import { cron } from './cron'
import { api } from '../api'
import { database } from '../database'
import { Batch, EventLogType } from '../types'

const TIME_INTERVAL = 1000

describe('Cron', () => {
  let spy: jest.SpyInstance
  beforeEach(async () => {
    // restore the spy created with spyOn
    jest.restoreAllMocks()
    spy = jest.spyOn(api, 'sendBatch')
    await database.reset()
  })

  it('should send a batch of items to the API if there are items in the database', async () => {
    const batch: Batch = {
      source: 'test',
      event: 'testEvent',
      description: 'Test event',
      original_created_at: new Date().toISOString(),
      type: EventLogType.EVENT,
    }

    database.setItem(batch)

    await cron.sendBatch()

    expect(spy).toHaveBeenCalledWith([batch])
  })

  it('should not send a batch of items to the API if there are no items in the database', async () => {
    await cron.sendBatch()

    expect(spy).not.toHaveBeenCalled()
  })

  it('should stop the interval when stop is called', () => {
    jest.useFakeTimers()

    cron.init(TIME_INTERVAL)
    cron.stop()

    expect(cron.getInterval()).toBeUndefined()
  })

  it('should start the interval when init is called', () => {
    jest.useFakeTimers()

    cron.init(TIME_INTERVAL)

    expect(cron.getInterval()).toBeDefined()
  })
})