import type { NextConfig } from 'next';

// ── Content Security Policy ────────────────────────────────────
// Locks down the public-facing site to only trusted sources.
const cspDirectives = [
  "default-src 'self'",
  "script-src 'self' 'unsafe-inline'",
  "style-src 'self' 'unsafe-inline' https://fonts.googleapis.com https://unpkg.com",
  "font-src 'self' https://fonts.gstatic.com",
  "img-src 'self' data: https://*.basemaps.cartocdn.com https://a.basemaps.cartocdn.com https://b.basemaps.cartocdn.com https://c.basemaps.cartocdn.com https://d.basemaps.cartocdn.com https://unpkg.com",
  "connect-src 'self'",
  "frame-ancestors 'none'",
  "base-uri 'self'",
  "form-action 'self'",
].join('; ');

const nextConfig: NextConfig = {
  output: 'standalone',
  images: {
    loader: 'custom',
    loaderFile: './lib/immichLoader.ts',
  },
  async headers() {
    return [
      {
        source: '/(.*)',
        headers: [
          { key: 'Content-Security-Policy', value: cspDirectives },
          { key: 'X-Content-Type-Options', value: 'nosniff' },
          { key: 'X-Frame-Options', value: 'DENY' },
          { key: 'Referrer-Policy', value: 'strict-origin-when-cross-origin' },
          {
            key: 'Permissions-Policy',
            value: 'camera=(), microphone=(), geolocation=()',
          },
          {
            key: 'Strict-Transport-Security',
            value: 'max-age=31536000; includeSubDomains',
          },
          { key: 'X-DNS-Prefetch-Control', value: 'off' },
        ],
      },
    ];
  },
};

export default nextConfig;