import {
  NativeModules,
} from 'react-native';

const { HocNotificationService } = NativeModules;
const Emitter = new NativeEventEmitter(HocNotificationService);

class BackgroundTimer {
  constructor() {
    this.uniqueId = 0;
    this.callbacks = {};

    Emitter.addListener('HocNotificationService.timeout', (id) => {
      if (this.callbacks[id]) {
        const callbackById = this.callbacks[id];
        const { callback } = callbackById;
        if (!this.callbacks[id].interval) {
          delete this.callbacks[id];
        } else {
          RNBackgroundTimer.setTimeout(id, this.callbacks[id].timeout);
        }
        callback();
      }
    });
  }

  runBackgroundTimer(callback, delay) {
    const EventEmitter = Platform.select({
      ios: () => NativeAppEventEmitter,
      android: () => DeviceEventEmitter,
    })();
    this.start(0);
    this.backgroundListener = EventEmitter.addListener(
      'backgroundTimer',
      () => {
        this.backgroundListener.remove();
        this.backgroundClockMethod(callback, delay);
      },
    );
  }
}

export default new BackgroundTimer();