using UnityEngine;
using UnityEditor;
using System.Collections.Generic;
using UnityEngine.SceneManagement; //3
namespace XRLib
{
#if UNITY_EDITOR
    public class SelectGameObjectsWithMissingScripts : Editor
    {
        [MenuItem("Tools/WPAG Utilities/Select GameObjects With Missing Scripts")]
        static void SelectGameObjects()
        {
            //Get the current scene and all top-level GameObjects in the scene hierarchy
            Scene currentScene = UnityEngine.SceneManagement.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!");
            }
        }
    }
#endif
}