using System;
using UnityEditor;
using UnityEditor.UIElements;
using UnityEngine;
using UnityEngine.UIElements;
using BaseGames.Dialogue;
using BaseGames.Quest;
using BaseGames.Editor.Shared;
using BaseGames.Localization;

namespace BaseGames.Editor.Modules
{
    /// <summary>
    /// DataHub NPC 模块 —— 管理 NpcSO 资产。
    /// 统一查看、创建、重命名、删除 NPC 定义（ID、名称 Key、头像、好感度上限）。
    /// </summary>
    public class NpcModule : IDataModule, IDataModuleOrdered
    {
        private const string Folder = "Assets/_Game/Data/NPC";
        private const string Prefix = "NPC_";

        public string ModuleId    => "npc";
        public string DisplayName => "NPC";
        public string IconName    => "d_GameObject Icon";
        public int    DisplayOrder => 90;

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

        public void Initialize()
        {
            _listPane = new SoListPane<NpcSO>(
                Folder, Prefix,
                n => n.maxAffinity > 0 ? $"亲密{n.maxAffinity}" : null);
            // 扩展搜索：npcId + nameKey
            _listPane.GetExtraSearchText = n => $"{n.npcId} {n.nameKey}";
        }

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

            // ── 快速过滤标签行 ─────────────────────────────────────────────
            var filterRow = new VisualElement();
            filterRow.style.flexDirection  = FlexDirection.Row;
            filterRow.style.flexWrap       = Wrap.Wrap;
            filterRow.style.paddingLeft    = 6;
            filterRow.style.paddingRight   = 6;
            filterRow.style.paddingBottom  = 3;
            container.Add(filterRow);

            bool filterAffinity = false, filterPortrait = false;

            void RebuildFilter()
            {
                if (!filterAffinity && !filterPortrait)
                {
                    _listPane.ExtraFilter = null;
                    return;
                }
                _listPane.ExtraFilter = n =>
                {
                    if (filterAffinity && n.maxAffinity <= 0) return false;
                    if (filterPortrait && n.portrait == null) return false;
                    return true;
                };
            }

            filterRow.Add(DataHubEditorKit.MakeFilterChip("有好感度", v => { filterAffinity = v; RebuildFilter(); }));
            filterRow.Add(DataHubEditorKit.MakeFilterChip("有头像",   v => { filterPortrait = v; RebuildFilter(); }));

            container.Add(_listPane);
            _listPane.Refresh();
        }

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

            _header = new DetailHeader();
            _header.SetAsset(_selected);
            _header.RenameRequested += OnRenameRequested;
            container.Add(_header);

            if (_selected == null) return;

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

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

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

        private void OnRenameRequested(string newName)
        {
            if (_selected == null) return;
            var (ok, err) = AssetOperations.Rename(_selected, newName);
            if (!ok) EditorUtility.DisplayDialog("重命名失败", err, "确定");
            else { _header.SetAsset(_selected); _listPane.Invalidate(); }
        }

        private static VisualElement BuildInfoCard(NpcSO n)
        {
            var card = SkillModule.MakeCard();

            SkillModule.AddChip(card, "NPC ID", string.IsNullOrEmpty(n.npcId) ? "(未设置)" : n.npcId);

            string nameDisplay = string.IsNullOrEmpty(n.nameKey)
                ? "(未设置)"
                : (BaseGames.Localization.LocalizationManager.GetEditorPreview(n.nameKey, LocalizationTable.Dialogue) ?? n.nameKey);
            SkillModule.AddChip(card, "名称", nameDisplay);
            if (!string.IsNullOrEmpty(n.nameKey))
                SkillModule.AddChip(card, "名称 Key", n.nameKey);
            if (n.maxAffinity > 0)
                SkillModule.AddChip(card, "好感度上限", n.maxAffinity.ToString());

            // 头像预览
            if (n.portrait != null)
            {
                var row = new VisualElement();
                row.style.flexDirection = FlexDirection.Row;
                row.style.alignItems    = Align.Center;
                row.style.paddingLeft   = 8;
                row.style.paddingTop    = 4;

                var img = new Image { image = n.portrait.texture };
                img.style.width  = 40;
                img.style.height = 40;
                img.style.borderTopLeftRadius     = 4;
                img.style.borderTopRightRadius    = 4;
                img.style.borderBottomLeftRadius  = 4;
                img.style.borderBottomRightRadius = 4;
                row.Add(img);
                card.Add(row);
            }

