import { defineConfig } from 'vite'
import vue from '@vitejs/plugin-vue'
import { resolve } from 'path'
import AutoImport from 'unplugin-auto-import/vite'
import Components from 'unplugin-vue-components/vite'
import { ElementPlusResolver } from 'unplugin-vue-components/resolvers'
import compression from 'vite-plugin-compression'

// https://vitejs.dev/config/
export default defineConfig({
  plugins: [
    vue(),
    // Element Plus 自动导入
    AutoImport({
      resolvers: [ElementPlusResolver()],
      imports: ['vue', 'vue-router', 'pinia'],
      dts: 'src/types/auto-imports.d.ts',
    }),
    Components({
      resolvers: [ElementPlusResolver()],
      dts: 'src/types/components.d.ts',
    }),
    // Gzip 压缩
    compression({
      algorithm: 'gzip',
      ext: '.gz',
      threshold: 10240, // 大于 10KB 才压缩
    }),
  ],
  resolve: {
    alias: {
      '@': resolve(__dirname, 'src'),
    },
  },
  server: {
    host: '0.0.0.0',
    port: 3000,
    proxy: {
      '/api': {
        target: 'http://localhost:8000',
        changeOrigin: true,
      },
    },
  },
  build: {
    outDir: 'dist',
    sourcemap: false,
    minify: 'esbuild',
    // 块大小警告阈值
    chunkSizeWarningLimit: 500,
    rollupOptions: {
      output: {
        chunkFileNames: 'assets/js/[name]-[hash].js',
        entryFileNames: 'assets/js/[name]-[hash].js',
        assetFileNames: 'assets/[ext]/[name]-[hash].[ext]',
        // 优化的代码分割策略
        manualChunks(id) {
          // Vue 核心库
          if (id.includes('node_modules/vue') || 
              id.includes('node_modules/vue-router') || 
              id.includes('node_modules/pinia')) {
            return 'vue-vendor'
          }
          // Element Plus
          if (id.includes('node_modules/element-plus')) {
            return 'element-plus'
          }
          // ECharts
          if (id.includes('node_modules/echarts') || 
              id.includes('node_modules/vue-echarts') ||
              id.includes('node_modules/zrender')) {
            return 'echarts'
          }
          // 其他第三方库
          if (id.includes('node_modules')) {
            return 'vendor'
          }
        },
      },
    },
    // 资源内联阈值
    assetsInlineLimit: 4096,
    // CSS 代码分割
    cssCodeSplit: true,
  },
  // 预构建优化
  optimizeDeps: {
    include: [
      'vue',
      'vue-router',
      'pinia',
      'axios',
      'element-plus',
      'echarts',
      'vue-echarts',
    ],
  },
})