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

namespace Streamingle.Prop.Editor
{
    /// <summary>
    /// 개별 프리펩 표시용 데이터
    /// </summary>
    public class PrefabDisplayItem
    {
        public string prefabName;         // 프리펩 이름
        public string prefabPath;         // 프리펩 경로
        public string folderName;         // 폴더 이름
        public PropInfo parentProp;       // 부모 PropInfo 참조
        public string thumbnailPath;      // 썸네일 경로

        public string DisplayName => prefabName;
    }

    /// <summary>
    /// 프랍 브라우저 에디터 윈도우
    /// </summary>
    public class PropBrowserWindow : EditorWindow
    {
        private const string PROP_PATH = "Assets/ResourcesData/Prop";
        private const string DATABASE_PATH = "Assets/Resources/Settings/PropDatabase.asset";
        private const string THUMBNAIL_FOLDER = "Thumbnail";
        private const int THUMBNAIL_SIZE = 128;
        private const int THUMBNAIL_CAPTURE_SIZE = 256;
        private const int GRID_PADDING = 10;

        private PropDatabase _database;
        private List<PropInfo> _filteredProps;
        private List<PrefabDisplayItem> _displayItems;  // 개별 프리펩 표시용
        private Dictionary<string, Texture2D> _thumbnailCache = new Dictionary<string, Texture2D>();

        private Vector2 _scrollPosition;
        private string _searchFilter = "";
        private int _viewMode = 0; // 0: 그리드, 1: 리스트

        private static readonly string[] VIEW_MODE_OPTIONS = { "그리드", "리스트" };
        private static readonly Color SELECTED_COLOR = new Color(0.3f, 0.6f, 1f, 0.3f);
        private static readonly Color HOVER_COLOR = new Color(1f, 1f, 1f, 0.1f);

        [MenuItem("Streamingle/Prop Browser %#p")]
        public static void ShowWindow()
        {
            var window = GetWindow<PropBrowserWindow>("프랍 브라우저");
            window.minSize = new Vector2(400, 500);
            window.Show();
        }

        private void OnEnable()
        {
            LoadOrCreateDatabase();
        }

        private void OnDisable()
        {
            ClearThumbnailCache();
        }

        private void OnGUI()
        {
            DrawToolbar();
            DrawContent();
        }

        private void DrawToolbar()
        {
            EditorGUILayout.BeginHorizontal(EditorStyles.toolbar);

            // 새로고침 버튼
            if (GUILayout.Button("새로고침", EditorStyles.toolbarButton, GUILayout.Width(60)))
            {
                RefreshPropList();
            }

            GUILayout.Space(10);

            // 검색
            EditorGUILayout.LabelField("검색:", GUILayout.Width(35));
            string newSearch = EditorGUILayout.TextField(_searchFilter, EditorStyles.toolbarSearchField, GUILayout.Width(150));
            if (newSearch != _searchFilter)
            {
                _searchFilter = newSearch;
                ApplyFilter();
            }

            if (GUILayout.Button("X", EditorStyles.toolbarButton, GUILayout.Width(20)))
            {
                _searchFilter = "";
                ApplyFilter();
                GUI.FocusControl(null);
            }

            GUILayout.FlexibleSpace();

            // 뷰 모드
            _viewMode = GUILayout.Toolbar(_viewMode, VIEW_MODE_OPTIONS, EditorStyles.toolbarButton, GUILayout.Width(100));

            EditorGUILayout.EndHorizontal();

            // 정보 바
            EditorGUILayout.BeginHorizontal(EditorStyles.helpBox);
            int totalPrefabCount = _database?.props.Sum(p => Math.Max(1, p.prefabPaths.Count)) ?? 0;
            int filteredCount = _displayItems?.Count ?? 0;
            string countText = string.IsNullOrEmpty(_searchFilter)
                ? $"총 {totalPrefabCount}개 프리펩"
                : $"{filteredCount}/{totalPrefabCount}개 프리펩";
            EditorGUILayout.LabelField(countText);

            GUILayout.FlexibleSpace();

            // 썸네일 생성
            if (GUILayout.Button("썸네일 생성", GUILayout.Width(80)))
            {
                ShowThumbnailMenu();
            }

            // 웹 업로드
            if (GUILayout.Button("웹 업로드", GUILayout.Width(80)))
            {
                ShowWebUploadMenu();
            }

            // 폴더 열기
            if (GUILayout.Button("폴더", GUILayout.Width(40)))
            {
                EditorUtility.RevealInFinder(PROP_PATH);
            }

            EditorGUILayout.EndHorizontal();
        }

        private void ShowThumbnailMenu()
        {
            var menu = new GenericMenu();
            menu.AddItem(new GUIContent("모든 프리펩 썸네일 생성 (개별)"), false, () => GenerateAllPrefabThumbnails());
            menu.AddItem(new GUIContent("썸네일 없는 프리펩만 생성"), false, () => GenerateMissingPrefabThumbnails());
            menu.AddSeparator("");
            menu.AddItem(new GUIContent("폴더 단위로 생성 (기존 방식)/모든 폴더"), false, () => GenerateAllThumbnails());
            menu.AddItem(new GUIContent("폴더 단위로 생성 (기존 방식)/선택한 폴더"), false, () => GenerateThumbnailsForSelected());
            menu.ShowAsContext();
        }

        private void DrawContent()
        {
            if (_database == null || _displayItems == null)
            {
                EditorGUILayout.HelpBox("데이터베이스를 로드할 수 없습니다. 새로고침을 눌러주세요.", MessageType.Warning);
                return;
            }

            if (_displayItems.Count == 0)
            {
                EditorGUILayout.HelpBox("프리펩이 없습니다.", MessageType.Info);
                return;
            }

            _scrollPosition = EditorGUILayout.BeginScrollView(_scrollPosition);

            if (_viewMode == 0)
            {
                DrawGridView();
            }
            else
            {
                DrawListView();
            }

