import { buildTestQueryClient } from '../../__utils__/query_client'
import type { ApiClient } from '../../hooks/use_api_client'
import { availableFeatures, featuresQueryOptions } from '../../hooks/use_features'

const features = {
  data: [{ type: 'Feature', id: '1', name: 'QA_MOBILE_search', enabled: true }],
  links: {},
  meta: { count: 1, totalCount: 1 },
}

const buildClient = (get: jest.Mock) => ({ chat: { get } }) as unknown as ApiClient

const fetchTwice = async (get: jest.Mock, secondsBetween: number) => {
  const queryClient = buildTestQueryClient()
  const options = featuresQueryOptions(buildClient(get))

  await queryClient.fetchQuery(options)
  jest.advanceTimersByTime(secondsBetween * 1000)
  await queryClient.fetchQuery(options)
}

describe('availableFeatures', () => {
  it('never reads a web-only flag', () => {
    Object.values(availableFeatures).forEach(name => {
      expect(name).not.toMatch(/_WEB_/)
    })
  })
})

describe('featuresQueryOptions', () => {
  beforeEach(() => {
    jest.useFakeTimers()
  })

  afterEach(() => {
    jest.useRealTimers()
  })

  it('keeps successful flags fresh for five minutes', async () => {
    const get = jest.fn().mockResolvedValue(features)

    await fetchTwice(get, 4 * 60)

    expect(get).toHaveBeenCalledTimes(1)
  })

  it('refetches right away after a failed fetch', async () => {
    const get = jest.fn().mockRejectedValue({ status: 503 })

    await fetchTwice(get, 1)

    expect(get).toHaveBeenCalledTimes(2)
  })

  it('backs off for a minute after a 429', async () => {
    const get = jest.fn().mockRejectedValue({ status: 429 })
    const queryClient = buildTestQueryClient()
    const options = featuresQueryOptions(buildClient(get))

    await queryClient.fetchQuery(options)
    jest.advanceTimersByTime(30 * 1000)
    await queryClient.fetchQuery(options)
    expect(get).toHaveBeenCalledTimes(1)

    jest.advanceTimersByTime(31 * 1000)
    await queryClient.fetchQuery(options)
    expect(get).toHaveBeenCalledTimes(2)
  })
})