import type { NextConfig } from "next";

const nextConfig: NextConfig = {
  output: "standalone",
  typescript: {
    ignoreBuildErrors: true,
  },
  reactStrictMode: false,
  // Prisma client must be treated as a server-side external package — it
  // must NOT be bundled into the browser/client chunks. This prevents the
  // "Module not found: Can't resolve '.prisma/client/index-browser'" error
  // during `next build` when Prisma is imported from server-only code.
  serverExternalPackages: ["@prisma/client", "@prisma/engines"],
  // Allow .prisma generated client to be resolved during build.
  outputFileTracingIncludes: {
    "/": ["./node_modules/.prisma/**/*", "./node_modules/@prisma/**/*"],
  },
  // PRD §5.6: CSP, nosniff, no-store on private files, HSTS at the proxy
  async headers() {
    return [
      {
        source: "/(.*)",
        headers: [
          // Content-Security-Policy (PRD §5.6)
          {
            key: "Content-Security-Policy",
            value: [
              "default-src 'self'",
              "script-src 'self' 'unsafe-inline' 'unsafe-eval'",
              "style-src 'self' 'unsafe-inline'",
              "img-src 'self' data: https:",
              "font-src 'self'",
              "connect-src 'self'",
              "frame-ancestors 'none'",
              "form-action 'self'",
              "base-uri 'self'",
            ].join("; "),
          },
          // X-Content-Type-Options (PRD §5.6: nosniff)
          { key: "X-Content-Type-Options", value: "nosniff" },
          // X-Frame-Options (prevent clickjacking)
          { key: "X-Frame-Options", value: "DENY" },
          // Referrer-Policy
          { key: "Referrer-Policy", value: "strict-origin-when-cross-origin" },
          // Permissions-Policy (disable camera, microphone, geolocation)
          {
            key: "Permissions-Policy",
            value: "camera=(), microphone=(), geolocation=(), payment=()",
          },
          // Strict-Transport-Security (HSTS — PRD says at the proxy, but we also set it here)
          {
            key: "Strict-Transport-Security",
            value: "max-age=63072000; includeSubDomains; preload",
          },
        ],
      },
      {
        // Private files: no-store (PRD §5.6: "no-store on private files")
        source: "/api/(.*)",
        headers: [
          { key: "Cache-Control", value: "no-store, no-cache, must-revalidate" },
          { key: "Pragma", value: "no-cache" },
        ],
      },
    ];
  },
};

export default nextConfig;