using System;
using System.Collections.Generic;
using System.Linq;
using UnityEditor;
using UnityEditor.UIElements;
using UnityEngine;
using UnityEngine.UIElements;
using BaseGames.Enemies.Abilities;

namespace BaseGames.Editor.Modules
{
    /// <summary>
    /// DataHub 敌人能力模块 —— 全部 <see cref="EnemyAbilitySO"/> 的对比表格。
    ///
    /// 本模块刻意不做成「列表 + 详情」的标准形态：能力资产按敌人分散在
    /// Data/Enemies/{敌人}/Abilities/ 下，逐个点开看不出问题；真正需要的是横向对比
    /// —— 同一敌人的招之间射程/权重/冷却是否成比例、有没有 Attack 类却射程为 0 的死招。
    /// 所以表格本身就是导航：点行即选中资产，Inspector 出现在表格下方。
    ///
    /// 新建不在此模块内做：能力有类型化子类（EnemyAbilitySO 的各子类），且必须落到
    /// 对应敌人的目录，这两件事由角色向导保证（CLAUDE.md 第 2 条：不裸建）。
    /// </summary>
    public class EnemyAbilityModule : IDataModule, IDataModuleOrdered
    {
        public string ModuleId    => "enemyability";
        public string DisplayName => "敌人能力";
        public string IconName    => null;
        public int    DisplayOrder => 35;   // 紧随「敌人」(30)

        private readonly List<AbilityOverviewRow> _rows = new List<AbilityOverviewRow>();

        private AbilityOverviewColumn _sortColumn = AbilityOverviewColumn.Owner;
        private bool _sortAscending = true;
        private bool _onlyIssues;
        private bool _onlyAttack;

        private EnemyAbilitySO _selected;
        private Label          _summaryLabel;
        private VisualElement  _tableHost;      // 表格容器：过滤/排序变化时只重建它
        private Action<UnityEngine.Object> _onSelected;

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

        public void Initialize() => Reload();

        public void OnActivated()
        {
            Reload();
            RebuildTable();
            UpdateSummary();
        }

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

            _summaryLabel = new Label();
            _summaryLabel.style.fontSize     = 10;
            _summaryLabel.style.opacity      = 0.7f;
            _summaryLabel.style.paddingLeft  = 10;
            _summaryLabel.style.paddingTop   = 8;
            _summaryLabel.style.whiteSpace   = WhiteSpace.Normal;
            container.Add(_summaryLabel);
            UpdateSummary();

            var hint = new Label("能力资产按敌人分目录存放，本页把它们并到一张表里横向对比。\n点表格中的行即可选中并编辑该资产。");
            hint.style.fontSize    = 10;
            hint.style.opacity     = 0.45f;
            hint.style.whiteSpace  = WhiteSpace.Normal;
            hint.style.paddingLeft = 10;
            hint.style.paddingRight = 8;
            hint.style.paddingTop  = 6;
            container.Add(hint);

            var refreshBtn = new Button(() => { Reload(); RebuildTable(); UpdateSummary(); }) { text = "刷新" };
            refreshBtn.style.marginTop   = 10;
            refreshBtn.style.marginLeft  = 8;
            refreshBtn.style.marginRight = 8;
            container.Add(refreshBtn);

            // 新建走向导：能力有类型化子类且必须落到对应敌人目录，裸建两者都保证不了
            var wizardBtn = new Button(OpenCharacterWizard) { text = "用角色向导新建…" };
            wizardBtn.style.marginTop   = 4;
            wizardBtn.style.marginLeft  = 8;
            wizardBtn.style.marginRight = 8;
            container.Add(wizardBtn);
        }

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

            // 过滤
            var filterRow = new VisualElement();
            filterRow.style.flexDirection = FlexDirection.Row;
            filterRow.style.flexWrap      = Wrap.Wrap;
            filterRow.style.paddingLeft   = 6;
            filterRow.style.paddingTop    = 6;
            filterRow.style.paddingBottom = 4;
            filterRow.Add(DataHubEditorKit.MakeFilterChip("仅有问题",
                v => { _onlyIssues = v; RebuildTable(); UpdateSummary(); }));
            filterRow.Add(DataHubEditorKit.MakeFilterChip("仅 Attack 类",
                v => { _onlyAttack = v; RebuildTable(); UpdateSummary(); }));
            container.Add(filterRow);

            _tableHost = new VisualElement();
            container.Add(_tableHost);
            RebuildTable();

            if (_selected == null) return;

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

        // ── 表格 ─────────────────────────────────────────────────────────

        private void Reload()
        {
            _rows.Clear();
            foreach (var so in AssetOperations.FindAll<EnemyAbilitySO>())
                _rows.Add(EnemyAbilityOverview.BuildRow(so, AssetDatabase.GetAssetPath(so)));
        }

        private IEnumerable<AbilityOverviewRow> VisibleRows()
        {
            var rows = _rows.AsEnumerable();
            if (_onlyIssues) rows = rows.Where(r => r.HasIssue);
            if (_onlyAttack) rows = rows.Where(r => r.Category == AbilityCategory.Attack);
            return EnemyAbilityOverview.Sort(rows.ToList(), _sortColumn, _sortAscending);
        }

        private void RebuildTable()
        {
            if (_tableHost == null) return;
            _tableHost.Clear();
            _tableHost.Add(BuildHeaderRow());
            foreach (var row in VisibleRows())
                _tableHost.Add(BuildDataRow(row));
        }

