// Copyright 2017 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.

using UnityEngine;

/// @cond
namespace Gvr.Internal {
  /// Factory that provides a concrete implementation of IHeadsetProvider for the
  /// current platform.
  static class HeadsetProviderFactory {
    /// Provides a concrete implementation of IHeadsetProvider appropriate for the current
    /// platform. This method never returns null. In the worst case, it might return a dummy
    /// provider if the platform is not supported. For demo purposes the emulator controller
    /// is returned in the editor and in Unity Standalone (desktop) builds, for use inside the
    /// desktop player.
    static internal IHeadsetProvider CreateProvider() {
// Use emualtor in editor, GVR SDK support on Android standalone headsets, and a
// dummy implementation otherwise..
#if UNITY_EDITOR
      return new EditorHeadsetProvider();
#elif UNITY_ANDROID
      // Use the GVR C API.
      return new AndroidNativeHeadsetProvider();
#else
      // Platform not supported.
      Debug.LogWarning("No Google VR standalone headset / 6DOF support on " +
          Application.platform + " platform.");
      return new DummyHeadsetProvider();
#endif  // UNITY_EDITOR || UNITY_ANDROID
    }
  }
}
/// @endcond