using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using UnityEditor;
using UnityEditor.AddressableAssets;
using UnityEditor.AddressableAssets.Settings;
using UnityEngine;

/// <summary>
/// 资源依赖分析器
/// 用于查找某个 Prefab / 资源 关联的所有依赖资源，并标记其在 Addressables 中的归属（Group、Address、Labels），
/// 供 AA 分包调查使用。
/// 菜单：Tools → 资源依赖分析器
/// </summary>
public class AssetDependencyAnalyzer : EditorWindow
{
    // ============================ 日志开关 ============================
    // 启用: Player Settings → Scripting Define Symbols 添加 ENABLE_EDITOR_LOG
    // 关闭: 删除该符号。未定义时所有 Log/LogError 调用被编译器自动移除,零开销
    [System.Diagnostics.Conditional("ENABLE_EDITOR_LOG")]
    private static void Log(string msg) { Debug.Log(msg); }

    [System.Diagnostics.Conditional("ENABLE_EDITOR_LOG")]
    private static void LogError(string msg) { Debug.LogError(msg); }

    #region 内部类

    [Serializable]
    public class DependencyInfo
    {
        public string assetPath;
        public string guid;
        public Type type;
        public string typeName;
        public bool isInAddressables;
        public string aaAddress;
        public string aaGroup;
        public List<string> aaLabels = new List<string>();
        public long fileSizeBytes;
        public string fileSizeReadable;
    }

    #endregion

    #region 字段

    private Vector2 leftScroll;
    private Vector2 rightScroll;
    private Vector2 statsScroll;

    // 输入：单个目标
    private UnityEngine.Object targetAsset;

    // 批量目标
    private List<UnityEngine.Object> batchTargets = new List<UnityEngine.Object>();
    private bool useBatchMode = false;

    // 收集结果
    private List<DependencyInfo> dependencies = new List<DependencyInfo>();
    private Dictionary<string, DependencyInfo> dependencyMap = new Dictionary<string, DependencyInfo>();

    // 反向查找（谁引用了这个资源）
    private readonly Dictionary<string, List<string>> reverseRefMap = new Dictionary<string, List<string>>();

    // 过滤
    private enum FilterMode
    {
        All,
        InAddressables,
        NotInAddressables
    }
    private FilterMode filterMode = FilterMode.All;
    private string typeFilter = "全部";
    private string groupFilter = "全部";
    private string labelFilter = "全部";
    private string pathKeyword = "";

    // 展示
    private bool showStats = true;
    private bool showFilter = true;
    private bool showBatchList = true;

    // 缓存
    private AddressableAssetSettings aaSettings;
    private List<string> allGroups = new List<string>();
    private List<string> allLabels = new List<string>();
    private List<string> allTypes = new List<string>();
    private bool includeScripts = false;
    private bool deepAnalyze = true;

    #endregion

    #region 菜单与初始化

    [MenuItem("Tools/资源依赖分析器", false, 200)]
    public static void OpenWindow()
    {
        var window = GetWindow<AssetDependencyAnalyzer>("资源依赖分析器");
        window.minSize = new Vector2(1000, 600);
        window.Show();
    }

    private void OnEnable()
    {
        RefreshAACache();
    }

    private void RefreshAACache()
    {
        aaSettings = AddressableAssetSettingsDefaultObject.Settings;
        allGroups.Clear();
        allLabels.Clear();
        if (aaSettings != null)
        {
            foreach (var g in aaSettings.groups)
            {
                if (g != null) allGroups.Add(g.Name);
            }
            allLabels.AddRange(aaSettings.GetLabels());
        }
    }

    #endregion

    #region 主GUI

    private void OnGUI()
    {
        DrawToolbar();

        EditorGUILayout.Space(4);
        DrawTargetSelector();

        if (showFilter)
        {
            EditorGUILayout.Space(4);
            DrawFilterBar();
        }

        if (showStats && dependencies.Count > 0)
        {
            EditorGUILayout.Space(4);
            DrawStats();
        }

