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

[CustomEditor(typeof(InputGlyphDatabase))]
public class InputGlyphDatabaseEditor : Editor
{
    SerializedProperty tablesProp;
    SerializedProperty placeholderSpriteProp;
    InputGlyphDatabase db;

    int tabIndex = 0;
    bool showAddField = false;
    string newTableName = "";

    List<string> searchStrings = new List<string>();
    List<int> currentPages = new List<int>();

    // 每个表的临时字段，用于添加单个条目（目前仅支持 sprite）
    List<Sprite> newEntrySprites = new List<Sprite>();

    const int itemsPerPage = 10;
    const int previewSize = 52;

    void OnEnable()
    {
        db = target as InputGlyphDatabase;
        tablesProp = serializedObject.FindProperty("tables");
        placeholderSpriteProp = serializedObject.FindProperty("placeholderSprite");

        if (tablesProp == null)
        {
            Debug.LogError("Could not find serialized property 'tables' on InputGlyphDatabase. Check field name.");
            return;
        }

        EnsureDefaultTable("Keyboard");
        EnsureDefaultTable("Xbox");
        EnsureDefaultTable("PlayStation");

        SyncEditorListsWithTables();
    }

    public override void OnInspectorGUI()
    {
        serializedObject.Update();
        if (db == null || tablesProp == null) return;

        EditorGUILayout.BeginHorizontal(EditorStyles.toolbar);
        GUILayout.Space(4);

        if (GUILayout.Button("Save Asset", EditorStyles.toolbarButton))
        {
            serializedObject.ApplyModifiedProperties();
            EditorUtility.SetDirty(db);
            AssetDatabase.SaveAssets();
        }

        GUILayout.FlexibleSpace();

        if (GUILayout.Button(showAddField ? "Cancel +" : "+ Add Table", EditorStyles.toolbarButton, GUILayout.Width(110)))
        {
            showAddField = !showAddField;
            newTableName = "";
        }

        int settingsIndex = tablesProp != null ? tablesProp.arraySize : 0;
        bool settingsSelected = (tabIndex == settingsIndex);
        if (GUILayout.Toggle(settingsSelected, "Settings", EditorStyles.toolbarButton, GUILayout.Width(90)) != settingsSelected)
        {
            tabIndex = (tabIndex == settingsIndex) ? 0 : settingsIndex;
        }

        EditorGUILayout.EndHorizontal();

        if (showAddField)
        {
            EditorGUILayout.BeginHorizontal(EditorStyles.toolbar);
            GUILayout.Label("Name:", GUILayout.Width(40));
            newTableName = EditorGUILayout.TextField(newTableName);
            if (GUILayout.Button("Add", EditorStyles.toolbarButton, GUILayout.Width(80)))
            {
                string trimmed = newTableName != null ? newTableName.Trim() : "";
                if (string.IsNullOrEmpty(trimmed))
                {
                    EditorUtility.DisplayDialog("Invalid Name", "Table name cannot be empty.", "OK");
                }
                else
                {
                    bool exists = false;
                    for (int i = 0; i < tablesProp.arraySize; ++i)
                    {
                        var t = tablesProp.GetArrayElementAtIndex(i);
                        var nameProp = t.FindPropertyRelative("deviceName");
                        if (nameProp != null && string.Equals(nameProp.stringValue, trimmed, StringComparison.OrdinalIgnoreCase))
                        {
                            exists = true;
                            break;
                        }
                    }

                    if (exists)
                    {
                        EditorUtility.DisplayDialog("Duplicate", "A table with that name already exists.", "OK");
                    }
                    else
                    {
                        int newIndex = tablesProp.arraySize;
                        tablesProp.InsertArrayElementAtIndex(newIndex);
                        var newTable = tablesProp.GetArrayElementAtIndex(newIndex);
                        var nameProp = newTable.FindPropertyRelative("deviceName");
                        if (nameProp != null) nameProp.stringValue = trimmed;
                        var sheetProp = newTable.FindPropertyRelative("spriteSheetTexture");
                        if (sheetProp != null) sheetProp.objectReferenceValue = null;
                        var entriesProp = newTable.FindPropertyRelative("entries");
                        if (entriesProp != null) entriesProp.arraySize = 0;

