using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text.RegularExpressions;
using UnityEditor;
using UnityEngine;
using UnityEngine.UIElements;
using BaseGames.Localization;
using BaseGames.Editor.Localization;

namespace BaseGames.Editor.Modules
{
    /// <summary>
    /// DataHub 本地化审计模块。
    /// 通过 <see cref="ILocalizableAsset"/> 接口扫描项目中所有 ScriptableObject 的本地化 Key，
    /// 与 Assets/_Game/Data/Localization/ JSON 表比对，列出缺失条目和命名不规范条目。
    ///
    /// 菜单入口：DataHub → "本地化审计"
    /// </summary>
    public class LocalizationAuditModule : IDataModule, IDataModuleOrdered
    {
        public string ModuleId    => "localization-audit";
        public string DisplayName => "本地化审计";
        public string IconName    => "d_UnityEditor.InspectorWindow";
        public int    DisplayOrder => 135;

        // Key 命名规范：UPPER_SNAKE_CASE（大写字母、数字、下划线，首字符必须是大写字母）
        private static readonly Regex s_keyPattern = new(@"^[A-Z][A-Z0-9_]*$", RegexOptions.Compiled);

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

        private readonly List<AuditIssue>   _issues            = new();
        private readonly List<NamingIssue>  _namingIssues      = new();
        private readonly List<Language>     _availableLanguages = new();
        private int                         _totalLanguageCount;
        private bool                        _hasScanned;

        private class AuditIssue
        {
            public string             key;
            public string             table;
            public string             soPath;
            public string             fieldName;
            public UnityEngine.Object asset;
            public readonly List<string> missingLanguages = new();
        }

        private class NamingIssue
        {
            public string             key;
            public string             table;
            public string             soPath;
            public string             fieldName;
            public UnityEngine.Object asset;
        }

        // ── UI 引用 ───────────────────────────────────────────────────────────

        private VisualElement _listItems;
        private Label         _summaryLabel;
        private VisualElement _detailRoot;
        private VisualElement _namingSection;
        private bool   _filterMissingAll, _filterMissingPartial, _filterNamingIssue;
        private string _filterTableName = "";

        // ── IDataModule ───────────────────────────────────────────────────────

        public void Initialize() { }

        public void BuildListPane(VisualElement container, Action<UnityEngine.Object> onSelected)
        {
            // 扫描 + 导出 按钮行
            var btnRow = new VisualElement();
            btnRow.style.flexDirection = FlexDirection.Row;
            btnRow.style.marginTop     = 8;
            btnRow.style.marginLeft    = 8;
            btnRow.style.marginRight   = 8;
            btnRow.style.marginBottom  = 4;
            container.Add(btnRow);

            var scanBtn = new Button(RunScan) { text = "🔍 扫描本地化缺失" };
            scanBtn.style.flexGrow    = 1;
            scanBtn.style.marginRight = 4;
            btnRow.Add(scanBtn);

            var exportBtn = new Button(ExportReport) { text = "📄 导出报告" };
            exportBtn.style.width = 90;
            btnRow.Add(exportBtn);

            _summaryLabel = new Label("尚未扫描，点击左侧按钮开始。");
            _summaryLabel.style.fontSize     = 10;
            _summaryLabel.style.opacity      = 0.6f;
            _summaryLabel.style.paddingLeft  = 10;
            _summaryLabel.style.marginBottom = 4;
            container.Add(_summaryLabel);

            // 过滤行
            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);

            filterRow.Add(DataHubEditorKit.MakeFilterChip("全部语言缺失", v => { _filterMissingAll     = v; RebuildList(); }));
            filterRow.Add(DataHubEditorKit.MakeFilterChip("部分语言缺失", v => { _filterMissingPartial = v; RebuildList(); }));
            // "命名不规范"Chip 现在只控制命名折叠区展开/折叠，不再隐藏缺失列表
            filterRow.Add(DataHubEditorKit.MakeFilterChip("展开命名问题",  v => { _filterNamingIssue    = v; RebuildList(); }));

