vite.config.ts

import { defineConfig, loadEnv } from 'vite'
import react from '@vitejs/plugin-react'

// https://vite.dev/config/
export default defineConfig(({ mode }) => {
  // Fail the build/dev-server startup immediately if VITE_API_BASE_URL is
  // missing, instead of silently shipping a bundle with no configured API
  // base URL (which would only surface as a runtime error in the browser).
  const env = loadEnv(mode, process.cwd(), 'VITE_')
  if (!env.VITE_API_BASE_URL) {
    throw new Error(
      'Missing required environment variable VITE_API_BASE_URL. ' +
      'Set it in your .env.local for local development, or as a build-time ' +
      'variable in CI/CD before running `vite build`.'
    )
  }

  return {
    plugins: [react()],
  }
})