                        serializedObject.ApplyModifiedProperties();
                        EditorUtility.SetDirty(db);

                        SyncEditorListsWithTables();

                        showAddField = false;
                        tabIndex = tablesProp.arraySize - 1;
                    }
                }
            }

            if (GUILayout.Button("Cancel", EditorStyles.toolbarButton, GUILayout.Width(80)))
            {
                showAddField = false;
                newTableName = "";
            }

            EditorGUILayout.EndHorizontal();
        }

        EditorGUILayout.Space(6);

        EditorGUILayout.BeginHorizontal(EditorStyles.toolbar);
        int tablesCount = tablesProp.arraySize;
        for (int i = 0; i < tablesCount; ++i)
        {
            var t = tablesProp.GetArrayElementAtIndex(i);
            var nameProp = t.FindPropertyRelative("deviceName");
            string name = nameProp != null ? nameProp.stringValue : ("Table " + i);
            bool selected = (tabIndex == i);
            if (GUILayout.Toggle(selected, name, EditorStyles.toolbarButton, GUILayout.MinWidth(60)))
            {
                tabIndex = i;
            }

            if (GUILayout.Button("×", EditorStyles.toolbarButton, GUILayout.Width(22)))
            {
                if (EditorUtility.DisplayDialog("Delete Table?",
                        $"Delete table '{name}' and all its entries? This cannot be undone.", "Delete", "Cancel"))
                {
                    tablesProp.DeleteArrayElementAtIndex(i);
                    serializedObject.ApplyModifiedProperties();
                    EditorUtility.SetDirty(db);

                    SyncEditorListsWithTables();
                    tabIndex = Mathf.Clamp(tabIndex, 0, Math.Max(0, tablesProp.arraySize - 1));
                    return;
                }
            }
        }

        EditorGUILayout.EndHorizontal();

        EditorGUILayout.Space(8);

        EditorGUILayout.BeginVertical("box");
        if (tabIndex == tablesProp.arraySize)
        {
            // 设置
            EditorGUILayout.LabelField("Settings", EditorStyles.boldLabel);
            EditorGUILayout.Space(4);
            EditorGUILayout.PropertyField(placeholderSpriteProp, new GUIContent("Placeholder Sprite"));
            Sprite placeholder = placeholderSpriteProp.objectReferenceValue as Sprite;
            EditorGUILayout.Space(6);
            EditorGUILayout.LabelField("Preview", EditorStyles.miniBoldLabel);
            if (placeholder != null)
            {
                Texture2D preview = AssetPreview.GetAssetPreview(placeholder);
                if (preview == null) preview = AssetPreview.GetMiniThumbnail(placeholder);
                if (preview != null) GUILayout.Label(preview, GUILayout.Width(previewSize), GUILayout.Height(previewSize));
                else EditorGUILayout.ObjectField(placeholder, typeof(Sprite), false, GUILayout.Width(previewSize), GUILayout.Height(previewSize));
            }
            else
            {
                EditorGUILayout.HelpBox("No placeholder sprite assigned. If FindEntryByControlPath receives an empty path, it will return null.", MessageType.Info);
            }
        }
        else
        {
            if (tabIndex < 0 || tabIndex >= tablesProp.arraySize)
            {
                EditorGUILayout.HelpBox("Invalid table index.", MessageType.Error);
            }
            else
            {
                var tableProp = tablesProp.GetArrayElementAtIndex(tabIndex);

                EnsureEditorListsLength();

                // 计算此表的 deviceName 和运行时索引（用于删除单个条目时）
                var nameProp = tableProp.FindPropertyRelative("deviceName");
                string deviceName = nameProp != null ? nameProp.stringValue : "";
                int runtimeTableIndex = MapSerializedTableToRuntimeIndex(deviceName);

