    add_header X-Frame-Options DENY;
    add_header X-Content-Type-Options nosniff;
    add_header X-XSS-Protection "1; mode=block";
    add_header Strict-Transport-Security "max-age=31536000; includeSubDomains" always;
    add_header Referrer-Policy "strict-origin-when-cross-origin";

    client_max_body_size 50M;

    # API
    location /api/ {
        proxy_pass http://api_backend;
        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;
        proxy_read_timeout 60s;
        proxy_connect_timeout 10s;
    }

    # WebSocket (Socket.io)
    location /events/ {
        proxy_pass http://api_backend;
        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_read_timeout 86400s;
    }

    # Next.js frontend
    location / {
        proxy_pass http://web_frontend;
        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;
    }

    # Static files cache
    location /_next/static/ {
        proxy_pass http://web_frontend;
        add_header Cache-Control "public, max-age=31536000, immutable";
    }

    # Gzip
    gzip on;
    gzip_vary on;
    gzip_min_length 1024;
    gzip_proxied expired no-cache no-store private auth;
    gzip_types text/plain text/css application/json application/javascript text/xml application/xml application/xml+rss text/javascript;
}