using System;
using System.Collections.Generic;
using UnityEditor;
using UnityEditor.UIElements;
using UnityEngine;
using UnityEngine.InputSystem;
using UnityEngine.UIElements;
using BaseGames.Editor;
using BaseGames.UI;

namespace BaseGames.Editor.Input
{
    /// <summary>
    /// 按键图标管理工作台（Input Icon Studio）。
    ///
    /// 布局：
    ///   工具栏  (InputReaderSO 选取 + 刷新按钮)
    ///   设备标签栏 (键鼠 / Xbox / PlayStation / Switch)
    ///   TwoPaneSplitView:
    ///     左列：Action 列表（带覆盖指示点 + 当前绑定路径预览）
    ///     右列：
    ///       ① 当前 Action × 当前设备的绑定路径 + Sprite 字段
    ///       ② 48px 大图预览
    ///       ③ 所有设备快览行（4 行）
    ///       ④ 模拟 InteractPromptWidget 外观预览
    ///
    /// 菜单：BaseGames / Input Icon Studio (priority=55)
    /// </summary>
    public class InputIconStudioWindow : EditorWindow
    {
        private const string UssPath    = "Assets/_Game/Scripts/Editor/UIToolkit/Editor.uss";
        private const string PrefDevice = "InputIconStudio.Device";
        private const string PrefAction = "InputIconStudio.Action";
        private const float  ListWidth  = 280f;

        // ── 静态开口 ──────────────────────────────────────────────────────────

        [MenuItem("BaseGames/Input Icon Studio", priority = 55)]
        public static void Open()
        {
            var wnd = GetWindow<InputIconStudioWindow>();
            wnd.titleContent = new GUIContent("Input Icon Studio",
                EditorGUIUtility.IconContent("d_PreTextureRGB").image);
            wnd.minSize = new Vector2(780, 480);
        }

        // ── 数据 ──────────────────────────────────────────────────────────────

        private ScriptableObject     _inputReaderAsset;
        private InputActionAsset     _actionAsset;

        // 四套图标集 SO（每个设备一套，可为 null）
        private InputDeviceIconSetSO _kbSet, _xboxSet, _psSet, _switchSet;

        // 当前激活设备标签
        private InputDeviceType      _activeDevice  = InputDeviceType.KeyboardMouse;
        // 当前选中的 Action 名称
        private string               _selectedAction;

        // 缓存所有 actions（仅 Gameplay map）
        private readonly List<string> _actionNames = new();

        // ── UI 节点引用 ───────────────────────────────────────────────────────

        private VisualElement _listContainer;
        private VisualElement _detailPanel;
        private VisualElement _deviceTabBar;

        // ── 生命周期 ──────────────────────────────────────────────────────────

        public void CreateGUI()
        {
            var uss = AssetDatabase.LoadAssetAtPath<StyleSheet>(UssPath);
            if (uss != null) rootVisualElement.styleSheets.Add(uss);

            rootVisualElement.style.flexDirection = FlexDirection.Column;
            rootVisualElement.style.flexGrow      = 1;

            // 恢复上次选中状态
            _activeDevice  = (InputDeviceType)EditorPrefs.GetInt(PrefDevice, 0);
            _selectedAction = EditorPrefs.GetString(PrefAction, null);

            BuildToolbar();
            BuildDeviceTabBar();
            BuildMainSplit();

            LoadAssetsFromProject();
        }

        private void OnDisable()
        {
            EditorPrefs.SetInt(PrefDevice, (int)_activeDevice);
            EditorPrefs.SetString(PrefAction, _selectedAction ?? string.Empty);
        }

        // ── 工具栏 ────────────────────────────────────────────────────────────

        private void BuildToolbar()
        {
            var toolbar = new VisualElement();
            toolbar.AddToClassList("editor-toolbar");

            // 标题图标
            var icon = EditorGUIUtility.IconContent("d_PreTextureRGB");
            if (icon.image != null)
            {
                var iconImg = new Image { image = icon.image };
                iconImg.style.width  = 18;
                iconImg.style.height = 18;
                iconImg.style.marginRight = 6;
                toolbar.Add(iconImg);
            }

            var title = new Label("INPUT ICON STUDIO");
            title.style.unityFontStyleAndWeight = FontStyle.Bold;
            title.style.fontSize   = 12;
            title.style.opacity    = 0.85f;
            title.style.marginRight = 12;
            toolbar.Add(title);

            // InputReaderSO 选取器
            var readerLabel = new Label("InputReaderSO:");
            readerLabel.style.opacity    = 0.65f;
            readerLabel.style.marginRight = 4;
            readerLabel.style.alignSelf   = Align.Center;
            toolbar.Add(readerLabel);

            var readerField = new ObjectField
            {
                objectType         = typeof(ScriptableObject),
                allowSceneObjects  = false,
                value              = _inputReaderAsset
            };
            readerField.style.width    = 200;
            readerField.style.flexShrink = 0;
            readerField.RegisterValueChangedCallback(evt =>
            {
                _inputReaderAsset = evt.newValue as ScriptableObject;
                ReloadActionAsset();
                RebuildActionList();
                RebuildDetail();
            });
            toolbar.Add(readerField);