            EditorGUILayout.EndScrollView();
        }

        private void DrawGridView()
        {
            float windowWidth = position.width - 30;
            float itemWidth = THUMBNAIL_SIZE + GRID_PADDING;
            float itemHeight = THUMBNAIL_SIZE + 40; // 폴더명 표시를 위해 높이 증가
            int columnsCount = Mathf.Max(1, (int)(windowWidth / itemWidth));

            int rowCount = Mathf.CeilToInt((float)_displayItems.Count / columnsCount);
            float gridHeight = rowCount * itemHeight;

            Rect gridRect = GUILayoutUtility.GetRect(windowWidth, gridHeight);
            gridRect.x += GRID_PADDING;

            for (int i = 0; i < _displayItems.Count; i++)
            {
                int row = i / columnsCount;
                int col = i % columnsCount;

                Rect itemRect = new Rect(
                    gridRect.x + col * itemWidth,
                    gridRect.y + row * itemHeight,
                    THUMBNAIL_SIZE,
                    itemHeight
                );

                DrawGridItem(_displayItems[i], itemRect);
            }
        }

        private void DrawGridItem(PrefabDisplayItem item, Rect rect)
        {
            // 호버 효과
            if (rect.Contains(Event.current.mousePosition))
            {
                EditorGUI.DrawRect(rect, HOVER_COLOR);
                Repaint();
            }

            // 썸네일
            var thumbnailRect = new Rect(rect.x + 2, rect.y + 2, THUMBNAIL_SIZE - 4, THUMBNAIL_SIZE - 4);
            var thumbnail = GetThumbnailForItem(item);

            if (thumbnail != null)
            {
                GUI.DrawTexture(thumbnailRect, thumbnail, ScaleMode.ScaleToFit);
            }
            else
            {
                EditorGUI.DrawRect(thumbnailRect, new Color(0.2f, 0.2f, 0.2f));

                // 프리펩 미리보기
                if (!string.IsNullOrEmpty(item.prefabPath))
                {
                    var prefab = AssetDatabase.LoadAssetAtPath<GameObject>(item.prefabPath);
                    if (prefab != null)
                    {
                        var preview = AssetPreview.GetAssetPreview(prefab);
                        if (preview != null)
                        {
                            GUI.DrawTexture(thumbnailRect, preview, ScaleMode.ScaleToFit);
                        }
                        else
                        {
                            AssetPreview.SetPreviewTextureCacheSize(256);
                            GUI.Label(thumbnailRect, "Loading...", new GUIStyle(EditorStyles.centeredGreyMiniLabel) { alignment = TextAnchor.MiddleCenter });
                        }
                    }
                }
                else
                {
                    GUI.Label(thumbnailRect, "No\nPrefab", new GUIStyle(EditorStyles.centeredGreyMiniLabel) { wordWrap = true, alignment = TextAnchor.MiddleCenter });
                }
            }

            // 폴더 이름 배지 (프리펩 이름과 다를 경우)
            if (!string.IsNullOrEmpty(item.folderName) && item.folderName != item.prefabName)
            {
                var folderBadgeRect = new Rect(rect.x + 4, rect.y + THUMBNAIL_SIZE - 18, THUMBNAIL_SIZE - 8, 14);
                EditorGUI.DrawRect(folderBadgeRect, new Color(0, 0, 0, 0.7f));
                GUI.Label(folderBadgeRect, item.folderName, new GUIStyle(EditorStyles.miniLabel) {
                    alignment = TextAnchor.MiddleCenter,
                    normal = { textColor = new Color(1, 1, 1, 0.9f) },
                    fontSize = 9,
                    clipping = TextClipping.Clip
                });
            }

            // 프리펩 이름
            var labelRect = new Rect(rect.x, rect.y + THUMBNAIL_SIZE, THUMBNAIL_SIZE, 35);
            GUI.Label(labelRect, item.prefabName, new GUIStyle(EditorStyles.miniLabel) {
                alignment = TextAnchor.UpperCenter,
                wordWrap = true,
                clipping = TextClipping.Clip
            });

            // 클릭 이벤트
            if (Event.current.type == EventType.MouseDown && rect.Contains(Event.current.mousePosition))
            {
                if (Event.current.clickCount == 2)
                {
                    // 더블클릭: 프리펩 선택
                    SelectPrefabInProject(item);
                }
                else if (Event.current.button == 0)
                {
                    // 싱글클릭: 드래그 시작
                    HandleDragStartForItem(item);
                }
                else if (Event.current.button == 1)
                {
                    // 우클릭: 컨텍스트 메뉴
                    ShowContextMenuForItem(item);
                }
                Event.current.Use();
            }
        }

        private void DrawListView()
        {
            foreach (var item in _displayItems)
            {
                DrawListItem(item);
            }
        }

        private void DrawListItem(PrefabDisplayItem item)
        {
            EditorGUILayout.BeginHorizontal(EditorStyles.helpBox);

            // 썸네일 (작게)
            var thumbnail = GetThumbnailForItem(item);
            var thumbRect = GUILayoutUtility.GetRect(50, 50, GUILayout.Width(50), GUILayout.Height(50));

            if (thumbnail != null)
            {
                GUI.DrawTexture(thumbRect, thumbnail, ScaleMode.ScaleToFit);
            }
            else
            {
                EditorGUI.DrawRect(thumbRect, new Color(0.2f, 0.2f, 0.2f));

                // 프리펩 미리보기
                if (!string.IsNullOrEmpty(item.prefabPath))
                {
                    var prefab = AssetDatabase.LoadAssetAtPath<GameObject>(item.prefabPath);
                    if (prefab != null)
                    {
                        var preview = AssetPreview.GetAssetPreview(prefab);
                        if (preview != null)
                        {
                            GUI.DrawTexture(thumbRect, preview, ScaleMode.ScaleToFit);
                        }
                    }
                }
            }

            GUILayout.Space(10);

            // 프리펩 정보
            EditorGUILayout.BeginVertical();

