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

namespace BaseGames.Editor.Modules
{
    /// <summary>
    /// DataHub 敌人模块 —— Tab 切换管理 EnemyStatsSO 和 LootTableSO。
    /// </summary>
    public class EnemyModule : IDataModule, IDataModuleOrdered
    {
        private const string StatsFolder = "Assets/_Game/Data/Enemies/Stats";
        private const string LootFolder  = "Assets/_Game/Data/Enemies/Loot";

        public string ModuleId    => "enemy";
        public string DisplayName => "敌人";
        public string IconName    => null;
        public int    DisplayOrder => 30;

        private int _activeTab = 0; // 0=Stats, 1=Loot

        private SoListPane<EnemyStatsSO>  _statsPane;
        private SoListPane<LootTableSO>   _lootPane;
        private VisualElement             _listContainer;
        private Action<UnityEngine.Object> _onSelected;

        private DetailHeader              _header;
        private EnemyStatsSO              _selectedStats;
        private LootTableSO               _selectedLoot;

        public void Initialize()
        {
            _statsPane = new SoListPane<EnemyStatsSO>(StatsFolder, "ENM_");
            _statsPane.SelectionChanged = s => { _selectedStats = s; _onSelected?.Invoke(s); };

            _lootPane = new SoListPane<LootTableSO>(LootFolder, "ENM_Loot_");
            _lootPane.SelectionChanged = l => { _selectedLoot = l; _onSelected?.Invoke(l); };
        }

        public void BuildListPane(VisualElement container, Action<UnityEngine.Object> onSelected)
        {
            _onSelected     = onSelected;
            _listContainer  = container;

            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 btnStats = BuildTabBtn("属性 (Stats)", 0, tabBar);
            var btnLoot  = BuildTabBtn("掉落 (Loot)",  1, tabBar);

            // 列表区域占位
            var listArea = new VisualElement();
            listArea.style.flexGrow = 1;
            container.Add(listArea);

            ShowTab(0, listArea, new[] { btnStats, btnLoot });

            btnStats.clicked += () => ShowTab(0, listArea, new[] { btnStats, btnLoot });
            btnLoot.clicked  += () => ShowTab(1, listArea, new[] { btnStats, btnLoot });

            _statsPane.Refresh();
            _lootPane.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 EnemyStatsSO stats)
            {
                container.Add(BuildStatsCard(stats));
                container.Add(BuildActionBar(stats, StatsFolder, _statsPane));
                container.Add(SkillModule.MakeDivider());
                var insp = new InspectorElement(stats);                container.Add(insp);
            }
            else if (selected is LootTableSO loot)
            {
                container.Add(BuildLootCard(loot));
                container.Add(BuildActionBar(loot, LootFolder, _lootPane));
                container.Add(SkillModule.MakeDivider());
                var insp = new InspectorElement(loot);                container.Add(insp);
            }
        }

        public void OnActivated()
        {
            _statsPane?.Refresh();
            _lootPane?.Refresh();
        }

        // ── 内部 ─────────────────────────────────────────────────────────────

        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) { _statsPane.style.flexGrow = 1; area.Add(_statsPane); }
            else           { _lootPane.style.flexGrow  = 1; area.Add(_lootPane);  }
        }

        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) _statsPane.Invalidate();
                else                 _lootPane.Invalidate();
            }
        }

        private static VisualElement BuildStatsCard(EnemyStatsSO s)
        {
            var card = SkillModule.MakeCard();
            SkillModule.AddChip(card, "HP",    s.MaxHP.ToString());
            SkillModule.AddChip(card, "防御",  s.Defense.ToString());
            SkillModule.AddChip(card, "移速",  $"{s.WalkSpeed}/{s.RunSpeed}");
            SkillModule.AddChip(card, "攻击",  s.AttackDamage.ToString());
            SkillModule.AddChip(card, "感知",  $"{s.DetectRange}m");
            return card;
        }

        private static VisualElement BuildLootCard(LootTableSO l)
        {
            var card = SkillModule.MakeCard();
            SkillModule.AddChip(card, "掉落项", (l.Entries?.Length ?? 0).ToString());
            SkillModule.AddChip(card, "灵珠保底", $"{l.GuaranteedLingZhuMin}-{l.GuaranteedLingZhuMax}");
            return card;
        }

        private VisualElement BuildActionBar<T>(T asset, string folder, SoListPane<T> pane)
            where T : ScriptableObject
        {
            var bar = SkillModule.MakeActionBar();
            new Button(() => { EditorGUIUtility.PingObject(asset); Selection.activeObject = asset; })
                { text = "定位" }.AlsoAddTo(bar);
            new Button(() => { var c = AssetOperations.Clone(asset, folder); if (c != null) pane.Refresh(c); })
                { text = "克隆..." }.AlsoAddTo(bar);
            var del = new Button(() => { if (AssetOperations.Delete(asset)) pane.Refresh(null); }) { text = "删除" };
            del.style.borderLeftColor   = new StyleColor(new Color(0.8f, 0.3f, 0.3f, 0.6f));
            del.style.borderRightColor  = new StyleColor(new Color(0.8f, 0.3f, 0.3f, 0.6f));
            del.style.borderTopColor    = new StyleColor(new Color(0.8f, 0.3f, 0.3f, 0.6f));
            del.style.borderBottomColor = new StyleColor(new Color(0.8f, 0.3f, 0.3f, 0.6f));
            del.style.borderLeftWidth   = 1;
            del.style.borderRightWidth  = 1;
            del.style.borderTopWidth    = 1;
            del.style.borderBottomWidth = 1;
            del.style.marginLeft  = 8;
            del.AlsoAddTo(bar);
            return bar;
        }
    }
}