        EditorGUILayout.Space(4);
        DrawDependencyList();
    }

    #endregion

    #region 工具栏

    private void DrawToolbar()
    {
        EditorGUILayout.BeginHorizontal(EditorStyles.toolbar);
        if (GUILayout.Button("分析依赖", EditorStyles.toolbarButton, GUILayout.Width(80)))
        {
            AnalyzeAll();
        }
        if (GUILayout.Button("反向查找引用", EditorStyles.toolbarButton, GUILayout.Width(100)))
        {
            ReverseLookupSelected();
        }
        if (GUILayout.Button("导出报告", EditorStyles.toolbarButton, GUILayout.Width(80)))
        {
            ExportReport();
        }
        if (GUILayout.Button("复制AA地址", EditorStyles.toolbarButton, GUILayout.Width(90)))
        {
            CopySelectedAddresses();
        }
        if (GUILayout.Button("加入AA(选中)", EditorStyles.toolbarButton, GUILayout.Width(110)))
        {
            AddSelectedToAddressables();
        }
        GUILayout.FlexibleSpace();
        if (GUILayout.Button("刷新AA缓存", EditorStyles.toolbarButton, GUILayout.Width(90)))
        {
            RefreshAACache();
        }
        EditorGUILayout.EndHorizontal();

        EditorGUILayout.BeginHorizontal(EditorStyles.toolbar);
        showFilter = GUILayout.Toggle(showFilter, "过滤", EditorStyles.toolbarButton, GUILayout.Width(50));
        showStats = GUILayout.Toggle(showStats, "统计", EditorStyles.toolbarButton, GUILayout.Width(50));
        showBatchList = GUILayout.Toggle(showBatchList, "批量列表", EditorStyles.toolbarButton, GUILayout.Width(70));
        useBatchMode = GUILayout.Toggle(useBatchMode, "批量模式", EditorStyles.toolbarButton, GUILayout.Width(70));
        GUILayout.FlexibleSpace();
        includeScripts = GUILayout.Toggle(includeScripts, "包含脚本", GUILayout.Width(80));
        deepAnalyze = GUILayout.Toggle(deepAnalyze, "递归依赖", GUILayout.Width(80));
        EditorGUILayout.EndHorizontal();
    }

    #endregion

    #region 目标选择

    private void DrawTargetSelector()
    {
        EditorGUILayout.BeginVertical("box");

        if (!useBatchMode)
        {
            EditorGUILayout.LabelField("目标资源（Prefab / 贴图 / 音频 / 材质等，可拖拽）", EditorStyles.boldLabel);
            var newObj = EditorGUILayout.ObjectField("目标", targetAsset, typeof(UnityEngine.Object), false);
            if (newObj != targetAsset)
            {
                targetAsset = newObj;
            }
            EditorGUILayout.HelpBox(
                "操作说明：\n" +
                "1. 拖拽或选择目标资源（通常是 Prefab）。\n" +
                "2. 点击「分析依赖」递归收集所有依赖资源。\n" +
                "3. 通过过滤栏查看 AA 内 / 非 AA 资源，便于分包决策。\n" +
                "4. 选中非 AA 资源后点击「加入AA」可直接添加到指定 Group。\n" +
                "5. 「反向查找引用」会扫描所有 AA 条目，找出谁引用了当前选中资源。",
                MessageType.Info);
        }
        else
        {
            EditorGUILayout.LabelField("批量目标列表（可拖拽多个资源到下方区域）", EditorStyles.boldLabel);

            // 拖拽区域
            Rect dropRect = GUILayoutUtility.GetRect(0, 80, GUILayout.ExpandWidth(true));
            GUI.Box(dropRect, "拖拽资源到此处添加到批量列表");
            HandleDragDrop(dropRect);

            // 列表显示
            if (showBatchList && batchTargets.Count > 0)
            {
                leftScroll = EditorGUILayout.BeginScrollView(leftScroll, GUILayout.Height(120));
                for (int i = 0; i < batchTargets.Count; i++)
                {
                    EditorGUILayout.BeginHorizontal();
                    var obj = EditorGUILayout.ObjectField(batchTargets[i], typeof(UnityEngine.Object), false);
                    if (obj != batchTargets[i]) batchTargets[i] = obj;
                    if (GUILayout.Button("×", GUILayout.Width(20)))
                    {
                        batchTargets.RemoveAt(i);
                        break;
                    }
                    EditorGUILayout.EndHorizontal();
                }
                EditorGUILayout.EndScrollView();