            // 表名过滤输入框
            var tableField = new TextField("表名过滤") { value = "" };
            tableField.style.paddingLeft  = 6;
            tableField.style.paddingRight = 6;
            tableField.style.marginBottom = 3;
            tableField.RegisterValueChangedCallback(e =>
            {
                _filterTableName = e.newValue?.Trim() ?? "";
                RebuildList();
            });
            container.Add(tableField);

            var scroll = new ScrollView { style = { flexGrow = 1 } };
            container.Add(scroll);

            _listItems = new VisualElement();
            scroll.Add(_listItems);

            _namingSection = new VisualElement();
            scroll.Add(_namingSection);
        }

        public void BuildDetailPane(VisualElement container, UnityEngine.Object selected)
        {
            _detailRoot = container;
            RebuildDetail(null);
        }

        public void OnActivated() { }

        // ── 扫描 ──────────────────────────────────────────────────────────────

        private void RunScan()
        {
            _issues.Clear();
            _namingIssues.Clear();
            _availableLanguages.Clear();
            LocalizationManager.ClearEditorPreviewCache();
            _hasScanned = true;

            DiscoverLanguages();
            _totalLanguageCount = _availableLanguages.Count;

            ScanAllLocalizableAssets();

            int total    = _issues.Count;
            int misAll   = _issues.Count(i => i.missingLanguages.Count == _totalLanguageCount);
            int naming   = _namingIssues.Count;

            _summaryLabel.text = total == 0 && naming == 0
                ? $"✅ 全部通过！已检查 {_totalLanguageCount} 个语言。"
                : $"⚠ {total} 个缺失问题（全语言缺失 {misAll} 个），{naming} 个命名不规范。";

            RebuildList();
        }

        // ── 语言发现 ──────────────────────────────────────────────────────────

        private void DiscoverLanguages()
        {
            // 统一经 LocalizationFileIO 扫描真相源目录（Assets/_Game/Data/Localization）
            _availableLanguages.AddRange(LocalizationFileIO.DiscoverLanguages());
        }

        // ── 通用 ILocalizableAsset 扫描 ───────────────────────────────────────

        private void ScanAllLocalizableAssets()
        {
            string[] guids = AssetDatabase.FindAssets("t:ScriptableObject");
            int      total = guids.Length;

            try
            {
                for (int i = 0; i < total; i++)
                {
                    if (EditorUtility.DisplayCancelableProgressBar(
                            "本地化审计", $"扫描中… ({i + 1}/{total})", (float)(i + 1) / total))
                        break;

                    string path = AssetDatabase.GUIDToAssetPath(guids[i]);
                    var    so   = AssetDatabase.LoadAssetAtPath<ScriptableObject>(path);
                    if (so == null || so is not ILocalizableAsset loc) continue;

                    foreach (var keyRef in loc.GetLocalizationKeys())
                    {
                        CheckKey(so, keyRef.Key, keyRef.Table, keyRef.FieldName);
                        CheckKeyNamingConvention(so, keyRef.Key, keyRef.Table, keyRef.FieldName, path);
                    }
                }
            }
            finally
            {
                EditorUtility.ClearProgressBar();
            }
        }

        // ── 导出审计报告 ──────────────────────────────────────────────────────

        private void ExportReport()
        {
            if (!_hasScanned)
            {
                EditorUtility.DisplayDialog("导出报告", "请先执行扫描，再导出报告。", "确定");
                return;
            }

            string timestamp = DateTime.Now.ToString("yyyyMMdd_HHmmss");
            string dir       = Path.Combine(Application.dataPath, "_Game", "Localization");
            Directory.CreateDirectory(dir);
            string filePath  = Path.Combine(dir, $"AuditReport_{timestamp}.txt");

            using var sw = new StreamWriter(filePath, false, System.Text.Encoding.UTF8);

            sw.WriteLine("====================================================");
            sw.WriteLine("  本地化审计报告");
            sw.WriteLine($"  生成时间：{DateTime.Now:yyyy-MM-dd HH:mm:ss}");
            sw.WriteLine("====================================================");
            sw.WriteLine();
            sw.WriteLine($"缺失条目：{_issues.Count} 个");
            sw.WriteLine($"命名不规范：{_namingIssues.Count} 个");
            sw.WriteLine();