                GUILayout.BeginHorizontal();
                GUIStyle searchStyle = EditorStyles.toolbarSearchField ?? EditorStyles.textField;
                searchStrings[tabIndex] = GUILayout.TextField(searchStrings[tabIndex] ?? "", searchStyle);
                GUILayout.EndHorizontal();

                EditorGUILayout.Space(6);

                var sheetProp = tableProp.FindPropertyRelative("spriteSheetTexture");
                EditorGUILayout.BeginHorizontal();
                GUILayout.Label("Sprite Sheet (Texture2D)", GUILayout.Width(140));
                EditorGUILayout.PropertyField(sheetProp, GUIContent.none, GUILayout.ExpandWidth(true));
                if (GUILayout.Button("Parse Sprite Sheet", GUILayout.Width(120)))
                {
                    ParseSpriteSheetIntoTableSerialized(tableProp);
                }


                if (GUILayout.Button("Clear", GUILayout.Width(80)))
                {
                    var entriesProp = tableProp.FindPropertyRelative("entries");
                    if (entriesProp != null) entriesProp.arraySize = 0;
                    if (runtimeTableIndex >= 0 && db != null)
                    {
                        var table = db.tables[runtimeTableIndex];
                        if (table != null) table.entries.Clear();
                    }

                    serializedObject.ApplyModifiedProperties();
                    EditorUtility.SetDirty(db);
                    currentPages[tabIndex] = 0;
                }

                EditorGUILayout.EndHorizontal();

                var platformProp = tableProp.FindPropertyRelative("platformIcons");
                EditorGUILayout.PropertyField(platformProp, new GUIContent("Platforms Icons"));
                Sprite placeholder = platformProp.objectReferenceValue as Sprite;
                EditorGUILayout.Space(6);
                EditorGUILayout.LabelField("Preview", EditorStyles.miniBoldLabel);
                if (placeholder != null)
                {
                    Texture2D preview = AssetPreview.GetAssetPreview(placeholder);
                    if (preview == null) preview = AssetPreview.GetMiniThumbnail(placeholder);
                    if (preview != null) GUILayout.Label(preview, GUILayout.Width(previewSize), GUILayout.Height(previewSize));
                    else EditorGUILayout.ObjectField(placeholder, typeof(Sprite), false, GUILayout.Width(previewSize), GUILayout.Height(previewSize));
                }
                else
                {
                    EditorGUILayout.HelpBox("No PlatformIcons.", MessageType.Info);
                }

                EditorGUILayout.Space(6);

                // ---- 新增：单个新增 Entry 的 UI（只支持 Sprite） ----
                EditorGUILayout.BeginVertical("box");
                EditorGUILayout.LabelField("Add Single Entry", EditorStyles.boldLabel);
                EditorGUILayout.BeginHorizontal();
                GUILayout.Label("Sprite", GUILayout.Width(50));
                newEntrySprites[tabIndex] = (Sprite)EditorGUILayout.ObjectField(newEntrySprites[tabIndex], typeof(Sprite), false, GUILayout.Width(80), GUILayout.Height(80));
                GUILayout.FlexibleSpace();
                EditorGUILayout.EndHorizontal();
                EditorGUILayout.Space(6);
                EditorGUILayout.BeginHorizontal();
                GUILayout.FlexibleSpace();
                if (GUILayout.Button("Add Entry", GUILayout.Width(110)))
                {
                    if (newEntrySprites[tabIndex] == null)
                    {
                        EditorUtility.DisplayDialog("Missing Sprite", "Please assign a Sprite to add.", "OK");
                    }
                    else
                    {
                        AddEntryToTableSerialized(tableProp, newEntrySprites[tabIndex]);
                        // reset temp field
                        newEntrySprites[tabIndex] = null;
                        currentPages[tabIndex] = 0;
                    }
                }

                EditorGUILayout.EndHorizontal();
                EditorGUILayout.EndVertical();
                // ---- end add-single-entry UI ----

