import HMSLogger from './logger';
import { ErrorFactory } from '../error/ErrorFactory';
import { HMSAction } from '../error/HMSAction';
import { Store } from '../sdk/store';

const TAG = `[VALIDATIONS]`;

/**
 * Check only for presence(not truthy) of a value.
 * Use in places where 0, false need to be considered valid.
 */
export function isPresent(value: any) {
  return value !== undefined && value !== null;
}

/**
 * checks if RTCPeerConnection constructor is available
 */
export const validateRTCPeerConnection = () => {
  if (!isPresent(RTCPeerConnection)) {
    const error = ErrorFactory.GenericErrors.MissingRTCPeerConnection();
    HMSLogger.e(TAG, error);
    throw error;
  }
};

/**
 * navigator.mediaDevices is undefined in insecure contexts served over HTTP protocol
 */
export const validateMediaDevicesExistence = () => {
  if (!isPresent(navigator.mediaDevices)) {
    const error = ErrorFactory.GenericErrors.MissingMediaDevices();
    HMSLogger.e(TAG, error);
    throw error;
  }
};

export const validatePublishParams = (store: Store) => {
  const publishParams = store.getPublishParams();
  if (!publishParams) {
    throw ErrorFactory.GenericErrors.NotConnected(
      HMSAction.VALIDATION,
      'call addTrack after preview or join is successful',
    );
  }
};