import { defineConfig } from 'vite'
import vue from '@vitejs/plugin-vue'
import AutoImport from 'unplugin-auto-import/vite'
import Components from 'unplugin-vue-components/vite'
import { ElementPlusResolver } from 'unplugin-vue-components/resolvers'
import path from 'node:path'

function configuredPort(name: 'FRONTEND_PORT' | 'BACKEND_PORT', fallback: number) {
  const port = Number(process.env[name] ?? fallback)
  if (!Number.isInteger(port) || port < 1 || port > 65535) {
    throw new Error(`${name} must be an integer between 1 and 65535`)
  }
  return port
}

const frontendPort = configuredPort('FRONTEND_PORT', 16801)
const backendPort = configuredPort('BACKEND_PORT', 17861)

// https://vite.dev/config/
export default defineConfig({
  plugins: [
    vue(),
    AutoImport({
      resolvers: [ElementPlusResolver({ importStyle: 'css' })],
    }),
    Components({
      resolvers: [ElementPlusResolver({ importStyle: 'css' })],
    }),
  ],
  resolve: {
    alias: {
      '@': path.resolve(__dirname, 'src'),
    },
  },
  server: {
    port: frontendPort,
    strictPort: true,
    proxy: {
      // 一键启动脚本会将 YAML 中的后端端口注入当前 Vite 进程。
      '/modelTF': {
        target: `http://127.0.0.1:${backendPort}`,
        changeOrigin: true,
      },
    },
  },
})