                EditorGUILayout.BeginHorizontal();
                if (GUILayout.Button("清空列表", GUILayout.Width(80)))
                {
                    batchTargets.Clear();
                }
                EditorGUILayout.LabelField($"共 {batchTargets.Count} 个目标", EditorStyles.miniLabel);
                EditorGUILayout.EndHorizontal();
            }
        }

        EditorGUILayout.EndVertical();
    }

    private void HandleDragDrop(Rect dropRect)
    {
        var evt = Event.current;
        if (!dropRect.Contains(evt.mousePosition)) return;

        if (evt.type == EventType.DragUpdated)
        {
            DragAndDrop.visualMode = DragAndDropVisualMode.Generic;
            evt.Use();
        }
        else if (evt.type == EventType.DragPerform)
        {
            DragAndDrop.AcceptDrag();
            foreach (var path in DragAndDrop.paths)
            {
                var obj = AssetDatabase.LoadAssetAtPath<UnityEngine.Object>(path);
                if (obj != null && !batchTargets.Contains(obj))
                {
                    batchTargets.Add(obj);
                }
            }
            evt.Use();
        }
    }

    #endregion

    #region 过滤栏

    private void DrawFilterBar()
    {
        EditorGUILayout.BeginVertical("box");

        EditorGUILayout.BeginHorizontal();
        filterMode = (FilterMode)EditorGUILayout.EnumPopup("归属", filterMode, GUILayout.Width(180));

        // 类型过滤
        var typeOptions = new List<string> { "全部" };
        typeOptions.AddRange(allTypes);
        int typeIdx = Mathf.Max(0, typeOptions.IndexOf(typeFilter));
        typeIdx = EditorGUILayout.Popup("类型", typeIdx, typeOptions.ToArray(), GUILayout.Width(180));
        typeFilter = typeOptions[typeIdx];

        // Group过滤
        var groupOptions = new List<string> { "全部", "(非AA)" };
        groupOptions.AddRange(allGroups);
        int gIdx = Mathf.Max(0, groupOptions.IndexOf(groupFilter));
        gIdx = EditorGUILayout.Popup("Group", gIdx, groupOptions.ToArray(), GUILayout.Width(180));
        groupFilter = groupOptions[gIdx];

        EditorGUILayout.EndHorizontal();

        EditorGUILayout.BeginHorizontal();
        var labelOptions = new List<string> { "全部", "(无标签)" };
        labelOptions.AddRange(allLabels);
        int lIdx = Mathf.Max(0, labelOptions.IndexOf(labelFilter));
        lIdx = EditorGUILayout.Popup("Label", lIdx, labelOptions.ToArray(), GUILayout.Width(180));
        labelFilter = labelOptions[lIdx];

        pathKeyword = EditorGUILayout.TextField("路径关键字", pathKeyword, GUILayout.Width(220));
        if (GUILayout.Button("清空过滤", GUILayout.Width(80)))
        {
            filterMode = FilterMode.All;
            typeFilter = "全部";
            groupFilter = "全部";
            labelFilter = "全部";
            pathKeyword = "";
        }
        EditorGUILayout.EndHorizontal();

        EditorGUILayout.EndVertical();
    }

    #endregion

    #region 统计

    private void DrawStats()
    {
        EditorGUILayout.BeginVertical("box");

        EditorGUILayout.LabelField("统计", EditorStyles.boldLabel);

        int totalCount = dependencies.Count;
        int aaCount = dependencies.Count(d => d.isInAddressables);
        int nonAACount = totalCount - aaCount;
        long totalSize = dependencies.Sum(d => d.fileSizeBytes);

        EditorGUILayout.LabelField($"总依赖数: {totalCount}    AA内: {aaCount}    非AA: {nonAACount}    总大小: {FormatSize(totalSize)}");

