import { defineConfig, loadEnv } from 'vite'
import vue from '@vitejs/plugin-vue'
import path from 'path'

// 生产环境专用的Vite配置
export default defineConfig(({ mode }) => {
  const env = loadEnv(mode, process.cwd(), '')

  return {
    plugins: [vue()],

    resolve: {
      alias: {
        '@': path.resolve(__dirname, './src')
      }
    },

    // 构建配置
    build: {
      target: 'es2015',
      outDir: 'dist',
      assetsDir: 'assets',
      sourcemap: false,
      minify: 'terser',
      
      // 代码分割配置
      rollupOptions: {
        output: {
          manualChunks: {
            vue: ['vue', 'vue-router', 'pinia'],
            'element-plus': ['element-plus', '@element-plus/icons-vue'],
            echarts: ['echarts'],
            utils: ['axios']
          },
          chunkFileNames: 'assets/js/[name]-[hash].js',
          entryFileNames: 'assets/js/[name]-[hash].js',
          assetFileNames: 'assets/[ext]/[name]-[hash].[ext]'
        }
      },
      chunkSizeWarningLimit: 1000
    },

    // 环境变量配置
    define: {
      __VUE_OPTIONS_API__: true,
      __VUE_PROD_DEVTOOLS__: false,
      __APP_VERSION__: JSON.stringify('1.0.0')
    },

    // 日志级别
    logLevel: 'info'
  }
})