            EditorGUILayout.LabelField(item.prefabName, EditorStyles.boldLabel);

            // 폴더 이름 (다르면 표시)
            if (!string.IsNullOrEmpty(item.folderName) && item.folderName != item.prefabName)
            {
                EditorGUILayout.LabelField($"폴더: {item.folderName}", EditorStyles.miniLabel);
            }

            EditorGUILayout.EndVertical();

            GUILayout.FlexibleSpace();

            // 버튼들
            EditorGUILayout.BeginVertical();

            if (GUILayout.Button("선택", GUILayout.Width(50)))
            {
                SelectPrefabInProject(item);
            }

            if (GUILayout.Button("...", GUILayout.Width(50)))
            {
                ShowContextMenuForItem(item);
            }

            EditorGUILayout.EndVertical();

            EditorGUILayout.EndHorizontal();

            // 드래그 처리
            var lastRect = GUILayoutUtility.GetLastRect();
            if (Event.current.type == EventType.MouseDown && lastRect.Contains(Event.current.mousePosition))
            {
                if (Event.current.button == 0)
                {
                    HandleDragStartForItem(item);
                }
            }
        }

        private void HandleDragStart(PropInfo propInfo)
        {
            if (propInfo.prefabPaths.Count == 0) return;

            var prefab = AssetDatabase.LoadAssetAtPath<GameObject>(propInfo.MainPrefabPath);
            if (prefab == null) return;

            DragAndDrop.PrepareStartDrag();
            DragAndDrop.objectReferences = new UnityEngine.Object[] { prefab };
            DragAndDrop.paths = new string[] { propInfo.MainPrefabPath };
            DragAndDrop.StartDrag(propInfo.propName);
        }

        private void HandleDragStartForItem(PrefabDisplayItem item)
        {
            if (string.IsNullOrEmpty(item.prefabPath)) return;

            var prefab = AssetDatabase.LoadAssetAtPath<GameObject>(item.prefabPath);
            if (prefab == null) return;

            DragAndDrop.PrepareStartDrag();
            DragAndDrop.objectReferences = new UnityEngine.Object[] { prefab };
            DragAndDrop.paths = new string[] { item.prefabPath };
            DragAndDrop.StartDrag(item.prefabName);
        }

        private void SelectPrefabInProject(PrefabDisplayItem item)
        {
            if (!string.IsNullOrEmpty(item.prefabPath))
            {
                var prefab = AssetDatabase.LoadAssetAtPath<GameObject>(item.prefabPath);
                if (prefab != null)
                {
                    Selection.activeObject = prefab;
                    EditorGUIUtility.PingObject(prefab);
                    return;
                }
            }

            // 프리펩이 없으면 폴더 선택
            if (item.parentProp != null)
            {
                var folder = AssetDatabase.LoadAssetAtPath<UnityEngine.Object>(item.parentProp.folderPath);
                if (folder != null)
                {
                    Selection.activeObject = folder;
                    EditorGUIUtility.PingObject(folder);
                }
            }
        }

        private void ShowContextMenuForItem(PrefabDisplayItem item)
        {
            var menu = new GenericMenu();

            menu.AddItem(new GUIContent("프로젝트에서 선택"), false, () => SelectPrefabInProject(item));

            if (item.parentProp != null)
            {
                menu.AddItem(new GUIContent("폴더 열기"), false, () => RevealInFinder(item.parentProp));
            }

            menu.AddSeparator("");

            menu.AddItem(new GUIContent("씬에 배치"), false, () => InstantiatePrefabFromItem(item));

            menu.AddSeparator("");

            menu.AddItem(new GUIContent("이 프리펩 썸네일 생성"), false, () => GenerateThumbnailForItem(item));

            menu.ShowAsContext();
        }

        private void InstantiatePrefabFromItem(PrefabDisplayItem item)
        {
            if (string.IsNullOrEmpty(item.prefabPath))
            {
                EditorUtility.DisplayDialog("오류", "프리펩이 없습니다.", "확인");
                return;
            }

            var prefab = AssetDatabase.LoadAssetAtPath<GameObject>(item.prefabPath);
            if (prefab == null)
            {
                EditorUtility.DisplayDialog("오류", "프리펩을 로드할 수 없습니다.", "확인");
                return;
            }

            var instance = PrefabUtility.InstantiatePrefab(prefab) as GameObject;
            if (instance != null)
            {
                if (SceneView.lastActiveSceneView != null)
                {
                    instance.transform.position = SceneView.lastActiveSceneView.pivot;
                }

                Selection.activeGameObject = instance;
                Undo.RegisterCreatedObjectUndo(instance, "Instantiate Prop");
            }
        }

        private Texture2D GetThumbnailForItem(PrefabDisplayItem item)
        {
            if (string.IsNullOrEmpty(item.thumbnailPath))
                return null;

            if (_thumbnailCache.TryGetValue(item.thumbnailPath, out var cached))
                return cached;

            var texture = AssetDatabase.LoadAssetAtPath<Texture2D>(item.thumbnailPath);
            if (texture != null)
            {
                _thumbnailCache[item.thumbnailPath] = texture;
            }

            return texture;
        }

        private void ShowContextMenu(PropInfo propInfo)
        {
            var menu = new GenericMenu();

            menu.AddItem(new GUIContent("프로젝트에서 선택"), false, () => SelectPropInProject(propInfo));
            menu.AddItem(new GUIContent("폴더 열기"), false, () => RevealInFinder(propInfo));

            menu.AddSeparator("");

            // 프리펩 목록
            if (propInfo.prefabPaths.Count > 0)
            {
                foreach (var prefabPath in propInfo.prefabPaths)
                {
                    string prefabName = Path.GetFileNameWithoutExtension(prefabPath);
                    menu.AddItem(new GUIContent($"프리펩/{prefabName}"), false, () =>
                    {
                        var prefab = AssetDatabase.LoadAssetAtPath<GameObject>(prefabPath);
                        if (prefab != null)
                        {
                            Selection.activeObject = prefab;
                            EditorGUIUtility.PingObject(prefab);
                        }
                    });
                }
            }
            else
            {
                menu.AddDisabledItem(new GUIContent("프리펩 없음"));
            }

            menu.AddSeparator("");

