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_min_length 1024;
  gzip_types text/plain text/css text/xml text/javascript application/x-javascript application/xml+rss application/json application/javascript;

  server {
    listen 80;
    server_name localhost;
    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;
    add_header Referrer-Policy "no-referrer-when-downgrade" always;

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

    # Next.js static files
    location /_next/static/ {
      expires 1y;
      add_header Cache-Control "public, immutable";
    }

    # Handle client-side routing
    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;
    }

    # Error pages
    error_page 404 /404.html;
    error_page 500 502 503 504 /50x.html;
  }
}