import { defineConfig, loadEnv } from 'vite'
import vue from '@vitejs/plugin-vue'
import { resolve } from 'path'
import { fileURLToPath, URL } from 'node:url'
import Icons from 'unplugin-icons/vite'
import IconsResolver from 'unplugin-icons/resolver'
import Components from 'unplugin-vue-components/vite'
import path from 'node:path'
import fs from 'node:fs'
import { createRequire } from 'node:module'
import { vitePluginPrerender } from './scripts/vite-plugin-prerender.js'

// 统一处理后端 Set-Cookie，移除 Secure 标志，便于在 HTTP 开发环境保存 Cookie
const cookieRewriteConfigure = (proxy: any) => {
  proxy.on('proxyRes', (proxyRes: any) => {
    const setCookieHeaders = proxyRes.headers['set-cookie']
    if (setCookieHeaders) {
      proxyRes.headers['set-cookie'] = setCookieHeaders.map((cookie: string) => {
        return cookie
          .replace(/;\s*[Ss]ecure/gi, '')
          .replace(/,\s*[Ss]ecure/gi, '')
      })
    }
  })
}

// 读取 apps.txt 确定应用优先级（靠后优先）
function loadAppsOrder(appsDir: string) {
  const appsTxt = path.join(appsDir, 'apps.txt')
  try {
    const content = fs.readFileSync(appsTxt, 'utf-8')
    return content
      .split(/\r?\n/)
      .map((s) => s.trim())
      .filter(Boolean)
  } catch {
    return ['jingrow']
  }
}

// 计算本工程中的 apps 目录（当前文件位于 apps/jingrow/frontend/vite.config.ts）
const currentDir = fileURLToPath(new URL('.', import.meta.url))
const appsDir = path.resolve(currentDir, '..', '..')
const APPS_ORDER = loadAppsOrder(appsDir)

export default defineConfig(({ mode, command }) => {
  const env = loadEnv(mode, process.cwd(), '')
  const BACKEND_URL = env.VITE_BACKEND_SERVER_URL || 'http://localhost'
  const FRONTEND_HOST = env.VITE_FRONTEND_HOST || '0.0.0.0'
  const FRONTEND_PORT = Number(env.VITE_FRONTEND_PORT) || 3100
  const ALLOWED_HOSTS = (env.VITE_ALLOWED_HOSTS || '').split(',').map((s) => s.trim()).filter(Boolean)

  // 开发环境：文件目录路径
  const filesDir = command === 'serve' ? path.resolve(currentDir, '..', 'jingrow', 'public', 'files') : null

  return {
  plugins: [
    vue(),
    Icons({
      autoInstall: true,
      compiler: 'vue3'
    }),
    Components({
      resolvers: [
        IconsResolver({
          prefix: 'i',
          enabledCollections: ['tabler']
        }),
      ],
    }),
    // 开发环境：直接服务文件系统
    command === 'serve' && filesDir && {
      name: 'serve-files',
      configureServer(server) {
        const require = createRequire(import.meta.url)
        const serve = require('serve-static')(filesDir, { index: false })
        server.middlewares.use('/files', serve)
      }
    },
    // 预渲染插件（仅在构建时启用）
    command === 'build' && vitePluginPrerender({
      // 路由列表会自动从工具 store 生成
      // 也可以手动指定：routes: ['/', '/tools', '/tools/remove-background']
      rendererOptions: {
        maxConcurrentRoutes: 4,
        timeout: 30000,
        waitUntil: 'networkidle0'
      }
    })
  ].filter(Boolean),
  resolve: {
    alias: {
      '@': fileURLToPath(new URL('./src', import.meta.url)),
      // 跨 app 访问源码（相对计算得到的 apps 目录）
      '@apps': appsDir
    }
  },
  server: {
    host: FRONTEND_HOST,
    port: FRONTEND_PORT,
    strictPort: true,
    open: false,
    cors: true,
    // 允许通过指定域名访问开发服务器（可通过 VITE_ALLOWED_HOSTS 配置，逗号分隔）
    ...(ALLOWED_HOSTS.length ? { allowedHosts: ALLOWED_HOSTS } : {}),
    fs: {
      // 放行 monorepo apps 目录，便于 import.meta.glob 跨应用扫描
      allow: [appsDir]
    },
    proxy: {
      '/api/action': {
        target: BACKEND_URL,
        changeOrigin: true,
        secure: false,
        cookieDomainRewrite: { '*': '' },
        cookiePathRewrite: { '*': '/' },
        configure: cookieRewriteConfigure
      }
    }
  },
  build: {
    outDir: 'dist',
    assetsDir: 'assets',
    sourcemap: false,
    chunkSizeWarningLimit: 2000
  },
  define: {
    // 确保环境变量在构建时可用
    __APP_VERSION__: JSON.stringify(process.env.npm_package_version),
    // 注入 apps.txt 的应用顺序到前端
    __APPS_ORDER__: JSON.stringify(APPS_ORDER)
  }
}
})