import Tracktor from './index'

import { VISITOR_ID, SESSION_STAMP, DEVICE_ID } from './storage'

const userConfig = {
  hostname: 'www.domain.com',
  userAgent: 'jest-unit-tester',
}

const storage = {
  list: {},
  get: key => storage.list[key],
  set: (key, name, options) => {
    storage.list[key] = name
  },
}

const visitorId = 'visitorId'
const sessionStamp = 12345
const deviceId = 'w_deviceId'

describe('Tracktor', () => {
  describe('eventBuffer not configured', () => {
    it('Should throw an error if the eventBuffer is not initialized', () => {
      expect(() => new Tracktor(userConfig, storage)).toThrow()
    })
  })

  describe('eventBuffer configured', () => {
    beforeAll(() => {
      Tracktor.initializeEventBuffer({ sendUrl: 'url', appName: 'tracktor-UT' })
    })

    it('Should be able to initialize Tracktor with the userAgent & generate visitorId, sessionStamp & deviceId', () => {
      const tracktor = new Tracktor(userConfig, storage)
      const config = tracktor.userConfig
      expect(config).toEqual(userConfig)
      expect(config.deviceId.startsWith('w_')).toBe(true)
      expect(config.sessionStamp).toBeDefined()
      expect(typeof config.sessionStamp).toBe('number')
      expect(config.visitorId).toBeDefined()
    })

    it('Should be able to provide the visitorId during the initialization', () => {
      const tracktor = new Tracktor({ ...userConfig, visitorId }, storage)
      expect(tracktor.userConfig.visitorId).toBe(visitorId)
    })

    it('Should be able to provide the sessionStamp during the initialization', () => {
      const tracktor = new Tracktor({ ...userConfig, sessionStamp }, storage)
      expect(tracktor.userConfig.sessionStamp).toBe(sessionStamp)
    })

    it('Should be able to provide the deviceId during the initialization', () => {
      const tracktor = new Tracktor({ ...userConfig, deviceId }, storage)
      expect(tracktor.userConfig.deviceId).toBe(deviceId)
    })

    it('Should get visitorId, sessionStamp & deviceId from the storage', () => {
      storage.list = {
        [VISITOR_ID]: visitorId,
        [SESSION_STAMP]: sessionStamp,
        [DEVICE_ID]: deviceId,
      }
      const tracktor = new Tracktor(userConfig, storage)
      const config = tracktor.userConfig
      expect(config.deviceId).toBe(storage.list[DEVICE_ID])
      expect(config.sessionStamp).toBe(storage.list[SESSION_STAMP])
      expect(config.visitorId).toBe(storage.list[VISITOR_ID])
    })

    it('Should be able to update userId config', () => {
      const userId = 'user-id'
      const tracktor = new Tracktor(userConfig, storage)
      expect(tracktor.userConfig.userId).toBeUndefined()
      tracktor.updateUserId(userId)
      expect(tracktor.userConfig.userId).toBe(userId)
      tracktor.updateUserId(undefined)
      expect(tracktor.userConfig.userId).toBeUndefined()
    })
  })
})