import * as admin from "firebase-admin";
import * as functions from "firebase-functions";
import * as express from "express";
import {ProtectedResourceEndpointResponse} from "oauth2-nodejs";
import {AbstractProtectedResourceEndpoint} from "./abstract_protected_resource_endpoint";

export class UserinfoEndpoint extends AbstractProtectedResourceEndpoint {

  protected handleRequest(req: express.Request, endpointInfo: ProtectedResourceEndpointResponse): Promise<string> {
    return new Promise<string>((resolve, reject) => {
      const auth = admin.auth()
      auth.getUser(endpointInfo.userId).then((userRecord) => {
        resolve(JSON.stringify({"sub": endpointInfo.userId, "name": userRecord.displayName}))
      }).catch(e => {
        reject(e)
      })
    })
  }

  protected validateScope(scopes: string[]): boolean {
    return scopes.indexOf("profile") !== -1
  }

}

export function userinfo(): functions.HttpsFunction {
  return new UserinfoEndpoint().endpoint
}