using UnityEngine;
using UnityEditor;
using System.Collections.Generic;
using UnityEngine.SceneManagement;

namespace Dugan { 
	public class SelectGameObjectsWithMissingScripts : UnityEditor.Editor
	{
		[MenuItem("Tools/Dugan Utilities/Select GameObjects With Missing Scripts")]
		static void SelectGameObjects()
		{
			//Get the current scene and all top-level GameObjects in the scene hierarchy
			//UnityEngine.SceneManagement.Scene
			Scene currentScene = SceneManager.GetActiveScene();
			GameObject[] rootObjects = currentScene.GetRootGameObjects();

			
	
			List<Object> objectsWithDeadLinks = new List<Object>();
			foreach (GameObject g in rootObjects)
			{
				//Get all components on the GameObject, then loop through them 
				Component[] components = g.GetComponents<Component>();
				for (int i = 0; i < components.Length; i++)
				{
					Component currentComponent = components[i];
	
					//If the component is null, that means it's a missing script!
					if (currentComponent == null)
					{
						//Add the sinner to our naughty-list
						objectsWithDeadLinks.Add(g);
						Selection.activeGameObject = g;
						Debug.Log(g + " has a missing script!");
						break;
					}
				}
			}
			if (objectsWithDeadLinks.Count > 0)
			{
				//Set the selection in the editor
				Selection.objects = objectsWithDeadLinks.ToArray();
			}
			else
			{
				Debug.Log("No GameObjects in '" + currentScene.name + "' have missing scripts! Yay!");
			}
		}
	}
}