            // 关联任务反查：显示哪些任务以此 NPC 为发布者
            var referencingQuests = FindQuestsReferencingNpc(n);
            if (referencingQuests.Count > 0)
            {
                SkillModule.AddChip(card, "关联任务", $"共 {referencingQuests.Count} 个");
                var refFold = new UnityEngine.UIElements.Foldout
                {
                    text  = $"关联任务（{referencingQuests.Count}）",
                    value = false,
                };
                refFold.style.paddingLeft = 8;
                foreach (var q in referencingQuests)
                {
                    var btn = new UnityEngine.UIElements.Button(() => UnityEditor.EditorGUIUtility.PingObject(q))
                    {
                        text = string.IsNullOrEmpty(q.questId) ? q.name : $"{q.questId} ({q.name})"
                    };
                    btn.style.unityTextAlign = UnityEngine.TextAnchor.MiddleLeft;
                    btn.style.fontSize       = 10;
                    btn.style.marginBottom   = 1;
                    refFold.Add(btn);
                }
                card.Add(refFold);
            }

            return card;
        }

        // ── 关联任务缓存（5 秒 TTL，避免每次切换 NPC 时全量扫描资产数据库）──────────────
        private static System.Collections.Generic.Dictionary<NpcSO, System.Collections.Generic.List<QuestSO>>
            s_npcQuestCache;
        private static double s_npcQuestCacheTime = -10.0;

        private static System.Collections.Generic.List<QuestSO> FindQuestsReferencingNpc(NpcSO n)
        {
            double now = UnityEditor.EditorApplication.timeSinceStartup;
            if (s_npcQuestCache != null && now - s_npcQuestCacheTime < 5.0)
            {
                s_npcQuestCache.TryGetValue(n, out var cached);
                return cached ?? new System.Collections.Generic.List<QuestSO>();
            }

            // TTL 过期，重建全量缓存（单次扫描所有 QuestSO，分组存储）
            s_npcQuestCache = new System.Collections.Generic.Dictionary<NpcSO, System.Collections.Generic.List<QuestSO>>();
            var guids = UnityEditor.AssetDatabase.FindAssets("t:QuestSO");
            foreach (var guid in guids)
            {
                var path = UnityEditor.AssetDatabase.GUIDToAssetPath(guid);
                var q    = UnityEditor.AssetDatabase.LoadAssetAtPath<QuestSO>(path);
                if (q == null || q.giverNpc == null) continue;
                if (!s_npcQuestCache.TryGetValue(q.giverNpc, out var list))
                {
                    list = new System.Collections.Generic.List<QuestSO>();
                    s_npcQuestCache[q.giverNpc] = list;
                }
                list.Add(q);
            }
            s_npcQuestCacheTime = now;

            s_npcQuestCache.TryGetValue(n, out var result);
            return result ?? new System.Collections.Generic.List<QuestSO>();
        }

        private VisualElement BuildActionBar(NpcSO n)
        {
            var bar = SkillModule.BuildStandardActionBar(
                n, Folder, Prefix,
                onCreated: c => _listPane.Refresh(c),
                onCloned:  c => _listPane.Refresh(c),
                onDeleted:   () => _listPane.Refresh(null),
                wizardCreate: cb => AssetCreationWizard.Show<NpcSO>(
                    Folder, Prefix,
                    (npc, id) =>
                    {
                        npc.npcId = id;
                        EditorUtility.SetDirty(npc);
                        AssetDatabase.SaveAssets();
                        cb(npc);
                    }));

            // 批量验证按钮
            var validateBtn = new Button(ValidateAllNpcs) { text = "批量验证" };
            validateBtn.style.marginLeft = 4;
            bar.Add(validateBtn);
            return bar;
        }

        // ── 批量验证 ─────────────────────────────────────────────────────────

        /// <summary>
        /// 遍历所有 NpcSO，检查：
        ///   1. npcId 为空
        ///   2. npcId 重复（全局）
        ///   3. nameKey 为空（NPC 无显示名称）
        ///   4. maxAffinity > 0 但 portrait 为 null（好感度 UI 无头像可展示）
        ///   5. nameKey 在本地化表中不存在
        ///   6. interactPromptKey 非空但在本地化表中不存在
        ///   7. 与同 npcId 的 DialogueActorSO portrait 不一致
        /// 结果在 QuestValidationResultWindow 中展示，每项问题附"选中"按钮可一键定位资产。
        /// </summary>
        private static void ValidateAllNpcs()
        {
            var allNpcs    = AssetOperations.FindAll<NpcSO>();
            var issues     = new System.Collections.Generic.List<QuestValidationResultWindow.Issue>();
            int errorCount = 0, warnCount = 0;

            void AddError(string msg, UnityEngine.Object asset = null)
            {
                issues.Add(new QuestValidationResultWindow.Issue { message = msg, isError = true,  asset = asset });
                errorCount++;
            }
            void AddWarn(string msg, UnityEngine.Object asset = null)
            {
                issues.Add(new QuestValidationResultWindow.Issue { message = msg, isError = false, asset = asset });
                warnCount++;
            }

