import { expect, tap } from '@pushrocks/tapbundle';
import taskbuffer = require('../ts/index');

import * as smartpromise from '@pushrocks/smartpromise';
import * as smartdelay from '@pushrocks/smartdelay';

// setup some testData to work with
let testTask: taskbuffer.Task;

let testPreTask = new taskbuffer.Task({
  taskFunction: async () => {
    console.log('preTask executed');
  },
  preTask: testTask
});

// some more tasks to test with
let task1Counter = 0; // how often task 1 is being executed
let task1 = new taskbuffer.Task({
  name: 'Task 1',
  taskFunction: () => {
    let done = smartpromise.defer();
    console.log('Task1 started');
    setTimeout(() => {
      task1Counter++;
      console.log('Task1 executed');
      done.resolve();
    }, 5000);
    return done.promise;
  }
});

let task2 = new taskbuffer.Task({
  name: 'Task 1',
  taskFunction: async () => {
    const done = smartpromise.defer();
    console.log('Task2 started');
    setTimeout(() => {
      console.log('Task2 executed');
      done.resolve();
    }, 5000);
    await done.promise;
  }
});

let task3 = new taskbuffer.Task({
  name: 'Task 3',
  taskFunction: () => {
    let done = smartpromise.defer();
    console.log('Task3 started');
    setTimeout(() => {
      console.log('Task3 executed');
      done.resolve();
    }, 5000);
    return done.promise;
  }
});

tap.test('new Task() should return a new task', async () => {
  testTask = new taskbuffer.Task({
    taskFunction: async () => {
      console.log('executed twice');
    },
    preTask: testPreTask
  });
});

tap.test('expect testTask to be an instance of Task', async () => {
  expect(testTask).to.be.instanceof(taskbuffer.Task);
});

tap.test('expect testTask.idle is true', async () => {
  if (!testTask.idle) {
    throw new Error('testTask.idle is not true');
  }
});

tap.test('testTask.running should be of type boolean and initially false', async () => {
  expect(testTask.running).to.be.a('boolean');
  // tslint:disable-next-line:no-unused-expression
  expect(testTask.running).to.be.false;
});

tap.test('testTask.trigger() should return Promise', async () => {
  expect(testTask.trigger()).to.be.instanceof(Promise);
});

tap.test('testTask.trigger() returned Promise should be fullfilled', async () => {
  await testTask.trigger();
});

tap.test('expect to run a task without pre and afterTask errorless', async () => {
  let localTestTask = new taskbuffer.Task({
    taskFunction: async () => {
      console.log('only once');
    }
  });
  await localTestTask.trigger();
});

tap.test('expect task to run in buffered mode', async () => {
  let localTestTask = new taskbuffer.Task({
    taskFunction: async () => {
      await smartdelay.delayFor(3000);
    },
    buffered: true,
    bufferMax: 2
  });
  localTestTask.trigger();
  localTestTask.trigger();
  localTestTask.trigger();
  await localTestTask.trigger();
});

tap.start();