                EditorGUILayout.Space(6);

                var entries = tableProp.FindPropertyRelative("entries");
                if (entries != null)
                {
                    int total = entries.arraySize;
                    List<int> matchedIndices = new List<int>();
                    string query = (searchStrings[tabIndex] ?? "").Trim();
                    for (int i = 0; i < total; ++i)
                    {
                        var eProp = entries.GetArrayElementAtIndex(i);
                        if (eProp == null) continue;
                        var spriteProp = eProp.FindPropertyRelative("Sprite");
                        Sprite s = spriteProp.objectReferenceValue as Sprite;
                        string name = s != null ? s.name : "";
                        if (string.IsNullOrEmpty(query) || name.IndexOf(query, StringComparison.OrdinalIgnoreCase) >= 0)
                        {
                            matchedIndices.Add(i);
                        }
                    }

                    int matchedTotal = matchedIndices.Count;
                    int totalPages = Mathf.Max(1, (matchedTotal + itemsPerPage - 1) / itemsPerPage);
                    currentPages[tabIndex] = Mathf.Clamp(currentPages[tabIndex], 0, totalPages - 1);

                    EditorGUILayout.BeginHorizontal();
                    if (GUILayout.Button("<<", EditorStyles.miniButtonLeft, GUILayout.Width(36)))
                    {
                        currentPages[tabIndex] = 0;
                    }

                    if (GUILayout.Button("<", EditorStyles.miniButtonMid, GUILayout.Width(36)))
                    {
                        currentPages[tabIndex] = Mathf.Max(0, currentPages[tabIndex] - 1);
                    }

                    GUILayout.FlexibleSpace();
                    EditorGUILayout.LabelField(string.Format("Page {0}/{1}", currentPages[tabIndex] + 1, totalPages), GUILayout.Width(120));
                    GUILayout.FlexibleSpace();

                    if (GUILayout.Button(">", EditorStyles.miniButtonMid, GUILayout.Width(36)))
                    {
                        currentPages[tabIndex] = Mathf.Min(totalPages - 1, currentPages[tabIndex] + 1);
                    }

                    if (GUILayout.Button(">>", EditorStyles.miniButtonRight, GUILayout.Width(36)))
                    {
                        currentPages[tabIndex] = totalPages - 1;
                    }

                    EditorGUILayout.EndHorizontal();

                    EditorGUILayout.Space(4);

                    int start = currentPages[tabIndex] * itemsPerPage;
                    int end = Math.Min(start + itemsPerPage, matchedTotal);

                    for (int mi = start; mi < end; ++mi)
                    {
                        int i = matchedIndices[mi];
                        var eProp = entries.GetArrayElementAtIndex(i);
                        if (eProp == null) continue;

                        // 显示一个条目，右侧带有小的删除按钮
                        using (new EditorGUILayout.HorizontalScope("box"))
                        {
                            // 左侧：预览列
                            using (new EditorGUILayout.VerticalScope(GUILayout.Width(80)))
                            {
                                var spriteProp = eProp.FindPropertyRelative("Sprite");
                                Sprite s = spriteProp.objectReferenceValue as Sprite;
                                EditorGUILayout.LabelField(s != null ? s.name : "<missing>", EditorStyles.boldLabel);

                                if (s != null)
                                {
                                    Texture2D preview = AssetPreview.GetAssetPreview(s);
                                    if (preview == null) preview = AssetPreview.GetMiniThumbnail(s);
                                    if (preview != null)
                                    {
                                        GUILayout.Label(preview, GUILayout.Width(previewSize), GUILayout.Height(previewSize));
                                    }
                                    else
                                    {
                                        EditorGUILayout.PropertyField(spriteProp, GUIContent.none, GUILayout.Width(previewSize), GUILayout.Height(previewSize));
                                    }
                                }
                                else
                                {
                                    EditorGUILayout.PropertyField(spriteProp, GUIContent.none, GUILayout.Width(previewSize), GUILayout.Height(previewSize));
                                }
                            }

                            // 中间：操作列
                            EditorGUILayout.BeginVertical();
                            var actionProp = eProp.FindPropertyRelative("action");
                            EditorGUILayout.Space(2);
                            EditorGUILayout.PropertyField(actionProp, GUIContent.none, GUILayout.ExpandWidth(true));
                            EditorGUILayout.EndVertical();

