using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using Unity.Cinemachine;
using BaseGames.Core;
using BaseGames.Core.Events;

namespace BaseGames.Camera
{
    /// <summary>
    /// 相机状态单例控制器。须放置在 Persistent 场景中。
    ///
    /// 每个 <see cref="CameraArea"/> 均拥有自己专属的 <c>DedicatedCamera</c>，
    /// 进入区域时调用 <see cref="ActivateDedicated"/> 激活对应 VCam，
    /// Cinemachine Brain 自动处理混合过渡。
    /// </summary>
    [DefaultExecutionOrder(-100)]
    public class CameraStateController : MonoBehaviour, ICameraService
    {
        [Header("引用")]
        [SerializeField] private CinemachineBrain         _brain;
        [SerializeField] private CinemachineImpulseSource _impulseSource;
        [SerializeField] private CameraLookSystem         _lookSystem;


        [Header("默认混合配置")]
        [SerializeField] private CameraBlendProfileSO _defaultBlendProfile;

        [Header("镜头配置")]
        [Tooltip("相机镜头参数 SO，提供 FOV 与相机深度。\n" +
                 "与各 CameraArea 引用同一资产，确保 SetLensSize 换算结果与 VCam 配置一致。")]
        [SerializeField] private CameraLensConfigSO _lensConfig;

        [Header("玩家跟随")]
        [Tooltip("PlayerController 生成时广播的事件频道（EVT_PlayerSpawned）。\n" +
                 "收到后自动查找 CameraFollowTarget 子节点并作为 VCam Follow 赋值。")]
        [SerializeField] private TransformEventChannelSO _onPlayerSpawned;

        // ── 状态 ──────────────────────────────────────────────────────────────
        private CameraArea            _roomBaselineArea;                                           // SwitchArea(priority=0) 写入的房间基线，不被触发事件删除
        private readonly List<(CameraArea area, int priority)> _activeZones = new();               // 玩家当前所在的触发区域集合（priority>0）
        private CameraArea            _currentArea;
        private CinemachineCamera     _activeDedicatedCam;
        private CinemachineCamera     _cutsceneCamera;            // 过场模式专用高优先级 VCam
        private const int             CutscenePriority = 100;    // 高于专有区域 VCam（默认 20）
        private int                   _lastExternalFacing = 0;   // 最近一次 SetPlayerFacing 的值，用于新激活 VCam 的初始化
        private Transform             _currentFollowTarget;       // 最后一次 SetFollowTarget 设置的目标，激活 VCam 时自动同步
        private readonly CompositeDisposable _subs = new();

        // ── Lifecycle ────────────────────────────────────────────────────────

        private void Awake()
        {
            if (ServiceLocator.GetOrDefault<ICameraService>() != null) { Destroy(gameObject); return; }
            ServiceLocator.Register<ICameraService>(this);

            // 重置运行时状态，防止禁用 Domain Reload 时上一次 Play Mode 的数据残留。
            // 非序列化字段在 Domain Reload 禁用时不会自动清零。
            _roomBaselineArea    = null;
            _activeZones.Clear();
            _currentArea         = null;
            _activeDedicatedCam  = null;
            _lastExternalFacing  = 0;
            _currentFollowTarget = null;

            // 订阅 PlayerSpawned 事件，运行时自动为 VCam 赋值 Follow
            _onPlayerSpawned?.Subscribe(OnPlayerSpawned).AddTo(_subs);
        }

        private void OnDestroy()
        {
            _subs.Dispose();
            ServiceLocator.Unregister<ICameraService>(this);
        }

        private void OnPlayerSpawned(Transform playerRoot)
        {
            const string followNodeName = "CameraFollowTarget";
            Transform follow = playerRoot.Find(followNodeName) ?? playerRoot;
            SetFollowTarget(follow);
        }

        private void Start()
        {
            // 场景启动时扫描全部 VCam，提前暴露组件顺序错误，
            // 无需等待各区域被激活才触发检测。
            var allVCams = FindObjectsByType<CinemachineCamera>(FindObjectsSortMode.None);
            foreach (var vcam in allVCams)
            {
                var confiner = vcam.GetComponent<CinemachineConfiner3D>();
                if (confiner != null)
                    ValidateVCamExtensionOrder(vcam, confiner);
            }
        }

