import type { NextConfig } from "next";

const isProd = process.env.NODE_ENV === "production";
const csp = [
  "default-src 'self'",
  // Next.js needs inline bootstrap scripts; nonces are not used because pages are statically cached. No eval in production.
  isProd ? "script-src 'self' 'unsafe-inline'" : "script-src 'self' 'unsafe-inline' 'unsafe-eval'",
  "style-src 'self' 'unsafe-inline'",
  "img-src 'self' data: blob:",
  "font-src 'self' data:",
  "connect-src 'self'",
  "object-src 'none'",
  "base-uri 'self'",
  "form-action 'self'",
  "frame-ancestors 'none'",
  "upgrade-insecure-requests",
].join("; ");

const securityHeaders = [
  { 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=(), browsing-topics=()" },
  { key: "Strict-Transport-Security", value: "max-age=63072000; includeSubDomains" },
  { key: "Cross-Origin-Opener-Policy", value: "same-origin" },
  { key: "Content-Security-Policy", value: csp },
];

const nextConfig: NextConfig = {
  poweredByHeader: false,
  reactStrictMode: true,
  serverExternalPackages: ["postgres", "@node-rs/argon2"],
  async headers() {
    return [
      { source: "/(.*)", headers: securityHeaders },
      { source: "/admin/:path*", headers: [{ key: "X-Robots-Tag", value: "noindex, nofollow" }, { key: "Cache-Control", value: "no-store" }] },
      { source: "/login", headers: [{ key: "X-Robots-Tag", value: "noindex, nofollow" }, { key: "Cache-Control", value: "no-store" }] },
      { source: "/api/admin/:path*", headers: [{ key: "X-Robots-Tag", value: "noindex" }, { key: "Cache-Control", value: "no-store" }] },
    ];
  },
};
export default nextConfig;