            // 弹性填充
            var spacer = new VisualElement();
            spacer.style.flexGrow = 1;
            toolbar.Add(spacer);

            // 刷新按钮
            var btnRefresh = new Button(RefreshAll) { text = "⟳ 刷新" };
            btnRefresh.tooltip = "重新扫描项目资产";
            toolbar.Add(btnRefresh);

            // 帮助按钮
            var btnHelp = new Button(ShowHelp) { text = "?" };
            btnHelp.style.width   = 24;
            btnHelp.tooltip = "使用说明";
            toolbar.Add(btnHelp);

            rootVisualElement.Add(toolbar);
        }

        // ── 设备标签栏 ────────────────────────────────────────────────────────

        private void BuildDeviceTabBar()
        {
            _deviceTabBar = new VisualElement();
            _deviceTabBar.AddToClassList("tab-bar");
            _deviceTabBar.style.paddingLeft  = 8;
            _deviceTabBar.style.paddingRight = 8;
            rootVisualElement.Add(_deviceTabBar);
            RebuildDeviceTabs();
        }

        private void RebuildDeviceTabs()
        {
            _deviceTabBar.Clear();

            var devices = new[]
            {
                (InputDeviceType.KeyboardMouse,       "🖱 键鼠",       "(W/A/S/D + Mouse)"),
                (InputDeviceType.XboxController,      "🎮 Xbox",       "Xbox Controller"),
                (InputDeviceType.PlayStationController,"🎮 PlayStation","DualShock / DualSense"),
                (InputDeviceType.SwitchController,    "🕹 Switch",     "Pro Controller / Joy-Con"),
            };

            foreach (var (devType, label, hint) in devices)
            {
                var iconSet = GetIconSetForDevice(devType);
                int total   = GetEntryCount(iconSet);
                int filled  = GetFilledCount(iconSet);

                // 覆盖率圆点颜色
                var dot = total > 0 && filled == total ? "●" : (filled == 0 ? "○" : "◑");
                var dotColor = total > 0 && filled == total
                    ? new Color(0.3f, 0.85f, 0.45f)
                    : filled == 0
                        ? new Color(0.8f, 0.3f, 0.3f)
                        : new Color(0.9f, 0.75f, 0.2f);

                var btn = new Button(() => SelectDevice(devType));
                btn.tooltip = hint;
                btn.style.flexDirection = FlexDirection.Row;
                btn.style.alignItems    = Align.Center;
                btn.AddToClassList("tab-button");

                var dotLbl = new Label(dot);
                dotLbl.style.color       = new StyleColor(dotColor);
                dotLbl.style.fontSize    = 10;
                dotLbl.style.marginRight = 4;
                btn.Add(dotLbl);

                var nameLbl = new Label(label);
                btn.Add(nameLbl);

                if (total > 0)
                {
                    var countLbl = new Label($" {filled}/{total}");
                    countLbl.style.fontSize = 10;
                    countLbl.style.opacity  = 0.55f;
                    btn.Add(countLbl);
                }

                if (devType == _activeDevice)
                    btn.AddToClassList("tab-button--active");

                _deviceTabBar.Add(btn);
            }
        }

        private void SelectDevice(InputDeviceType device)
        {
            _activeDevice = device;
            RebuildDeviceTabs();
            RebuildActionList();
            RebuildDetail();
        }

        // ── 主分屏 ────────────────────────────────────────────────────────────

        private void BuildMainSplit()
        {
            var split = new TwoPaneSplitView(0, ListWidth, TwoPaneSplitViewOrientation.Horizontal);
            split.style.flexGrow = 1;
            rootVisualElement.Add(split);

            // ── 左：Action 列表 ────────────────────────────────────────────
            var leftPane = new VisualElement();
            leftPane.style.flexDirection = FlexDirection.Column;
            split.Add(leftPane);

            // 左列标题
            var leftHeader = new VisualElement();
            leftHeader.AddToClassList("pane-header");
            leftHeader.style.flexDirection = FlexDirection.Row;
            leftHeader.style.alignItems    = Align.Center;

            var leftTitle = new Label("Actions");
            leftTitle.style.flexGrow = 1;
            leftHeader.Add(leftTitle);

            var btnSetAsset = new Button(PickIconSetForCurrentDevice)
            {
                text    = "📂 指定图标集",
                tooltip = "为当前设备绑定一个 InputDeviceIconSetSO 资产"
            };
            btnSetAsset.style.fontSize   = 10;
            btnSetAsset.style.height     = 20;
            leftHeader.Add(btnSetAsset);
            leftPane.Add(leftHeader);

            // 左列滚动区
            var leftScroll = new ScrollView(ScrollViewMode.Vertical);
            leftScroll.style.flexGrow = 1;
            leftPane.Add(leftScroll);

            _listContainer = new VisualElement();
            _listContainer.style.paddingTop    = 4;
            _listContainer.style.paddingBottom = 4;
            leftScroll.Add(_listContainer);

