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

public class FindMissingPrefabs : EditorWindow
{
    [MenuItem("Tools/Find Missing Prefabs")]
    static void Init()
    {
        GetWindow<FindMissingPrefabs>("Find Missing Prefabs").Show();
    }

    private List<GameObject> missingPrefabs = new List<GameObject>();

    void OnGUI()
    {
        if (GUILayout.Button("Find Missing Prefabs in Scene"))
        {
            FindMissing();
        }

        if (missingPrefabs.Count > 0)
        {
            GUILayout.Label("Missing Prefabs Found:", EditorStyles.boldLabel);
            foreach (var obj in missingPrefabs.Take(32))
            {
                if (GUILayout.Button(obj.name))
                {
                    Selection.activeGameObject = obj;
                }
            }
        }
        else
        {
            GUILayout.Label("No missing prefabs found.");
        }
    }

    void FindMissing()
    {
        missingPrefabs.Clear();
        GameObject[] allObjects = GameObject.FindObjectsOfType<GameObject>();

        foreach (GameObject obj in allObjects)
        {
            PrefabAssetType prefabType = PrefabUtility.GetPrefabAssetType(obj);
            if (prefabType == PrefabAssetType.MissingAsset)
            {
                missingPrefabs.Add(obj);
            }
        }
    }
}