            if (_issues.Count > 0)
            {
                sw.WriteLine("── 缺失翻译 ────────────────────────────────────────");
                foreach (var issue in _issues)
                {
                    sw.WriteLine($"  [{issue.table}] {issue.key}");
                    sw.WriteLine($"    字段：{issue.fieldName}");
                    sw.WriteLine($"    路径：{issue.soPath}");
                    sw.WriteLine($"    缺失语言：{string.Join(", ", issue.missingLanguages)}");
                    sw.WriteLine();
                }
            }

            if (_namingIssues.Count > 0)
            {
                sw.WriteLine("── 命名不规范（应为 UPPER_SNAKE_CASE）────────────────");
                foreach (var ni in _namingIssues)
                {
                    sw.WriteLine($"  [{ni.table}] {ni.key}");
                    sw.WriteLine($"    字段：{ni.fieldName}");
                    sw.WriteLine($"    路径：{ni.soPath}");
                    sw.WriteLine();
                }
            }

            sw.WriteLine("====================================================");
            sw.Flush();

            AssetDatabase.Refresh();

            string relPath = $"Assets/_Game/Localization/AuditReport_{timestamp}.txt";
            var    asset   = AssetDatabase.LoadAssetAtPath<TextAsset>(relPath);
            if (asset != null) EditorGUIUtility.PingObject(asset);

            EditorUtility.DisplayDialog("导出成功",
                $"报告已保存至：\n{filePath}", "打开文件夹");
            EditorUtility.RevealInFinder(filePath);
        }

        // ── Key 检查 ──────────────────────────────────────────────────────────


        private void CheckKey(UnityEngine.Object asset, string key, string table, string fieldName)
        {
            if (string.IsNullOrEmpty(key)) return;

            var issue = new AuditIssue
            {
                key       = key,
                table     = table,
                fieldName = fieldName,
                soPath    = AssetDatabase.GetAssetPath(asset),
                asset     = asset,
            };

            foreach (var lang in _availableLanguages)
            {
                var dict = LocalizationManager.GetEditorTable(lang, table);
                if (dict == null || !dict.ContainsKey(key))
                    issue.missingLanguages.Add(lang.ToString());
            }

            if (issue.missingLanguages.Count > 0)
                _issues.Add(issue);
        }

        private void CheckKeyNamingConvention(UnityEngine.Object asset, string key, string table,
                                              string fieldName, string path)
        {
            if (string.IsNullOrEmpty(key)) return;
            if (s_keyPattern.IsMatch(key)) return;

            _namingIssues.Add(new NamingIssue
            {
                key       = key,
                table     = table,
                fieldName = fieldName,
                soPath    = path,
                asset     = asset,
            });
        }

        // ── 列表 / 详情 UI ────────────────────────────────────────────────────

        private AuditIssue _selectedIssue;

        private void RebuildList()
        {
            _listItems.Clear();
            _namingSection.Clear();
            if (!_hasScanned) return;

            // ── 缺失问题列表（始终显示，不受命名 Chip 影响）─────────────────
            var filtered = _issues.AsEnumerable();

            if (_filterMissingAll)
                filtered = filtered.Where(i => i.missingLanguages.Count == _totalLanguageCount);
            else if (_filterMissingPartial)
                filtered = filtered.Where(i => i.missingLanguages.Count > 0 && i.missingLanguages.Count < _totalLanguageCount);

            if (!string.IsNullOrEmpty(_filterTableName))
                filtered = filtered.Where(i => i.table.IndexOf(_filterTableName, StringComparison.OrdinalIgnoreCase) >= 0);

            var list = filtered.ToList();

            if (list.Count == 0)
            {
                _listItems.Add(new Label("无缺失问题或无匹配结果。") { style = { paddingLeft = 10, opacity = 0.5f } });
            }
            else
            {
                foreach (var issue in list)
                {
                    var row = BuildMissingRow(issue);
                    _listItems.Add(row);
                }
            }