        // ── 公开 API ──────────────────────────────────────────────────────────

        /// <summary>
        /// 切换到目标相机区域。<paramref name="priority"/> &lt; 当前激活优先级时忽略。
        /// <para>priority = 0：始终执行（适合 RoomController 入场初始化）。</para>
        /// </summary>
        public void SwitchArea(CameraArea area, int priority = 0, bool instantCut = false)
        {
            if (area == null) return;

            if (priority == 0)
            {
                // 房间初始化 / 无条件切换：记录基线并清空触发集合
                _roomBaselineArea = area;
                _activeZones.Clear();
                ActivateArea(area, instantCut);
                return;
            }

            // 触发区域进入：更新集合（同一区域去重后重新加入，保证最新优先级）
            _activeZones.RemoveAll(e => e.area == area);
            _activeZones.Add((area, priority));

            // 仅当此区域是当前最优且尚未激活时才切换
            CameraArea best = GetEffectiveArea();
            if (best == area && area != _currentArea)
                ActivateArea(area, instantCut);
        }

        /// <summary>
        /// 释放 <paramref name="releasedArea"/> 的权限。
        /// 从优先级栈中移除该区域；若它是当前激活区域，则激活新栈顶（或 fallback）。
        /// </summary>
        public void ReleaseArea(CameraArea releasedArea, CameraArea fallback)
        {
            if (releasedArea == null) return;

            bool wasActive = releasedArea == _currentArea;
            int  removed   = _activeZones.RemoveAll(e => e.area == releasedArea);
            // 若区域本就不在栈中，且又不是当前激活区，则无需任何操作
            if (removed == 0 && !wasActive) return;

            if (!wasActive) return;

            // 回退到当前最优区域（触发集合 → 房间基线 → fallback）
            CameraArea next = GetEffectiveArea() ?? fallback;
            if (next != null && next != _currentArea)
                ActivateArea(next, instantCut: false);
        }

        /// <summary>
        /// 返回当前应激活的区域：<see cref="_activeZones"/> 中优先级最高的
        /// （同优先级取最近进入的），若触发集合为空则回退到 <see cref="_roomBaselineArea"/>。
        /// </summary>
        private CameraArea GetEffectiveArea()
        {
            CameraArea best = null;
            int bestPriority = -1;
            foreach (var (a, p) in _activeZones)
                if (p >= bestPriority) { bestPriority = p; best = a; }
            return best ?? _roomBaselineArea;
        }

        private void ActivateArea(CameraArea area, bool instantCut = false)
        {
            _currentArea = area;

            if (instantCut)
            {
                // 房间入口硬切：相机立即跳到新房间位置，无混合动画
                if (_brain != null)
                    _brain.DefaultBlend = new CinemachineBlendDefinition
                    {
                        Style = CinemachineBlendDefinition.Styles.Cut,
                        Time  = 0f,
                    };
                // 重置窥视偏移，避免旧房间的窥视状态残留
                _lookSystem?.ResetOffsets(snap: true);
                // 重置专属 VCam 扩展的内部状态，防止旧房间的速度/阻尼估算带入新房间
                if (area.HasDedicated) ResetVCamExtensions(area.DedicatedCamera);
            }
            else
            {
                ApplyBlendProfile(area.BlendProfile ?? _defaultBlendProfile);
            }

            if (area.LensSize > 0f)
                SetLensSize(area.LensSize, area.LensSizeDuration);

            if (area.HasDedicated)
                ActivateDedicated(area);
            else
                Debug.LogError($"[CameraStateController] {area.name} 缺少专属 VCam！请通过 Camera Area Setup 工具为此区域创建 DedicatedCamera。");
        }

        /// <summary>
        /// 运行时设置跟随目标。
        /// 若存在 <see cref="CameraLookSystem"/>，VCam 跟随系统输出的虚拟目标（含窗斥偏移）。
        /// </summary>
        public void SetFollowTarget(Transform followTarget)
        {
            Transform actual = followTarget;
            if (_lookSystem != null)
            {
                _lookSystem.SetBaseTarget(followTarget);
                actual = _lookSystem.VirtualTarget;
            }
            _currentFollowTarget = actual;
            SyncFollowToVCam(_activeDedicatedCam); // 立即同步到当前活跃专有 VCam
        }

