import { ConnectionOptions, Worker, Queue, Job, JobsHash, Scheduler } from 'node-resque';

class AddJob implements Job<number> {
    plugins: string[] = ['JobLock'];

    pluginOptions = {
        JobLock: {}
    };

    perform(...args: number[]): Promise<number> {
        const answer = args[0] + args[1];
        return new Promise((resolve) => { setTimeout(resolve, 1000); })
            .then(() => answer);
    }
}

class SubtractJob implements Job<number> {
    perform(...args: number[]): Promise<number> {
        const answer = args[0] - args[1];
        return Promise.resolve(answer);
    }
}

const connection: ConnectionOptions = { host: 'localhost', port: 6379 };
const connectionWithCustomRedis: ConnectionOptions = { redis: "fake_redis_client" };
const queues = ['math', 'otherQueue'];
const jobs: JobsHash = {
    add: new AddJob(),
    subtract: new SubtractJob()
};

const worker = new Worker({ connection, queues }, jobs);
const queue = new Queue({ connection }, jobs);
const scheduler = new Scheduler({ connection });

// register for worker events
worker.on('start', () => { console.log('worker started'); });
worker.on('end', () => { console.log('worker ended'); });
worker.on('cleaning_worker', (worker) => { console.log(`cleaning old worker ${worker}`); });
worker.on('poll', (queue) => { console.log(`worker polling ${queue}`); });
worker.on('ping', (time) => { console.log(`worker check in @ ${time}`); });
worker.on('job', (queue, job) => { console.log(`working job ${queue} ${JSON.stringify(job)}`); });
worker.on('reEnqueue', (queue, job, plugin) => { console.log(`reEnqueue job (${plugin}) ${queue} ${JSON.stringify(job)}`); });
worker.on('success', (queue, job, result) => { console.log(`job success ${queue} ${JSON.stringify(job)} >> ${result}`); });
worker.on('failure', (queue, job, failure) => { console.log(`job failure ${queue} ${JSON.stringify(job)} >> ${failure}`); });
worker.on('error', (error, queue, job) => { console.log(`error ${queue} ${JSON.stringify(job)} >> ${error}`); });
worker.on('pause', () => { console.log('worker paused'); });

// register for scheduler events
scheduler.on('start', () => { console.log('scheduler started'); });
scheduler.on('end', () => { console.log('scheduler ended'); });
scheduler.on('poll', () => { console.log('scheduler polling'); });
scheduler.on('master', () => { console.log('scheduler became master'); });
scheduler.on('cleanStuckWorker', (workerName, errorPayload, delta) => { console.log(`failing ${workerName} (stuck for ${delta}s) and failing job ${errorPayload}`); });
scheduler.on('error', (error) => { console.log(`scheduler error >> ${error}`); });
scheduler.on('workingTimestamp', (timestamp) => { console.log(`scheduler working timestamp ${timestamp}`); });
scheduler.on('transferredJob', (timestamp, job) => { console.log(`scheduler enquing job ${timestamp} >> ${JSON.stringify(job)}`); });

// register for queue events
queue.on('error', (error) => { console.log(error); });

// start worker
worker.connect().then(() => worker.start());

// start scheduler
scheduler.connect().then(() => scheduler.start());

queue.connect().then(async () => {
    queue.enqueue('math', 'add', [1, 2]);
    queue.enqueue('math', 'add', [1, 2]);
    queue.enqueue('math', 'add', [2, 3]);
    queue.enqueueIn(3000, 'math', 'subtract', [2, 1]);
    queue.enqueueAt(3000, 'math', 'substract', [2, 1]);

    const stats = queue.stats();
    const queues = queue.queues();
    await queue.delQueue('math');

    const length = await queue.length('math');
    const numberOfJobsDeleted = await queue.del('math', 'add', undefined, 6);
    const timestamps = await queue.delDelayed('math', 'add', [1, 2]);
    const scheduledAt = await queue.scheduledAt('math', 'add', [1, 2]);

    const timestamps2 = await queue.timestamps();
    const jobsEnqueuedForThisTimestamp = await queue.delayedAt(timestamps2[0]);
    const jobs = queue.allDelayed();

    const workers = await queue.workers();
    const workerStatus = await queue.workingOn('math', ['foo', 'bar']);
    const details = await queue.allWorkingOn();
    const failedCount = await queue.failedCount();

    const failedJob = {
        worker: 'busted-worker-3',
        queue: 'busted-queue',
        payload: { class: 'busted_job', queue: 'busted-queue', args: [ 1, 2, 3 ] },
        exception: 'ERROR_NAME',
        error: 'I broke',
        failed_at: 'Sun Apr 26 2015 14:00:44 GMT+0100 (BST)',
        backtrace: ['killed by', 'queue#forceCleanWorker'],
    };

    await queue.removeFailed(failedJob);
    await queue.retryAndRemoveFailed(failedJob);
});