// 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
//
//     https://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;
using UnityEditor;
using UnityEditor.Build;
using PolyToolkit;

namespace PolyToolkitEditor {
class WarnIfManagerNotInScene : IProcessScene, IPostprocessBuild {
  bool sawManager;

  public int callbackOrder { get { return 0; } }

  public void OnProcessScene(UnityEngine.SceneManagement.Scene scene) {
    if (! sawManager) {
      if (scene.isLoaded) {
        foreach (var gameObject in scene.GetRootGameObjects()) {
          if (gameObject.GetComponentInChildren<PolyToolkitManager>() != null) {
            sawManager = true;
            break;
          }
        }
      }
    }
  }

  public void OnPostprocessBuild(BuildTarget target, string path) {
    if (! sawManager) {
      Debug.LogWarning("Please add a PolyToolkitManager component to your scene.");
    }
  }
}

}