            // 모델 목록
            if (propInfo.modelPaths.Count > 0)
            {
                foreach (var modelPath in propInfo.modelPaths)
                {
                    string modelName = Path.GetFileName(modelPath);
                    menu.AddItem(new GUIContent($"모델/{modelName}"), false, () =>
                    {
                        var model = AssetDatabase.LoadAssetAtPath<UnityEngine.Object>(modelPath);
                        if (model != null)
                        {
                            Selection.activeObject = model;
                            EditorGUIUtility.PingObject(model);
                        }
                    });
                }
            }

            menu.AddSeparator("");

            menu.AddItem(new GUIContent("씬에 배치"), false, () => InstantiatePrefab(propInfo));

            menu.AddSeparator("");

            menu.AddItem(new GUIContent("썸네일 생성"), false, () => GenerateThumbnail(propInfo));

            menu.ShowAsContext();
        }

        private void SelectPropInProject(PropInfo propInfo)
        {
            if (propInfo.prefabPaths.Count > 0)
            {
                var prefab = AssetDatabase.LoadAssetAtPath<GameObject>(propInfo.MainPrefabPath);
                if (prefab != null)
                {
                    Selection.activeObject = prefab;
                    EditorGUIUtility.PingObject(prefab);
                    return;
                }
            }

            // 프리펩이 없으면 폴더 선택
            var folder = AssetDatabase.LoadAssetAtPath<UnityEngine.Object>(propInfo.folderPath);
            if (folder != null)
            {
                Selection.activeObject = folder;
                EditorGUIUtility.PingObject(folder);
            }
        }

        private void RevealInFinder(PropInfo propInfo)
        {
            EditorUtility.RevealInFinder(propInfo.folderPath);
        }

        private void InstantiatePrefab(PropInfo propInfo)
        {
            if (propInfo.prefabPaths.Count == 0)
            {
                EditorUtility.DisplayDialog("오류", "프리펩이 없습니다.", "확인");
                return;
            }

            var prefab = AssetDatabase.LoadAssetAtPath<GameObject>(propInfo.MainPrefabPath);
            if (prefab == null)
            {
                EditorUtility.DisplayDialog("오류", "프리펩을 로드할 수 없습니다.", "확인");
                return;
            }

            var instance = PrefabUtility.InstantiatePrefab(prefab) as GameObject;
            if (instance != null)
            {
                // 씬 뷰 중앙에 배치
                if (SceneView.lastActiveSceneView != null)
                {
                    instance.transform.position = SceneView.lastActiveSceneView.pivot;
                }

                Selection.activeGameObject = instance;
                Undo.RegisterCreatedObjectUndo(instance, "Instantiate Prop");
            }
        }

        private Texture2D GetThumbnail(PropInfo propInfo)
        {
            if (string.IsNullOrEmpty(propInfo.thumbnailPath))
                return null;

            if (_thumbnailCache.TryGetValue(propInfo.thumbnailPath, out var cached))
                return cached;

            var texture = AssetDatabase.LoadAssetAtPath<Texture2D>(propInfo.thumbnailPath);
            if (texture != null)
            {
                _thumbnailCache[propInfo.thumbnailPath] = texture;
            }

            return texture;
        }

        private void ClearThumbnailCache()
        {
            _thumbnailCache.Clear();
        }

        private void LoadOrCreateDatabase()
        {
            _database = AssetDatabase.LoadAssetAtPath<PropDatabase>(DATABASE_PATH);

            if (_database == null)
            {
                // 폴더 생성
                if (!AssetDatabase.IsValidFolder("Assets/Resources"))
                    AssetDatabase.CreateFolder("Assets", "Resources");
                if (!AssetDatabase.IsValidFolder("Assets/Resources/Settings"))
                    AssetDatabase.CreateFolder("Assets/Resources", "Settings");

                _database = CreateInstance<PropDatabase>();
                AssetDatabase.CreateAsset(_database, DATABASE_PATH);
                AssetDatabase.SaveAssets();
            }

            RefreshPropList();
        }

        private void RefreshPropList()
        {
            if (_database == null) return;

            _database.props.Clear();

            if (!Directory.Exists(PROP_PATH))
            {
                UnityEngine.Debug.LogWarning($"Prop 폴더가 없습니다: {PROP_PATH}");
                ApplyFilter();
                return;
            }

            // Prop 하위 폴더들 검색 (Glb, Prop Prefab 제외)
            var propFolders = Directory.GetDirectories(PROP_PATH)
                .Where(f => !f.EndsWith("Glb") && !f.EndsWith("Prop Prefab"))
                .ToList();

            foreach (var folderPath in propFolders)
            {
                string propName = Path.GetFileName(folderPath);
                string assetPath = folderPath.Replace("\\", "/");

                // Assets/ 형식으로 변환
                int assetsIndex = assetPath.IndexOf("Assets/");
                if (assetsIndex >= 0)
                {
                    assetPath = assetPath.Substring(assetsIndex);
                }

                var propInfo = new PropInfo
                {
                    propName = propName,
                    folderPath = assetPath
                };

                // 파일 스캔
                ScanPropFiles(propInfo, folderPath);

                _database.props.Add(propInfo);
            }

            // 이름순 정렬
            _database.props = _database.props.OrderBy(p => p.propName).ToList();

            EditorUtility.SetDirty(_database);
            AssetDatabase.SaveAssets();

            ApplyFilter();

