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

import { defineConfig, loadEnv } from 'vite'
import vue from '@vitejs/plugin-vue'
import vueJsx from '@vitejs/plugin-vue-jsx'
import UnoCSS from 'unocss/vite'
import { createSvgIconsPlugin } from 'vite-plugin-svg-icons'
import VueRouter from 'unplugin-vue-router/vite'
import Layouts from 'vite-plugin-vue-layouts'
import AutoImport from 'unplugin-auto-import/vite'
import { VueRouterAutoImports } from 'unplugin-vue-router'
import Components from 'unplugin-vue-components/vite'
import vueI18n from '@intlify/unplugin-vue-i18n/vite'
import path from 'node:path'
import { compression } from 'vite-plugin-compression2'
import { ViteImageOptimizer } from 'vite-plugin-image-optimizer'
import legacy from '@vitejs/plugin-legacy'
import { visualizer } from 'rollup-plugin-visualizer'
import vueDevTools from 'vite-plugin-vue-devtools'

// https://vite.dev/config/
export default defineConfig(({ mode }) => {
  const env = loadEnv(mode, process.cwd(), 'VITE_')
  // 如果你有其他场景判断，可修改此处，本文假设只针对生产环境
  const isProd = mode === 'prod'

  return {
    build: {
      outDir: 'dist',
      assetsDir: 'assets',
      assetsInlineLimit: 4096,
      reportCompressedSize: true,
      minify: 'terser',
      cssCodeSplit: true,
      sourcemap: !isProd,
      terserOptions: isProd
        ? {
            // 代码压缩配置
            compress: {
              drop_console: true, // 移除 console
              drop_debugger: true, // 移除 debugger
            },
            // 代码混淆配置
            mangle: {
              toplevel: true, // 混淆顶层变量名
              eval: true, // 混淆 eval 中的变量
            },
            // 输出配置
            format: {
              comments: false,
            },
          }
        : {},
      olldownOptions: {
        output: {
          codeSplitting: {
            groups: [
              {
                name: 'vue',
                test: /node_modules[\\/]vue/,
                priority: 20,
              },
              {
                name: 'vue-router',
                test: /node_modules[\\/]vue-router/,
                priority: 15,
              },
              {
                name: 'pinia',
                test: /node_modules[\\/]pinia/,
                priority: 10,
              },
            ],
          },
        },
      },
    },
    plugins: [
      VueRouter({}),
      // ⚠️ Vue must be placed after VueRouter()
      vue(),
      vueJsx(),
      UnoCSS(), // 配置 SVG 图标插件
      createSvgIconsPlugin({
        // SVG 图标目录
        iconDirs: [fileURLToPath(new URL('./src/assets/icons', import.meta.url))],
        // 生成的 symbol ID 格式
        symbolId: 'icon-[dir]-[name]',
      }),
      Layouts({
        layoutsDirs: 'src/layouts',
        defaultLayout: 'default',
      }),
      AutoImport({
        include: [
          /\.[tj]sx?$/, // .ts, .tsx, .js, .jsx
          /\.vue$/,
          /\.vue\?vue/, // .vue
          /\.md$/, // .md
        ],
        imports: ['vue', VueRouterAutoImports, 'pinia', '@vueuse/core'],
      }),
      Components({
        deep: true,
        directoryAsNamespace: false,
      }),
      vueI18n({
        // 语言包目录
        include: path.resolve(__dirname, './src/i18n/locales/**'),
        // 开发模式下也启动编译时处理
        runtimeOnly: false,
        // 仅使用组合式 API
        compositionOnly: true,
        // 完整安装
        fullInstall: true,
      }),
      // Gzip 压缩
      compression({
        algorithms: ['gzip'],
        threshold: 10240, // 超过 10KB 的文件才压缩
        deleteOriginalAssets: false, // 不删除原文件
      }),
      ViteImageOptimizer({
        png: {
          quality: 80,
        },
        jpeg: {
          quality: 80,
        },
        webp: {
          quality: 80,
        },
      }),
      legacy({
        targets: ['defaults', 'not IE 11'],
      }),
      visualizer({
        filename: 'stats.html',
      }),
      vueDevTools(),
    ],
    resolve: {
      alias: {
        '@': fileURLToPath(new URL('./src', import.meta.url)),
      },
    },
    optimizeDeps: {
      include: ['vue', 'vue-router', 'pinia', '@vueuse/core'],
    },
  }
})