using System.Collections.Generic;
using UnityEditor;
using UnityEngine;
using BaseGames.Boss;

namespace BaseGames.Editor
{
    /// <summary>
    /// Boss 技能序列甘特图可视化窗口（架构 23_BossSkillModule §12）。
    /// 菜单：BaseGames/Tools/Boss Skill Sequence Viewer
    ///
    /// 功能：
    /// - 拖放 BossSkillSO 或 SkillSequenceSO 资产加载
    /// - 甘特图：Windup（黄色）→ Active（红色）→ Recovery（灰色）各阶段时序条
    /// - VulnerabilityWindow 绿色覆盖层（TriggerDelay 偏移 + Duration 宽度）
    /// - DurationNormalized &lt; 0.1 时阶段条变红警告
    /// - 点击阶段条高亮对应 AttackPatternSO（EditorGUIUtility.PingObject）
    /// </summary>
    public class BossSkillSequenceWindow : EditorWindow
    {
        // ── State ──────────────────────────────────────────────────────────
        private BossSkillSO    _loadedSkill;
        private SkillSequenceSO _loadedSequence;
        private Vector2        _scrollPos;

        // ── Layout ─────────────────────────────────────────────────────────
        private const float HeaderH      = 24f;
        private const float RowH         = 28f;
        private const float LabelW       = 180f;
        private const float MinBarWidth  = 6f;
        // 时间轴宽度随窗口宽度动态调整，最小 300px
        private float TimelineW => Mathf.Max(300f, position.width - LabelW - 30f);

        // ── Colors ─────────────────────────────────────────────────────────
        private static readonly Color ColWindup   = new Color(0.95f, 0.80f, 0.10f, 0.85f);
        private static readonly Color ColActive   = new Color(0.90f, 0.20f, 0.15f, 0.85f);
        private static readonly Color ColRecovery = new Color(0.50f, 0.50f, 0.55f, 0.70f);
        private static readonly Color ColVuln     = new Color(0.10f, 0.90f, 0.30f, 0.45f);
        private static readonly Color ColDelay    = new Color(0.25f, 0.25f, 0.30f, 0.50f);
        private static readonly Color ColWarn     = new Color(0.95f, 0.10f, 0.10f, 0.85f);

        [MenuItem("BaseGames/Tools/Boss Skill Sequence Viewer")]
        public static void OpenWindow()
        {
            var win = GetWindow<BossSkillSequenceWindow>("Boss Skill Sequence");
            win.minSize = new Vector2(900, 400);
            win.Show();
        }

        // ── GUI ────────────────────────────────────────────────────────────

        private void OnGUI()
        {
            DrawToolbar();

            if (_loadedSkill == null && _loadedSequence == null)
            {
                EditorGUILayout.HelpBox(
                    "将 BossSkillSO 或 SkillSequenceSO 资产拖放到此处，或使用上方字段加载。",
                    MessageType.Info);
                HandleDragDrop();
                return;
            }

            _scrollPos = EditorGUILayout.BeginScrollView(_scrollPos);

            if (_loadedSkill != null)
                DrawSkillTimeline(_loadedSkill);
            else if (_loadedSequence != null)
                DrawSequenceTimeline(_loadedSequence);

            EditorGUILayout.EndScrollView();
        }

        // ── Toolbar ───────────────────────────────────────────────────────

        private void DrawToolbar()
        {
            EditorGUILayout.BeginHorizontal(EditorStyles.toolbar);

            EditorGUILayout.LabelField("技能:", GUILayout.Width(36));
            var newSkill = (BossSkillSO)EditorGUILayout.ObjectField(
                _loadedSkill, typeof(BossSkillSO), false, GUILayout.Width(200));
            if (newSkill != _loadedSkill)
            {
                _loadedSkill     = newSkill;
                _loadedSequence  = null;
            }

            GUILayout.Space(12);
            EditorGUILayout.LabelField("序列:", GUILayout.Width(36));
            var newSeq = (SkillSequenceSO)EditorGUILayout.ObjectField(
                _loadedSequence, typeof(SkillSequenceSO), false, GUILayout.Width(200));
            if (newSeq != _loadedSequence)
            {
                _loadedSequence = newSeq;
                _loadedSkill    = null;
            }