            UnityEngine.Debug.Log($"[PropBrowser] {_database.props.Count}개 프랍 스캔 완료");
        }

        private void ScanPropFiles(PropInfo propInfo, string folderPath)
        {
            var allFiles = Directory.GetFiles(folderPath, "*.*", SearchOption.AllDirectories)
                .Where(f => !f.EndsWith(".meta"))
                .ToList();

            foreach (var file in allFiles)
            {
                string ext = Path.GetExtension(file).ToLower();
                string assetPath = file.Replace("\\", "/");

                int assetsIndex = assetPath.IndexOf("Assets/");
                if (assetsIndex >= 0)
                {
                    assetPath = assetPath.Substring(assetsIndex);
                }

                if (ext == ".prefab")
                {
                    propInfo.prefabPaths.Add(assetPath);
                }
                else if (ext == ".glb" || ext == ".fbx" || ext == ".obj")
                {
                    propInfo.modelPaths.Add(assetPath);
                }
                else if (ext == ".png" || ext == ".jpg" || ext == ".jpeg" || ext == ".tga" || ext == ".psd")
                {
                    propInfo.textureCount++;

                    // 썸네일 찾기 (thumbnail 또는 _thumb 포함)
                    string fileName = Path.GetFileNameWithoutExtension(file).ToLower();
                    if (fileName.Contains("thumbnail") || fileName.Contains("_thumb"))
                    {
                        propInfo.thumbnailPath = assetPath;
                    }
                }
                else if (ext == ".mat")
                {
                    propInfo.materialCount++;
                }
            }

            // 프리펩 이름순 정렬
            propInfo.prefabPaths = propInfo.prefabPaths.OrderBy(p => Path.GetFileName(p)).ToList();
        }

        private void ApplyFilter()
        {
            if (_database == null)
            {
                _filteredProps = new List<PropInfo>();
                _displayItems = new List<PrefabDisplayItem>();
                return;
            }

            // 기존 필터링
            if (string.IsNullOrEmpty(_searchFilter))
            {
                _filteredProps = new List<PropInfo>(_database.props);
            }
            else
            {
                string filter = _searchFilter.ToLower();
                _filteredProps = _database.props
                    .Where(p => p.propName.ToLower().Contains(filter) ||
                               p.prefabPaths.Any(pp => Path.GetFileNameWithoutExtension(pp).ToLower().Contains(filter)))
                    .ToList();
            }

            // 개별 프리펩 단위로 표시 아이템 생성
            _displayItems = new List<PrefabDisplayItem>();

            foreach (var prop in _filteredProps)
            {
                if (prop.prefabPaths.Count > 0)
                {
                    // 각 프리펩을 개별 아이템으로 추가
                    foreach (var prefabPath in prop.prefabPaths)
                    {
                        string prefabName = Path.GetFileNameWithoutExtension(prefabPath);

                        // 검색 필터 추가 적용
                        if (!string.IsNullOrEmpty(_searchFilter))
                        {
                            string filter = _searchFilter.ToLower();
                            if (!prefabName.ToLower().Contains(filter) && !prop.propName.ToLower().Contains(filter))
                                continue;
                        }

                        // 개별 프리펩 썸네일 경로 찾기
                        string prefabThumbnailPath = $"{prop.folderPath}/{THUMBNAIL_FOLDER}/{prefabName}_thumbnail.png";
                        string prefabThumbnailFullPath = prefabThumbnailPath.Replace("Assets/", Application.dataPath + "/");

                        // 개별 썸네일이 없으면 폴더 썸네일 사용
                        string thumbnailToUse = File.Exists(prefabThumbnailFullPath) ? prefabThumbnailPath : prop.thumbnailPath;

                        _displayItems.Add(new PrefabDisplayItem
                        {
                            prefabName = prefabName,
                            prefabPath = prefabPath,
                            folderName = prop.propName,
                            parentProp = prop,
                            thumbnailPath = thumbnailToUse
                        });
                    }
                }
                else
                {
                    // 프리펩이 없는 폴더도 표시
                    _displayItems.Add(new PrefabDisplayItem
                    {
                        prefabName = prop.propName,
                        prefabPath = null,
                        folderName = prop.propName,
                        parentProp = prop,
                        thumbnailPath = prop.thumbnailPath
                    });
                }
            }

            // 이름순 정렬
            _displayItems = _displayItems.OrderBy(d => d.prefabName).ToList();
        }

        #region Thumbnail Generation

        /// <summary>
        /// 개별 프리펩에 대한 썸네일 생성
        /// </summary>
        private bool GenerateThumbnailForItem(PrefabDisplayItem item)
        {
            if (string.IsNullOrEmpty(item.prefabPath) || item.parentProp == null)
            {
                UnityEngine.Debug.LogWarning($"[PropBrowser] {item.prefabName}: 프리펩 경로가 없습니다.");
                return false;
            }

            var prefab = AssetDatabase.LoadAssetAtPath<GameObject>(item.prefabPath);
            if (prefab == null)
            {
                UnityEngine.Debug.LogWarning($"[PropBrowser] {item.prefabName}: 프리펩을 로드할 수 없습니다.");
                return false;
            }

            // 썸네일 폴더 경로
            string thumbnailFolderPath = $"{item.parentProp.folderPath}/{THUMBNAIL_FOLDER}";
            string thumbnailFileName = $"{item.prefabName}_thumbnail.png";
            string thumbnailPath = $"{thumbnailFolderPath}/{thumbnailFileName}";

            // 폴더 생성
            if (!AssetDatabase.IsValidFolder(thumbnailFolderPath))
            {
                AssetDatabase.CreateFolder(item.parentProp.folderPath, THUMBNAIL_FOLDER);
            }

            var previewTexture = GeneratePreviewTexture(prefab);
            if (previewTexture == null)
            {
                UnityEngine.Debug.LogWarning($"[PropBrowser] {item.prefabName}: 미리보기를 생성할 수 없습니다.");
                return false;
            }

            try
            {
                byte[] pngData = previewTexture.EncodeToPNG();
                string fullPath = thumbnailPath.Replace("Assets/", Application.dataPath + "/");

                string directory = Path.GetDirectoryName(fullPath);
                if (!Directory.Exists(directory))
                {
                    Directory.CreateDirectory(directory);
                }

