import { EventEmitter } from 'events'
import { frejaLoginStatus } from './routes'
import {
  Fetcher,
  FrejaLoginStatusChecker,
  RequestInit,
} from '@skolplattformen/api'
export class FrejaChecker
  extends EventEmitter
  implements FrejaLoginStatusChecker
{
  public token: string

  private fetcher: Fetcher
  private url: string

  private cancelled = false

  constructor(fetcher: Fetcher, token: string) {
    super()
    this.fetcher = fetcher

    this.token = token
    this.url = frejaLoginStatus
    this.check()
  }

  async check(): Promise<void> {
    const response = await this.fetcher('freja-login-status', this.url)
    let status = await response.text()

    // For Freja we recieve CANCELED (with one L) - BankId returns CANCELLED (with two L)
    // To make the API consistent - we choose the same as BankId - two L
    if (status === 'CANCELED') status = 'CANCELLED'

    console.debug(status)
    this.emit(status)
    if (
      !this.cancelled &&
      status !== 'APPROVED' &&
      status !== 'ERROR' &&
      status !== 'CANCELLED'
    ) {
      setTimeout(() => this.check(), 1000)
    }
  }

  async cancel(): Promise<void> {
    this.cancelled = true
  }
}

export const checkStatus = (
  fetch: Fetcher,
  token: string,
  session: RequestInit
): FrejaLoginStatusChecker => new FrejaChecker(fetch, token)