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

export default defineConfig({
  plugins: [
    vue(),
    AutoImport({
      resolvers: [ElementPlusResolver({ importStyle: 'sass' })],
      dts: false
    }),
    Components({
      resolvers: [ElementPlusResolver({ importStyle: 'sass' })],
      dts: false
    })
  ],
  resolve: {
    alias: {
      '@': path.resolve(__dirname, 'src')
    }
  },
  css: {
    preprocessorOptions: {
      scss: {
        api: 'modern-compiler',
        silenceDeprecations: ['legacy-js-api']
      }
    }
  },
  server: {
    port: 5173
  },
  build: {
    rollupOptions: {
      output: {
        manualChunks(id) {
          if (!id.includes('node_modules')) return

          if (id.includes('element-plus')) return 'element-plus'
          if (id.includes('echarts')) return 'echarts'

          if (id.includes('axios')) return 'axios'
          if (id.includes('element-china-area-data')) return 'china-area'
          if (id.includes('highlight.js')) return 'highlight'

          // other deps: let Rollup decide to avoid circular chunks
        }
      }
    }
  }
})