                            // 右侧：小的删除按钮
                            GUILayout.Space(6);
                            if (GUILayout.Button("×", EditorStyles.toolbarButton, GUILayout.Width(24)))
                            {
                                string spriteName = null;
                                var sProp = eProp.FindPropertyRelative("Sprite");
                                if (sProp != null) spriteName = (sProp.objectReferenceValue as Sprite)?.name;

                                if (EditorUtility.DisplayDialog("Remove Entry?",
                                        $"Remove entry '{(string.IsNullOrEmpty(spriteName) ? "<missing>" : spriteName)}' from table '{deviceName}'?", "Remove", "Cancel"))
                                {
                                    // 从序列化数组中移除
                                    var entriesProp = tableProp.FindPropertyRelative("entries");
                                    if (entriesProp != null && i >= 0 && i < entriesProp.arraySize)
                                    {
                                        entriesProp.DeleteArrayElementAtIndex(i);
                                        // 应用后从运行时移除以保持两者同步
                                        serializedObject.ApplyModifiedProperties();
                                    }

                                    // 从运行时列表中移除（db.tables）
                                    if (runtimeTableIndex >= 0 && db != null && db.tables != null && runtimeTableIndex < db.tables.Count)
                                    {
                                        var runtimeTable = db.tables[runtimeTableIndex];
                                        if (runtimeTable != null && i >= 0 && i < runtimeTable.entries.Count)
                                        {
                                            runtimeTable.entries.RemoveAt(i);
                                        }
                                    }

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

                                    // 重置分页并返回，避免继续迭代已变更的序列化数组
                                    currentPages[tabIndex] = 0;
                                    return;
                                }
                            }
                        }

                        EditorGUILayout.Space(4);
                    }

                    if (matchedTotal == 0)
                    {
                        EditorGUILayout.HelpBox("No entries match the search.", MessageType.Info);
                    }
                }
            }
        }

        EditorGUILayout.EndVertical();

        EditorGUILayout.Space(6);

        serializedObject.ApplyModifiedProperties();
    }

    void EnsureDefaultTable(string name)
    {
        if (tablesProp == null) return;
        for (int i = 0; i < tablesProp.arraySize; ++i)
        {
            var t = tablesProp.GetArrayElementAtIndex(i);
            var nameProp = t.FindPropertyRelative("deviceName");
            if (nameProp != null && string.Equals(nameProp.stringValue, name, StringComparison.OrdinalIgnoreCase))
                return;
        }

        int idx = tablesProp.arraySize;
        tablesProp.InsertArrayElementAtIndex(idx);
        var newTable = tablesProp.GetArrayElementAtIndex(idx);
        var deviceNameProp = newTable.FindPropertyRelative("deviceName");
        if (deviceNameProp != null) deviceNameProp.stringValue = name;
        var sheetProp = newTable.FindPropertyRelative("spriteSheetTexture");
        if (sheetProp != null) sheetProp.objectReferenceValue = null;
        var entriesProp = newTable.FindPropertyRelative("entries");
        if (entriesProp != null) entriesProp.arraySize = 0;

        serializedObject.ApplyModifiedProperties();
        EditorUtility.SetDirty(db);
    }

    void SyncEditorListsWithTables()
    {
        int count = tablesProp != null ? tablesProp.arraySize : 0;
        if (searchStrings == null) searchStrings = new List<string>();
        if (currentPages == null) currentPages = new List<int>();
        if (newEntrySprites == null) newEntrySprites = new List<Sprite>();

        while (searchStrings.Count < count) searchStrings.Add("");
        while (currentPages.Count < count) currentPages.Add(0);
        while (newEntrySprites.Count < count) newEntrySprites.Add(null);

        while (searchStrings.Count > count) searchStrings.RemoveAt(searchStrings.Count - 1);
        while (currentPages.Count > count) currentPages.RemoveAt(currentPages.Count - 1);
        while (newEntrySprites.Count > count) newEntrySprites.RemoveAt(newEntrySprites.Count - 1);
    }

    void EnsureEditorListsLength()
    {
        if (tablesProp == null) return;
        SyncEditorListsWithTables();
    }

