import { defineConfig } from 'vite'
import uni from '@dcloudio/vite-plugin-uni'
import { resolve } from 'path'
import { readFileSync, writeFileSync, existsSync, unlinkSync } from 'fs'
import dotenv from 'dotenv'
// 自定义插件：替换 manifest.json 中的 appid
// 仅在通过HBuilder首次编译时执行，避免热重载时重复执行导致内存占用高
function replaceManifestAppid() {
  return {
    name: 'replace-manifest-appid',
    buildStart() {
      // 检查是否通过HBuilder编译
      // 检查是否已经执行过插件
      const manifestUpdatedFlag = resolve(__dirname, '.manifest-updated')
      const isFirstCompile = !existsSync(manifestUpdatedFlag)
      // 仅首次编译时执行
      if (!isFirstCompile) {
        console.log('跳过 manifest appid 更新（已执行过首次编译）')
        return
      }
      // 获取环境变量，明确指定路径为项目根目录
      dotenv.config({ path: resolve(__dirname, '.env') })
      const appid = process.env.VITE_APPID
      const uni_appId = process.env.VITE_UNI_APPID
      if (appid && uni_appId) {
        // 读取 manifest.json 文件
        const manifestPath = resolve(__dirname, 'manifest.json')
        let manifestContent = readFileSync(manifestPath, 'utf-8')
        // 解析 JSON
        const manifest = JSON.parse(manifestContent)
        // 替换
        manifest.appid = uni_appId
        if (manifest['mp-weixin']) {
          manifest['mp-weixin'].appid = appid
        }
        // 写回文件
        writeFileSync(manifestPath, JSON.stringify(manifest, null, 4))
        // 创建标记文件，表示已执行过插件
        writeFileSync(manifestUpdatedFlag, 'Manifest updated by HBuilder first compile')
        console.log(`Manifest appid 已更新为: ${uni_appId}`)
        console.log(`Manifest mp-weixin appid 已更新为: ${appid}`)
      } else {
        console.warn('未找到 VITE_APPID 和 VITE_UNI_APPID 环境变量，使用默认值')
      }
    },
  }
}
// 检查是否通过HBuilder编译，决定是否启用插件
const manifestUpdatedFlag = resolve(__dirname, '.manifest-updated')
if (existsSync(manifestUpdatedFlag)) {
  unlinkSync(manifestUpdatedFlag)
  console.log('已清理 manifest 更新标记文件')
}
const plugins = manifestUpdatedFlag ? [replaceManifestAppid(), uni()] : [uni()]
export default defineConfig({
  plugins,
  resolve: {
    alias: {
      '@': resolve(__dirname, 'src'),
    },
  },
  build: {
    minify: 'terser',
    terserOptions: {
      compress: {
        drop_console: true,
        drop_debugger: true,
        pure_funcs: ['console.log'], // 移除console.log
      },
    },
    rollupOptions: {
      output: {
        // 静态资源分类打包
        assetFileNames: (assetInfo) => {
          let extType = assetInfo.name.split('.').at(1)
          if (/png|jpe?g|svg|gif|tiff|bmp|ico/i.test(extType)) {
            extType = 'img'
          } else if (/woff|woff2|eot|ttf|otf/i.test(extType)) {
            extType = 'font'
          }
          return `static/${extType}/[name]-[hash].[ext]`
        },
        // 分包
        chunkFileNames: 'static/js/[name]-[hash].js',
        entryFileNames: 'static/js/[name]-[hash].js',
        manualChunks: {
          // 将第三方库单独打包
          vue: ['vue'],
          'uview-plus': ['uview-plus'],
          'luch-request': ['luch-request'],
        },
      },
    },
    // 启用 CSS 代码分割
    cssCodeSplit: true,
    // 小于此阈值的导入或引用资源将内联为 base64 编码
    assetsInlineLimit: 4096,
    // 启用 gzip 压缩
    brotliSize: true,
  },
  // 优化选项
  optimizeDeps: {
    include: ['vue', 'uview-plus', 'luch-request'],
  },
  // 开发服务器配置
  server: {
    host: '0.0.0.0',
    port: 3000,
    open: true,
    // 代理配置
    proxy: {
      '/api': {
        target: process.env.VITE_BASE_URL,
        changeOrigin: true,
        rewrite: (path) => path.replace(/^\/api/, ''),
      },
    },
  },
})