        // 列宽（px）；归属与 id 用弹性宽度，数值列固定以便纵向对齐比较
        private const int WIssue = 18, WOwner = 90, WId = 150, WCat = 70,
                          WNum = 58, WExcl = 90;

        private VisualElement BuildHeaderRow()
        {
            var header = new VisualElement();
            header.style.flexDirection     = FlexDirection.Row;
            header.style.alignItems        = Align.Center;
            header.style.paddingLeft       = 8;
            header.style.paddingRight      = 8;
            header.style.paddingBottom     = 3;
            header.style.borderBottomWidth = 1;
            header.style.borderBottomColor = new StyleColor(new Color(0.5f, 0.5f, 0.5f, 0.35f));

            header.Add(FixedLabel("", WIssue, bold: true));
            header.Add(SortButton("归属",   AbilityOverviewColumn.Owner,     WOwner));
            header.Add(SortButton("能力 Id", AbilityOverviewColumn.Id,       WId));
            header.Add(SortButton("类别",   AbilityOverviewColumn.Category,  WCat));
            header.Add(SortButton("射程",   AbilityOverviewColumn.Range,     WNum));
            header.Add(SortButton("权重",   AbilityOverviewColumn.Weight,    WNum));
            header.Add(SortButton("冷却",   AbilityOverviewColumn.Cooldown,  WNum));
            header.Add(SortButton("优先级", AbilityOverviewColumn.Priority,  WNum));
            header.Add(SortButton("互斥组", AbilityOverviewColumn.Exclusion, WExcl));
            return header;
        }

        private Button SortButton(string text, AbilityOverviewColumn column, int width)
        {
            string arrow = _sortColumn == column ? (_sortAscending ? " ▲" : " ▼") : "";
            var btn = new Button(() =>
            {
                if (_sortColumn == column) _sortAscending = !_sortAscending;
                else { _sortColumn = column; _sortAscending = true; }
                RebuildTable();
            })
            { text = text + arrow };

            btn.style.width           = width;
            btn.style.flexShrink      = 0;
            btn.style.fontSize        = 10;
            btn.style.marginLeft      = 0;
            btn.style.marginRight     = 0;
            btn.style.paddingLeft     = 2;
            btn.style.paddingRight    = 2;
            btn.style.backgroundColor = StyleKeyword.None;
            btn.style.borderTopWidth = btn.style.borderBottomWidth = 0;
            btn.style.borderLeftWidth = btn.style.borderRightWidth = 0;
            btn.style.unityTextAlign  = TextAnchor.MiddleLeft;
            return btn;
        }

        private VisualElement BuildDataRow(AbilityOverviewRow r)
        {
            bool isSelected = _selected != null && r.Asset == _selected;

            var row = new VisualElement();
            row.style.flexDirection   = FlexDirection.Row;
            row.style.alignItems      = Align.Center;
            row.style.paddingTop      = 2;
            row.style.paddingBottom   = 2;
            row.style.paddingLeft     = 8;
            row.style.paddingRight    = 8;
            row.style.backgroundColor = isSelected
                ? new StyleColor(new Color(0.25f, 0.5f, 1f, 0.2f))
                : StyleKeyword.None;

            var issue = FixedLabel(r.HasIssue ? "⚠" : "", WIssue);
            if (r.HasIssue)
            {
                issue.style.color = new StyleColor(new Color(1f, 0.45f, 0.2f));
                issue.tooltip     = r.Issue;      // 悬停看原因，不占列宽
            }
            row.Add(issue);

            row.Add(FixedLabel(r.Owner, WOwner));
            row.Add(FixedLabel(string.IsNullOrEmpty(r.Id) ? "(未命名)" : r.Id, WId));
            row.Add(FixedLabel(r.Category.ToString(), WCat));
            row.Add(FixedLabel(Num(r.Range),    WNum));
            row.Add(FixedLabel(Num(r.Weight),   WNum));
            row.Add(FixedLabel(Num(r.Cooldown), WNum));
            row.Add(FixedLabel(r.Priority.ToString(), WNum));
            row.Add(FixedLabel(string.IsNullOrEmpty(r.Exclusion) ? "-" : r.Exclusion, WExcl));

            row.RegisterCallback<MouseDownEvent>(_ =>
            {
                _selected = r.Asset;
                _onSelected?.Invoke(r.Asset);
            });
            return row;
        }

        private static string Num(float v) => v.ToString("0.##");

        private static Label FixedLabel(string text, int width, bool bold = false)
        {
            var lbl = new Label(text);
            lbl.style.width      = width;
            lbl.style.flexShrink = 0;
            lbl.style.fontSize   = 11;
            if (bold) lbl.style.unityFontStyleAndWeight = FontStyle.Bold;
            return lbl;
        }

        private void UpdateSummary()
        {
            if (_summaryLabel == null) return;
            int total  = _rows.Count;
            int issues = _rows.Count(r => r.HasIssue);
            int shown  = VisibleRows().Count();
            _summaryLabel.text = issues > 0
                ? $"共 {total} 个能力 · 有问题 {issues} 个 · 当前显示 {shown}"
                : $"共 {total} 个能力 · 无问题 · 当前显示 {shown}";
        }

        private static void OpenCharacterWizard()
        {
            // 与脚手架保持单一入口：能力的类型化子类与目标目录都由向导保证
            var type = typeof(EnemyAbilityModule).Assembly.GetType("BaseGames.Editor.CharacterWizardWindow");
            if (type != null) { EditorWindow.GetWindow(type).Show(); return; }
            EditorUtility.DisplayDialog("未找到角色向导",
                "没有找到 CharacterWizardWindow。请从菜单打开角色向导创建能力资产。", "确定");
        }
    }
}