import MPServerless from '@alicloud/mpserverless-node-sdk';
import getHttpClient from './utils/httpClient';
import { getServerSecret } from './utils/index';

interface InvokeRemoteFunctionOptions {
  /**
   * 小程序appId
   */
  appId: string;
  /**
   * 空间id
   */
  spaceId: string;
  /**
   * 函数名称
   */
  functionTarget: string;
  /**
   * 函数参数
   */
  functionArgs?: object;
}

function invokeFunction(functionService, functionTarget, functionArgs) {
  const encoder = functionService.getEncoder();

  encoder.setBodyField({
    method: 'serverless.function.runtime.invoke',
    params: {
      functionTarget,
      functionArgs,
    },
  });

  return functionService.transport.request(encoder);
}

/**
 * 调用云端函数
 */
async function invokeRemoteFunction(options: InvokeRemoteFunctionOptions) {
  const { appId, spaceId, functionTarget, functionArgs = {} } = options;

  const serverSecret = await getServerSecret(appId, spaceId);

  const mpserverless = new MPServerless({
    // 必填参数
    spaceId,
    endpoint: 'https://api.bspapp.com',
    serverSecret,
    httpClient: getHttpClient(),
    logger: console,

    // 选填参数
    //token: reqMeta.token,
    // userId: reqMeta.userId,
    //requestId: '12345678',
  });

  const result = await invokeFunction(mpserverless.function, functionTarget, functionArgs);

  return result.body;
}

export default invokeRemoteFunction;