import { EmitterSubscription, NativeEventEmitter, NativeModules, Platform } from 'react-native';

const LINKING_ERROR =
  `The package 'react-native-unityads' doesn't seem to be linked. Make sure: \n\n` +
  Platform.select({ ios: "- You have run 'pod install'\n", default: '' }) +
  '- You rebuilt the app after installing the package\n' +
  '- You are not using Expo managed workflow\n';

const Unityads = NativeModules.Unityads
  ? NativeModules.Unityads
  : new Proxy(
      {},
      {
        get() {
          throw new Error(LINKING_ERROR);
        },
      }
    );

const eventEmitter = new NativeEventEmitter(Unityads);

type EventType = 'onInitializationComplete' |
  'onInitializationFailed' |
  'onUnityAdsShowFailure' |
  "onUnityAdsShowStart" |
  "onUnityAdsShowClick" |
  "onUnityAdsShowComplete" |
  "onUnityAdsAdLoaded" |
  "onUnityAdsFailedToLoad";

export const addListener = (type: EventType, handler: (value: any) => void): EmitterSubscription => {
 return eventEmitter.addListener(type, handler);
};

export function initialize({ gameId, testMode }: { gameId: string, testMode: boolean }): Promise<number> {
  return Unityads.initialize(gameId, testMode);
}

export function load(placementId: string): Promise<number> {
  return Unityads.load(placementId);
}

export function show(placementId: string): Promise<number> {
  return Unityads.show(placementId);
}