    // ----- 新增：把单个 Sprite 加入到序列化表和 runtime 表 -----
    void AddEntryToTableSerialized(SerializedProperty tableProp, Sprite sprite)
    {
        if (tableProp == null) return;
        var entriesProp = tableProp.FindPropertyRelative("entries");
        if (entriesProp == null) return;

        int insertIndex = entriesProp.arraySize;
        entriesProp.InsertArrayElementAtIndex(insertIndex);
        var newE = entriesProp.GetArrayElementAtIndex(insertIndex);
        if (newE != null)
        {
            var spriteProp = newE.FindPropertyRelative("Sprite");
            var actionProp = newE.FindPropertyRelative("action");

            if (spriteProp != null) spriteProp.objectReferenceValue = sprite;

            // 保持 action 序列化不变（大多数项目无法在此处直接序列化 InputAction）
            if (actionProp != null)
            {
                try
                {
                    actionProp.objectReferenceValue = null;
                }
                catch
                {
                }
            }
        }

        serializedObject.ApplyModifiedProperties();

        // 同时添加到运行时列表
        var nameProp = tableProp.FindPropertyRelative("deviceName");
        string deviceName = nameProp != null ? nameProp.stringValue : "";
        int tableIndex = MapSerializedTableToRuntimeIndex(deviceName);
        if (tableIndex >= 0 && db != null && db.tables != null && tableIndex < db.tables.Count)
        {
            var tableObj = db.tables[tableIndex];
            GlyphEntry e = new GlyphEntry();
            e.Sprite = sprite;
            e.action = null; // runtime only: none provided here
            tableObj.entries.Add(e);
        }

        EditorUtility.SetDirty(db);
        AssetDatabase.SaveAssets();
    }


// ----- Parse Sprite Sheet (Texture2D with Multiple) -----
// 只用名称匹配覆盖 Sprite，不改变已有 action
    void ParseSpriteSheetIntoTableSerialized(SerializedProperty tableProp)
    {
        if (tableProp == null) return;

        var sheetProp = tableProp.FindPropertyRelative("spriteSheetTexture");
        var tex = sheetProp != null ? sheetProp.objectReferenceValue as Texture2D : null;
        if (tex == null)
        {
            Debug.LogWarning("[InputGlyphDatabase] spriteSheetTexture is null for table.");
            return;
        }

        var nameProp = tableProp.FindPropertyRelative("deviceName");
        string deviceName = nameProp != null ? nameProp.stringValue : "";

        int tableIndex = MapSerializedTableToRuntimeIndex(deviceName);
        if (tableIndex < 0)
        {
            Debug.LogError($"[InputGlyphDatabase] Could not map serialized table '{deviceName}' to runtime db.tables.");
            return;
        }

        var tableObj = db.tables[tableIndex];
        if (tableObj == null)
        {
            Debug.LogError($"[InputGlyphDatabase] Runtime table object is null for '{deviceName}'.");
            return;
        }

        string path = AssetDatabase.GetAssetPath(tex);
        if (string.IsNullOrEmpty(path))
        {
            Debug.LogWarning("[InputGlyphDatabase] Could not get asset path for texture.");
            return;
        }

        var assets = AssetDatabase.LoadAllAssetsAtPath(path);
        if (assets == null || assets.Length == 0)
        {
            Debug.LogWarning("[InputGlyphDatabase] No sub-assets found at path: " + path);
            return;
        }

        // 收集 sprites（按照文件内顺序；你如果想按名字排序可以在这里加）
        List<Sprite> sprites = new List<Sprite>();
        foreach (var a in assets)
        {
            if (a is Sprite sp) sprites.Add(sp);
        }

        var entriesProp = tableProp.FindPropertyRelative("entries");
        if (entriesProp == null)
        {
            Debug.LogWarning("[InputGlyphDatabase] entries property not found on table.");
            return;
        }

