import { defineConfig, UserConfigExport } from "vite";
import vue from "@vitejs/plugin-vue";
import { resolve } from "node:path";
import { map } from "lodash";
import { existsSync, fstat, readFileSync } from "node:fs";

type ExportKey = "ingame" | "ingame_vue";
type BuildExports = Record<ExportKey, Record<string, string>>;

// https://vitejs.dev/config/
export default defineConfig(({ mode }) => {
  const target = (()=>{
    if(mode === "production" || mode === 'development'){
      return "hwe";
    }
    if(existsSync(mode)){
      return mode;
    }
    throw `invalid mode: ${mode}`;
  })();
  const tsDir = resolve(__dirname, `${target}/ts/`);

  const build_exports: BuildExports = require(`${tsDir}/build_exports.json`);

  const asset_map: Record<string, string> = {};
  for (const [key, value] of Object.entries(build_exports.ingame_vue)) {
    asset_map[key] = `${tsDir}/${value}`;
  }
  for (const [key, value] of Object.entries(build_exports.ingame)) {
    asset_map[key] = `${tsDir}/${value}`;
  }

  const versionGitPath = resolve(
    __dirname,
    target,
    "d_setting",
    "VersionGit.json"
  );
  const versionValue = (() => {
    if (!existsSync(versionGitPath)) {
      return undefined;
    }
    const versionInfo = JSON.parse(readFileSync(versionGitPath, "utf-8"));
    return versionInfo.versionGit;
  })();

  const versionTarget = versionValue ?? `${target}_dynamic`;
  const outputPath = resolve(__dirname, 'dist_js', versionTarget);

  const config: UserConfigExport = {
    build: {
      rollupOptions: {
        input: asset_map,
      },
      outDir: outputPath,
      assetsDir: 'assets',
      manifest: true,
    },
    resolve: {
      alias: {
        "@": tsDir,
        "@scss": `${target}/scss/`,
        "@util": resolve(tsDir, `util`),
      },
    },
    plugins: [vue()],
    publicDir: false,
    server: {
      middlewareMode: "html",
    }
  };

  return config;
});