using System;
using UnityEditor;
using UnityEditor.UIElements;
using UnityEngine;
using UnityEngine.UIElements;
using BaseGames.Equipment;

namespace BaseGames.Editor.Modules
{
    /// <summary>
    /// DataHub 护符模块 —— Tab 切换管理 CharmCatalogSO（目录）和 CharmSO（护符）资产。
    /// </summary>
    public class CharmModule : IDataModule
    {
        private const string CharmFolder   = "Assets/_Game/Data/Progression/Charms";
        private const string CatalogPrefix = "CHM_Catalog";
        private const string CharmPrefix   = "CHM_";

        public string ModuleId    => "charm";
        public string DisplayName => "护符";
        public string IconName    => null;

        private int _activeTab = 0; // 0 = 目录, 1 = 护符

        private SoListPane<CharmCatalogSO> _catalogPane;
        private SoListPane<CharmSO>        _charmPane;
        private Action<UnityEngine.Object> _onSelected;

        private DetailHeader   _header;
        private CharmCatalogSO _selectedCatalog;
        private CharmSO        _selectedCharm;

        public void Initialize()
        {
            _catalogPane = new SoListPane<CharmCatalogSO>(CharmFolder, CatalogPrefix);
            _catalogPane.SelectionChanged = s => { _selectedCatalog = s; _onSelected?.Invoke(s); };

            _charmPane = new SoListPane<CharmSO>(CharmFolder, CharmPrefix,
                c => $"{c.notchCost}格");
            _charmPane.SelectionChanged = s => { _selectedCharm = s; _onSelected?.Invoke(s); };
        }

        public void BuildListPane(VisualElement container, Action<UnityEngine.Object> onSelected)
        {
            _onSelected = onSelected;
            container.style.flexDirection = FlexDirection.Column;

            // Tab bar
            var tabBar = new VisualElement();
            tabBar.style.flexDirection     = FlexDirection.Row;
            tabBar.style.borderBottomWidth = 1;
            tabBar.style.borderBottomColor = new StyleColor(new Color(0.5f, 0.5f, 0.5f, 0.3f));
            container.Add(tabBar);

            var btnCatalog = BuildTabBtn("目录", 0, tabBar);
            var btnCharms  = BuildTabBtn("护符", 1, tabBar);

            var listArea = new VisualElement();
            listArea.style.flexGrow = 1;
            container.Add(listArea);

            var tabs = new[] { btnCatalog, btnCharms };
            ShowTab(0, listArea, tabs);
            btnCatalog.clicked += () => ShowTab(0, listArea, tabs);
            btnCharms.clicked  += () => ShowTab(1, listArea, tabs);

            _catalogPane.Refresh();
            _charmPane.Refresh();
        }

        public void BuildDetailPane(VisualElement container, UnityEngine.Object selected)
        {
            _header = new DetailHeader();
            _header.SetAsset(selected);
            _header.RenameRequested += name => OnRenameRequested(selected, name);
            container.Add(_header);

            if (selected == null) return;

            if (selected is CharmCatalogSO catalog)
            {
                container.Add(BuildCatalogActionBar(catalog));
                container.Add(SkillModule.MakeDivider());
                container.Add(new InspectorElement(catalog));
            }
            else if (selected is CharmSO charm)
            {
                container.Add(BuildCharmCard(charm));
                container.Add(BuildCharmActionBar(charm));
                container.Add(SkillModule.MakeDivider());
                container.Add(new InspectorElement(charm));
            }
        }

        public void OnActivated()
        {
            _catalogPane?.Refresh();
            _charmPane?.Refresh();
        }