        // 构建序列化表名 -> 索引 映射（忽略大小写）
        var serializedNameToIndex = new Dictionary<string, int>(StringComparer.OrdinalIgnoreCase);
        for (int i = 0; i < entriesProp.arraySize; ++i)
        {
            var eProp = entriesProp.GetArrayElementAtIndex(i);
            if (eProp == null) continue;
            var sProp = eProp.FindPropertyRelative("Sprite");
            var sRef = sProp != null ? sProp.objectReferenceValue as Sprite : null;
            if (sRef != null && !serializedNameToIndex.ContainsKey(sRef.name))
            {
                serializedNameToIndex[sRef.name] = i;
            }
        }

        // runtime 名称 -> 索引 映射
        var runtimeNameToIndex = new Dictionary<string, int>(StringComparer.OrdinalIgnoreCase);
        for (int i = 0; i < tableObj.entries.Count; ++i)
        {
            var re = tableObj.entries[i];
            if (re != null && re.Sprite != null)
            {
                var rn = re.Sprite.name;
                if (!runtimeNameToIndex.ContainsKey(rn))
                    runtimeNameToIndex[rn] = i;
            }
        }

        int replaced = 0, added = 0;

        foreach (var sp in sprites)
        {
            if (sp == null) continue;
            string nm = sp.name;

            // -- 序列化层：同名则替换 Sprite 引用（不触碰 action），否则新增元素并把 action 设为 null --
            if (serializedNameToIndex.TryGetValue(nm, out int sIndex))
            {
                var eProp = entriesProp.GetArrayElementAtIndex(sIndex);
                if (eProp != null)
                {
                    var spriteProp = eProp.FindPropertyRelative("Sprite");
                    if (spriteProp != null) spriteProp.objectReferenceValue = sp;
                    // 不修改 actionProp，保持原有 action（如果有的话）
                }

                replaced++;
            }
            else
            {
                int insertIndex = entriesProp.arraySize;
                entriesProp.InsertArrayElementAtIndex(insertIndex);
                var newE = entriesProp.GetArrayElementAtIndex(insertIndex);
                if (newE != null)
                {
                    var spriteProp = newE.FindPropertyRelative("Sprite");
                    var actionProp = newE.FindPropertyRelative("action");
                    if (spriteProp != null) spriteProp.objectReferenceValue = sp;
                    if (actionProp != null) actionProp.objectReferenceValue = null; // 新增项 action 为空
                }

                serializedNameToIndex[nm] = insertIndex;
                added++;
            }

            // -- 运行时层：同名则替换 Sprite，否则新增 runtime entry（action 设 null，保持之前 runtime entry 的 action 不变） --
            if (runtimeNameToIndex.TryGetValue(nm, out int rIndex))
            {
                var runtimeEntry = tableObj.entries[rIndex];
                if (runtimeEntry != null) runtimeEntry.Sprite = sp;
            }
            else
            {
                GlyphEntry ge = new GlyphEntry();
                ge.Sprite = sp;
                ge.action = null;
                tableObj.entries.Add(ge);
                runtimeNameToIndex[nm] = tableObj.entries.Count - 1;
            }
        }

        // 应用并保存修改（序列化层与 runtime 层保持同步）
        EditorUtility.SetDirty(db);
        serializedObject.Update();
        serializedObject.ApplyModifiedProperties();
        AssetDatabase.SaveAssets();

        Debug.Log($"[InputGlyphDatabase] Merged sprite sheet '{tex.name}' into table '{deviceName}'. spritesFound={sprites.Count}, replaced={replaced}, added={added}, totalEntries={tableObj.entries.Count}");
    }

    int MapSerializedTableToRuntimeIndex(string deviceName)
    {
        if (db == null || db.tables == null) return -1;
        for (int ti = 0; ti < db.tables.Count; ++ti)
        {
            if (string.Equals(db.tables[ti].deviceName, deviceName, StringComparison.OrdinalIgnoreCase))
                return ti;
        }

        return -1;
    }
}