        /// <summary>触发屏幕抖动。</summary>
        public void TriggerImpulse(Vector3 velocity)
        {
            if (_impulseSource != null) _impulseSource.GenerateImpulse(velocity);
        }

        /// <summary>以默认强度触发屏幕抖动。</summary>
        public void TriggerImpulse(float strength = 0.3f)
            => TriggerImpulse(Vector3.down * strength);

        /// <summary>
        /// 平滑过渡视野尺寸（可视半高，世界单位）。<paramref name="duration"/> = 0 时瞬间切换。
        /// 透视相机下自动换算为 FOV；语义等价于正交相机 OrthographicSize。
        /// 区域进入时由 <see cref="CameraArea"/> 自动调用；游戏代码也可直接调用。
        /// </summary>
        public void SetLensSize(float visibleHalfHeight, float duration = 0f)
        {
            if (_lensCoroutine != null) StopCoroutine(_lensCoroutine);
            if (duration <= 0f) { ApplyLensSizeToAll(visibleHalfHeight); return; }
            _lensCoroutine = StartCoroutine(LensSizeCo(visibleHalfHeight, duration));
        }

        /// <summary>
        /// 进入过场模式，将指定 VCam 提升至最高优先级，Brain 自动混合到它。
        /// <para>
        /// 过场 VCam 由设计者在 Inspector 中预先配置（位置、Follow、LookAt、Lens 等）；
        /// 此方法不强制覆写 Follow，保留 Inspector 配置不变。
        /// </para>
        /// <para>适用场景：Boss 登场固定镜头、对话拉近、剧情事件全景等。</para>
        /// </summary>
        public void EnterCutsceneMode(CinemachineCamera cutsceneCamera)
        {
            if (cutsceneCamera == null) return;
            if (_cutsceneCamera != null && _cutsceneCamera != cutsceneCamera)
                _cutsceneCamera.Priority = 0;
            _cutsceneCamera          = cutsceneCamera;
            _cutsceneCamera.Priority = CutscenePriority;
        }

        /// <summary>
        /// 退出过场模式，撤销过场 VCam 的优先级，Brain 自动混合回当前区域相机。
        /// </summary>
        public void ExitCutsceneMode()
        {
            if (_cutsceneCamera == null) return;
            _cutsceneCamera.Priority = 0;
            _cutsceneCamera          = null;
        }

        /// <summary>
        /// 通知相机系统玩家的面朝方向，转发至所有活跃 VCam 的方向偏置扩展。
        /// 由 PlayerController 在精灵翻转时调用：<c>ICameraService.SetPlayerFacing(翻转方向 ? +1 : -1)</c>。
        /// </summary>
        public void SetPlayerFacing(int direction)
        {
            _lastExternalFacing = direction;
            SetFacingOnVCam(_activeDedicatedCam, direction);
        }

        private static void SetFacingOnVCam(CinemachineCamera vcam, int direction)
            => vcam?.GetComponent<CameraFacingBiasExtension>()?.SetExternalFacing(direction);

        private Coroutine _lensCoroutine;

        private void ApplyLensSizeToAll(float size)
        {
            if (_activeDedicatedCam != null) SetVcamLens(_activeDedicatedCam, size);
        }

        // size = 可见半高（世界单位），透视相机下等效于正交 OrthographicSize。
        // 换算公式：FOV = 2 * atan(size / depth)
        private void SetVcamLens(CinemachineCamera vcam, float size)
        {
            if (vcam == null) return;
            var lens = vcam.Lens;
            float depth = _lensConfig != null ? _lensConfig.cameraDepth : 10f;
            lens.FieldOfView = 2f * Mathf.Atan(size / depth) * Mathf.Rad2Deg;
            vcam.Lens = lens;
        }

