// #bluebird, #bluebird-retry, #bluebird-cancellation, #eventBus
const Promise = require('bluebird');
const retry = require('bluebird-retry');
const eventBus = require('js-event-bus')();

Promise.config({warnings: true, longStackTraces: true, cancellation: true, monitoring: true});

//promise child function
const child = () => {
    return new Promise((resolve, reject, onCancel) => {
        console.log('CALLED CHILD');
        reject(new Error('Rejected from child'));

        onCancel(() => {
            console.log('Registered cancel in child function');
        });
    });
};

//promise parent function
const parent = () => {
    return new Promise((resolve, reject, onCancel) => {
        setTimeout(async() => {
            console.log('CALLED PARENT');
            try {
                await retry(child, { max_tries: 4, interval: 500 })
            } catch (e) {
                reject(new Error('Rejected from parent function'));
            }
        },100);

        onCancel(() => {
            console.log('Registered cancel in parent function');
            retry.StopError(new Error('Stop retrying child'));
            reject(new Error('Cancelled parent'));
        });
    });
};

//background manager - should be able to stop promise chain
const backgroundProcess = () => {
    let index = 0;
    const intervalId = setInterval(() => {
        index++;
        if(index === 3) {
            console.warn('Emit stop::all event');
            eventBus.emit('stop::all');
            clearInterval(intervalId);
        }
    }, 500);
};

//another promise
const continueStack = () => {
    return new Promise((resolve, reject) => {
        console.log('started continueStack');
        setTimeout(() => {
            console.log('finished continueStack');
            resolve();
        }, 2000);
    });
};

//test route here
async function start() {
    backgroundProcess(); //fire stop:all event after 2 sec

    let promise;

    eventBus.on('stop::all', () => {
        if(promise && promise.cancel) {
            console.warn('Caught stop::all event');
            promise.cancel();
        } else {
            console.log('somehow promise was not properly set at this point');
        }
    });

    try {
        promise = parent();
        await promise; // so continueStack is not called until parent resolves, I guess this is your desire
        console.log('after parent promise');
        await continueStack();
    } catch (e) {
        console.log('Caught error in endpoint');
    }
};

start();