            // ── 命名不规范列表（独立折叠区）────────────────────────────────
            if (_namingIssues.Count > 0)
            {
                var foldout = new Foldout
                {
                    text  = $"命名不规范 Key（{_namingIssues.Count} 个）",
                    value = _filterNamingIssue,
                };
                foldout.style.paddingLeft = 4;
                _namingSection.Add(foldout);

                var namingFiltered = _namingIssues.AsEnumerable();
                if (!string.IsNullOrEmpty(_filterTableName))
                    namingFiltered = namingFiltered.Where(i => i.table.IndexOf(_filterTableName, StringComparison.OrdinalIgnoreCase) >= 0);

                foreach (var ni in namingFiltered)
                {
                    var row = new VisualElement();
                    row.style.flexDirection     = FlexDirection.Row;
                    row.style.paddingLeft       = 8;
                    row.style.paddingRight      = 8;
                    row.style.paddingTop        = 3;
                    row.style.paddingBottom     = 3;
                    row.style.borderBottomWidth = 1;
                    row.style.borderBottomColor = new StyleColor(new Color(0.3f, 0.3f, 0.3f, 0.4f));
                    row.style.backgroundColor   = new StyleColor(new Color(0.2f, 0.2f, 0.45f, 0.25f));

                    var capturedNi = ni;
                    row.RegisterCallback<ClickEvent>(_ =>
                    {
                        if (capturedNi.asset != null)
                        {
                            EditorGUIUtility.PingObject(capturedNi.asset);
                            Selection.activeObject = capturedNi.asset;
                        }
                        RebuildNamingDetail(capturedNi);
                    });

                    var lbl = new Label($"[{ni.table}] {ni.key}  （{ni.fieldName}）");
                    lbl.style.flexGrow  = 1;
                    lbl.style.fontSize  = 11;
                    row.Add(lbl);

                    var hint = new Label("应为 UPPER_SNAKE_CASE");
                    hint.style.fontSize = 10;
                    hint.style.opacity  = 0.6f;
                    row.Add(hint);

                    foldout.Add(row);
                }
            }
        }

        private VisualElement BuildMissingRow(AuditIssue issue)
        {
            var row = new VisualElement();
            row.style.flexDirection     = FlexDirection.Row;
            row.style.paddingLeft       = 8;
            row.style.paddingRight      = 8;
            row.style.paddingTop        = 4;
            row.style.paddingBottom     = 4;
            row.style.borderBottomWidth = 1;
            row.style.borderBottomColor = new StyleColor(new Color(0.3f, 0.3f, 0.3f, 0.4f));

            var captured = issue;
            row.RegisterCallback<ClickEvent>(_ =>
            {
                _selectedIssue = captured;
                RebuildDetail(captured);
                if (captured.asset != null)
                    EditorGUIUtility.PingObject(captured.asset);
            });

            bool allMissing = issue.missingLanguages.Count == _totalLanguageCount;
            row.style.backgroundColor = new StyleColor(allMissing
                ? new Color(0.45f, 0.15f, 0.05f, 0.35f)
                : new Color(0.40f, 0.35f, 0.00f, 0.25f));

            var left  = new Label($"[{issue.table}] {issue.key}");
            left.style.flexGrow                = 1;
            left.style.fontSize                = 11;
            left.style.unityFontStyleAndWeight = FontStyle.Bold;
            row.Add(left);

            var right = new Label(string.Join(", ", issue.missingLanguages));
            right.style.fontSize = 10;
            right.style.opacity  = 0.7f;
            row.Add(right);

            return row;
        }

        private void RebuildDetail(AuditIssue issue)
        {
            if (_detailRoot == null) return;
            _detailRoot.Clear();

            if (issue == null)
            {
                _detailRoot.Add(new Label("← 选择左侧条目查看详情。") { style = { paddingLeft = 16, paddingTop = 16, opacity = 0.5f } });
                return;
            }

            var title = new Label($"Key：{issue.key}");
            title.style.fontSize                = 14;
            title.style.unityFontStyleAndWeight = FontStyle.Bold;
            title.style.paddingLeft             = 12;
            title.style.paddingTop              = 10;
            title.style.paddingBottom           = 6;
            _detailRoot.Add(title);

            AddDetailRow(_detailRoot, "表名",    issue.table);
            AddDetailRow(_detailRoot, "字段",    issue.fieldName);
            AddDetailRow(_detailRoot, "资产路径", issue.soPath);

