import { defineConfig, loadEnv } from "vite";
import path from "path";
import plugins from "./.build/plugins";
import { APP_VERSION, APP_NAME } from "./src/config/version";

// https://vite.dev/config/
export default defineConfig((cnf) => {

  const { mode } = cnf;
  const env = loadEnv(mode, process.cwd());
  const { VITE_APP_ENV } = env;
  return {
    // 注入全局常量，供 index.html 和项目代码使用
    define: {
      __APP_VERSION__: JSON.stringify(APP_VERSION),
      __APP_NAME__: JSON.stringify(APP_NAME),
    },
    base: VITE_APP_ENV === "production" ? "/" : "/",
    plugins: plugins(cnf),
    resolve: {
      alias: {
        "@": path.resolve(__dirname, "./src"),
        "@components": path.resolve(__dirname, "./src/vue-element-plus-y/components"),
      },
    },
    css: {
      // css全局变量使用，@/styles/variable.scss文件
      preprocessorOptions: {
        scss: {
          additionalData: '@use "@/styles/var.scss" as *;',
        },
      },
    },

    // 构建优化配置
    build: {
      target: 'es2015',
      cssTarget: 'chrome80',
      // 代码分割策略
      rollupOptions: {
        output: {
          // 分包策略 - 更精细的分割以提高加载速度
          manualChunks: (id) => {
            // Vue 核心库
            if (id.includes('node_modules/vue/') || id.includes('node_modules/@vue/') || id.includes('node_modules/vue-router/')) {
              return 'vue-vendor';
            }
            // Pinia 状态管理
            if (id.includes('node_modules/pinia/')) {
              return 'pinia';
            }
            // Element Plus UI 库
            if (id.includes('node_modules/element-plus/') || id.includes('node_modules/@element-plus/')) {
              return 'element-plus';
            }
            // Markdown 相关
            if (id.includes('node_modules/unified/') || id.includes('node_modules/remark-') || id.includes('node_modules/rehype-') || id.includes('node_modules/marked/')) {
              return 'markdown';
            }
            // 工具库
            if (id.includes('node_modules/lodash-es/') || id.includes('node_modules/@vueuse/')) {
              return 'utils';
            }
            // 代码高亮
            if (id.includes('node_modules/highlight.js/') || id.includes('node_modules/shiki/')) {
              return 'highlight';
            }
            // 图表库
            if (id.includes('node_modules/echarts/')) {
              return 'echarts';
            }
            // PDF 处理
            if (id.includes('node_modules/pdfjs-dist/')) {
              return 'pdf';
            }
            // 其他第三方库
            if (id.includes('node_modules/')) {
              return 'vendor';
            }
          },
          // 文件命名
          chunkFileNames: 'js/[name]-[hash].js',
          entryFileNames: 'js/[name]-[hash].js',
          assetFileNames: (assetInfo) => {
            const name = assetInfo.name || '';
            if (name.endsWith('.css')) {
              return 'css/[name]-[hash][extname]';
            }
            if (/\.(png|jpe?g|gif|svg|webp|ico)$/.test(name)) {
              return 'images/[name]-[hash][extname]';
            }
            if (/\.(woff2?|eot|ttf|otf)$/.test(name)) {
              return 'fonts/[name]-[hash][extname]';
            }
            return '[ext]/[name]-[hash][extname]';
          },
        },
      },
      // 压缩配置
      minify: 'terser',
      terserOptions: {
        compress: {
          drop_console: VITE_APP_ENV === 'production',
          drop_debugger: VITE_APP_ENV === 'production',
          pure_funcs: VITE_APP_ENV === 'production' ? ['console.log', 'console.info'] : [],
        },
      },
      // chunk 大小警告限制
      chunkSizeWarningLimit: 1000,
      // 启用 CSS 代码分割
      cssCodeSplit: true,
      // 构建后是否生成 source map
      sourcemap: VITE_APP_ENV !== 'production',
    },

    // 性能优化
    optimizeDeps: {
      include: [
        'vue',
        'vue-router',
        'pinia',
        'element-plus',
        '@element-plus/icons-vue',
        'lodash-es',
        '@vueuse/core',
        '@fortawesome/vue-fontawesome',
        '@fortawesome/fontawesome-svg-core',
        '@fortawesome/free-solid-svg-icons',
      ],
      // 强制预构建依赖
      force: false,
      // 排除不需要优化的依赖
      exclude: [],
    },

    // 预加载设置
    preview: {
      // 预览服务配置
    },

    // 实验性功能
    experimental: {
      // 启用渲染内联 CSS（提高首次加载速度）
      renderBuiltUrl(filename, { hostType }) {
        // 生产环境使用相对路径
        if (hostType === 'js') {
          return { runtime: `window.__assetsPath(${JSON.stringify(filename)})` };
        }
        return { relative: true };
      },
    },

    server: {
      port: 17001,
      open: true,
      proxy: {
        [env.VITE_WEB_BASE_API]: {
          target: env.VITE_API_URL,
          changeOrigin: true,
          rewrite: (path) => path.replace(`${[env.VITE_WEB_BASE_API]}`, ""),

          //查看真实代理url
          bypass(req, res, options) {
            //@ts-ignore
            const proxyUrl = new URL(options.rewrite(req.url) || '',(options.target)as string)?.href || '';
            req.headers['x-req-proxyUrl'] = proxyUrl
            res.setHeader('x-res-proxyUrl',proxyUrl)
          },
        }
      },
    },

  };
});