events {
  worker_connections 1024;
}

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

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

  client_max_body_size 100M;

  gzip on;
  gzip_types text/plain text/css application/json application/javascript;

  upstream imageforge_api {
    server api:8080;
  }

  server {
    listen 80;
    server_name _;

    add_header X-Content-Type-Options "nosniff" always;
    add_header X-Frame-Options "SAMEORIGIN" always;
    add_header Referrer-Policy "strict-origin-when-cross-origin" always;
    add_header Permissions-Policy "camera=(), microphone=(), geolocation=()" always;
    add_header Content-Security-Policy "default-src 'self'; base-uri 'self'; object-src 'none'; frame-ancestors 'self'; form-action 'self'; img-src 'self' data: blob: https:; font-src 'self' data:; style-src 'self' 'unsafe-inline'; script-src 'self'; connect-src 'self' https:" always;

    root /usr/share/nginx/html;

    location /api/ {
      proxy_pass http://imageforge_api;
      proxy_set_header Host $host;
      proxy_set_header X-Real-IP $remote_addr;
      proxy_set_header X-Forwarded-For $remote_addr;
      proxy_set_header X-Forwarded-Proto $scheme;
    }

    location /downloads/ {
      proxy_pass http://imageforge_api;
      proxy_set_header Host $host;
      proxy_set_header X-Real-IP $remote_addr;
      proxy_set_header X-Forwarded-For $remote_addr;
      proxy_set_header X-Forwarded-Proto $scheme;
    }

    location /health {
      proxy_pass http://imageforge_api;
    }

    # Prometheus should scrape the API container directly on the private network.
    location = /metrics {
      return 404;
    }

    # SPA fallback
    location / {
      try_files $uri $uri/ /index.html;
    }
  }
}