import { UserConfigExport } from "vite";
import vue from "@vitejs/plugin-vue";
import { resolve } from "path";
import * as fs from "fs";

const inputDir = resolve(process.cwd(), "./src/component");

const inputsArray = fs.readdirSync(inputDir).filter((name) => {
  const componentDir = resolve(inputDir, name);
  const isDir = fs.lstatSync(componentDir).isDirectory();
  return isDir && fs.readdirSync(componentDir).includes("index.ts");
});

const inputs = inputsArray.reduce((backObj, pkgName) => {
  backObj[pkgName] = resolve(
    process.cwd(),
    `./src/component/${pkgName}/index.ts`
  );
  return backObj;
}, {});

inputs["index"] = resolve(process.cwd(), "./src/index.ts");

export default (): UserConfigExport => {
  return {
    publicDir: false,
    resolve: {
      alias: [
        {
          find: "@",
          replacement: resolve(process.cwd(), "./"),
        },
      ],
    },
    css: {
      preprocessorOptions: {
        less: {
          javascriptEnabled: true,
        },
      },
      postcss: {},
    },
    plugins: [vue()],
    build: {
      cssCodeSplit: true,
      emptyOutDir: true,
      outDir: "es",
      lib: {
        entry: "./index.ts",
        formats: ["es"],
      },
      rollupOptions: {
        input: inputs,
        output: {
          globals: {
            vue: "Vue",
          },
          entryFileNames: ({ name }) => {
            return name === "index" ? "index.js" : "[name]/index.js";
          },
          assetFileNames: "[name]/index.css",
        },
        external: ["vue", "vue-router"],
      },
    },
  };
};