import { defineConfig, loadEnv } from 'vite'
import vue from '@vitejs/plugin-vue'
import { fileURLToPath, URL } from 'node:url'

export default defineConfig(({ mode }) => {
  const env = loadEnv(mode, process.cwd(), '')
  // In Docker the backend is reachable at http://backend:8000 via the pmdi_net network.
  // Override with VITE_API_TARGET env var for other environments.
  const apiTarget = env.VITE_API_TARGET || 'http://localhost:8000'

  return {
    plugins: [vue()],

    resolve: {
      alias: {
        '@': fileURLToPath(new URL('./src', import.meta.url)),
      },
    },

    server: {
      host:  '0.0.0.0',
      port:  3000,
      proxy: {
        // Transparently forward all /api requests to the FastAPI backend
        '/api': {
          target:      apiTarget,
          changeOrigin: true,
          secure:      false,
        },
      },
    },
  }
})