        private IEnumerator LensSizeCo(float target, float duration)
        {
            CinemachineCamera active = GetActiveVcam();
            if (active == null) { _lensCoroutine = null; yield break; }
            // 透视相机：从当前 FOV 反算等效可见半高，作为插值起点
            float depth   = _lensConfig != null ? _lensConfig.cameraDepth : 10f;
            float start   = depth * Mathf.Tan(active.Lens.FieldOfView * 0.5f * Mathf.Deg2Rad);
            float elapsed = 0f;
            while (elapsed < duration)
            {
                elapsed += Time.deltaTime;
                // 使用平滑过渡曲线（ease-in-out），视野缩放手感更自然。
                // 线性插值会让镜头拉远感觉机械；平滑步多出平稳的起笔和收尾弹性。
                float t = Mathf.SmoothStep(0f, 1f, Mathf.Clamp01(elapsed / duration));
                ApplyLensSizeToAll(Mathf.Lerp(start, target, t));
                yield return null;
            }
            ApplyLensSizeToAll(target);
            _lensCoroutine = null;
        }

        private CinemachineCamera GetActiveVcam() => _activeDedicatedCam;

        // ── 内部方法 ──────────────────────────────────────────────────────────

        /// <summary>激活区域的专有 VCam（高优先级）。</summary>
        private void ActivateDedicated(CameraArea area)
        {
            // 降低前一个专有 VCam（若与新的不同）
            if (_activeDedicatedCam != null && _activeDedicatedCam != area.DedicatedCamera)
                _activeDedicatedCam.Priority = 0;

            _activeDedicatedCam          = area.DedicatedCamera;
            _activeDedicatedCam.Priority = area.DedicatedPriority;
            SyncFollowToVCam(_activeDedicatedCam); // 确保专有 VCam 的 Follow 指向当前跟随目标
            SetFacingOnVCam(_activeDedicatedCam, _lastExternalFacing); // 应用当前玩家朝向

            // 应用 CameraArea 参数（Confiner、Composer、扩展组件等）
            var dedicatedConfiner = _activeDedicatedCam.GetComponent<CinemachineConfiner3D>();
            ValidateVCamExtensionOrder(_activeDedicatedCam, dedicatedConfiner);
            ConfigureSlot(_activeDedicatedCam, dedicatedConfiner, area);
        }

        /// <summary>
        /// 检查 VCam 上各扩展组件的挂载顺序是否正确。
        /// <list type="bullet">
        ///   <item>FallBiasExtension / FacingBiasExtension 必须在 CinemachineConfiner3D 之前</item>
        ///   <item>AxisLockExtension 必须在 CinemachineConfiner3D 之后</item>
        /// </list>
        /// 顺序错误时相机会在应用偏置后逃出限位区域，或轴锁被 Confiner 覆盖失效。
        /// </summary>
        private static void ValidateVCamExtensionOrder(CinemachineCamera vcam, CinemachineConfiner3D confiner)
        {
            if (vcam == null) return;

            if (confiner == null)
            {
                Debug.LogWarning(
                    $"[CameraStateController] VCam <b>{vcam.name}</b> 缺少 CinemachineConfiner3D 组件！" +
                    "相机将不受任何限位约束，请通过 CameraAreaEditor 重新生成此 VCam 或手动添加。");
                return;
            }

            Component[] comps      = vcam.GetComponents<Component>();
            int confinerIdx        = -1;
            int fallBiasIdx        = -1;
            int facingBiasIdx      = -1;
            int axisLockIdx        = -1;
            int asymDampIdx        = -1;
            int adaptiveLahIdx     = -1;

            for (int i = 0; i < comps.Length; i++)
            {
                switch (comps[i])
                {
                    case CinemachineConfiner3D            _: confinerIdx    = i; break;
                    case CameraFallBiasExtension          _: fallBiasIdx    = i; break;
                    case CameraFacingBiasExtension        _: facingBiasIdx  = i; break;
                    case CameraAxisLockExtension          _: axisLockIdx    = i; break;
                    case CameraAsymmetricDampingExtension _: asymDampIdx    = i; break;
                    case CameraAdaptiveLookaheadExtension _: adaptiveLahIdx = i; break;
                }
            }