            // ── 右：详情区 ─────────────────────────────────────────────────
            var rightScroll = new ScrollView(ScrollViewMode.Vertical);
            rightScroll.style.flexGrow = 1;
            split.Add(rightScroll);

            _detailPanel = new VisualElement();
            _detailPanel.style.flexDirection = FlexDirection.Column;
            _detailPanel.style.paddingBottom = 16;
            rightScroll.Add(_detailPanel);
        }

        // ── Action 列表 ───────────────────────────────────────────────────────

        private void RebuildActionList()
        {
            if (_listContainer == null) return;
            _listContainer.Clear();

            if (_actionNames.Count == 0)
            {
                var empty = new Label("未加载 Action Asset\n请在上方指定 InputReaderSO");
                empty.style.opacity     = 0.5f;
                empty.style.marginTop   = 20;
                empty.style.whiteSpace  = WhiteSpace.Normal;
                empty.style.unityTextAlign = TextAnchor.MiddleCenter;
                _listContainer.Add(empty);
                return;
            }

            var iconSet = GetIconSetForDevice(_activeDevice);

            foreach (var actionName in _actionNames)
            {
                var effectivePath = GetEffectivePath(actionName);
                var sprite        = iconSet?.GetIcon(effectivePath ?? string.Empty);
                bool hasIcon      = sprite != null;

                var row = new Button(() =>
                {
                    _selectedAction = actionName;
                    RebuildActionListSelection();
                    RebuildDetail();
                });
                row.style.flexDirection  = FlexDirection.Row;
                row.style.alignItems     = Align.Center;
                row.style.paddingLeft    = 10;
                row.style.paddingRight   = 8;
                row.style.paddingTop     = 6;
                row.style.paddingBottom  = 6;
                row.style.borderRadius(0);
                row.style.borderWidth(0);
                row.style.marginBottom   = 1;
                row.style.backgroundColor = _selectedAction == actionName
                    ? new StyleColor(new Color(0.35f, 0.55f, 0.85f, 0.22f))
                    : new StyleColor(Color.clear);

                // 覆盖指示点
                var dot = new Label(hasIcon ? "●" : "○");
                dot.style.color     = new StyleColor(hasIcon ? new Color(0.3f, 0.85f, 0.4f) : new Color(0.75f, 0.3f, 0.3f));
                dot.style.fontSize  = 10;
                dot.style.width     = 14;
                dot.style.flexShrink = 0;
                row.Add(dot);

                // Action 名称
                var nameLbl = new Label(actionName);
                nameLbl.style.flexGrow = 1;
                nameLbl.style.fontSize = 11;
                row.Add(nameLbl);

                // 缩略绑定路径
                if (!string.IsNullOrEmpty(effectivePath))
                {
                    var pathLbl = new Label(ShortPath(effectivePath));
                    pathLbl.style.fontSize  = 10;
                    pathLbl.style.opacity   = 0.5f;
                    pathLbl.style.marginLeft = 4;
                    row.Add(pathLbl);
                }

                // 微型图标预览
                if (sprite != null)
                {
                    var thumb = new Image { sprite = sprite };
                    thumb.style.width  = 18;
                    thumb.style.height = 18;
                    thumb.style.marginLeft = 4;
                    thumb.style.flexShrink = 0;
                    row.Add(thumb);
                }

                row.name = "action-row-" + actionName;
                _listContainer.Add(row);
            }
        }

        private void RebuildActionListSelection()
        {
            if (_listContainer == null) return;
            foreach (var child in _listContainer.Children())
            {
                if (child is not Button btn) continue;
                var isSelected = btn.name == "action-row-" + _selectedAction;
                btn.style.backgroundColor = isSelected
                    ? new StyleColor(new Color(0.35f, 0.55f, 0.85f, 0.22f))
                    : new StyleColor(Color.clear);
            }
        }

        // ── 详情面板 ──────────────────────────────────────────────────────────

        private void RebuildDetail()
        {
            if (_detailPanel == null) return;
            _detailPanel.Clear();

            if (string.IsNullOrEmpty(_selectedAction))
            {
                var placeholder = new Label("← 从左侧选择一个 Action");
                placeholder.style.opacity   = 0.4f;
                placeholder.style.marginTop = 60;
                placeholder.style.unityTextAlign = TextAnchor.MiddleCenter;
                _detailPanel.Add(placeholder);
                return;
            }

            // ① 标题栏
            BuildDetailHeader();
            // ② 当前设备 Mapping 编辑区
            BuildCurrentDeviceMapping();
            // ③ 所有设备快览
            BuildAllDevicesOverview();
            // ④ 交互提示模拟预览
            BuildPromptPreview();
            // ⑤ 图标集资产状态
            BuildIconSetStatus();
        }

        private void BuildDetailHeader()
        {
            var header = new VisualElement();
            header.style.flexDirection   = FlexDirection.Row;
            header.style.alignItems      = Align.Center;
            header.style.paddingLeft     = 12;
            header.style.paddingRight    = 12;
            header.style.paddingTop      = 10;
            header.style.paddingBottom   = 10;
            header.style.borderBottomWidth = 1;
            header.style.borderBottomColor = new StyleColor(new Color(0.5f, 0.5f, 0.5f, 0.25f));

            var actionLbl = new Label(_selectedAction);
            actionLbl.style.fontSize = 15;
            actionLbl.style.unityFontStyleAndWeight = FontStyle.Bold;
            actionLbl.style.flexGrow = 1;
            header.Add(actionLbl);