            _detailRoot.Add(new Label("缺失语言：") { style = { paddingLeft = 12, paddingTop = 8, fontSize = 11, unityFontStyleAndWeight = FontStyle.Bold } });
            foreach (var lang in issue.missingLanguages)
                _detailRoot.Add(new Label($"  • {lang}") { style = { paddingLeft = 20, fontSize = 11 } });

            _detailRoot.Add(new VisualElement { style = { height = 8 } });
            var btnRow = new VisualElement { style = { flexDirection = FlexDirection.Row, paddingLeft = 10, paddingRight = 10 } };
            _detailRoot.Add(btnRow);

            var pingBtn = new Button(() =>
            {
                if (issue.asset != null)
                {
                    EditorGUIUtility.PingObject(issue.asset);
                    Selection.activeObject = issue.asset;
                }
            }) { text = "定位 SO 资产", style = { flexGrow = 1, marginRight = 4 } };
            btnRow.Add(pingBtn);

            var copyBtn = new Button(() =>
            {
                EditorGUIUtility.systemCopyBuffer = issue.key;
                Debug.Log($"[LocalizationAudit] 已复制 Key：{issue.key}");
            }) { text = "复制 Key", style = { flexGrow = 1 } };
            btnRow.Add(copyBtn);

            foreach (var lang in issue.missingLanguages)
            {
                var capturedLang = lang;
                var openBtn = new Button(() => PingTableFile(capturedLang, issue.table))
                {
                    text  = $"打开 {lang}/{issue.table}.json",
                    style = { marginTop = 4, marginLeft = 10, marginRight = 10 },
                };
                _detailRoot.Add(openBtn);
            }
        }

        private void RebuildNamingDetail(NamingIssue ni)
        {
            if (_detailRoot == null) return;
            _detailRoot.Clear();

            var title = new Label($"命名不规范：{ni.key}");
            title.style.fontSize                = 14;
            title.style.unityFontStyleAndWeight = FontStyle.Bold;
            title.style.paddingLeft             = 12;
            title.style.paddingTop              = 10;
            title.style.paddingBottom           = 6;
            _detailRoot.Add(title);

            AddDetailRow(_detailRoot, "表名",    ni.table);
            AddDetailRow(_detailRoot, "字段",    ni.fieldName);
            AddDetailRow(_detailRoot, "资产路径", ni.soPath);

            _detailRoot.Add(new Label("规范要求：UPPER_SNAKE_CASE（如 QUEST_FIND_HERB_NAME）")
                { style = { paddingLeft = 12, paddingTop = 8, fontSize = 11, opacity = 0.7f } });

            _detailRoot.Add(new VisualElement { style = { height = 8 } });
            var pingBtn = new Button(() =>
            {
                if (ni.asset != null)
                {
                    EditorGUIUtility.PingObject(ni.asset);
                    Selection.activeObject = ni.asset;
                }
            }) { text = "定位 SO 资产", style = { marginLeft = 10, marginRight = 10 } };
            _detailRoot.Add(pingBtn);

            var copyBtn = new Button(() =>
            {
                EditorGUIUtility.systemCopyBuffer = ni.key;
                Debug.Log($"[LocalizationAudit] 已复制 Key：{ni.key}");
            }) { text = "复制 Key", style = { marginLeft = 10, marginRight = 10, marginTop = 4 } };
            _detailRoot.Add(copyBtn);
        }

        private static void AddDetailRow(VisualElement parent, string label, string value)
        {
            var row = new VisualElement { style = { flexDirection = FlexDirection.Row, paddingLeft = 12, paddingTop = 2, paddingBottom = 2 } };
            row.Add(new Label(label + "：") { style = { width = 80, opacity = 0.6f, fontSize = 11 } });
            row.Add(new Label(value)        { style = { flexGrow = 1, fontSize = 11 } });
            parent.Add(row);
        }

        private static void PingTableFile(string language, string tableName)
        {
            if (Enum.TryParse<Language>(language, out var lang))
            {
                if (LocalizationFileIO.Ping(lang, tableName) == null)
                    Debug.LogWarning($"[LocalizationAudit] 未找到表文件：{LocalizationPaths.AssetPath(lang, tableName)}");
            }
            else
            {
                LocalizationFileIO.PingAny(tableName);
            }
        }
    }
}