import fs from 'fs';
import path from 'path';
import { promisify } from 'util';
import { isEmpty, head } from 'lodash';
import request from '../../utils/request';
import download, { DownloadResult } from '../../utils/download';
import unzipCloudFunction from './unzip.function';

export interface DownloadCloudFunctionOptions {
  /**
   * 服务空间ID
   */
  spaceId: string;
  /**
   * 云函数名
   */
  name: string;
  /**
   * 保存路径
   */
  path: string;
  /**
   * 小程序appId
   */
  appId: string;
  /**
   * 下载后，是否自动解压
   * @default false
   */
  unzip: boolean;
}

interface Deployment {
  downloadSignedUrl: string;
  versionNo: string;
  createdAt: string;
  modifiedAt: string;
  deploymentId: string;
}

/**
 * 下载云函数
 */
async function downloadCloudFunction(
  options: DownloadCloudFunctionOptions
): Promise<DownloadResult> {
  const { spaceId, name, path: downloadPath, appId, unzip = false } = options;

  // 1.查询云函数部署记录
  const list = await request<Deployment[]>({
    method: 'GET',
    host: 'ide',
    path: '/cli/cloud/function/deploymentList.json',
    needSign: true,
    data: {
      spaceId,
      name,
      pageNum: 1,
      pageSize: 1,
      status: '',
      appId,
    },
  });

  if (isEmpty(list)) {
    throw new Error(`云函数${name}没有部署记录`);
  }

  const dist = path.join(downloadPath, `${name}.zip`);

  // 2.下载最近部署记录 TS MODIFY
  const link = head(list)!.downloadSignedUrl;

  const donwloadResult = await download({
    link,
    dist,
  });

  if (unzip) {
    // 解压
    await unzipCloudFunction(name, dist, downloadPath);

    // 删掉zip包
    await promisify(fs.unlink)(dist);
  }

  return donwloadResult;
}

export default downloadCloudFunction;