import { defineConfig, loadEnv } from "vite"
import removeConsole from "vite-plugin-remove-console" //生产环境移除console.log
import vue from "@vitejs/plugin-vue"
import { visualizer } from "rollup-plugin-visualizer"
import compression from "vite-plugin-compression"
import path from "path"
import cssnano from "cssnano" //压缩css工具
import imagemin from "unplugin-imagemin/vite" //图片压缩工具

export default defineConfig(({ mode, command }) => {
  // 加载环境变量
  const env = loadEnv(mode, process.cwd(), "")
  const isProduction = command === "build"
  const isAnalyze = mode === "analyze"

  return {
    plugins: [
      vue(),
      imagemin({
        plugins: [
          {
            name: "imagemin-mozjpeg",
            options: {
              quality: 85
            }
          },
          {
            name: "imagemin-pngquant",
            options: {
              quality: [0.8, 0.9]
            }
          },
          {
            name: "imagemin-svgo",
            options: {
              plugins: [{ name: "removeViewBox" }, { name: "cleanupIDs", active: false }]
            }
          }
        ]
      }),
      // 生产环境才移除console
      isProduction && removeConsole(),
      // 生产环境开启gzip 压缩
      isProduction &&
        compression({
          algorithm: "gzip",
          ext: ".gz",
          threshold: 10240 // 10KB以上才压缩
        }),
      // 构建分析
      isAnalyze &&
        visualizer({
          query: "?url",
          import: "default",
          filename: "dist/stats.html",
          open: true,
          gzipSize: true
        })
    ].filter(Boolean),

    assetsInclude: ["**/*.csv"],

    css: {
      preprocessorOptions: {
        scss: {
          //全局导入自适应px转换vw vh sass函数
          additionalData: `
            @use "@/utils/px-to-vw-vh.scss" as *;
          `
        }
      },

      // 生产环境压缩 CSS
      ...(isProduction && {
        postcss: {
          plugins: [
            cssnano({
              preset: "default"
            })
          ]
        }
      })
    },

    resolve: {
      alias: {
        "@": path.resolve(__dirname, "src"),
        "@assets": path.resolve(__dirname, "src/assets"),
        "@components": path.resolve(__dirname, "src/components"),
        "@views": path.resolve(__dirname, "src/views"),
        "@utils": path.resolve(__dirname, "src/utils")
      }
    },

    server: {
      open: true,
      proxy: {
        "/api": {
          target: "http://172.16.20.3:5080",
          changeOrigin: true
          // rewrite: (path) => path.replace(/^\/api/, "")
        }
      },
      // 开发服务器优化
      cors: true,
      hmr: {
        overlay: true
      }
    },

    build: {
      target: "es2018", // JavaScript 代码，转换成兼容 ES2018 标准的代码
      chunkSizeWarningLimit: 1000, // 减少警告
      reportCompressedSize: false,
      assetsInlineLimit: 4096, // 资源内联限制优化
      rollupOptions: {
        output: {
          // 手动代码分割优化
          manualChunks: (id) => {
            if (id.includes("node_modules")) {
              // 将大的第三方库单独分包
              if (id.includes("echarts") || id.includes("zrender")) return "vendor-echarts"
              if (id.includes("element-plus")) return "vendor-element"
              if (id.includes("vue")) return "vendor-vue"
              if (id.includes("lodash") || id.includes("underscore")) return "vendor-lodash"
              return "vendor"
            }
            // 路由级别代码分割
            if (id.includes("/views/") || id.includes("/pages/")) {
              const match = id.match(/(?:views|pages)\/([^/]+)/)
              if (match && match[1]) {
                return `view-${match[1]}`
              }
            }
          },
          // 环境差异化命名
          chunkFileNames: isProduction ? "js/[name]-[hash:8].js" : "js/[name].js",
          entryFileNames: isProduction ? "js/[name]-[hash:8].js" : "js/[name].js",
          // 优化的资源文件处理
          assetFileNames: (assetInfo) => {
            if (!assetInfo.names || assetInfo.names.length === 0)
              return "assets/[name]-[hash][extname]"
            const ext = assetInfo.names[0].split(".").pop().toLowerCase()
            const hash = isProduction ? "-[hash:8]" : ""
            // 精细化文件分类
            const assetMap = {
              // 图片
              png: "img",
              jpeg: "img",
              jpg: "img",
              gif: "img",
              svg: "img",
              webp: "img",
              avif: "img",
              ico: "img",

              // 样式
              css: "css",
              less: "css",
              scss: "css",
              sass: "css",

              // 字体
              woff: "fonts",
              woff2: "fonts",
              eot: "fonts",
              ttf: "fonts",
              otf: "fonts",

              // 媒体
              mp4: "media",
              webm: "media",
              ogg: "media",
              mp3: "media",
              wav: "media",

              // 数据
              json: "data",
              xml: "data",
              csv: "data"
            }
            const dir = assetMap[ext] || "assets"
            return `${dir}/[name]${hash}[extname]`
          }
        }
      }
    },

    // 预览服务器配置
    preview: {
      port: 4173,
      open: true,
      cors: true
    },
    // ESBuild 优化
    esbuild: {
      drop: isProduction ? ["console", "debugger"] : []
    }
  }
})