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using System;
using UnityEngine;
using GoogleMobileAds.Api;
using GoogleMobileAds.Common;

/// <summary>
/// Demonstrates how to use the Google Mobile Ads app open ad format.
/// </summary>
[AddComponentMenu("GoogleMobileAds/Samples/AppOpenAdController")]
public class AppOpenAdController : MonoBehaviour
{

    // These ad units are configured to always serve test ads.
#if UNITY_ANDROID
    private string _adUnitId = "ca-app-pub-3940256099942544/9257395921";
#elif UNITY_IPHONE
    string _adUnitId = "ca-app-pub-3940256099942544/5575463023";
#else
    private string _adUnitId = "unused";
#endif

    public bool IsAdAvailable
    {
        get
        {
            return _appOpenAd != null;
        }
    }

    public void Start()
    {
        // Initialize the Google Mobile Ads SDK.
        MobileAds.Initialize((InitializationStatus initStatus) =>
        {
            // This callback is called once the MobileAds SDK is initialized.
        });
    }

    /// <summary>
    /// Loads the app open ad.
    /// </summary>
    public void LoadAppOpenAd()
    {
    }

    /// <summary>
    /// Shows the app open ad.
    /// </summary>
    public void ShowAppOpenAd()
    {
    }
}

 // These ad units are configured to always serve test ads.
#if UNITY_ANDROID
   private string _adUnitId = "ca-app-pub-3940256099942544/9257395921";
#elif UNITY_IPHONE
   string _adUnitId = "ca-app-pub-3940256099942544/5575463023";
#else
  private string _adUnitId = "unused";
#endif

  private AppOpenAd appOpenAd;

  /// <summary>
  /// Loads the app open ad.
  /// </summary>
  public void LoadAppOpenAd()
  {
      // Clean up the old ad before loading a new one.
      if (appOpenAd != null)
      {
            appOpenAd.Destroy();
            appOpenAd = null;
      }

      Debug.Log("Loading the app open ad.");

      // Create our request used to load the ad.
      var adRequest = new AdRequest();

      // send the request to load the ad.
      AppOpenAd.Load(_adUnitId, adRequest,
          (AppOpenAd ad, LoadAdError error) =>
          {
              // if error is not null, the load request failed.
              if (error != null || ad == null)
              {
                  Debug.LogError("app open ad failed to load an ad " +
                                 "with error : " + error);
                  return;
              }

              Debug.Log("App open ad loaded with response : "
                        + ad.GetResponseInfo());

              appOpenAd = ad;
              RegisterEventHandlers(ad);
          });
  }

private void RegisterEventHandlers(AppOpenAd ad)
{
    // Raised when the ad is estimated to have earned money.
    ad.OnAdPaid += (AdValue adValue) =>
    {
        Debug.Log(String.Format("App open ad paid {0} {1}.",
            adValue.Value,
            adValue.CurrencyCode));
    };
    // Raised when an impression is recorded for an ad.
    ad.OnAdImpressionRecorded += () =>
    {
        Debug.Log("App open ad recorded an impression.");
    };
    // Raised when a click is recorded for an ad.
    ad.OnAdClicked += () =>
    {
        Debug.Log("App open ad was clicked.");
    };
    // Raised when an ad opened full screen content.
    ad.OnAdFullScreenContentOpened += () =>
    {
        Debug.Log("App open ad full screen content opened.");
    };
    // Raised when the ad closed full screen content.
    ad.OnAdFullScreenContentClosed += () =>
    {
        Debug.Log("App open ad full screen content closed.");
    };
    // Raised when the ad failed to open full screen content.
    ad.OnAdFullScreenContentFailed += (AdError error) =>
    {
        Debug.LogError("App open ad failed to open full screen content " +
                       "with error : " + error);
    };
}

// send the request to load the ad.
AppOpenAd.Load(_adUnitId, adRequest,
    (AppOpenAd ad, LoadAdError error) =>
    {
        // If the operation failed, an error is returned.
        if (error != null || ad == null)
        {
            Debug.LogError("App open ad failed to load an ad with error : " +
                            error);
            return;
        }

        // If the operation completed successfully, no error is returned.
        Debug.Log("App open ad loaded with response : " + ad.GetResponseInfo());

        // App open ads can be preloaded for up to 4 hours.
        _expireTime = DateTime.Now + TimeSpan.FromHours(4);

        _appOpenAd = ad;
    });

public bool IsAdAvailable
{
    get
    {
        return _appOpenAd != null
               && _appOpenAd.IsLoaded()
               && DateTime.Now < _expireTime;
    }
}

private void Awake()
{
    // Use the AppStateEventNotifier to listen to application open/close events.
    // This is used to launch the loaded ad when we open the app.
    AppStateEventNotifier.AppStateChanged += OnAppStateChanged;
}

private void OnDestroy()
{
    // Always unlisten to events when complete.
    AppStateEventNotifier.AppStateChanged -= OnAppStateChanged;
}

private void OnAppStateChanged(AppState state)
{
    Debug.Log("App State changed to : "+ state);

    // if the app is Foregrounded and the ad is available, show it.
    if (state == AppState.Foreground)
    {
        if (IsAdAvailable)
        {
            ShowAppOpenAd();
        }
    }
}

/// <summary>
/// Shows the app open ad.
/// </summary>
public void ShowAppOpenAd()
{
    if (appOpenAd != null && appOpenAd.CanShowAd())
    {
        Debug.Log("Showing app open ad.");
        appOpenAd.Show();
    }
    else
    {
        Debug.LogError("App open ad is not ready yet.");
    }
}

appOpenAd.Destroy();

private void RegisterReloadHandler(AppOpenAd ad)
{
    ...
    // Raised when the ad closed full screen content.
    ad.OnAdFullScreenContentClosed += ()
    {
        Debug.Log("App open ad full screen content closed.");

        // Reload the ad so that we can show another as soon as possible.
        LoadAppOpenAd();
    };
    // Raised when the ad failed to open full screen content.
    ad.OnAdFullScreenContentFailed += (AdError error) =>
    {
        Debug.LogError("App open ad failed to open full screen content " +
                       "with error : " + error);

        // Reload the ad so that we can show another as soon as possible.
        LoadAppOpenAd();
    };
}