import type { UserConfig, ConfigEnv } from 'vite'
import { loadEnv } from 'vite'
import vue from '@vitejs/plugin-vue'
import Components from 'unplugin-vue-components/vite'
import { resolve } from 'path'
import { ElementPlusResolver } from 'unplugin-vue-components/resolvers'
import vueJsx from '@vitejs/plugin-vue-jsx'
import vueSetupExtend from 'vite-plugin-vue-setup-extend'
import eslintPlugin from 'vite-plugin-eslint'
import ElementPlus from 'unplugin-element-plus/vite'
import viteSvgIcons from 'vite-plugin-svg-icons'
import commonjsExternals from 'vite-plugin-commonjs-externals'

const root = process.cwd()

function pathResolve(dir: string) {
  return resolve(root, '.', dir)
}

// https://vitejs.dev/config/
export default ({ command, mode }: ConfigEnv): UserConfig => {
  let env = null
  if (command === 'serve') {
    env = loadEnv(process.argv[4], root)
  } else {
    env = loadEnv(mode, root)
  }

  return {
    base: env.VITE_BASE_PATH,
    plugins: [
      vue(),
      vueJsx(),
      vueSetupExtend(),
      ElementPlus({
        useSource: false
      }),
      Components({
        dts: true,
        deep: true,
        dirs: ['src/components', 'src/layout'],
        resolvers: [ElementPlusResolver()]
      }),
      eslintPlugin({
        cache: false,
        include: ['src/**/*.vue', 'src/**/*.ts', 'src/**/*.tsx'] // 检查的文件
      }),
      viteSvgIcons({
        // 指定需要缓存的图标文件夹
        iconDirs: [resolve(root, 'src/assets/icons')],
        // 指定symbolId格式
        symbolId: 'icon-[dir]-[name]',
        // 压缩
        svgoOptions: true
      }),
      commonjsExternals({
        externals: ['path']
      })
    ],

    css: {
      preprocessorOptions: {
        less: {
          additionalData: '@import "./src/styles/variables.less";',
          javascriptEnabled: true
        }
      }
    },
    resolve: {
      alias: [
        {
          find: /\@\//,
          replacement: pathResolve('src') + '/'
        },
        {
          find: /\_v\//,
          replacement: pathResolve('src/views') + '/'
        },
        {
          find: /\_c\//,
          replacement: pathResolve('src/components') + '/'
        }
      ]
    },
    build: {
      minify: 'terser',
      outDir: env.VITE_OUT_DIR,
      sourcemap: env.VITE_SOURCEMAP === 'true' ? 'inline' : false,
      brotliSize: false,
      terserOptions: {
        compress: {
          drop_debugger: env.VITE_DROP_DEBUGGER === 'true',
          drop_console: env.VITE_DROP_CONSOLE === 'true'
        }
      }
    },
    server: {
      proxy: {
        // 字符串简写写法
        '/foo': 'http://localhost:4567/foo',
        // 选项写法
        '/api': {
          target: 'http://jsonplaceholder.typicode.com',
          changeOrigin: true,
          rewrite: (path) => path.replace(/^\/api/, '')
        },
        // 正则表达式写法
        '^/fallback/.*': {
          target: 'http://jsonplaceholder.typicode.com',
          changeOrigin: true,
          rewrite: (path) => path.replace(/^\/fallback/, '')
        }
      }
    },
    optimizeDeps: {
      include: [
        'element-plus'
      ]
    }
  }
}