            // 当前设备徽章
            var devBadge = MakeDeviceBadge(_activeDevice);
            header.Add(devBadge);

            _detailPanel.Add(header);
        }

        private void BuildCurrentDeviceMapping()
        {
            var section = MakeSectionContainer("绑定路径与图标");

            var iconSet = GetIconSetForDevice(_activeDevice);
            var effectivePath = GetEffectivePath(_selectedAction);

            // ── 绑定路径预览 ──────────────────────────────────────────────
            var pathRow = new VisualElement();
            pathRow.style.flexDirection = FlexDirection.Row;
            pathRow.style.alignItems    = Align.Center;
            pathRow.style.marginBottom  = 8;

            var pathLabel = new Label("绑定路径");
            pathLabel.style.opacity   = 0.65f;
            pathLabel.style.width     = 80;
            pathLabel.style.flexShrink = 0;
            pathRow.Add(pathLabel);

            var pathValue = new Label(effectivePath ?? "(未检测到绑定)");
            pathValue.style.fontSize     = 11;
            pathValue.style.flexGrow     = 1;
            pathValue.style.opacity      = string.IsNullOrEmpty(effectivePath) ? 0.4f : 1f;
            pathValue.style.unityFontStyleAndWeight = FontStyle.Bold;
            pathRow.Add(pathValue);

            if (!string.IsNullOrEmpty(effectivePath))
            {
                var copyBtn = new Button(() => { GUIUtility.systemCopyBuffer = effectivePath; })
                { text = "复制", tooltip = "复制路径到剪贴板" };
                copyBtn.style.height  = 20;
                copyBtn.style.fontSize = 10;
                pathRow.Add(copyBtn);
            }
            section.Add(pathRow);

            // ── 图标集 SO 字段 + 大图预览 ─────────────────────────────────
            if (iconSet == null)
            {
                var warn = new HelpBox($"当前设备（{DeviceLabel(_activeDevice)}）尚未配置图标集 SO。\n" +
                                       "请在工具栏 InputIconService 的 Inspector 中指定对应图标集，或点击左列「指定图标集」。",
                                       HelpBoxMessageType.Warning);
                warn.style.marginTop = 4;
                section.Add(warn);
            }
            else
            {
                var iconEditRow = new VisualElement();
                iconEditRow.style.flexDirection = FlexDirection.Row;
                iconEditRow.style.alignItems    = Align.Center;

                // 图标 ObjectField
                var existingSprite = string.IsNullOrEmpty(effectivePath)
                    ? null
                    : iconSet.GetIcon(effectivePath);

                var spriteField = new ObjectField("图标 Sprite")
                {
                    objectType        = typeof(Sprite),
                    allowSceneObjects = false,
                    value             = existingSprite
                };
                spriteField.style.flexGrow = 1;

                // 大图预览
                var bigPreview = new Image();
                bigPreview.style.width   = 64;
                bigPreview.style.height  = 64;
                bigPreview.style.marginLeft  = 12;
                bigPreview.style.flexShrink  = 0;
                bigPreview.style.borderRadius(4);
                bigPreview.style.backgroundColor = new StyleColor(new Color(0f, 0f, 0f, 0.25f));
                bigPreview.scaleMode = ScaleMode.ScaleToFit;
                if (existingSprite != null) bigPreview.sprite = existingSprite;

                spriteField.RegisterValueChangedCallback(evt =>
                {
                    if (string.IsNullOrEmpty(effectivePath)) return;
                    SaveIconToSet(iconSet, effectivePath, evt.newValue as Sprite);
                    bigPreview.sprite = evt.newValue as Sprite;
                    RebuildDeviceTabs();
                    RebuildActionListSelection();
                });

                iconEditRow.Add(spriteField);
                iconEditRow.Add(bigPreview);
                section.Add(iconEditRow);

                // 提示：若路径为空，说明该 Action 在此设备方案下无绑定
                if (string.IsNullOrEmpty(effectivePath))
                {
                    var note = new HelpBox("该 Action 在此控制方案下没有绑定。如有需要，请在 InputActionAsset 中添加对应的 Binding。",
                                           HelpBoxMessageType.Info);
                    note.style.marginTop = 4;
                    section.Add(note);
                }
            }

