import { defineConfig, loadEnv } from 'vite'
import vue from '@vitejs/plugin-vue'
import path from 'path'
import { fileURLToPath } from 'url'
import vueDevTools from 'vite-plugin-vue-devtools'
import viteCompression from 'vite-plugin-compression'
import Components from 'unplugin-vue-components/vite'
import AutoImport from 'unplugin-auto-import/vite'
import ElementPlus from 'unplugin-element-plus/vite'
import { ElementPlusResolver } from 'unplugin-vue-components/resolvers'
import tailwindcss from '@tailwindcss/vite'

// @photo/admin：dev 固定 5176（CORS_ORIGINS 已包含）；/v1 代理到本机 API(8080)，
// 仅作用于 `vite dev`——生产由网关同源挂载 /v1（同 apps/viewer 约定）。
// host 显式 127.0.0.1：Windows 下 localhost 默认可能只绑 [::1]，代理/e2e 探活走 IPv4。
export default ({ mode }: { mode: string }) => {
  const root = process.cwd()
  const env = loadEnv(mode, root)
  // .env 不入库（仓库约定）：缺省时给兜底值，保证全新 clone 可直接构建
  const VITE_VERSION = env.VITE_VERSION || '0.1.0'
  const VITE_BASE_URL = env.VITE_BASE_URL || '/'

  console.log(`🚀 VERSION = ${VITE_VERSION}`)

  return defineConfig({
    define: {
      __APP_VERSION__: JSON.stringify(VITE_VERSION)
    },
    base: VITE_BASE_URL,
    server: {
      host: '127.0.0.1',
      port: 5176,
      strictPort: true,
      proxy: {
        '/v1': {
          target: 'http://127.0.0.1:8080',
          changeOrigin: true
        }
      }
    },
    preview: {
      host: '127.0.0.1',
      port: 5176,
      strictPort: true
    },
    // 路径别名
    resolve: {
      alias: {
        '@': fileURLToPath(new URL('./src', import.meta.url)),
        '@views': resolvePath('src/views'),
        '@imgs': resolvePath('src/assets/images'),
        '@icons': resolvePath('src/assets/icons'),
        '@utils': resolvePath('src/utils'),
        '@stores': resolvePath('src/store'),
        '@styles': resolvePath('src/assets/styles')
      }
    },
    build: {
      target: 'es2015',
      outDir: 'dist',
      chunkSizeWarningLimit: 2000,
      minify: 'terser',
      terserOptions: {
        compress: {
          // 生产环境去除 console
          drop_console: true,
          // 生产环境去除 debugger
          drop_debugger: true
        }
      },
      dynamicImportVarsOptions: {
        warnOnError: true,
        exclude: [],
        include: ['src/views/**/*.vue']
      }
    },
    plugins: [
      vue(),
      tailwindcss(),
      // 自动按需导入 API
      AutoImport({
        imports: ['vue', 'vue-router', 'pinia', '@vueuse/core'],
        dts: 'src/types/import/auto-imports.d.ts',
        resolvers: [ElementPlusResolver()],
        eslintrc: {
          enabled: true,
          filepath: './.auto-import.json',
          globalsPropValue: true
        }
      }),
      // 自动按需导入组件
      Components({
        dts: 'src/types/import/components.d.ts',
        resolvers: [ElementPlusResolver()]
      }),
      // 按需定制主题配置
      ElementPlus({
        useSource: true
      }),
      // 压缩
      viteCompression({
        verbose: false, // 是否在控制台输出压缩结果
        disable: false, // 是否禁用
        algorithm: 'gzip', // 压缩算法
        ext: '.gz', // 压缩后的文件名后缀
        threshold: 10240, // 只有大小大于该值的资源会被处理 10240B = 10KB
        deleteOriginFile: false // 压缩后是否删除原文件
      }),
      vueDevTools()
    ],
    // 依赖预构建：避免运行时重复请求与转换，提升首次加载速度
    // @photo/admin 裁剪：echarts/xlsx/xgplayer/file-saver/vue-img-cutter 等演示依赖已移除
    optimizeDeps: {
      include: [
        'crypto-js',
        'element-plus/es',
        'element-plus/es/components/*/style/css',
        'element-plus/es/components/*/style/index'
      ]
    },
    css: {
      preprocessorOptions: {
        // sass variable and mixin
        scss: {
          additionalData: `
            @use "@styles/core/el-light.scss" as *;
            @use "@styles/core/mixin.scss" as *;
          `
        }
      },
      postcss: {
        plugins: [
          {
            postcssPlugin: 'internal:charset-removal',
            AtRule: {
              charset: (atRule) => {
                if (atRule.name === 'charset') {
                  atRule.remove()
                }
              }
            }
          }
        ]
      }
    }
  })
}

function resolvePath(paths: string) {
  return path.resolve(fileURLToPath(new URL('.', import.meta.url)), paths)
}