import type { NextConfig } from "next";

const nextConfig: NextConfig = {
  // Image optimization – whitelist only known-safe domains (no wildcard **)
  images: {
    remotePatterns: [
      // GitHub avatars (OAuth)
      { protocol: "https", hostname: "avatars.githubusercontent.com" },
      // Google avatars (OAuth)
      { protocol: "https", hostname: "lh3.googleusercontent.com" },
      { protocol: "https", hostname: "lh4.googleusercontent.com" },
      { protocol: "https", hostname: "lh5.googleusercontent.com" },
      // Stack Auth CDN
      { protocol: "https", hostname: "*.stackauth.com" },
      // Prompt preview / gallery images (Cloudflare R2 / storage)
      { protocol: "https", hostname: "imagedelivery.net" },
      { protocol: "https", hostname: "images.unsplash.com" },
      // AI image CDNs
      { protocol: "https", hostname: "oaidalleapiprodscus.blob.core.windows.net" },
      { protocol: "https", hostname: "cdn.midjourney.com" },
      { protocol: "https", hostname: "image.civitai.com" },
    ],
    formats: ["image/avif", "image/webp"],
  },

  // Security headers
  async headers() {
    return [
      {
        source: "/(.*)",
        headers: [
          { key: "X-Frame-Options", value: "SAMEORIGIN" },
          { key: "X-Content-Type-Options", value: "nosniff" },
          { key: "Referrer-Policy", value: "strict-origin-when-cross-origin" },
          { key: "X-DNS-Prefetch-Control", value: "on" },
          { key: "X-Permitted-Cross-Domain-Policies", value: "none" },
          { key: "Strict-Transport-Security", value: "max-age=31536000; includeSubDomains; preload" },
          { key: "Permissions-Policy", value: "camera=(), microphone=(), geolocation=()" },
          {
            key: "Content-Security-Policy",
            value: [
              "default-src 'self'",
              "script-src 'self' 'unsafe-inline' 'unsafe-eval' https://challenges.cloudflare.com https://www.googletagmanager.com",
              "style-src 'self' 'unsafe-inline' https://fonts.googleapis.com",
              "font-src 'self' https://fonts.gstatic.com",
              "img-src 'self' data: blob: https:",
              "frame-src 'self' https://challenges.cloudflare.com",
              "connect-src 'self' https://api.openai.com https://api.anthropic.com https://generativelanguage.googleapis.com https://challenges.cloudflare.com wss: ws:",
              "media-src 'self' blob:",
              "worker-src 'self' blob:",
            ].join("; "),
          },
        ],
      },
      {
        source: "/logos/(.*)",
        headers: [
          { key: "Cache-Control", value: "public, max-age=31536000, immutable" },
        ],
      },
      {
        source: "/(.*\\.(?:svg|png|jpg|jpeg|gif|ico|woff2|woff|ttf))",
        headers: [
          { key: "Cache-Control", value: "public, max-age=86400, stale-while-revalidate=3600" },
        ],
      },
    ];
  },

  // Performance optimizations – tree-shake large packages
  experimental: {
    optimizePackageImports: [
      "lucide-react",
      "react-icons",
      "framer-motion",
      "recharts",
      "three",
      "@react-three/fiber",
      "@react-three/drei",
      "@radix-ui/react-dropdown-menu",
      "@radix-ui/react-select",
      "@radix-ui/react-tabs",
      "@radix-ui/react-tooltip",
      "@radix-ui/react-checkbox",
      "react-markdown",
      "zustand",
    ],
  },
};

export default nextConfig;