import type { UserConfig, ConfigEnv } from 'vite'
import pkg from './package.json'
import dayjs from 'dayjs'
import { loadEnv } from 'vite'
import { resolve } from 'path'
import { generateModifyVars } from './build/generate/generateModifyVars'
import { createProxy } from './build/vite/proxy'
import { wrapperEnv } from './build/utils'
import { createVitePlugins } from './build/vite/plugin'
import { OUTPUT_DIR } from './build/constant'
import { include, exclude } from './build/vite/optimize'

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

const { dependencies, devDependencies, name, version } = pkg
const __APP_INFO__ = {
  pkg: { dependencies, devDependencies, name, version },
  lastBuildTime: dayjs().format('YYYY-MM-DD HH:mm:ss')
}

export default async ({ command, mode }: ConfigEnv): Promise<UserConfig> => {
  const root = process.cwd()

  const env = loadEnv(mode, root)

  // The boolean type read by loadEnv is a string. This function can be converted to boolean type
  const viteEnv = wrapperEnv(env)

  const { VITE_PORT, VITE_PUBLIC_PATH, VITE_PROXY, VITE_DROP_CONSOLE } = viteEnv

  const isBuild = command === 'build'

  return {
    base: VITE_PUBLIC_PATH,
    root,
    server: {
      https: false,
      // Listening on all local IPs
      host: true,
      port: VITE_PORT,
      // Load proxy configuration from .env
      proxy: createProxy(VITE_PROXY)
    },
    resolve: {
      alias: [
        {
          find: 'vue-i18n',
          replacement: 'vue-i18n/dist/vue-i18n.cjs.js'
        },
        // @/xxxx => src/xxxx
        {
          find: /\@\//,
          replacement: pathResolve('src') + '/'
        }
      ]
    },
    esbuild: {
      drop: VITE_DROP_CONSOLE ? ['console', 'debugger'] : []
    },
    build: {
      target: 'esnext',
      cssTarget: 'chrome80',
      outDir: OUTPUT_DIR,
      // minify: 'terser',
      /**
       * 当 minify=“minify:'terser'” 解开注释
       * Uncomment when minify="minify:'terser'"
       */
      // terserOptions: {
      //   compress: {
      //     keep_infinity: true,
      //     drop_console: VITE_DROP_CONSOLE,
      //   },
      // },
      // Turning off brotliSize display can slightly reduce packaging time
      reportCompressedSize: false,
      chunkSizeWarningLimit: 2000
    },
    define: {
      __APP_INFO__: JSON.stringify(__APP_INFO__)
    },

    css: {
      preprocessorOptions: {
        less: {
          modifyVars: generateModifyVars(),
          javascriptEnabled: true
        }
      }
    },

    // The vite plugin used by the project. The quantity is large, so it is separately extracted and managed
    plugins: await createVitePlugins(viteEnv, isBuild),

    optimizeDeps: { include, exclude }
  }
}