        // 按类型统计
        statsScroll = EditorGUILayout.BeginScrollView(statsScroll, GUILayout.Height(140));
        var byType = dependencies.GroupBy(d => d.typeName).OrderByDescending(g => g.Count());
        EditorGUILayout.LabelField("按类型统计:", EditorStyles.miniBoldLabel);
        foreach (var grp in byType)
        {
            long s = grp.Sum(d => d.fileSizeBytes);
            int aaInGroup = grp.Count(d => d.isInAddressables);
            EditorGUILayout.LabelField($"  {grp.Key}: {grp.Count()} 个 (AA内 {aaInGroup}) 大小 {FormatSize(s)}", EditorStyles.miniLabel);
        }

        // 按 Group 统计
        EditorGUILayout.Space(4);
        EditorGUILayout.LabelField("按 AA Group 统计:", EditorStyles.miniBoldLabel);
        var byGroup = dependencies.Where(d => d.isInAddressables).GroupBy(d => d.aaGroup).OrderByDescending(g => g.Count());
        foreach (var grp in byGroup)
        {
            long s = grp.Sum(d => d.fileSizeBytes);
            EditorGUILayout.LabelField($"  {grp.Key}: {grp.Count()} 个 大小 {FormatSize(s)}", EditorStyles.miniLabel);
        }

        // 非 AA 资源按目录统计
        EditorGUILayout.Space(4);
        EditorGUILayout.LabelField("非AA资源按目录统计:", EditorStyles.miniBoldLabel);
        var nonAAByDir = dependencies
            .Where(d => !d.isInAddressables)
            .GroupBy(d => Path.GetDirectoryName(d.assetPath)?.Replace('\\', '/'))
            .OrderByDescending(g => g.Count());
        foreach (var grp in nonAAByDir)
        {
            long s = grp.Sum(d => d.fileSizeBytes);
            EditorGUILayout.LabelField($"  {grp.Key}: {grp.Count()} 个 大小 {FormatSize(s)}", EditorStyles.miniLabel);
        }

        EditorGUILayout.EndScrollView();
        EditorGUILayout.EndVertical();
    }

    #endregion

    #region 依赖列表

    private void DrawDependencyList()
    {
        if (dependencies.Count == 0)
        {
            EditorGUILayout.HelpBox("尚未分析。请选择目标资源后点击「分析依赖」。", MessageType.Info);
            return;
        }

        var filtered = ApplyFilter(dependencies);

        EditorGUILayout.BeginHorizontal();
        EditorGUILayout.LabelField($"依赖列表 (过滤后: {filtered.Count} / {dependencies.Count})", EditorStyles.boldLabel);
        GUILayout.FlexibleSpace();
        if (GUILayout.Button("全选非AA", GUILayout.Width(80)))
        {
            SelectAllNonAA();
        }
        EditorGUILayout.EndHorizontal();

        rightScroll = EditorGUILayout.BeginScrollView(rightScroll);

        // 表头
        EditorGUILayout.BeginHorizontal("box");
        EditorGUILayout.LabelField("", GUILayout.Width(20));
        EditorGUILayout.LabelField("资源路径", GUILayout.Width(300));
        EditorGUILayout.LabelField("类型", GUILayout.Width(80));
        EditorGUILayout.LabelField("大小", GUILayout.Width(70));
        EditorGUILayout.LabelField("AA归属", GUILayout.Width(120));
        EditorGUILayout.LabelField("Address", GUILayout.Width(150));
        EditorGUILayout.LabelField("Labels", GUILayout.Width(150));
        EditorGUILayout.EndHorizontal();

        foreach (var info in filtered)
        {
            DrawDependencyRow(info);
        }

        EditorGUILayout.EndScrollView();
    }

    private List<DependencyInfo> GetFilteredCache()
    {
        return ApplyFilter(dependencies);
    }

    private void SelectAllNonAA()
    {
        var filtered = GetFilteredCache();
        var nonAA = filtered.Where(d => !d.isInAddressables).Select(d => d.assetPath).ToList();
        var objs = new List<UnityEngine.Object>();
        foreach (var p in nonAA)
        {
            var o = AssetDatabase.LoadAssetAtPath<UnityEngine.Object>(p);
            if (o != null) objs.Add(o);
        }
        Selection.objects = objs.ToArray();
        Log($"[依赖分析器] 已选中 {objs.Count} 个非AA资源到 Project 视图");
    }

    private void DrawDependencyRow(DependencyInfo info)
    {
        EditorGUILayout.BeginHorizontal(GUIStyle.none);

