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'
// import { visualizer } from 'rollup-plugin-visualizer'

export default ({ mode }: { mode: string }) => {
  const root = process.cwd()
  const env = loadEnv(mode, root)
  const { VITE_VERSION, VITE_PORT, VITE_BASE_URL, VITE_API_URL, VITE_API_PROXY_URL } = env
  const isDev = mode === 'development'
  const isDockerBuild = mode === 'docker'
  const dropConsole = env.VITE_DROP_CONSOLE === 'true'

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

  return defineConfig({
    define: {
      __APP_VERSION__: JSON.stringify(VITE_VERSION)
    },
    base: VITE_BASE_URL,
    server: {
      port: Number(VITE_PORT),
      proxy: {
        '/api': {
          target: VITE_API_PROXY_URL,
          changeOrigin: true
        },
        // Web端接口代理 - 转发到后端 /api 前缀（与 /api 一致走本地 backend）
        '/web': {
          target: VITE_API_PROXY_URL,
          changeOrigin: true,
          rewrite: (path) => `/api${path}`
        },
        // 小程序端接口代理
        '/mini': {
          target: VITE_API_PROXY_URL,
          changeOrigin: true,
          rewrite: (path) => `/api${path}`
        }
      },
      host: 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,
      // docker 镜像构建用 esbuild，内存占用远低于 terser（避免 Docker 内 OOM）
      minify: isDockerBuild ? 'esbuild' : 'terser',
      ...(isDockerBuild
        ? {
            esbuild: dropConsole ? { drop: ['console', 'debugger'] } : undefined
          }
        : {
            terserOptions: {
              compress: {
                drop_console: dropConsole,
                drop_debugger: dropConsole
              }
            }
          }),
      rollupOptions: {
        input: {
          main: path.resolve(__dirname, 'index.html'),
          'oa-fc-host': path.resolve(__dirname, 'oa-fc-host.html')
        }
      },
      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
      }),
      // docker 构建跳过预压缩，减少峰值内存；交付镜像由 Nginx 直接托管静态资源
      ...(isDockerBuild
        ? []
        : [
            viteCompression({
              verbose: false,
              disable: false,
              algorithm: 'gzip',
              ext: '.gz',
              threshold: 10240,
              deleteOriginFile: false
            })
          ]),
      ...(isDev ? [vueDevTools()] : [])
      // 打包分析
      // visualizer({
      //   open: true,
      //   gzipSize: true,
      //   brotliSize: true,
      //   filename: 'dist/stats.html' // 分析图生成的文件名及路径
      // }),
    ],
    // 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
    optimizeDeps: {
      include: [
        'echarts/core',
        'echarts/charts',
        'echarts/components',
        'echarts/renderers',
        'xlsx',
        'xgplayer',
        'crypto-js',
        'file-saver',
        'vue-img-cutter',
        '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(__dirname, paths)
}