/** @type {import('next').NextConfig} */
const nextConfig = {
  // Enable standalone output for production deployment
  output: 'standalone',
  
  // Turbopack configuration (Next.js 15.5+)
  turbopack: {
    // Enable Turbopack optimizations
    resolveAlias: {
      // Path aliases for cleaner imports
      '@': './src',
    },
  },

  // 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: '**',
      },
    ],
  },

  // 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',
  },

  // Note: Webpack configuration removed - using Turbopack exclusively
  // Turbopack handles bundling automatically with better performance
};

export default nextConfig;