            GUILayout.FlexibleSpace();

            if (GUILayout.Button("清除", EditorStyles.toolbarButton, GUILayout.Width(50)))
            {
                _loadedSkill    = null;
                _loadedSequence = null;
            }

            EditorGUILayout.EndHorizontal();
        }

        // ── BossSkillSO 时间轴 ────────────────────────────────────────────

        private void DrawSkillTimeline(BossSkillSO skill)
        {
            EditorGUILayout.LabelField($"技能：{skill.displayName}  [{skill.skillId}]",
                EditorStyles.boldLabel);
            EditorGUILayout.Space(4);

            if (skill.attackPatterns == null || skill.attackPatterns.Length == 0)
            {
                EditorGUILayout.HelpBox("此技能没有 AttackPattern。", MessageType.Warning);
                return;
            }

            // 计算总时长
            float totalDuration = 0f;
            foreach (var p in skill.attackPatterns)
                if (p != null) totalDuration += p.WindupDuration + p.ActiveDuration + p.RecoveryDuration;

            if (totalDuration <= 0f) totalDuration = 1f;

            DrawTimelineHeader(totalDuration);

            float cursor = 0f;
            for (int i = 0; i < skill.attackPatterns.Length; i++)
            {
                var pattern = skill.attackPatterns[i];
                if (pattern == null) continue;
                DrawPatternRow($"[{i}] {pattern.name}", pattern, ref cursor, totalDuration);
            }

            // 绘制 VulnerabilityWindows
            if (skill.vulnerabilityWindows != null && skill.vulnerabilityWindows.Length > 0)
            {
                EditorGUILayout.Space(4);
                EditorGUILayout.LabelField("弱点窗口（Vulnerability Windows）", EditorStyles.miniBoldLabel);
                foreach (var vw in skill.vulnerabilityWindows)
                    DrawVulnWindowRow(vw, totalDuration);
            }
        }

        // ── SkillSequenceSO 时间轴 ────────────────────────────────────────

        private void DrawSequenceTimeline(SkillSequenceSO sequence)
        {
            EditorGUILayout.LabelField($"序列：{sequence.name}", EditorStyles.boldLabel);
            EditorGUILayout.Space(4);

            if (sequence.steps == null || sequence.steps.Length == 0)
            {
                EditorGUILayout.HelpBox("此序列没有步骤。", MessageType.Warning);
                return;
            }

            // 计算总时长
            float totalDuration = 0f;
            foreach (var step in sequence.steps)
            {
                totalDuration += step.delayBeforeStep;
                if (step.pattern != null)
                    totalDuration += step.pattern.WindupDuration + step.pattern.ActiveDuration + step.pattern.RecoveryDuration;
            }
            if (totalDuration <= 0f) totalDuration = 1f;

            DrawTimelineHeader(totalDuration);

            float cursor = 0f;
            for (int i = 0; i < sequence.steps.Length; i++)
            {
                var step = sequence.steps[i];

                // 延迟条
                if (step.delayBeforeStep > 0f)
                {
                    DrawBar($"延迟 {step.delayBeforeStep:F2}s", cursor, step.delayBeforeStep,
                        totalDuration, ColDelay, null);
                    cursor += step.delayBeforeStep;
                }

                if (step.pattern != null)
                    DrawPatternRow($"[{i}] {step.pattern.name}", step.pattern, ref cursor, totalDuration);
            }
        }

        // ── 共用绘制方法 ──────────────────────────────────────────────────

        private void DrawTimelineHeader(float totalDuration)
        {
            Rect headerRect = EditorGUILayout.GetControlRect(false, HeaderH);
            headerRect.x     += LabelW;
            headerRect.width -= LabelW;

            EditorGUI.DrawRect(headerRect, new Color(0.18f, 0.18f, 0.20f));