        // 复选框（仅展示，不维护勾选状态，使用 Selection.paths 作为统一选择机制）
        bool selected = Selection.objects != null && Selection.objects.Any(o =>
            o != null && AssetDatabase.GetAssetPath(o) == info.assetPath);
        bool newSel = EditorGUILayout.Toggle(selected, GUILayout.Width(20));
        if (newSel != selected)
        {
            var obj = AssetDatabase.LoadAssetAtPath<UnityEngine.Object>(info.assetPath);
            if (obj != null)
            {
                var list = Selection.objects != null ? Selection.objects.ToList() : new List<UnityEngine.Object>();
                if (newSel && !list.Contains(obj)) list.Add(obj);
                if (!newSel && list.Contains(obj)) list.Remove(obj);
                Selection.objects = list.ToArray();
            }
        }

        // 路径（可点击定位）
        if (GUILayout.Button(info.assetPath, EditorStyles.label, GUILayout.Width(300)))
        {
            var obj = AssetDatabase.LoadAssetAtPath<UnityEngine.Object>(info.assetPath);
            if (obj != null)
            {
                EditorGUIUtility.PingObject(obj);
                Selection.activeObject = obj;
            }
        }

        EditorGUILayout.LabelField(info.typeName, GUILayout.Width(80));
        EditorGUILayout.LabelField(info.fileSizeReadable, GUILayout.Width(70));

        // AA 归属（彩色显示）
        var oldColor = GUI.color;
        GUI.color = info.isInAddressables ? new Color(0.6f, 1f, 0.6f) : new Color(1f, 0.6f, 0.6f);
        EditorGUILayout.LabelField(info.isInAddressables ? info.aaGroup : "非AA", GUILayout.Width(120));
        GUI.color = oldColor;

        EditorGUILayout.LabelField(info.aaAddress ?? "-", GUILayout.Width(150));
        EditorGUILayout.LabelField(info.aaLabels.Count > 0 ? string.Join(",", info.aaLabels) : "-", GUILayout.Width(150));

        EditorGUILayout.EndHorizontal();
    }

    private List<DependencyInfo> ApplyFilter(List<DependencyInfo> source)
    {
        var result = source;
        switch (filterMode)
        {
            case FilterMode.InAddressables:
                result = result.Where(d => d.isInAddressables).ToList();
                break;
            case FilterMode.NotInAddressables:
                result = result.Where(d => !d.isInAddressables).ToList();
                break;
        }

        if (typeFilter != "全部")
            result = result.Where(d => d.typeName == typeFilter).ToList();

        if (groupFilter == "(非AA)")
            result = result.Where(d => !d.isInAddressables).ToList();
        else if (groupFilter != "全部")
            result = result.Where(d => d.isInAddressables && d.aaGroup == groupFilter).ToList();

        if (labelFilter == "(无标签)")
            result = result.Where(d => d.isInAddressables && d.aaLabels.Count == 0).ToList();
        else if (labelFilter != "全部")
            result = result.Where(d => d.isInAddressables && d.aaLabels.Contains(labelFilter)).ToList();

        if (!string.IsNullOrEmpty(pathKeyword))
            result = result.Where(d => d.assetPath.IndexOf(pathKeyword, StringComparison.OrdinalIgnoreCase) >= 0).ToList();

        return result;
    }

    #endregion

    #region 分析逻辑

    private void AnalyzeAll()
    {
        dependencies.Clear();
        dependencyMap.Clear();
        allTypes.Clear();
        RefreshAACache();

        var targetPaths = new HashSet<string>();
        if (useBatchMode)
        {
            foreach (var obj in batchTargets)
            {
                if (obj == null) continue;
                string p = AssetDatabase.GetAssetPath(obj);
                if (!string.IsNullOrEmpty(p)) targetPaths.Add(p);
            }
        }
        else
        {
            if (targetAsset != null)
            {
                string p = AssetDatabase.GetAssetPath(targetAsset);
                if (!string.IsNullOrEmpty(p)) targetPaths.Add(p);
            }
        }

        if (targetPaths.Count == 0)
        {
            EditorUtility.DisplayDialog("提示", "请先选择目标资源。", "确定");
            return;
        }

        try
        {
            EditorUtility.DisplayProgressBar("分析依赖", "正在收集依赖资源...", 0f);

            int idx = 0;
            foreach (string path in targetPaths)
            {
                EditorUtility.DisplayProgressBar("分析依赖", $"处理 {path}", (float)idx / targetPaths.Count);
                AnalyzeSingle(path);
                idx++;
            }

