events {
    worker_connections 1024;
}

http {
    include /etc/nginx/mime.types;
    default_type application/octet-stream;

    # Logging
    access_log /var/log/nginx/access.log;
    error_log /var/log/nginx/error.log;

    # Performance
    sendfile on;
    tcp_nopush on;
    tcp_nodelay on;
    keepalive_timeout 65;
    types_hash_max_size 2048;

    # Gzip compression
    gzip on;
    gzip_vary on;
    gzip_proxied any;
    gzip_comp_level 6;
    gzip_types text/plain text/css text/xml text/javascript
               application/json application/javascript application/xml+rss
               application/wasm;

    server {
        listen 80;
        server_name _;
        root /usr/share/nginx/html;
        index index.html;

        # 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;

        # WASM mime type
        location ~* \.wasm$ {
            types { application/wasm wasm; }
            add_header Cache-Control "public, max-age=31536000, immutable";
        }

        # Static assets caching
        location /_next/static/ {
            add_header Cache-Control "public, max-age=31536000, immutable";
        }

        # Next.js static files
        location ~* \.(js|css|png|jpg|jpeg|gif|ico|svg|woff|woff2|ttf|eot)$ {
            expires 1y;
            add_header Cache-Control "public, max-age=31536000, immutable";
        }

        # HTML files - no cache
        location ~* \.html$ {
            add_header Cache-Control "no-cache, no-store, must-revalidate";
        }

        # SPA fallback - serve index.html for all routes
        location / {
            try_files $uri $uri.html $uri/ /index.html;
        }

        # Health check endpoint
        location /health {
            access_log off;
            return 200 "healthy\n";
            add_header Content-Type text/plain;
        }
    }
}