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

namespace BaseGames.Editor.Modules
{
    /// <summary>
    /// DataHub 对话序列模块 —— 管理 DialogueSequenceSO 资产。
    /// </summary>
    public class DialogueModule : IDataModule
    {
        private const string Folder = "Assets/_Game/Data/Dialogue";
        private const string Prefix = "DLG_";

        public string ModuleId    => "dialogue";
        public string DisplayName => "对话";
        public string IconName    => "d_UnityEditor.ConsoleWindow";

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

        public void Initialize()
        {
            _listPane = new SoListPane<DialogueSequenceSO>(
                Folder, Prefix,
                s =>
                {
                    int v = s.variants != null ? s.variants.Length : 0;
                    return v > 0 ? $"{v}变体" : null;
                });
        }

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

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

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

            if (_selected == null) return;

            container.Add(BuildInfoCard(_selected));
            container.Add(BuildLinesPreview(_selected));
            if (_selected.variants != null && _selected.variants.Length > 0)
                container.Add(BuildVariantsCard(_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(DialogueSequenceSO s)
        {
            var card = SkillModule.MakeCard();
            int lineCount    = s.lines    != null ? s.lines.Length    : 0;
            int variantCount = s.variants != null ? s.variants.Length : 0;

            SkillModule.AddChip(card, "ID",     string.IsNullOrEmpty(s.sequenceId) ? "(未设置)" : s.sequenceId);
            SkillModule.AddChip(card, "行数",   lineCount.ToString());
            if (variantCount > 0)
                SkillModule.AddChip(card, "变体数", variantCount.ToString());
            return card;
        }

        private static VisualElement BuildLinesPreview(DialogueSequenceSO s)
        {
            var section = new VisualElement();
            section.style.paddingLeft   = 12;
            section.style.paddingRight  = 12;
            section.style.paddingTop    = 6;
            section.style.paddingBottom = 6;

            var title = new Label("对话预览（前 5 行）");
            title.style.fontSize  = 11;
            title.style.opacity   = 0.55f;
            title.style.marginBottom = 4;
            title.style.unityFontStyleAndWeight = FontStyle.Bold;
            section.Add(title);

            if (s.lines == null || s.lines.Length == 0)
            {
                var empty = new Label("（无对话行）");
                empty.style.opacity  = 0.4f;
                empty.style.fontSize = 11;
                section.Add(empty);
                return section;
            }

            int preview = Mathf.Min(5, s.lines.Length);
            for (int i = 0; i < preview; i++)
            {
                var line = s.lines[i];
                var row  = new VisualElement();
                row.style.flexDirection  = FlexDirection.Row;
                row.style.alignItems     = Align.Center;
                row.style.marginBottom   = 3;

                // 头像图标（actor 优先，回退到直接字段）
                var portrait = line.ResolvedPortrait;
                if (portrait != null)
                {
                    var img = new Image { image = portrait.texture };
                    img.style.width       = 18;
                    img.style.height      = 18;
                    img.style.marginRight = 4;
                    img.style.borderTopLeftRadius     = 2;
                    img.style.borderTopRightRadius    = 2;
                    img.style.borderBottomLeftRadius  = 2;
                    img.style.borderBottomRightRadius = 2;
                    row.Add(img);
                }

                // 语音图标
                if (line.voiceClip != null)
                {
                    var ico = EditorGUIUtility.IconContent("d_AudioClip Icon");
                    if (ico?.image != null)
                    {
                        var img = new Image { image = ico.image };
                        img.style.width       = 14;
                        img.style.height      = 14;
                        img.style.marginRight = 4;
                        row.Add(img);
                    }
                }

                // 说话人（actor 优先，回退到直接字段）
                string speakerKey = line.ResolvedNameKey;
                if (!string.IsNullOrEmpty(speakerKey))
                {
                    var spk = new Label(speakerKey + ":");
                    spk.style.fontSize  = 11;
                    spk.style.opacity   = 0.55f;
                    spk.style.unityFontStyleAndWeight = FontStyle.Bold;
                    spk.style.marginRight = 4;
                    spk.style.flexShrink  = 0;
                    row.Add(spk);
                }

                // 文本 key（尝试显示本地化实际内容，回退到 key 本身）
                string rawText  = string.IsNullOrEmpty(line.textKey) ? "(空)" : line.textKey;
                string preview  = string.IsNullOrEmpty(line.textKey)
                    ? "(空)"
                    : (BaseGames.Localization.LocalizationManager.GetEditorPreview(line.textKey, "Dialogue") ?? rawText);
                if (preview.Length > 48) preview = preview[..48] + "…";
                var lbl = new Label(preview);
                lbl.style.fontSize = 11;
                lbl.style.overflow = Overflow.Hidden;
                row.Add(lbl);

                section.Add(row);
            }

            if (s.lines.Length > preview)
            {
                var more = new Label($"… 还有 {s.lines.Length - preview} 行");
                more.style.opacity  = 0.4f;
                more.style.fontSize = 10;
                section.Add(more);
            }

            return section;
        }

        private static VisualElement BuildVariantsCard(DialogueSequenceSO s)
        {
            var card = SkillModule.MakeCard();
            card.style.flexDirection = FlexDirection.Column;

            var title = new Label("条件变体");
            title.style.fontSize     = 11;
            title.style.opacity      = 0.55f;
            title.style.marginBottom = 4;
            title.style.unityFontStyleAndWeight = FontStyle.Bold;
            card.Add(title);

            foreach (var v in s.variants)
            {
                var row = new VisualElement();
                row.style.flexDirection = FlexDirection.Row;
                row.style.marginBottom  = 2;

                string flags = v.requiredFlags != null && v.requiredFlags.Length > 0
                    ? string.Join(", ", v.requiredFlags)
                    : "(无条件)";
                SkillModule.AddChip(row, "条件",   flags);
                SkillModule.AddChip(row, "替换序列", v.sequence != null ? v.sequence.name : "(未设置)");
                card.Add(row);
            }
            return card;
        }

        private VisualElement BuildActionBar(DialogueSequenceSO s)
        {
            return SkillModule.BuildStandardActionBar(
                s, Folder, Prefix,
                onCreated: c => _listPane.Refresh(c),
                onCloned:  c => _listPane.Refresh(c),
                onDeleted:   () => _listPane.Refresh(null));
        }
    }
}