            // 收集类型列表
            allTypes = dependencies.Select(d => d.typeName).Distinct().OrderBy(t => t).ToList();

            EditorUtility.ClearProgressBar();
            Log($"[依赖分析器] 分析完成，共 {dependencies.Count} 个依赖资源");
        }
        catch (Exception e)
        {
            EditorUtility.ClearProgressBar();
            LogError($"[依赖分析器] 分析失败: {e}");
        }
    }

    private void AnalyzeSingle(string assetPath)
    {
        if (string.IsNullOrEmpty(assetPath)) return;

        // 自身也作为一项
        AddDependencyInfo(assetPath);

        if (!deepAnalyze) return;

        string[] deps = AssetDatabase.GetDependencies(assetPath, true);
        foreach (var dep in deps)
        {
            AddDependencyInfo(dep);
        }
    }

    private void AddDependencyInfo(string assetPath)
    {
        if (dependencyMap.ContainsKey(assetPath)) return;

        if (!includeScripts && assetPath.EndsWith(".cs", StringComparison.OrdinalIgnoreCase))
            return;

        // 过滤 Editor 仅资源
        if (assetPath.StartsWith("Packages/", StringComparison.OrdinalIgnoreCase))
            return;

        var info = new DependencyInfo
        {
            assetPath = assetPath,
            guid = AssetDatabase.AssetPathToGUID(assetPath)
        };

        var mainAsset = AssetDatabase.LoadAssetAtPath<UnityEngine.Object>(assetPath);
        if (mainAsset != null)
        {
            info.type = mainAsset.GetType();
            info.typeName = info.type.Name;
        }
        else
        {
            info.typeName = Path.GetExtension(assetPath).TrimStart('.');
        }

        // 文件大小
        try
        {
            string fullPath = Path.Combine(Directory.GetParent(Application.dataPath).FullName, assetPath);
            if (File.Exists(fullPath))
            {
                var fi = new FileInfo(fullPath);
                info.fileSizeBytes = fi.Length;
                info.fileSizeReadable = FormatSize(info.fileSizeBytes);
            }
            else
            {
                info.fileSizeBytes = 0;
                info.fileSizeReadable = "-";
            }
        }
        catch
        {
            info.fileSizeBytes = 0;
            info.fileSizeReadable = "-";
        }

        // AA 信息
        if (aaSettings != null && !string.IsNullOrEmpty(info.guid))
        {
            var entry = aaSettings.FindAssetEntry(info.guid);
            if (entry != null)
            {
                info.isInAddressables = true;
                info.aaAddress = entry.address;
                info.aaGroup = entry.parentGroup != null ? entry.parentGroup.Name : "(未知)";
                info.aaLabels = entry.labels.ToList();
            }
        }

        dependencies.Add(info);
        dependencyMap[assetPath] = info;
    }

    #endregion

    #region 反向查找

    private void ReverseLookupSelected()
    {
        if (aaSettings == null)
        {
            EditorUtility.DisplayDialog("提示", "Addressables 未初始化。", "确定");
            return;
        }

        var selected = Selection.objects;
        if (selected == null || selected.Length == 0)
        {
            EditorUtility.DisplayDialog("提示", "请先在 Project 视图中选择目标资源。", "确定");
            return;
        }

        reverseRefMap.Clear();
        var targetGuids = new HashSet<string>();
        foreach (var obj in selected)
        {
            string p = AssetDatabase.GetAssetPath(obj);
            if (!string.IsNullOrEmpty(p))
            {
                string g = AssetDatabase.AssetPathToGUID(p);
                if (!string.IsNullOrEmpty(g)) targetGuids.Add(g);
            }
        }

        try
        {
            EditorUtility.DisplayProgressBar("反向查找", "正在遍历 AA 条目...", 0f);