            _detailPanel.Add(section);
        }

        private void BuildAllDevicesOverview()
        {
            var section = MakeSectionContainer("所有设备快览");

            var devices = new[]
            {
                InputDeviceType.KeyboardMouse,
                InputDeviceType.XboxController,
                InputDeviceType.PlayStationController,
                InputDeviceType.SwitchController,
            };

            foreach (var devType in devices)
            {
                var iconSet = GetIconSetForDevice(devType);
                var path    = GetEffectivePath(_selectedAction);
                var sprite  = (iconSet != null && path != null) ? iconSet.GetIcon(path) : null;

                var row = new VisualElement();
                row.style.flexDirection  = FlexDirection.Row;
                row.style.alignItems     = Align.Center;
                row.style.paddingTop     = 4;
                row.style.paddingBottom  = 4;
                row.style.paddingLeft    = 6;
                row.style.paddingRight   = 6;
                row.style.borderBottomWidth = 1;
                row.style.borderBottomColor = new StyleColor(new Color(0.5f, 0.5f, 0.5f, 0.12f));

                // 设备徽章
                var badge = MakeDeviceBadge(devType);
                badge.style.width    = 110;
                badge.style.flexShrink = 0;
                row.Add(badge);

                // 绑定路径
                var pathLbl = new Label(path != null ? ShortPath(path) : "—");
                pathLbl.style.flexGrow  = 1;
                pathLbl.style.fontSize  = 10;
                pathLbl.style.opacity   = path == null ? 0.4f : 1f;
                row.Add(pathLbl);

                // 状态点
                var statusLbl = new Label(sprite != null ? "✓" : (iconSet == null ? "—" : "✗"));
                statusLbl.style.color  = new StyleColor(
                    sprite  != null ? new Color(0.3f, 0.85f, 0.4f) :
                    iconSet == null ? new Color(0.6f, 0.6f, 0.6f) :
                                     new Color(0.85f, 0.3f, 0.3f));
                statusLbl.style.width  = 20;
                statusLbl.style.unityTextAlign = TextAnchor.MiddleCenter;
                row.Add(statusLbl);

                // 小图预览
                var thumb = new Image();
                thumb.style.width   = 28;
                thumb.style.height  = 28;
                thumb.style.marginLeft = 6;
                thumb.style.flexShrink = 0;
                thumb.style.borderRadius(3);
                thumb.style.backgroundColor = new StyleColor(new Color(0f, 0f, 0f, 0.2f));
                thumb.scaleMode = ScaleMode.ScaleToFit;
                if (sprite != null) thumb.sprite = sprite;
                row.Add(thumb);

                section.Add(row);
            }

            _detailPanel.Add(section);
        }

        private void BuildPromptPreview()
        {
            var section = MakeSectionContainer("交互提示预览（模拟）");

            var iconSet       = GetIconSetForDevice(_activeDevice);
            var effectivePath = GetEffectivePath(_selectedAction);
            var sprite        = (iconSet != null && effectivePath != null) ? iconSet.GetIcon(effectivePath) : null;

            // 模拟 InteractPromptWidget 的外观
            var mockup = new VisualElement();
            mockup.style.flexDirection  = FlexDirection.Row;
            mockup.style.alignItems     = Align.Center;
            mockup.style.alignSelf      = Align.FlexStart;
            mockup.style.paddingTop     = 8;
            mockup.style.paddingBottom  = 8;
            mockup.style.paddingLeft    = 12;
            mockup.style.paddingRight   = 14;
            mockup.style.marginTop      = 4;
            mockup.style.marginLeft     = 8;
            mockup.style.borderRadius(6);
            mockup.style.backgroundColor = new StyleColor(new Color(0.08f, 0.08f, 0.10f, 0.85f));
            mockup.style.borderWidth(1);
            mockup.style.borderColor(new Color(0.5f, 0.5f, 0.6f, 0.35f));

            // 按键图标区域
            var keyBox = new VisualElement();
            keyBox.style.width  = 32;
            keyBox.style.height = 32;
            keyBox.style.borderRadius(4);
            keyBox.style.backgroundColor = new StyleColor(new Color(0.2f, 0.2f, 0.25f, 0.9f));
            keyBox.style.borderWidth(1);
            keyBox.style.borderColor(new Color(0.6f, 0.6f, 0.7f, 0.5f));
            keyBox.style.justifyContent = Justify.Center;
            keyBox.style.alignItems     = Align.Center;
            keyBox.style.marginRight    = 10;
            keyBox.style.flexShrink     = 0;

            if (sprite != null)
            {
                var keyImg = new Image { sprite = sprite };
                keyImg.style.width  = 24;
                keyImg.style.height = 24;
                keyImg.scaleMode    = ScaleMode.ScaleToFit;
                keyBox.Add(keyImg);
            }
            else
            {
                var missingLbl = new Label("?");
                missingLbl.style.opacity = 0.4f;
                missingLbl.style.unityTextAlign = TextAnchor.MiddleCenter;
                keyBox.Add(missingLbl);
            }
            mockup.Add(keyBox);