                File.WriteAllBytes(fullPath, pngData);
                DestroyImmediate(previewTexture);

                AssetDatabase.ImportAsset(thumbnailPath);

                // item의 썸네일 경로 업데이트
                item.thumbnailPath = thumbnailPath;

                UnityEngine.Debug.Log($"[PropBrowser] {item.prefabName}: 썸네일 생성 완료");
                return true;
            }
            catch (Exception ex)
            {
                UnityEngine.Debug.LogError($"[PropBrowser] {item.prefabName}: 썸네일 저장 실패 - {ex.Message}");
                return false;
            }
        }

        /// <summary>
        /// 모든 프리펩에 대해 개별 썸네일 생성
        /// </summary>
        private void GenerateAllPrefabThumbnails()
        {
            // 모든 프리펩 아이템 수집 (필터 없이)
            var allItems = new List<PrefabDisplayItem>();
            foreach (var prop in _database.props)
            {
                foreach (var prefabPath in prop.prefabPaths)
                {
                    allItems.Add(new PrefabDisplayItem
                    {
                        prefabName = Path.GetFileNameWithoutExtension(prefabPath),
                        prefabPath = prefabPath,
                        folderName = prop.propName,
                        parentProp = prop
                    });
                }
            }

            if (allItems.Count == 0)
            {
                EditorUtility.DisplayDialog("알림", "생성할 프리펩이 없습니다.", "확인");
                return;
            }

            if (!EditorUtility.DisplayDialog("확인",
                $"모든 프리펩 ({allItems.Count}개)의 썸네일을 개별 생성합니다.\n계속하시겠습니까?",
                "생성", "취소"))
            {
                return;
            }

            GeneratePrefabThumbnails(allItems, "모든 프리펩");
        }

        /// <summary>
        /// 썸네일이 없는 프리펩만 개별 썸네일 생성
        /// </summary>
        private void GenerateMissingPrefabThumbnails()
        {
            var itemsWithoutThumbnail = new List<PrefabDisplayItem>();

            foreach (var prop in _database.props)
            {
                foreach (var prefabPath in prop.prefabPaths)
                {
                    string prefabName = Path.GetFileNameWithoutExtension(prefabPath);
                    string expectedThumbnailPath = $"{prop.folderPath}/{THUMBNAIL_FOLDER}/{prefabName}_thumbnail.png";
                    string fullPath = expectedThumbnailPath.Replace("Assets/", Application.dataPath + "/");

                    if (!File.Exists(fullPath))
                    {
                        itemsWithoutThumbnail.Add(new PrefabDisplayItem
                        {
                            prefabName = prefabName,
                            prefabPath = prefabPath,
                            folderName = prop.propName,
                            parentProp = prop
                        });
                    }
                }
            }

            if (itemsWithoutThumbnail.Count == 0)
            {
                EditorUtility.DisplayDialog("알림", "모든 프리펩에 썸네일이 있습니다.", "확인");
                return;
            }

            GeneratePrefabThumbnails(itemsWithoutThumbnail, $"썸네일 없는 {itemsWithoutThumbnail.Count}개 프리펩");
        }

        /// <summary>
        /// PrefabDisplayItem 리스트에 대해 썸네일 일괄 생성
        /// </summary>
        private void GeneratePrefabThumbnails(List<PrefabDisplayItem> items, string description)
        {
            int successCount = 0;
            int failCount = 0;

            try
            {
                for (int i = 0; i < items.Count; i++)
                {
                    var item = items[i];

                    EditorUtility.DisplayProgressBar("썸네일 생성 중",
                        $"{item.prefabName} ({i + 1}/{items.Count})",
                        (float)i / items.Count);

                    if (GenerateThumbnailForItem(item))
                    {
                        successCount++;
                    }
                    else
                    {
                        failCount++;
                    }
                }
            }
            finally
            {
                EditorUtility.ClearProgressBar();
            }

            AssetDatabase.SaveAssets();
            AssetDatabase.Refresh();

            ClearThumbnailCache();
            ApplyFilter();  // displayItems 다시 생성하여 썸네일 경로 반영
            Repaint();

            EditorUtility.DisplayDialog("완료",
                $"{description} 썸네일 생성 완료\n성공: {successCount}개\n실패: {failCount}개",
                "확인");
        }

        private void GenerateThumbnailsForSelected()
        {
            // 현재 선택된 프랍 (Selection에서)
            var selectedObjects = Selection.objects;
            var propsToGenerate = new List<PropInfo>();

            foreach (var obj in selectedObjects)
            {
                string path = AssetDatabase.GetAssetPath(obj);
                if (string.IsNullOrEmpty(path)) continue;

                var prop = _database.props.Find(p => path.StartsWith(p.folderPath));
                if (prop != null && !propsToGenerate.Contains(prop))
                {
                    propsToGenerate.Add(prop);
                }
            }

            if (propsToGenerate.Count == 0)
            {
                EditorUtility.DisplayDialog("알림", "선택된 프랍이 없습니다.\n프로젝트 창에서 프랍 폴더나 프리펩을 선택해주세요.", "확인");
                return;
            }

            GenerateThumbnails(propsToGenerate, $"선택한 {propsToGenerate.Count}개 프랍");
        }

        private void GenerateAllThumbnails()
        {
            if (!EditorUtility.DisplayDialog("확인",
                $"모든 프랍 ({_database.props.Count}개)의 썸네일을 생성합니다.\n계속하시겠습니까?",
                "생성", "취소"))
            {
                return;
            }

            GenerateThumbnails(_database.props, "모든 프랍");
        }

        private void GenerateMissingThumbnails()
        {
            var propsWithoutThumbnail = _database.props
                .Where(p => string.IsNullOrEmpty(p.thumbnailPath) ||
                           !File.Exists(p.thumbnailPath.Replace("Assets/", Application.dataPath + "/")))
                .ToList();

            if (propsWithoutThumbnail.Count == 0)
            {
                EditorUtility.DisplayDialog("알림", "모든 프랍에 썸네일이 있습니다.", "확인");
                return;
            }

