using System;
using System.Collections.Generic;

using UnityEngine;
using UnityEngine.SceneManagement;

namespace Rokojori
{

public static class SceneExtensions
{
  public static T Get<T>( this Scene scene ) 
  {
    var roots = scene.GetRootGameObjects();

    for ( int i = 0; i < roots.Length; i++ )
    {
      var t = roots[ i ].GetComponentInChildren<T>();

      if ( t != null )
      {
        return t;
      }
    }

  	return default(T);
  }
    
  public static T GetInOpenScenes<T>()
  {
    var numScenes = SceneManager.sceneCount;

    for ( int i = 0; i < numScenes; i++ )
    {
      var scene = SceneManager.GetSceneAt( i );

      var obj = scene.Get<T>();

      if ( obj != null )
      {
        return obj;
      }
    }

    return default(T);
  }
}

}