        // ── Tab UI ────────────────────────────────────────────────────────────

        private Button BuildTabBtn(string text, int tabIdx, VisualElement bar)
        {
            var btn = new Button { text = text };
            btn.style.flexGrow                = 1;
            btn.style.paddingTop              = 5;
            btn.style.paddingBottom           = 5;
            btn.style.borderTopLeftRadius     = 0;
            btn.style.borderTopRightRadius    = 0;
            btn.style.borderBottomLeftRadius  = 0;
            btn.style.borderBottomRightRadius = 0;
            btn.style.borderLeftWidth   = 0;
            btn.style.borderRightWidth  = 0;
            btn.style.borderTopWidth    = 0;
            btn.style.borderBottomWidth = 0;
            btn.style.backgroundColor   = new StyleColor(Color.clear);
            btn.userData = tabIdx;
            bar.Add(btn);
            return btn;
        }

        private void ShowTab(int tab, VisualElement area, Button[] tabBtns)
        {
            _activeTab = tab;
            area.Clear();
            for (int i = 0; i < tabBtns.Length; i++)
            {
                if (i == tab)
                {
                    tabBtns[i].style.borderBottomWidth = 2;
                    tabBtns[i].style.borderBottomColor = new StyleColor(new Color(0.4f, 0.65f, 1f, 1f));
                    tabBtns[i].style.opacity = 1f;
                }
                else
                {
                    tabBtns[i].style.borderBottomWidth = 0;
                    tabBtns[i].style.opacity = 0.65f;
                }
            }
            if (tab == 0) { _catalogPane.style.flexGrow = 1; area.Add(_catalogPane); }
            else           { _charmPane.style.flexGrow   = 1; area.Add(_charmPane);   }
        }

        // ── 重命名 ────────────────────────────────────────────────────────────

        private void OnRenameRequested(UnityEngine.Object asset, string newName)
        {
            var (ok, err) = AssetOperations.Rename(asset, newName);
            if (!ok) EditorUtility.DisplayDialog("重命名失败", err, "确定");
            else
            {
                _header.SetAsset(asset);
                if (_activeTab == 0) _catalogPane.Invalidate();
                else                 _charmPane.Invalidate();
            }
        }

        // ── CharmCatalogSO 详情 ───────────────────────────────────────────────

        private VisualElement BuildCatalogActionBar(CharmCatalogSO catalog)
        {
            var bar = SkillModule.MakeActionBar();
            new Button(() => { EditorGUIUtility.PingObject(catalog); Selection.activeObject = catalog; })
                { text = "定位" }.AlsoAddTo(bar);
            return bar;
        }

        // ── CharmSO 详情 ──────────────────────────────────────────────────────

        private static VisualElement BuildCharmCard(CharmSO c)
        {
            var card = SkillModule.MakeCard();
            SkillModule.AddChip(card, "ID",     string.IsNullOrEmpty(c.charmId) ? "-" : c.charmId);
            SkillModule.AddChip(card, "格数",    $"{c.notchCost}");
            SkillModule.AddChip(card, "效果数",  $"{c.effects?.Count ?? 0}");
            if (c.isUnique)
                SkillModule.AddChip(card, "限定", "唯一");
            return card;
        }

        private VisualElement BuildCharmActionBar(CharmSO charm)
        {
            var bar = SkillModule.MakeActionBar();
            new Button(() => { EditorGUIUtility.PingObject(charm); Selection.activeObject = charm; })
                { text = "定位" }.AlsoAddTo(bar);
            new Button(() => { var c = AssetOperations.Clone(charm, CharmFolder); if (c != null) _charmPane.Refresh(c); })
                { text = "克隆..." }.AlsoAddTo(bar);
            var del = new Button(() => { if (AssetOperations.Delete(charm)) _charmPane.Refresh(null); }) { text = "删除" };
            ApplyDeleteStyle(del);
            del.AlsoAddTo(bar);
            return bar;
        }

        // ── 共用 ─────────────────────────────────────────────────────────────

        private static void ApplyDeleteStyle(Button btn)
        {
            var c = new StyleColor(new Color(0.8f, 0.3f, 0.3f, 0.6f));
            btn.style.borderLeftColor   = c;
            btn.style.borderRightColor  = c;
            btn.style.borderTopColor    = c;
            btn.style.borderBottomColor = c;
            btn.style.borderLeftWidth   = 1;
            btn.style.borderRightWidth  = 1;
            btn.style.borderTopWidth    = 1;
            btn.style.borderBottomWidth = 1;
            btn.style.marginLeft = 8;
        }
    }
}