            // 文字区域
            var textCol = new VisualElement();
            textCol.style.flexDirection = FlexDirection.Column;

            var actionText = new Label("交互");      // 模拟 LabelText
            actionText.style.fontSize = 11;
            actionText.style.unityFontStyleAndWeight = FontStyle.Bold;
            actionText.style.color = new StyleColor(Color.white);
            textCol.Add(actionText);

            if (!string.IsNullOrEmpty(effectivePath))
            {
                var pathTip = new Label(ShortPath(effectivePath));
                pathTip.style.fontSize = 9;
                pathTip.style.opacity  = 0.5f;
                pathTip.style.color    = new StyleColor(Color.white);
                textCol.Add(pathTip);
            }
            mockup.Add(textCol);

            section.Add(mockup);

            if (sprite == null)
            {
                var note = new Label(iconSet == null
                    ? "ⓘ 当前设备未配置图标集，无法预览。"
                    : "ⓘ 该路径在图标集中未找到对应 Sprite，运行时图标区域将隐藏。");
                note.style.fontSize  = 10;
                note.style.opacity   = 0.55f;
                note.style.marginTop = 4;
                note.style.whiteSpace = WhiteSpace.Normal;
                section.Add(note);
            }

            _detailPanel.Add(section);
        }

        private void BuildIconSetStatus()
        {
            var section = MakeSectionContainer("图标集资产状态");

            var rows = new[]
            {
                (InputDeviceType.KeyboardMouse,        "键鼠",       _kbSet),
                (InputDeviceType.XboxController,       "Xbox",       _xboxSet),
                (InputDeviceType.PlayStationController,"PlayStation", _psSet),
                (InputDeviceType.SwitchController,     "Switch",     _switchSet),
            };

            foreach (var (devType, label, set) in rows)
            {
                var row = new VisualElement();
                row.style.flexDirection = FlexDirection.Row;
                row.style.alignItems    = Align.Center;
                row.style.marginBottom  = 3;

                var badge = MakeDeviceBadge(devType);
                badge.style.width    = 100;
                badge.style.flexShrink = 0;
                row.Add(badge);

                if (set != null)
                {
                    int total  = GetEntryCount(set);
                    int filled = GetFilledCount(set);

                    var statusChip = new Label($"{filled}/{total} 图标");
                    statusChip.AddToClassList(filled == total && total > 0 ? "status-chip--ok" : "status-chip--missing");
                    statusChip.style.fontSize   = 10;
                    statusChip.style.marginLeft = 8;
                    row.Add(statusChip);

                    var pingBtn = new Button(() => { EditorGUIUtility.PingObject(set); Selection.activeObject = set; })
                    { text = "定位", tooltip = $"在 Project 窗口中高亮 {set.name}" };
                    pingBtn.style.height   = 18;
                    pingBtn.style.fontSize = 10;
                    pingBtn.style.marginLeft = 6;
                    row.Add(pingBtn);
                }
                else
                {
                    var missingLbl = new Label("⚠ 未配置");
                    missingLbl.style.opacity   = 0.6f;
                    missingLbl.style.fontSize  = 10;
                    missingLbl.style.marginLeft = 8;
                    row.Add(missingLbl);

                    var createBtn = new Button(() => CreateIconSetForDevice(devType))
                    { text = "+ 新建", tooltip = $"创建 {label} 图标集 SO 并放入项目" };
                    createBtn.style.height   = 18;
                    createBtn.style.fontSize = 10;
                    createBtn.style.marginLeft = 6;
                    createBtn.AddToClassList("wizard-factory-btn");
                    row.Add(createBtn);
                }

                section.Add(row);
            }

            _detailPanel.Add(section);
        }

        // ── 加载项目资产 ──────────────────────────────────────────────────────

        private void LoadAssetsFromProject()
        {
            // 找 InputReaderSO
            if (_inputReaderAsset == null)
            {
                var guids = AssetDatabase.FindAssets("t:InputReaderSO");
                if (guids.Length > 0)
                    _inputReaderAsset = AssetDatabase.LoadAssetAtPath<ScriptableObject>(
                        AssetDatabase.GUIDToAssetPath(guids[0]));
            }

            ReloadActionAsset();
            LoadIconSets();
            RebuildDeviceTabs();
            RebuildActionList();
            RebuildDetail();
        }

        private void ReloadActionAsset()
        {
            _actionAsset = null;
            _actionNames.Clear();

            if (_inputReaderAsset == null) return;

            var so = new SerializedObject(_inputReaderAsset);
            var prop = so.FindProperty("_inputActions");
            if (prop?.objectReferenceValue is InputActionAsset asset)
            {
                _actionAsset = asset;
                var map = asset.FindActionMap("Gameplay", throwIfNotFound: false);
                if (map != null)
                    foreach (var action in map.actions)
                        _actionNames.Add(action.name);
            }
        }

        private void LoadIconSets()
        {
            var sets = EditorScaffoldUtils.FindAllAssetsOfType<InputDeviceIconSetSO>();
            _kbSet = _xboxSet = _psSet = _switchSet = null;

            // 按 DeviceType 字段匹配图标集 SO
            foreach (var set in sets)
            {
                switch (set.DeviceType)
                {
                    case InputDeviceType.KeyboardMouse:        _kbSet    ??= set; break;
                    case InputDeviceType.XboxController:       _xboxSet  ??= set; break;
                    case InputDeviceType.PlayStationController:_psSet    ??= set; break;
                    case InputDeviceType.SwitchController:     _switchSet??= set; break;
                }
            }
        }

        private void RefreshAll()
        {
            LoadAssetsFromProject();
        }

