// Copyright 2015 Google Inc. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#if UNITY_ANDROID

using UnityEngine;

/// @cond
namespace Gvr.Internal {
  public abstract class BaseAndroidDevice : BaseVRDevice {
    protected AndroidJavaObject androidActivity;

    public override void Destroy() {
      if (androidActivity != null) {
        androidActivity.Dispose();
        androidActivity = null;
      }
      base.Destroy();
    }

    protected virtual void ConnectToActivity() {
      try {
        using (AndroidJavaClass player = new AndroidJavaClass("com.unity3d.player.UnityPlayer")) {
          androidActivity = player.GetStatic<AndroidJavaObject>("currentActivity");
        }
      } catch (AndroidJavaException e) {
        androidActivity = null;
        Debug.LogError("Exception while connecting to the Activity: " + e);
      }
    }

    public static AndroidJavaClass GetClass(string className) {
      try {
        return new AndroidJavaClass(className);
      } catch (AndroidJavaException e) {
        Debug.LogError("Exception getting class " + className + ": " + e);
        return null;
      }
    }

    public static AndroidJavaObject Create(string className, params object[] args) {
      try {
        return new AndroidJavaObject(className, args);
      } catch (AndroidJavaException e) {
        Debug.LogError("Exception creating object " + className + ": " + e);
        return null;
      }
    }

    public static bool CallStaticMethod(AndroidJavaObject jo, string name, params object[] args) {
      if (jo == null) {
        Debug.LogError("Object is null when calling static method " + name);
        return false;
      }
      try {
        jo.CallStatic(name, args);
        return true;
      } catch (AndroidJavaException e) {
        Debug.LogError("Exception calling static method " + name + ": " + e);
        return false;
      }
    }

    public static bool CallObjectMethod(AndroidJavaObject jo, string name, params object[] args) {
      if (jo == null) {
        Debug.LogError("Object is null when calling method " + name);
        return false;
      }
      try {
        jo.Call(name, args);
        return true;
      } catch (AndroidJavaException e) {
        Debug.LogError("Exception calling method " + name + ": " + e);
        return false;
      }
    }

    public static bool CallStaticMethod<T>(ref T result, AndroidJavaObject jo, string name,
                                              params object[] args) {
      if (jo == null) {
        Debug.LogError("Object is null when calling static method " + name);
        return false;
      }
      try {
        result = jo.CallStatic<T>(name, args);
        return true;
      } catch (AndroidJavaException e) {
        Debug.LogError("Exception calling static method " + name + ": " + e);
        return false;
      }
    }

    public static bool CallObjectMethod<T>(ref T result, AndroidJavaObject jo, string name,
                                              params object[] args) {
      if (jo == null) {
        Debug.LogError("Object is null when calling method " + name);
        return false;
      }
      try {
        result = jo.Call<T>(name, args);
        return true;
      } catch (AndroidJavaException e) {
        Debug.LogError("Exception calling method " + name + ": " + e);
        return false;
      }
    }
  }
}
/// @endcond

#endif