            GenerateThumbnails(propsWithoutThumbnail, $"썸네일 없는 {propsWithoutThumbnail.Count}개 프랍");
        }

        private void GenerateThumbnails(List<PropInfo> props, string description)
        {
            int successCount = 0;
            int failCount = 0;

            try
            {
                for (int i = 0; i < props.Count; i++)
                {
                    var prop = props[i];

                    EditorUtility.DisplayProgressBar("썸네일 생성 중",
                        $"{prop.propName} ({i + 1}/{props.Count})",
                        (float)i / props.Count);

                    if (GenerateThumbnail(prop))
                    {
                        successCount++;
                    }
                    else
                    {
                        failCount++;
                    }
                }
            }
            finally
            {
                EditorUtility.ClearProgressBar();
            }

            EditorUtility.SetDirty(_database);
            AssetDatabase.SaveAssets();
            AssetDatabase.Refresh();

            ClearThumbnailCache();
            Repaint();

            EditorUtility.DisplayDialog("완료",
                $"{description} 썸네일 생성 완료\n성공: {successCount}개\n실패: {failCount}개",
                "확인");
        }

        private bool GenerateThumbnail(PropInfo propInfo)
        {
            if (propInfo.prefabPaths.Count == 0)
            {
                UnityEngine.Debug.LogWarning($"[PropBrowser] {propInfo.propName}: 프리펩이 없어 썸네일을 생성할 수 없습니다.");
                return false;
            }

            // 프리펩 로드
            var prefab = AssetDatabase.LoadAssetAtPath<GameObject>(propInfo.MainPrefabPath);
            if (prefab == null)
            {
                UnityEngine.Debug.LogWarning($"[PropBrowser] {propInfo.propName}: 프리펩을 로드할 수 없습니다.");
                return false;
            }

            // 썸네일 폴더 경로
            string thumbnailFolderPath = $"{propInfo.folderPath}/{THUMBNAIL_FOLDER}";
            string thumbnailFileName = $"{propInfo.propName}_thumbnail.png";
            string thumbnailPath = $"{thumbnailFolderPath}/{thumbnailFileName}";

            // 폴더 생성
            if (!AssetDatabase.IsValidFolder(thumbnailFolderPath))
            {
                AssetDatabase.CreateFolder(propInfo.folderPath, THUMBNAIL_FOLDER);
            }

            // 씬에서 직접 렌더링하여 썸네일 생성 (씬 조명 활용)
            var previewTexture = GeneratePreviewTexture(prefab);

            if (previewTexture == null)
            {
                UnityEngine.Debug.LogWarning($"[PropBrowser] {propInfo.propName}: 미리보기를 생성할 수 없습니다.");
                return false;
            }

            // 텍스처 저장
            try
            {
                // PNG로 저장
                byte[] pngData = previewTexture.EncodeToPNG();
                string fullPath = thumbnailPath.Replace("Assets/", Application.dataPath + "/");

                string directory = Path.GetDirectoryName(fullPath);
                if (!Directory.Exists(directory))
                {
                    Directory.CreateDirectory(directory);
                }

                File.WriteAllBytes(fullPath, pngData);

                DestroyImmediate(previewTexture);

                // 에셋 임포트
                AssetDatabase.ImportAsset(thumbnailPath);

                // PropInfo 업데이트
                propInfo.thumbnailPath = thumbnailPath;

                UnityEngine.Debug.Log($"[PropBrowser] {propInfo.propName}: 썸네일 생성 완료");
                return true;
            }
            catch (Exception ex)
            {
                UnityEngine.Debug.LogError($"[PropBrowser] {propInfo.propName}: 썸네일 저장 실패 - {ex.Message}");
                return false;
            }
        }

        private Texture2D GeneratePreviewTexture(GameObject prefab)
        {
            // 씬에서 프리펩을 소환하여 씬 조명을 활용
            var tempInstance = PrefabUtility.InstantiatePrefab(prefab) as GameObject;
            if (tempInstance == null)
            {
                tempInstance = Instantiate(prefab);
            }

            // 썸네일 촬영용 임시 위치 설정 (씬 외곽)
            Vector3 capturePosition = new Vector3(10000f, 10000f, 10000f);
            tempInstance.transform.position = capturePosition;
            tempInstance.name = "[ThumbnailCapture_Temp]";

            try
            {
                // 바운드 계산 - 모든 렌더러 포함
                Bounds bounds = CalculateTotalBounds(tempInstance);
                if (bounds.size == Vector3.zero)
                {
                    DestroyImmediate(tempInstance);
                    return null;
                }

                // 카메라 설정
                var cameraGo = new GameObject("[ThumbnailCamera_Temp]");
                var camera = cameraGo.AddComponent<Camera>();
                camera.backgroundColor = new Color(0.15f, 0.15f, 0.15f, 0f);
                camera.clearFlags = CameraClearFlags.SolidColor;
                camera.orthographic = false;
                camera.fieldOfView = 30f; // 좁은 FOV로 왜곡 최소화
                camera.nearClipPlane = 0.01f;
                camera.farClipPlane = 10000f;

                // 카메라 위치 계산 - 바운더리 기반으로 전체가 보이도록
                PositionCameraToFitBounds(camera, bounds);

                // 렌더 텍스처
                var rt = new RenderTexture(THUMBNAIL_CAPTURE_SIZE, THUMBNAIL_CAPTURE_SIZE, 24, RenderTextureFormat.ARGB32);
                rt.antiAliasing = 4; // 안티앨리어싱 추가
                camera.targetTexture = rt;