        // ── 每设备绑定路径查询 ────────────────────────────────────────────────

        private string GetEffectivePath(string actionName)
        {
            if (_actionAsset == null || string.IsNullOrEmpty(actionName)) return null;

            var action = _actionAsset.FindAction(actionName, throwIfNotFound: false);
            if (action == null) return null;

            string scheme = _activeDevice == InputDeviceType.KeyboardMouse ? "Keyboard&Mouse" : "Gamepad";

            foreach (var binding in action.bindings)
            {
                if (binding.isComposite) continue;
                if (!string.IsNullOrEmpty(scheme)
                    && !string.IsNullOrEmpty(binding.groups)
                    && !binding.groups.Contains(scheme, StringComparison.OrdinalIgnoreCase))
                    continue;
                if (!string.IsNullOrEmpty(binding.effectivePath))
                    return binding.effectivePath;
            }
            return null;
        }

        // ── 保存图标到 SO ─────────────────────────────────────────────────────

        private static void SaveIconToSet(InputDeviceIconSetSO iconSet, string path, Sprite sprite)
        {
            var so = new SerializedObject(iconSet);
            var entries = so.FindProperty("_entries");

            // 查找已有相同路径的条目
            int found = -1;
            for (int i = 0; i < entries.arraySize; i++)
            {
                var p = entries.GetArrayElementAtIndex(i).FindPropertyRelative("BindingPath").stringValue;
                if (string.Equals(p, path, StringComparison.OrdinalIgnoreCase))
                {
                    found = i;
                    break;
                }
            }

            if (found < 0)
            {
                // 新增
                entries.InsertArrayElementAtIndex(entries.arraySize);
                found = entries.arraySize - 1;
                entries.GetArrayElementAtIndex(found).FindPropertyRelative("BindingPath").stringValue = path;
            }

            entries.GetArrayElementAtIndex(found).FindPropertyRelative("Icon").objectReferenceValue = sprite;
            so.ApplyModifiedProperties();
            EditorUtility.SetDirty(iconSet);
            AssetDatabase.SaveAssets();
        }

        // ── 工具方法 ──────────────────────────────────────────────────────────

        private InputDeviceIconSetSO GetIconSetForDevice(InputDeviceType device) => device switch
        {
            InputDeviceType.KeyboardMouse        => _kbSet,
            InputDeviceType.XboxController       => _xboxSet,
            InputDeviceType.PlayStationController => _psSet,
            InputDeviceType.SwitchController     => _switchSet,
            _                                    => null,
        };

        private static int GetEntryCount(InputDeviceIconSetSO set)
        {
            if (set == null) return 0;
            var so  = new SerializedObject(set);
            var arr = so.FindProperty("_entries");
            return arr?.arraySize ?? 0;
        }

        private static int GetFilledCount(InputDeviceIconSetSO set)
        {
            if (set == null) return 0;
            var so  = new SerializedObject(set);
            var arr = so.FindProperty("_entries");
            if (arr == null) return 0;
            int count = 0;
            for (int i = 0; i < arr.arraySize; i++)
                if (arr.GetArrayElementAtIndex(i).FindPropertyRelative("Icon").objectReferenceValue != null)
                    count++;
            return count;
        }

        private void PickIconSetForCurrentDevice()
        {
            // 打开 Project 的 ObjectPicker 让用户选一个 InputDeviceIconSetSO
            // 简单实现：扫描项目中所有 InputDeviceIconSetSO，弹出通用 GenericMenu
            var all = EditorScaffoldUtils.FindAllAssetsOfType<InputDeviceIconSetSO>();
            if (all.Count == 0)
            {
                EditorUtility.DisplayDialog("无图标集资产",
                    "项目中未找到 InputDeviceIconSetSO 资产，请先创建。", "确定");
                return;
            }

            var menu = new GenericMenu();
            foreach (var set in all)
            {
                var captured = set;
                menu.AddItem(new GUIContent(set.name), false, () =>
                {
                    AssignIconSetToDevice(_activeDevice, captured);
                    LoadIconSets();
                    RebuildDeviceTabs();
                    RebuildActionList();
                    RebuildDetail();
                });
            }
            menu.AddSeparator("");
            menu.AddItem(new GUIContent("新建..."), false, () => CreateIconSetForDevice(_activeDevice));
            menu.ShowAsContext();
        }

        private void AssignIconSetToDevice(InputDeviceType device, InputDeviceIconSetSO set)
        {
            switch (device)
            {
                case InputDeviceType.KeyboardMouse:         _kbSet    = set; break;
                case InputDeviceType.XboxController:        _xboxSet  = set; break;
                case InputDeviceType.PlayStationController: _psSet    = set; break;
                case InputDeviceType.SwitchController:      _switchSet = set; break;
            }
        }

        private void CreateIconSetForDevice(InputDeviceType device)
        {
            string defaultName = $"ICN_{device}";
            var asset = EditorScaffoldUtils.CreateSOAssetInteractive<InputDeviceIconSetSO>(
                "Assets/_Game/Data/UI/InputIcons", defaultName);
            if (asset != null)
            {
                var so   = new SerializedObject(asset);
                var prop = so.FindProperty("_deviceType");
                if (prop != null) { prop.enumValueIndex = (int)device; so.ApplyModifiedProperties(); }
                AssignIconSetToDevice(device, asset);
                LoadIconSets();
                RebuildDeviceTabs();
                RebuildActionList();
                RebuildDetail();
            }
        }

