using UnityEngine;

#if UNITY_EDITOR
using System;
using System.Collections.Generic;
using UnityEditor.Experimental.SceneManagement;
#endif

public sealed class PrefabInPrefabSwapper : MonoBehaviour {

#if UNITY_EDITOR
    [SerializableAttribute]
    public sealed class SwapInfo {
        [SerializeField]
        private string swapTargetName = default;
        public string SwapTargetName {
            get{ return swapTargetName; }
        }
        [SerializeField]
        private GameObject swapPrefab = default;
        public GameObject SwapPrefab {
            get{ return swapPrefab; }
        }
    }

    [SerializeField]
    private SwapInfo[] swapInfoArray = new SwapInfo[1];

    [ContextMenu("SwapPrefab")]
    private void SwapPrefab(){
        foreach(var info in swapInfoArray){
            if(info.SwapTargetName.Length <= 0) continue;
            if(info.SwapPrefab == null) continue;

            var swapList = new List<Transform>();
            transform.AllChildrens(t => {
                if(t.name.Contains(info.SwapTargetName)){
                    swapList.Add(t);
                }
            });
            foreach(var from in swapList){
                var to = (UnityEditor.PrefabUtility.InstantiatePrefab(info.SwapPrefab, PrefabStageUtility.GetCurrentPrefabStage().scene) as GameObject).transform;
                to.parent = from.parent;
                to.localPosition = from.localPosition;
                to.localRotation = from.localRotation;
                to.localScale = from.localScale;
                DestroyImmediate(from.gameObject);
            }
        }
    }
#endif
}