import { UserConfig, ConfigEnv } from 'vite'
import path from "path";
import { createVitePlugins } from './config/vite/plugins'
import proxy from './config/vite/proxy';
import { VITE_DROP_CONSOLE, VITE_PORT } from './config/constant';
import { generateModifyVars } from './config/themeConfig'

function resovePath(paths: string) {
  // 如何 __dirname 找不到 需要 yarn add @types/node --save-dev
  return path.resolve(__dirname, paths);
}

// https://vitejs.dev/config/
export default ({ command, mode }: ConfigEnv): UserConfig => {
  const isBuild = command === 'build';
  console.log(command, mode);
  return {
    resolve: {
      alias: {
        "@": path.resolve(__dirname, './src'),
        '@config': resovePath('./config'),
        "@components": resovePath('./src/components'),
        '@utils': resovePath('./src/utils'),
        '@api': resovePath('./src/api'),
      }
    },
    // plugins
    plugins: createVitePlugins(isBuild),

    // css
    css: {
      preprocessorOptions: {
        less: {
          modifyVars: generateModifyVars(),
          javascriptEnabled: true,
          // 这样就能全局使用 src/assets/styles/base.less 定义的 变量
          additionalData: `@import "${resovePath('src/assets/styles/base.less')}";`
        },
      },
    },

    // server
    server: {
      hmr: { overlay: false }, // 禁用或配置 HMR 连接 设置 server.hmr.overlay 为 false 可以禁用服务器错误遮罩层
      // 服务配置
      port: VITE_PORT, // 类型： number 指定服务器端口;
      open: false, // 类型： boolean | string在服务器启动时自动在浏览器中打开应用程序；
      cors: false, // 类型： boolean | CorsOptions 为开发服务器配置 CORS。默认启用并允许任何源
      host: '0.0.0.0', // IP配置，支持从IP启动
      proxy,
    },

    // build
    build: {
      target: 'es2015',
      terserOptions: {
        compress: {
          keep_infinity: true,
          drop_console: VITE_DROP_CONSOLE,
        },
      },
      rollupOptions: {
        // 确保外部化处理那些你不想打包进库的依赖
        external: [],
        // https://rollupjs.org/guide/en/#big-list-of-options
      },
      watch: {
        // https://rollupjs.org/guide/en/#watch-options
      },
      // Turning off brotliSize display can slightly reduce packaging time
      brotliSize: false,
      chunkSizeWarningLimit: 2000,
    },
  }
};