// Original FindMissingScriptsRecursively script by SimTex and Clement
// http://wiki.unity3d.com/index.php?title=FindMissingScripts

#if UNITY_EDITOR

using UnityEngine;
using UnityEditor;

namespace MoreMountains.Tools
{
	public class MMFindMissingScriptsRecursively : EditorWindow 
	{
	    static int go_count = 0, components_count = 0, missing_count = 0;
	 
	    [MenuItem("Window/FindMissingScriptsRecursively")]
	    public static void ShowWindow()
	    {
	        EditorWindow.GetWindow(typeof(MMFindMissingScriptsRecursively));
	    }
	 
		#if  UNITY_EDITOR
		public void OnGUI()
	    {
	        if (GUILayout.Button("Find Missing Scripts in selected GameObjects"))
	        {
	            FindInSelected();
	        }
	    }
		#endif
		
	    private static void FindInSelected()
	    {
	        GameObject[] go = Selection.gameObjects;
	        go_count = 0;
			components_count = 0;
			missing_count = 0;
	        foreach (GameObject g in go)
	        {
	   			FindInGO(g);
	        }
	        Debug.Log(string.Format("Searched {0} GameObjects, {1} components, found {2} missing", go_count, components_count, missing_count));
	    }
	 
	    private static void FindInGO(GameObject g)
	    {
	        go_count++;
	        Component[] components = g.GetComponents<Component>();
	        for (int i = 0; i < components.Length; i++)
	        {
	            components_count++;
	            if (components[i] == null)
	            {
	                missing_count++;
	                string s = g.name;
	                Transform t = g.transform;
	                while (t.parent != null) 
	                {
	                    s = t.parent.name +"/"+s;
	                    t = t.parent;
	                }
	                Debug.Log (s + " has an empty script attached in position: " + i, g);
	            }
	        }
	        // Now recurse through each child GO (if there are any):
	        foreach (Transform childT in g.transform)
	        {
	            FindInGO(childT.gameObject);
	        }
	    }
	}
}
#endif