import { defineConfig, type Plugin } from 'vite'
import { fileURLToPath, URL } from 'node:url'
import { cpSync, rmSync } from 'node:fs'
import { resolve } from 'node:path'
import vue from '@vitejs/plugin-vue'
import AutoImport from 'unplugin-auto-import/vite'
import Components from 'unplugin-vue-components/vite'
import { ElementPlusResolver } from 'unplugin-vue-components/resolvers'

const projectRoot = fileURLToPath(new URL('.', import.meta.url))

/** 富文本编辑器自托管：仅拷贝运行时必需文件到 dist/tinymce（裁剪整包 ~40MB → ~1MB）
 *  运行时经 /tinymce/ 以 <script> 标签加载 tinymce.min.js，规避打包器对 tinymce UMD 的处理问题。
 *  tinymce 6 运行时依赖：核心 js + silver 主题 + dom 模型 + 默认图标 + oxide 皮肤 + 用到的插件 */
function copyTinymceAssets(): Plugin {
  /** RichTextEditor 实际使用的插件（与 src/components/RichTextEditor.vue plugins 配置保持一致） */
  const REQUIRED_PLUGINS = ['advlist', 'lists', 'link', 'image', 'table', 'code', 'wordcount', 'autoresize']
  /** 核心文件（保持 /tinymce/ 相对路径，base_url/skin_url 据此解析） */
  const CORE_FILES = [
    'tinymce.min.js',
    'themes/silver/theme.min.js',
    'models/dom/model.min.js',
    'icons/default/icons.min.js',
    'skins/ui/oxide/skin.min.css',
    'skins/content/default/content.min.css',
  ]
  return {
    name: 'copy-tinymce-assets',
    apply: 'build',
    closeBundle() {
      const dest = resolve(projectRoot, 'dist/tinymce')
      // 先清空目标目录：防陈旧残留（完整包拷贝/历史产物）混入 dist
      rmSync(dest, { recursive: true, force: true })
      const src = resolve(projectRoot, 'node_modules/tinymce')
      for (const f of CORE_FILES) {
        cpSync(resolve(src, f), resolve(dest, f), { force: true })
      }
      for (const p of REQUIRED_PLUGINS) {
        cpSync(resolve(src, `plugins/${p}/plugin.min.js`), resolve(dest, `plugins/${p}/plugin.min.js`), { force: true })
      }
    },
  }
}

// https://vite.dev/config/
export default defineConfig({
  plugins: [
    vue(),
    // 自动导入 Vue / Vue Router / Pinia 的 API 与 Element Plus 组件
    AutoImport({
      imports: ['vue', 'vue-router', 'pinia'],
      resolvers: [ElementPlusResolver()],
      dts: 'src/types/auto-imports.d.ts',
      eslintrc: { enabled: false },
    }),
    Components({
      resolvers: [ElementPlusResolver()],
      dts: 'src/types/components.d.ts',
      dirs: ['src/components'],
    }),
    copyTinymceAssets(),
  ],
  resolve: {
    alias: {
      '@': fileURLToPath(new URL('./src', import.meta.url)),
    },
  },
  server: {
    host: '0.0.0.0',
    port: 5173,
    // 开发期把 API 请求代理到 Django 后端，Cookie 认证跨域自动处理
    proxy: {
      '/api': {
        target: 'http://127.0.0.1:8000',
        changeOrigin: true,
      },
      '/API': {
        target: 'http://127.0.0.1:8000',
        changeOrigin: true,
      },
      '/Auth': {
        target: 'http://127.0.0.1:8000',
        changeOrigin: true,
      },
      '/Query': {
        target: 'http://127.0.0.1:8000',
        changeOrigin: true,
      },
      '/Modify': {
        target: 'http://127.0.0.1:8000',
        changeOrigin: true,
      },
      '/static': {
        target: 'http://127.0.0.1:8000',
        changeOrigin: true,
      },
      '/media': {
        target: 'http://127.0.0.1:8000',
        changeOrigin: true,
      },
      // Talk 实时通道（Socket.IO）：需 ws 转发
      '/socket.io': {
        target: 'http://127.0.0.1:8000',
        ws: true,
        changeOrigin: true,
      },
    },
  },
  build: {
    outDir: 'dist',
    sourcemap: false,
    chunkSizeWarningLimit: 2000,
    // 合并全部 CSS 为单个文件：消灭按需组件产生的零碎 .css 与 css-*.js（可省约 90 个请求）
    cssCodeSplit: false,
    rollupOptions: {
      output: {
        // 归并 node_modules 公共依赖，消灭 0.1-10kB 的细碎 chunk（lodash 工具 / element-plus 小组件等）
        manualChunks(id: string) {
          if (!id.includes('node_modules')) return undefined
          if (id.includes('element-plus') || id.includes('@element-plus')) return 'element-plus'
          if (id.includes('vxe-table')) return 'vxe-table'
          if (id.includes('lodash') || id.includes('xe-utils')) return 'utils'
          if (
            id.includes('/node_modules/vue') ||
            id.includes('/node_modules/vue-router') ||
            id.includes('/node_modules/pinia') ||
            id.includes('/node_modules/@vue') ||
            id.includes('/node_modules/@vueuse')
          ) {
            return 'vue-vendor'
          }
          return 'vendor'
        },
      },
    },
  },
})