            var allEntries = aaSettings.groups.SelectMany(g => g.entries).ToList();
            int idx = 0;
            int matched = 0;
            foreach (var entry in allEntries)
            {
                idx++;
                if (idx % 50 == 0)
                    EditorUtility.DisplayProgressBar("反向查找", $"扫描 {idx}/{allEntries.Count}", (float)idx / allEntries.Count);

                string entryPath = AssetDatabase.GUIDToAssetPath(entry.guid);
                if (string.IsNullOrEmpty(entryPath)) continue;

                string[] deps = AssetDatabase.GetDependencies(entryPath, true);
                foreach (var dep in deps)
                {
                    string depGuid = AssetDatabase.AssetPathToGUID(dep);
                    if (targetGuids.Contains(depGuid))
                    {
                        if (!reverseRefMap.ContainsKey(dep))
                            reverseRefMap[dep] = new List<string>();
                        if (!reverseRefMap[dep].Contains(entryPath))
                            reverseRefMap[dep].Add(entryPath);
                        matched++;
                    }
                }
            }

            EditorUtility.ClearProgressBar();

            var sb = new StringBuilder();
            sb.AppendLine($"反向查找完成，命中 {matched} 处引用。");
            sb.AppendLine();
            foreach (var kv in reverseRefMap)
            {
                sb.AppendLine($"【目标】{kv.Key}");
                foreach (var refPath in kv.Value)
                {
                    string refGuid = AssetDatabase.AssetPathToGUID(refPath);
                    var refEntry = aaSettings.FindAssetEntry(refGuid);
                    string aaInfo = refEntry != null
                        ? $"[AA] {refEntry.parentGroup.Name} / {refEntry.address}"
                        : "[非AA]";
                    sb.AppendLine($"    ← {refPath}  {aaInfo}");
                }
                sb.AppendLine();
            }

            string savePath = EditorUtility.SaveFilePanel("保存反向查找报告", Application.dataPath, "ReverseLookupReport", "txt");
            if (!string.IsNullOrEmpty(savePath))
            {
                File.WriteAllText(savePath, sb.ToString(), Encoding.UTF8);
                EditorUtility.DisplayDialog("完成", $"报告已保存到:\n{savePath}", "确定");
            }
            else
            {
                Log(sb.ToString());
            }
        }
        catch (Exception e)
        {
            EditorUtility.ClearProgressBar();
            LogError($"[依赖分析器] 反向查找失败: {e}");
        }
    }

    #endregion

    #region 导出报告

    private void ExportReport()
    {
        if (dependencies.Count == 0)
        {
            EditorUtility.DisplayDialog("提示", "请先分析依赖。", "确定");
            return;
        }

        string savePath = EditorUtility.SaveFilePanel("导出依赖报告", Application.dataPath, "DependencyReport", "csv");
        if (string.IsNullOrEmpty(savePath)) return;

        var sb = new StringBuilder();
        sb.AppendLine("AssetPath,GUID,Type,Size,IsInAA,AAGroup,AAAddress,AALabels");

        foreach (var info in dependencies)
        {
            sb.AppendLine(string.Join(",",
                EscapeCsv(info.assetPath),
                info.guid,
                info.typeName,
                info.fileSizeBytes,
                info.isInAddressables,
                EscapeCsv(info.aaGroup ?? ""),
                EscapeCsv(info.aaAddress ?? ""),
                EscapeCsv(string.Join(";", info.aaLabels))));
        }

        File.WriteAllText(savePath, sb.ToString(), Encoding.UTF8);
        EditorUtility.DisplayDialog("完成", $"报告已导出到:\n{savePath}", "确定");
        Log($"[依赖分析器] 报告已导出: {savePath}");
    }

    private string EscapeCsv(string s)
    {
        if (string.IsNullOrEmpty(s)) return "";
        if (s.Contains(",") || s.Contains("\"") || s.Contains("\n"))
        {
            return "\"" + s.Replace("\"", "\"\"") + "\"";
        }
        return s;
    }

