#if UNITY_EDITOR || DEVELOPMENT_BUILD
using UnityEngine;
using BaseGames.Enemies.Abilities;
using BaseGames.Enemies.StatusEffects;

namespace BaseGames.Enemies
{
    /// <summary>
    /// 运行时 AI 状态调试叠加层（仅 Editor）。
    /// 挂到敌人 Prefab 根节点，运行时在场景视图 / GameView 上显示：
    ///   - AiPhase / EnemyStateType
    ///   - 当前激活的能力名称及运行状态
    ///   - LOS 状态 / 到玩家距离
    ///   - Boss：技能执行状态 + 各技能冷却倒计时
    /// </summary>
    [AddComponentMenu("BaseGames/Debug/Enemy Debug Overlay")]
    public sealed class EnemyDebugOverlay : MonoBehaviour
    {
        [Header("显示选项")]
        [Tooltip("在 Scene 视图中绘制 GUI 标签")]
        [SerializeField] private bool _showInSceneView = true;
        [Tooltip("在 Game 视图中绘制 GUI 标签（需要 OnGUI）")]
        [SerializeField] private bool _showInGameView  = false;
        [Tooltip("文字背景透明度")]
        [SerializeField, Range(0f, 1f)] private float _bgAlpha = 0.65f;

        private EnemyBase   _enemy;
        private BossBase    _boss;
        private EnemyStatusEffectManager _statusMgr;

        private GUIStyle    _labelStyle;
        private GUIStyle    _boxStyle;
        private bool        _stylesInit;

        private void Awake()
        {
            _enemy     = GetComponent<EnemyBase>();
            _boss      = GetComponent<BossBase>();
            _statusMgr = GetComponent<EnemyStatusEffectManager>();
        }

        // ── Scene 视图标签（UnityEditor.Handles.Label）─────────────────────
        private void OnDrawGizmos()
        {
            if (!_showInSceneView || !Application.isPlaying || _enemy == null) return;

            var lines  = BuildLines();
            var label  = string.Join("\n", lines);
            var pos    = transform.position + Vector3.up * 2.2f;

            UnityEditor.Handles.Label(pos, label);
        }

        // ── Game 视图 GUI（OnGUI）──────────────────────────────────────────
        private void OnGUI()
        {
            if (!_showInGameView || !Application.isPlaying || _enemy == null) return;

            InitStyles();

            var cam = UnityEngine.Camera.main;
            if (cam == null) return;

            Vector3 worldPos = transform.position + Vector3.up * 2.2f;
            Vector3 screen   = cam.WorldToScreenPoint(worldPos);
            if (screen.z < 0f) return;

            float screenY = Screen.height - screen.y;
            var   lines   = BuildLines();
            var   text    = string.Join("\n", lines);
            var   size    = _labelStyle.CalcSize(new GUIContent(text));
            var   rect    = new Rect(screen.x - size.x * 0.5f, screenY - size.y, size.x + 8f, size.y + 4f);

            GUI.Box(rect, GUIContent.none, _boxStyle);
            GUI.Label(rect, text, _labelStyle);
        }

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

        private System.Collections.Generic.List<string> BuildLines()
        {
            var list = new System.Collections.Generic.List<string>(8);

            // 名称
            list.Add($"<b>{gameObject.name}</b>");

            // AiPhase + EnemyState
            list.Add($"Phase: <color=#ffcc44>{_enemy.CurrentAiPhase}</color>  State: <color=#88ddff>{_enemy.CurrentState}</color>");

            // 距离 + LOS
            float dist = _enemy.Stats != null ? Mathf.Sqrt(_enemy.Stats.SqrDistanceToPlayer) : -1f;
            bool  los  = _enemy.IsPlayerVisible();
            var   losColor = los ? "#44ff88" : "#ff6644";
            list.Add($"Dist: {dist:F1}m  LOS: <color={losColor}>{los}</color>");

            // 当前激活能力
            if (_enemy.Abilities != null)
            {
                foreach (var ab in _enemy.Abilities.All)
                {
                    if (ab.IsRunning)
                    {
                        string abilityId = ab.Config?.abilityId ?? ab.GetType().Name;
                        list.Add($"Ability: <color=#ffaa44>{abilityId}</color> [{ab.Phase}]");
                    }
                }
            }

            // Boss 信息
            if (_boss != null)
            {
                list.Add($"BossSkillExec: <color={(  _boss.IsBossSkillExecuting ? "#ff4444" : "#aaaaaa")}>{_boss.IsBossSkillExecuting}</color>");
            }

            // 状态效果
            if (_statusMgr != null)
            {
                var effects = _statusMgr.ActiveEffects;
                for (int i = 0; i < effects.Count; i++)
                    list.Add($"FX: <color=#dd88ff>{effects[i].Type}</color>");
            }

            return list;
        }

        private void InitStyles()
        {
            if (_stylesInit) return;
            _stylesInit = true;

            _labelStyle = new GUIStyle(GUI.skin.label)
            {
                richText  = true,
                fontSize  = 11,
                alignment = TextAnchor.UpperLeft,
                padding   = new RectOffset(4, 4, 2, 2),
            };
            _labelStyle.normal.textColor = Color.white;

            var bgTex = new Texture2D(1, 1);
            bgTex.SetPixel(0, 0, new Color(0.05f, 0.05f, 0.1f, _bgAlpha));
            bgTex.Apply();

            _boxStyle = new GUIStyle(GUI.skin.box);
            _boxStyle.normal.background = bgTex;
        }
    }
}
#endif