import { fileURLToPath, URL } from 'node:url'

import { defineConfig,loadEnv } from 'vite'
import type { PluginOption } from 'vite'
import vue from '@vitejs/plugin-vue'
import vueDevTools from 'vite-plugin-vue-devtools'
import AutoImport from 'unplugin-auto-import/vite'
import Components from 'unplugin-vue-components/vite'
import { ElementPlusResolver } from 'unplugin-vue-components/resolvers'

function setupPlugins(env: ImportMetaEnv): PluginOption[] {
  return [
    vue(),
    vueDevTools(),
    // topLevelAwait(),
    AutoImport({
      resolvers: [ElementPlusResolver()],
    }),
    Components({
      resolvers: [ElementPlusResolver()],
    }),
  ]
}

export default defineConfig((env) => {
  const viteEnv = loadEnv(env.mode, process.cwd()) as unknown as ImportMetaEnv
  return {
    base: viteEnv.VITE_GLOB_FRONT_CTX,
    plugins: setupPlugins(viteEnv),
    server: {
      host: '0.0.0.0',
      port:  viteEnv.VITE_GLOB_FRONT_PORT,
      open: false,
      proxy: {
        [viteEnv.VITE_GLOB_API_CTX]: {
          target: viteEnv.VITE_GLOB_API_DEV_IP,
          changeOrigin: true,
          // 转发原 Host，让后端能用 X-Forwarded-Host 拼出用户浏览器的实际 URL
          configure: (proxy) => {
            proxy.on('proxyReq', (proxyReq, req) => {
              if (req.headers.host) proxyReq.setHeader('X-Forwarded-Host', req.headers.host)
              proxyReq.setHeader('X-Forwarded-Proto', 'http')
            })
          },
        },
        // CAS 回调：service URL 形如 /metalinfo/chat_web_backend/cas/login?ticket=xxx
        // 把 /metalinfo 前缀去掉转给后端，否则 vite 当前端路由吃掉
        [`${viteEnv.VITE_GLOB_FRONT_CTX}${viteEnv.VITE_GLOB_API_CTX}`]: {
          target: viteEnv.VITE_GLOB_API_DEV_IP,
          changeOrigin: true,
          rewrite: (p) => p.replace(new RegExp(`^${viteEnv.VITE_GLOB_FRONT_CTX}`), ''),
          configure: (proxy) => {
            proxy.on('proxyReq', (proxyReq, req) => {
              if (req.headers.host) proxyReq.setHeader('X-Forwarded-Host', req.headers.host)
              proxyReq.setHeader('X-Forwarded-Proto', 'http')
            })
          },
        },
        // 工具服务通过 Nginx(:18000) 反代，sub_filter 处理子资源路径
        '/pdf/': {
          target: 'http://localhost:18000',
          changeOrigin: true,
        },
        '/draw/': {
          target: 'http://localhost:18000',
          changeOrigin: true,
        },
      },
    },
    build: {
      target: 'esnext',
    },
    resolve: {
      alias: {
        '@': fileURLToPath(new URL('./src', import.meta.url))
      },
    },
  }
})