import type { NextConfig } from "next";

const nextConfig: NextConfig = {
  output: "standalone",
  allowedDevOrigins: ['100.107.92.66'],
  serverExternalPackages: ["node-ical"],
  env: {
    CORS_ALLOWED_ORIGINS: process.env.CORS_ALLOWED_ORIGINS,
    DEPLOYMENT_URL: process.env.DEPLOYMENT_URL,
  },
};

// Validate environment variables at build time
if (process.env.NODE_ENV === 'production' && !process.env.SKIP_ENV_VALIDATION) {
  if (!process.env.CORS_ALLOWED_ORIGINS) {
    throw new Error('Missing CORS_ALLOWED_ORIGINS environment variable in production');
  }
  if (!process.env.DEPLOYMENT_URL) {
    throw new Error('Missing DEPLOYMENT_URL environment variable in production');
  }
}

export default nextConfig;