/* eslint-env node */
/* no-op */

/** @type {import('next').NextConfig} */
const nextConfig = {
  // Enable standalone output only for production deployment
  output: process.env.NODE_ENV === "production" ? "standalone" : undefined,

  // Ensure workspace package resolves/transpiles correctly in monorepo
  transpilePackages: [],
  experimental: {
    externalDir: true,
  },

  // Tell Next to NOT bundle these server-only libs
  serverExternalPackages: [
    "pino",
    "pino-pretty",
    "pino-abstract-transport",
    "thread-stream",
    "sonic-boom",
    // Avoid flaky vendor-chunk resolution during dev for small utils
    "tailwind-merge",
  ],

  // Turbopack configuration (Next.js 15.5+)
  // Note: public turbopack options are limited; aliasing is handled via tsconfig/webpack resolutions

  // Environment variables validation
  env: {
    NEXT_PUBLIC_API_BASE: process.env.NEXT_PUBLIC_API_BASE,
    NEXT_PUBLIC_APP_NAME: process.env.NEXT_PUBLIC_APP_NAME,
    NEXT_PUBLIC_APP_VERSION: process.env.NEXT_PUBLIC_APP_VERSION,
  },

  // Image optimization
  images: {
    remotePatterns: [
      {
        protocol: "https",
        hostname: "**",
      },
    ],
  },

  // Disable ESLint blocking during production builds to avoid CI/CD failures
  eslint: {
    ignoreDuringBuilds: true,
  },

  // Security headers
  async headers() {
    return [
      {
        // Apply security headers to all routes
        source: "/(.*)",
        headers: [
          {
            key: "X-Frame-Options",
            value: "DENY",
          },
          {
            key: "X-Content-Type-Options",
            value: "nosniff",
          },
          {
            key: "Referrer-Policy",
            value: "strict-origin-when-cross-origin",
          },
          {
            key: "X-XSS-Protection",
            value: "1; mode=block",
          },
          // Content Security Policy - development-friendly
          {
            key: "Content-Security-Policy",
            value:
              process.env.NODE_ENV === "development"
                ? "default-src 'self'; script-src 'self' 'unsafe-eval' 'unsafe-inline'; style-src 'self' 'unsafe-inline'; img-src 'self' data: https:; font-src 'self' data:; connect-src 'self' https: http://localhost:* ws://localhost:*; frame-ancestors 'none';"
                : "default-src 'self'; script-src 'self' 'unsafe-eval' 'unsafe-inline'; style-src 'self' 'unsafe-inline'; img-src 'self' data: https:; font-src 'self' data:; connect-src 'self' https:; frame-ancestors 'none';",
          },
        ],
      },
    ];
  },

  // Production optimizations
  compiler: {
    // Remove console.logs in production
    removeConsole: process.env.NODE_ENV === "production",
  },

  // Keep type checking enabled; monorepo paths provide types
  typescript: { ignoreBuildErrors: false },

  // Prefer Turbopack; no custom webpack override needed
};

export default nextConfig;