            // 刻度线（每 0.5s 一条）
            float step = 0.5f;
            for (float t = 0; t <= totalDuration + 0.001f; t += step)
            {
                float x = headerRect.x + (t / totalDuration) * headerRect.width;
                EditorGUI.DrawRect(new Rect(x, headerRect.y, 1f, HeaderH * 0.6f), Color.gray);
                EditorGUI.LabelField(new Rect(x + 2f, headerRect.y, 40f, HeaderH),
                    $"{t:F1}s", new GUIStyle(EditorStyles.miniLabel) { normal = { textColor = Color.gray } });
            }
        }

        private void DrawPatternRow(string label, AttackPatternSO pattern, ref float cursor, float totalDuration)
        {
            float windupDur   = pattern.WindupDuration;
            float activeDur   = pattern.ActiveDuration;
            float recoveryDur = pattern.RecoveryDuration;

            float rowStart = cursor;
            EditorGUILayout.BeginHorizontal(GUILayout.Height(RowH));

            // 标签 + Ping
            if (GUILayout.Button(label, EditorStyles.miniLabel, GUILayout.Width(LabelW), GUILayout.Height(RowH)))
                EditorGUIUtility.PingObject(pattern);

            Rect timelineRect = EditorGUILayout.GetControlRect(false, RowH,
                GUILayout.Width(TimelineW));

            // Windup
            if (windupDur > 0f)
                DrawBarInRect(timelineRect, cursor, windupDur, totalDuration,
                    windupDur / (windupDur + activeDur + recoveryDur) < 0.1f ? ColWarn : ColWindup);
            cursor += windupDur;

            // Active
            if (activeDur > 0f)
                DrawBarInRect(timelineRect, cursor, activeDur, totalDuration,
                    activeDur / (windupDur + activeDur + recoveryDur) < 0.1f ? ColWarn : ColActive);
            cursor += activeDur;

            // Recovery
            if (recoveryDur > 0f)
                DrawBarInRect(timelineRect, cursor, recoveryDur, totalDuration,
                    recoveryDur / (windupDur + activeDur + recoveryDur) < 0.1f ? ColWarn : ColRecovery);
            cursor += recoveryDur;

            _ = rowStart; // suppress unused warning
            EditorGUILayout.EndHorizontal();
        }

        private void DrawVulnWindowRow(VulnerabilityWindow vw, float totalDuration)
        {
            string label = $"弱点：{vw.TriggerType} +{vw.TriggerDelay:F2}s / {vw.Duration:F2}s";
            DrawBar(label, vw.TriggerDelay, vw.Duration, totalDuration, ColVuln, null);
        }

        private void DrawBar(string label, float start, float duration, float totalDuration,
            Color color, AttackPatternSO pingTarget)
        {
            EditorGUILayout.BeginHorizontal(GUILayout.Height(RowH));

            if (GUILayout.Button(label, EditorStyles.miniLabel, GUILayout.Width(LabelW), GUILayout.Height(RowH)))
            {
                if (pingTarget != null) EditorGUIUtility.PingObject(pingTarget);
            }

            Rect timelineRect = EditorGUILayout.GetControlRect(false, RowH, GUILayout.Width(TimelineW));
            DrawBarInRect(timelineRect, start, duration, totalDuration, color);

            EditorGUILayout.EndHorizontal();
        }

        private static void DrawBarInRect(Rect timeline, float start, float duration,
            float totalDuration, Color color)
        {
            float x = timeline.x + (start / totalDuration) * timeline.width;
            float w = Mathf.Max(MinBarWidth, (duration / totalDuration) * timeline.width);
            EditorGUI.DrawRect(new Rect(x, timeline.y + 2f, w, timeline.height - 4f), color);
        }

        // ── Drag & Drop ───────────────────────────────────────────────────

        private void HandleDragDrop()
        {
            var evt = Event.current;
            if (evt.type != EventType.DragUpdated && evt.type != EventType.DragPerform) return;

            DragAndDrop.visualMode = DragAndDropVisualMode.Copy;

            if (evt.type == EventType.DragPerform)
            {
                DragAndDrop.AcceptDrag();
                foreach (var obj in DragAndDrop.objectReferences)
                {
                    if (obj is BossSkillSO skill)    { _loadedSkill = skill; _loadedSequence = null; break; }
                    if (obj is SkillSequenceSO seq)  { _loadedSequence = seq; _loadedSkill = null; break; }
                }
                Repaint();
            }
            evt.Use();
        }
    }
}