        // ── UI 构建辅助 ───────────────────────────────────────────────────────

        private static VisualElement MakeSectionContainer(string title)
        {
            var section = new VisualElement();
            section.style.paddingLeft    = 12;
            section.style.paddingRight   = 12;
            section.style.paddingTop     = 10;
            section.style.paddingBottom  = 10;
            section.style.borderBottomWidth = 1;
            section.style.borderBottomColor = new StyleColor(new Color(0.5f, 0.5f, 0.5f, 0.18f));

            var hdr = new Label(title);
            hdr.AddToClassList("section-header");
            hdr.style.marginBottom = 6;
            section.Add(hdr);

            return section;
        }

        private static VisualElement MakeDeviceBadge(InputDeviceType device)
        {
            var (label, bg) = device switch
            {
                InputDeviceType.KeyboardMouse        => ("键鼠",       new Color(0.2f, 0.4f, 0.7f, 0.5f)),
                InputDeviceType.XboxController       => ("Xbox",       new Color(0.1f, 0.5f, 0.15f, 0.5f)),
                InputDeviceType.PlayStationController => ("PS",         new Color(0.1f, 0.25f, 0.65f, 0.5f)),
                InputDeviceType.SwitchController     => ("Switch",     new Color(0.75f, 0.15f, 0.2f, 0.5f)),
                _                                    => ("Unknown",    new Color(0.4f, 0.4f, 0.4f, 0.4f)),
            };

            var badge = new Label(label);
            badge.style.fontSize    = 10;
            badge.style.paddingTop  = 2;
            badge.style.paddingBottom = 2;
            badge.style.paddingLeft   = 7;
            badge.style.paddingRight  = 7;
            badge.style.borderRadius(4);
            badge.style.backgroundColor = new StyleColor(bg);
            badge.style.borderWidth(1);
            badge.style.borderColor(new Color(bg.r + 0.15f, bg.g + 0.15f, bg.b + 0.15f, 0.6f));
            badge.style.unityFontStyleAndWeight = FontStyle.Bold;
            return badge;
        }

        private static string DeviceLabel(InputDeviceType device) => device switch
        {
            InputDeviceType.KeyboardMouse        => "键鼠",
            InputDeviceType.XboxController       => "Xbox",
            InputDeviceType.PlayStationController => "PlayStation",
            InputDeviceType.SwitchController     => "Switch",
            _                                    => device.ToString(),
        };

        /// <summary>将完整绑定路径缩短为可读格式（去掉设备前缀）。</summary>
        private static string ShortPath(string path)
        {
            if (string.IsNullOrEmpty(path)) return path;
            var slash = path.LastIndexOf('/');
            return slash >= 0 ? path[(slash + 1)..] : path;
        }

        private static void ShowHelp()
        {
            EditorUtility.DisplayDialog("Input Icon Studio — 使用说明",
                "1. 在顶部选取 InputReaderSO 资产（项目中有唯一实例则自动加载）\n" +
                "2. 通过设备标签页切换键鼠/Xbox/PS/Switch\n" +
                "3. 左侧列表显示所有 Gameplay Actions：\n" +
                "   ● 绿色 = 当前设备已配置图标\n" +
                "   ○ 红色 = 未配置\n" +
                "4. 选中 Action 后在右侧指定 Sprite\n" +
                "5. 修改实时保存到对应的 InputDeviceIconSetSO\n\n" +
                "💡 在 Inspector 中可对 InputDeviceIconSetSO 使用「从 Action Asset 填充路径」\n" +
                "   批量生成所有路径条目，再逐一指定 Sprite。",
                "知道了");
        }
    }

    // ── 样式扩展方法（限本文件使用）─────────────────────────────────────────

    internal static class VisualElementStyleExtensions
    {
        internal static void borderRadius(this IStyle style, float r)
        {
            style.borderTopLeftRadius     = r;
            style.borderTopRightRadius    = r;
            style.borderBottomLeftRadius  = r;
            style.borderBottomRightRadius = r;
        }

        internal static void borderWidth(this IStyle style, float w)
        {
            style.borderLeftWidth   = w;
            style.borderRightWidth  = w;
            style.borderTopWidth    = w;
            style.borderBottomWidth = w;
        }

        internal static void borderColor(this IStyle style, Color c)
        {
            var sc = new StyleColor(c);
            style.borderLeftColor   = sc;
            style.borderRightColor  = sc;
            style.borderTopColor    = sc;
            style.borderBottomColor = sc;
        }

        internal static void borderRadius(this Button btn, float r)
            => btn.style.borderRadius(r);

        internal static void borderWidth(this Button btn, float w)
            => btn.style.borderWidth(w);
    }
}