import { fileIsExist } from '@kevisual/use-config';

import { useFileStore } from '@abearxiong/use-file-store';
import fs from 'fs';
import path from 'path';

export const appsPath = useFileStore('apps', { needExists: true });

export const loadFileAppInfo = async (key: string) => {
  const directory = path.join(appsPath, key);
  if (!fileIsExist(directory)) {
    throw new Error('app not found');
  }
  const pkgs = path.join(directory, 'package.json');
  if (!fileIsExist(pkgs)) {
    throw new Error('Invalid package.json');
  }
  const json = fs.readFileSync(pkgs, 'utf-8');
  const pkg = JSON.parse(json);
  const { name, version, app } = pkg;
  if (!name || !version || !app) {
    throw new Error('Invalid package.json');
  }

  const mainEntry = path.join(directory, app.entry);
  if (!fileIsExist(mainEntry)) {
    throw new Error('Invalid main entry');
  }
  return { mainEntry, app };
};
export const deleteFileAppInfo = async (key: string) => {
  const directory = path.join(appsPath, key);
  if (!fileIsExist(directory)) {
    return;
  }
  fs.rmSync(directory, { recursive: true });
};

/**
 * @deprecated
 * @param key 
 * @returns 
 */
export const loadApp = async (key: string) => {
  const { mainEntry, app } = await loadFileAppInfo(key);
  // 1. 查询数据库，获取app信息，查看是否运行中
  // 2. 如果运行中，直接返回
  // 3. 如果不在运行中，加载app
  //  3.1 查看app的类型，如果是 system-app，直接加载
  //  3.2 如果是 micro-app，查找相关的依赖，如果依赖不存在，先加载依赖
  //  3.3 使用fork加载app
  // 4. 记录app的运行状态，程序重新启动时，重新加载
  const main = await import(mainEntry);
  return main;
};