    #endregion

    #region 复制地址

    private void CopySelectedAddresses()
    {
        var filtered = GetFilteredCache();
        var selected = filtered.Where(d =>
            Selection.objects != null &&
            Selection.objects.Any(o => o != null && AssetDatabase.GetAssetPath(o) == d.assetPath))
            .ToList();

        if (selected.Count == 0)
        {
            EditorUtility.DisplayDialog("提示", "请先在下方列表勾选资源。", "确定");
            return;
        }

        var sb = new StringBuilder();
        foreach (var info in selected)
        {
            sb.AppendLine(info.aaAddress ?? info.assetPath);
        }
        GUIUtility.systemCopyBuffer = sb.ToString();
        Log($"[依赖分析器] 已复制 {selected.Count} 条地址到剪贴板");
    }

    #endregion

    #region 加入AA

    private void AddSelectedToAddressables()
    {
        if (aaSettings == null)
        {
            EditorUtility.DisplayDialog("错误", "Addressables 未初始化。", "确定");
            return;
        }

        var filtered = GetFilteredCache();
        var selected = filtered.Where(d =>
            Selection.objects != null &&
            Selection.objects.Any(o => o != null && AssetDatabase.GetAssetPath(o) == d.assetPath))
            .ToList();

        if (selected.Count == 0)
        {
            EditorUtility.DisplayDialog("提示", "请先在下方列表勾选资源。", "确定");
            return;
        }

        // 选择 Group
        var groupNames = aaSettings.groups.Where(g => g != null).Select(g => g.Name).ToArray();
        int choice = EditorUtility.DisplayDialogComplex(
            "选择目标 Group",
            $"将 {selected.Count} 个资源添加到哪个 Group？",
            groupNames.Length > 0 ? groupNames[0] : "Default",
            groupNames.Length > 1 ? groupNames[1] : "Cancel",
            groupNames.Length > 2 ? "其他..." : "Cancel");

        if (choice == 2)
        {
            // 弹出菜单选择
            var menu = new GenericMenu();
            foreach (var gn in groupNames)
            {
                var captured = gn;
                menu.AddItem(new GUIContent(gn), false, () => DoAddToGroup(selected, captured));
            }
            menu.ShowAsContext();
            return;
        }
        else if (choice >= 0 && choice < groupNames.Length)
        {
            DoAddToGroup(selected, groupNames[choice]);
        }
    }

    private void DoAddToGroup(List<DependencyInfo> list, string groupName)
    {
        var group = aaSettings.groups.FirstOrDefault(g => g != null && g.Name == groupName);
        if (group == null)
        {
            EditorUtility.DisplayDialog("错误", $"找不到 Group: {groupName}", "确定");
            return;
        }

        int count = 0;
        var errors = new List<string>();
        foreach (var info in list)
        {
            if (string.IsNullOrEmpty(info.guid))
            {
                errors.Add($"{info.assetPath}: GUID 为空");
                continue;
            }

            var entry = aaSettings.FindAssetEntry(info.guid);
            if (entry == null)
                entry = aaSettings.CreateOrMoveEntry(info.guid, group);

            if (entry == null)
            {
                errors.Add($"{info.assetPath}: 创建条目失败");
                continue;
            }

            // 默认 address 用文件名
            if (string.IsNullOrEmpty(entry.address) || entry.address == info.guid)
                entry.address = Path.GetFileNameWithoutExtension(info.assetPath);

            count++;
        }

        aaSettings.SetDirty(AddressableAssetSettings.ModificationEvent.EntryMoved, null, true);
        AssetDatabase.SaveAssets();

        // 重新分析刷新
        AnalyzeAll();

        string msg = $"成功: {count} 个";
        if (errors.Count > 0) msg += $"\n失败 {errors.Count} 个:\n" + string.Join("\n", errors);
        EditorUtility.DisplayDialog("加入AA完成", msg, "确定");
    }

    #endregion

    #region 工具

    private static string FormatSize(long bytes)
    {
        if (bytes < 1024) return bytes + " B";
        if (bytes < 1024 * 1024) return (bytes / 1024.0).ToString("F1") + " KB";
        if (bytes < 1024 * 1024 * 1024) return (bytes / (1024.0 * 1024)).ToString("F2") + " MB";
        return (bytes / (1024.0 * 1024 * 1024)).ToString("F2") + " GB";
    }

    #endregion
}