using System;
using UnityEditor;
using UnityEditor.UIElements;
using UnityEngine;
using UnityEngine.UIElements;
using BaseGames.World.Streaming;

namespace BaseGames.Editor.Modules
{
    /// <summary>
    /// DataHub 流式加载模块 —— 管理 <see cref="StreamingBudgetConfigSO"/> 资产。
    /// </summary>
    public class StreamingModule : IDataModule, IDataModuleOrdered
    {
        private const string Folder = "Assets/_Game/Data/Streaming";
        private const string Prefix = "STR_";

        public string ModuleId    => "streaming";
        public string DisplayName => "流式加载";
        public string IconName    => "d_RectTransformBlueprint";
        public int    DisplayOrder => 70;

        private SoListPane<StreamingBudgetConfigSO> _listPane;
        private DetailHeader                        _header;
        private StreamingBudgetConfigSO             _selected;

        public void Initialize()
        {
            _listPane = new SoListPane<StreamingBudgetConfigSO>(
                Folder, Prefix,
                cfg => $"休眠上限 {cfg.MaxDormantRooms}  预加载深度 {cfg.PreloadLookaheadHops}跳");
            _listPane.SelectionChanged = sel =>
            {
                _selected = sel;
            };
        }

        public void BuildListPane(VisualElement container, Action<UnityEngine.Object> onSelected)
        {
            _listPane.SelectionChanged = sel =>
            {
                _selected = sel;
                onSelected?.Invoke(sel);
            };

            // 顶部操作栏（新建）
            var topBar = new VisualElement();
            topBar.style.flexDirection  = FlexDirection.Row;
            topBar.style.paddingLeft    = 8;
            topBar.style.paddingRight   = 8;
            topBar.style.paddingTop     = 6;
            topBar.style.paddingBottom  = 6;
            topBar.style.borderBottomWidth = 1;
            topBar.style.borderBottomColor = new StyleColor(new Color(0.5f, 0.5f, 0.5f, 0.3f));
            container.Add(topBar);

            var createBtn = new Button(() =>
            {
                var created = AssetOperations.Create<StreamingBudgetConfigSO>(Folder, "STR_BudgetConfig_New");
                if (created != null) _listPane.Refresh(created);
            }) { text = "+ 新建配置" };
            createBtn.style.flexGrow = 1;
            topBar.Add(createBtn);

            container.Add(_listPane);
            _listPane.style.flexGrow = 1;
            _listPane.Refresh();
        }

        public void BuildDetailPane(VisualElement container, UnityEngine.Object selected)
        {
            _selected = selected as StreamingBudgetConfigSO;

            _header = new DetailHeader();
            _header.SetAsset(_selected);
            _header.RenameRequested += newName => OnRenameRequested(selected, newName);
            container.Add(_header);

            if (_selected == null) return;

            container.Add(BuildStatsCard(_selected));
            container.Add(BuildActionBar(_selected));
            container.Add(SkillModule.MakeDivider());
            container.Add(new InspectorElement(_selected));
        }

        public void OnActivated() => _listPane?.Refresh();

        // ── Stats Card ────────────────────────────────────────────────────────

        private static VisualElement BuildStatsCard(StreamingBudgetConfigSO cfg)
        {
            var card = SkillModule.MakeCard();
            SkillModule.AddChip(card, "最大休眠房间",   $"{cfg.MaxDormantRooms}");
            SkillModule.AddChip(card, "内存上限",        $"{cfg.MaxMemoryMB} MB");
            SkillModule.AddChip(card, "并发加载数",      $"{cfg.MaxConcurrentLoads}");
            SkillModule.AddChip(card, "预加载跳数",      $"{cfg.PreloadLookaheadHops}");
            SkillModule.AddChip(card, "冷却时长",        $"{cfg.CoolingDuration:F1}s");
            SkillModule.AddChip(card, "每帧激活数",      $"{cfg.LifecycleActivatePerFrame}");
            return card;
        }

        // ── Action Bar ────────────────────────────────────────────────────────

        private VisualElement BuildActionBar(StreamingBudgetConfigSO cfg)
        {
            var bar = SkillModule.MakeActionBar();

            new Button(() =>
            {
                EditorGUIUtility.PingObject(cfg);
                Selection.activeObject = cfg;
            }) { text = "定位" }.AlsoAddTo(bar);

            new Button(() =>
            {
                var c = AssetOperations.Clone(cfg, Folder);
                if (c != null) _listPane.Refresh(c);
            }) { text = "克隆..." }.AlsoAddTo(bar);

            var del = new Button(() =>
            {
                if (AssetOperations.Delete(cfg)) _listPane.Refresh(null);
            }) { text = "删除" };
            ApplyDeleteStyle(del);
            del.AlsoAddTo(bar);

            return bar;
        }

        // ── 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); _listPane.Invalidate(); }
        }

        // ── 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;
        }
    }
}