                // 씬 조명이 없는 경우를 대비한 보조 조명
                GameObject backupLightGo = null;
                var existingLights = FindObjectsByType<Light>(FindObjectsSortMode.None);
                bool hasSceneLight = existingLights.Any(l => l.enabled && l.gameObject.activeInHierarchy && l.type == LightType.Directional);

                if (!hasSceneLight)
                {
                    // 씬에 디렉셔널 라이트가 없으면 임시 조명 추가
                    backupLightGo = new GameObject("[ThumbnailLight_Temp]");
                    var light = backupLightGo.AddComponent<Light>();
                    light.type = LightType.Directional;
                    light.transform.rotation = Quaternion.Euler(50, -30, 0);
                    light.intensity = 1.5f;
                    light.color = new Color(1f, 0.98f, 0.95f); // 약간 따뜻한 색

                    // 보조 조명 (필/림 라이트)
                    var fillLightGo = new GameObject("[ThumbnailFillLight_Temp]");
                    var fillLight = fillLightGo.AddComponent<Light>();
                    fillLight.type = LightType.Directional;
                    fillLight.transform.rotation = Quaternion.Euler(30, 150, 0);
                    fillLight.intensity = 0.5f;
                    fillLight.color = new Color(0.8f, 0.85f, 1f); // 약간 차가운 색
                    fillLightGo.transform.SetParent(backupLightGo.transform);
                }

                // 렌더링
                camera.Render();

                // 텍스처 읽기
                var texture = new Texture2D(THUMBNAIL_CAPTURE_SIZE, THUMBNAIL_CAPTURE_SIZE, TextureFormat.RGBA32, false);
                RenderTexture.active = rt;
                texture.ReadPixels(new Rect(0, 0, THUMBNAIL_CAPTURE_SIZE, THUMBNAIL_CAPTURE_SIZE), 0, 0);
                texture.Apply();
                RenderTexture.active = null;

                // 정리
                if (backupLightGo != null) DestroyImmediate(backupLightGo);
                DestroyImmediate(cameraGo);
                DestroyImmediate(rt);
                DestroyImmediate(tempInstance);

                return texture;
            }
            catch (Exception ex)
            {
                UnityEngine.Debug.LogError($"[PropBrowser] GeneratePreviewTexture 오류: {ex.Message}");
                DestroyImmediate(tempInstance);
                return null;
            }
        }

        /// <summary>
        /// 오브젝트의 전체 바운드 계산 (모든 렌더러, 스킨드 메시, 파티클 포함)
        /// </summary>
        private Bounds CalculateTotalBounds(GameObject obj)
        {
            var renderers = obj.GetComponentsInChildren<Renderer>(true);
            var skinnedMeshRenderers = obj.GetComponentsInChildren<SkinnedMeshRenderer>(true);
            var meshFilters = obj.GetComponentsInChildren<MeshFilter>(true);

            Bounds bounds = new Bounds(obj.transform.position, Vector3.zero);
            bool hasBounds = false;

            // 렌더러 바운드 수집
            foreach (var renderer in renderers)
            {
                // 파티클 시스템은 제외 (불필요하게 큰 바운드 생성)
                if (renderer is ParticleSystemRenderer) continue;

                if (!hasBounds)
                {
                    bounds = renderer.bounds;
                    hasBounds = true;
                }
                else
                {
                    bounds.Encapsulate(renderer.bounds);
                }
            }

            // 바운드가 없으면 MeshFilter에서 직접 계산
            if (!hasBounds)
            {
                foreach (var mf in meshFilters)
                {
                    if (mf.sharedMesh == null) continue;

                    var meshBounds = mf.sharedMesh.bounds;
                    var worldBounds = new Bounds(
                        mf.transform.TransformPoint(meshBounds.center),
                        Vector3.Scale(meshBounds.size, mf.transform.lossyScale)
                    );

                    if (!hasBounds)
                    {
                        bounds = worldBounds;
                        hasBounds = true;
                    }
                    else
                    {
                        bounds.Encapsulate(worldBounds);
                    }
                }
            }

            return bounds;
        }

        /// <summary>
        /// 카메라를 바운더리에 맞게 위치시켜 전체가 보이도록 함
        /// </summary>
        private void PositionCameraToFitBounds(Camera camera, Bounds bounds)
        {
            // 대각선 방향에서 촬영 (앞쪽에서 45도 각도)
            // Z+ 방향이 앞쪽이므로 Z를 양수로 설정하여 앞에서 촬영
            Vector3 viewDirection = new Vector3(-0.7f, 0.5f, 1f).normalized;

            // 바운드 크기 계산
            float boundsSphereRadius = bounds.extents.magnitude;

            // FOV 기반 거리 계산 - 전체가 화면에 들어오도록
            float fov = camera.fieldOfView * Mathf.Deg2Rad;
            float distance = boundsSphereRadius / Mathf.Sin(fov / 2f);

            // 약간의 여백 추가 (1.2배)
            distance *= 1.2f;

            // 카메라 위치 설정
            camera.transform.position = bounds.center + viewDirection * distance;
            camera.transform.LookAt(bounds.center);

            // 클리핑 평면 조정
            camera.nearClipPlane = Mathf.Max(0.01f, distance - boundsSphereRadius * 2f);
            camera.farClipPlane = distance + boundsSphereRadius * 2f;
        }

        #endregion

        #region Web Upload

        private void ShowWebUploadMenu()
        {
            var menu = new GenericMenu();

            menu.AddItem(new GUIContent("웹사이트에 업로드"), false, () => UploadToWebsite());
            menu.AddItem(new GUIContent("업로드 설정 열기"), false, () => WebsitePropExporter.ShowWindow());

            menu.ShowAsContext();
        }

        private void UploadToWebsite()
        {
            if (_database == null || _database.props.Count == 0)
            {
                EditorUtility.DisplayDialog("오류", "업로드할 프랍이 없습니다.", "확인");
                return;
            }

            // WebsitePropExporter 윈도우 열고 바로 업로드
            var exporter = EditorWindow.GetWindow<WebsitePropExporter>("프랍 업로드");
            exporter.UploadToWebsite();
        }

        #endregion
    }
}