            // 预构建本地化缓存（单次查询，整个验证过程复用）
            var locCache = new System.Collections.Generic.Dictionary<string, string>(System.StringComparer.Ordinal);
            string GetLoc(string key)
            {
                if (locCache.TryGetValue(key, out var v)) return v;
                v = BaseGames.Localization.LocalizationManager.GetEditorPreview(key, LocalizationTable.Dialogue);
                locCache[key] = v;
                return v;
            }

            // 预构建 DialogueActorSO 映射 actorId → ActorSO（用于 portrait 一致性检查）
            var actorMap = new System.Collections.Generic.Dictionary<string, BaseGames.Dialogue.DialogueActorSO>(
                System.StringComparer.Ordinal);
            var actorGuids = UnityEditor.AssetDatabase.FindAssets("t:DialogueActorSO");
            foreach (var g in actorGuids)
            {
                var path = UnityEditor.AssetDatabase.GUIDToAssetPath(g);
                var actor = UnityEditor.AssetDatabase.LoadAssetAtPath<BaseGames.Dialogue.DialogueActorSO>(path);
                if (actor != null && !string.IsNullOrEmpty(actor.actorId) && !actorMap.ContainsKey(actor.actorId))
                    actorMap[actor.actorId] = actor;
            }

            // 1 & 2：空 npcId / 重复 npcId
            var idMap = new System.Collections.Generic.Dictionary<string, NpcSO>(System.StringComparer.Ordinal);
            foreach (var n in allNpcs)
            {
                if (string.IsNullOrWhiteSpace(n.npcId))
                {
                    AddError($"{n.name}: npcId 为空，NPC 无法被系统引用。", n);
                    continue;
                }
                if (idMap.TryGetValue(n.npcId, out var existing))
                    AddError($"重复 npcId \"{n.npcId}\"：{n.name} 与 {existing.name}", n);
                else
                    idMap[n.npcId] = n;
            }

            // 3-7：其余字段检查
            foreach (var n in allNpcs)
            {
                // 3. nameKey 为空
                if (string.IsNullOrEmpty(n.nameKey))
                    AddWarn($"{n.name}（{n.npcId}）: nameKey 为空，运行时显示空名称。", n);

                // 4. 有好感度但无头像
                if (n.maxAffinity > 0 && n.portrait == null)
                    AddWarn($"{n.name}（{n.npcId}）: maxAffinity={n.maxAffinity} 但 portrait 为 null，好感度进度条 UI 无头像可展示。", n);

                // 5. nameKey 本地化不存在
                if (!string.IsNullOrEmpty(n.nameKey) && GetLoc(n.nameKey) == null)
                    AddWarn($"{n.name}（{n.npcId}）: nameKey \"{n.nameKey}\" 在本地化表中不存在。", n);

                // 5b. nameKey 格式异常（含空格或非法字符）
                if (!string.IsNullOrEmpty(n.nameKey) &&
                    !System.Text.RegularExpressions.Regex.IsMatch(n.nameKey, @"^[\w\-\.]+$"))
                    AddWarn($"{n.name}（{n.npcId}）: nameKey \"{n.nameKey}\" 含有空格或非法字符，建议只使用字母、数字、_、-、.。", n);

                // 6. interactPromptKey 本地化不存在
                if (!string.IsNullOrEmpty(n.interactPromptKey) && GetLoc(n.interactPromptKey) == null)
                    AddWarn($"{n.name}（{n.npcId}）: interactPromptKey \"{n.interactPromptKey}\" 在本地化表中不存在，运行时交互提示显示 Key 原文。", n);

                // 7. portrait 与同 npcId 的 DialogueActorSO 不一致
                if (!string.IsNullOrEmpty(n.npcId) && actorMap.TryGetValue(n.npcId, out var actor))
                {
                    if (actor.portrait != n.portrait)
                        AddWarn($"{n.name}（{n.npcId}）: portrait 与 DialogueActorSO \"{actor.name}\" 的 portrait 不一致，" +
                                "对话框中显示的头像与 NPC 信息面板头像可能不同。", n);
                }
            }

            UnityEngine.Debug.Log($"[NpcModule] 验证完成：{allNpcs.Count} 个 NPC，{errorCount} 个错误，{warnCount} 个警告。");
            QuestValidationResultWindow.Show(issues, errorCount, warnCount, allNpcs.Count, "NPC 批量验证结果", "NPC");
        }
    }
}