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

namespace Thousandto.DIY
{
    public class ChangeUILayerEditor : EditorWindow
    {
        [MenuItem("Ares/ChangeUILayerEditor")]
        static void Open()
        {
            if (Application.isPlaying)
            {
                return;
            }

            var win = (ChangeUILayerEditor)EditorWindow.GetWindow(typeof(ChangeUILayerEditor));
            win.Show();
        }

        private string _prefabPath = string.Empty;
        private string[] _layerNames = null;
        private int _orginLayer = 0;
        private int _targetLayer = 0;
        void OnGUI()
        {
            if(_layerNames == null)
            {
                var layerList = new List<string>();
                for (int i = 0; i < 32; ++i)
                {
                    var layerName = LayerMask.LayerToName(i);
                    if(!string.IsNullOrEmpty(layerName))
                    {
                        layerList.Add(layerName);
                    }
                }
                _layerNames = layerList.ToArray();
            }

            EditorGUILayout.BeginVertical();
            EditorGUILayout.LabelField("选择路径");
            EditorGUILayout.Space();
            EditorGUILayout.LabelField("需要修改层的Prefab路径");
            EditorGUILayout.BeginHorizontal();
            if (GUILayout.Button("浏览", GUILayout.Width(50)))
            {
                _prefabPath = EditorUtility.OpenFolderPanel("Change Layer Prefab Path", _prefabPath, "");
            }
            if (string.IsNullOrEmpty(_prefabPath))
            {
                EditorGUILayout.LabelField("null...");
            }
            else
            {
                EditorGUILayout.LabelField(_prefabPath);
            }
            EditorGUILayout.EndHorizontal();
            EditorGUILayout.EndVertical();

            EditorGUILayout.BeginVertical();
            EditorGUILayout.BeginHorizontal();
            EditorGUILayout.LabelField("原层");
            _orginLayer = EditorGUILayout.Popup(_orginLayer, _layerNames);
            EditorGUILayout.EndHorizontal();

            EditorGUILayout.BeginHorizontal();
            EditorGUILayout.LabelField("目标层");
            _targetLayer = EditorGUILayout.Popup(_targetLayer, _layerNames);
            EditorGUILayout.EndHorizontal();
            EditorGUILayout.EndVertical();

            if (GUILayout.Button("转换", GUILayout.Width(50)))
            {
                if(_orginLayer == _targetLayer)
                {
                    return;
                }

                if (string.IsNullOrEmpty(_prefabPath))
                    return;

                int oriLayer = LayerMask.NameToLayer(_layerNames[_orginLayer]);
                int targetLayer = LayerMask.NameToLayer(_layerNames[_targetLayer]);
                string originLayerText = string.Format("m_Layer: {0}", oriLayer);
                string targetLayerText = string.Format("m_Layer: {0}", targetLayer);
                if (Directory.Exists(_prefabPath))
                {
                    DirectoryInfo direction = new DirectoryInfo(_prefabPath);
                    FileInfo[] files = direction.GetFiles("*.prefab", SearchOption.AllDirectories);
                    for (int i = 0; i < files.Length; ++i)
                    {
                        var path = files[i].FullName;
                        var prefabText = File.ReadAllText(path);
                        prefabText = prefabText.Replace(originLayerText, targetLayerText);
                        File.WriteAllText(path, prefabText);
                    }
                }
            }
        }
    }
}