            if (asymDampIdx   >= 0 && asymDampIdx   > confinerIdx)
                Debug.LogError(
                    $"[CameraStateController] VCam <b>{vcam.name}</b>：" +
                    "CameraAsymmetricDampingExtension 必须在 CinemachineConfiner3D 之前！" +
                    "当前顺序导致Y轴阻尼平滑值将相机推出限位区域而不被重新裁剪。" +
                    "请在 RoomCameraSetupTool 中点击「自动修正组件顺序」按钮。");

            if (fallBiasIdx   >= 0 && fallBiasIdx   > confinerIdx)
                Debug.LogError(
                    $"[CameraStateController] VCam <b>{vcam.name}</b>：" +
                    "CameraFallBiasExtension 必须在 CinemachineConfiner3D 之前！" +
                    "当前顺序导致下坠偏置将相机推出限位区域而不被重新裁剪。" +
                    "请在 RoomCameraSetupTool 中点击「自动修正组件顺序」按钮。");

            if (facingBiasIdx >= 0 && facingBiasIdx > confinerIdx)
                Debug.LogError(
                    $"[CameraStateController] VCam <b>{vcam.name}</b>：" +
                    "CameraFacingBiasExtension 必须在 CinemachineConfiner3D 之前！" +
                    "当前顺序导致朝向偏置将相机推出限位区域而不被重新裁剪。" +
                    "请在 RoomCameraSetupTool 中点击「自动修正组件顺序」按钮。");

            if (adaptiveLahIdx >= 0 && adaptiveLahIdx > confinerIdx)
                Debug.LogError(
                    $"[CameraStateController] VCam <b>{vcam.name}</b>：" +
                    "CameraAdaptiveLookaheadExtension 必须在 CinemachineConfiner3D 之前！" +
                    "请在 RoomCameraSetupTool 中点击「自动修正组件顺序」按钮。");

            if (axisLockIdx   >= 0 && axisLockIdx   < confinerIdx)
                Debug.LogError(
                    $"[CameraStateController] VCam <b>{vcam.name}</b>：" +
                    "CameraAxisLockExtension 必须在 CinemachineConfiner3D 之后！" +
                    "当前顺序导致轴向锁定被 Confiner 覆盖而失效。" +
                    "请在 RoomCameraSetupTool 中点击「自动修正组件顺序」按钮。");
        }

        /// <summary>
        /// 将最后已知的 Follow 目标同步到指定 VCam（若其 Follow 尚未设置或已过期）。
        /// </summary>
        private void SyncFollowToVCam(CinemachineCamera vcam)
        {
            if (vcam == null || _currentFollowTarget == null) return;
            if (vcam.Follow != _currentFollowTarget)
                vcam.Follow = _currentFollowTarget;
        }

        private static void ConfigureSlot(
            CinemachineCamera vcam, CinemachineConfiner3D confiner, CameraArea area)
        {
            // 1. Confiner
            if (confiner != null && area.ConfinerCollider != null)
            {
                confiner.BoundingVolume = area.ConfinerCollider;
            }
            else if (confiner != null && area.ConfinerCollider == null)
            {
                Debug.LogError(
                    $"[CameraStateController] {area.name} 未绑定 ConfinerCollider！" +
                    "请将子节点 AreaBoundary 的 BoxCollider 拖入 CameraArea._confinerCollider 字段。");
            }

            // 2. 跟随行为覆盖
            if (area.OverrideFollowBehaviour)
            {
                var composer = vcam.GetComponent<CinemachinePositionComposer>();
                if (composer != null)
                {
                    // 屏幕位置（Y 偏下 → 玩家稍低于中心，上方更多视野）
                    var comp = composer.Composition;
                    comp.ScreenPosition   = area.ScreenPosition;
                    comp.DeadZone.Enabled = true;
                    comp.DeadZone.Size    = area.DeadZoneSize;
                    composer.Composition  = comp;

                    // 阻尼
                    var d = composer.Damping;
                    d.x = area.Damping.x;
                    d.y = area.Damping.y;
                    composer.Damping = d;

                    // 非对称 Y 阻尼：若扩展存在，将其按区域配置并清零 Composer Y 阻尼防止叠加
                    var asymDamp = vcam.GetComponent<CameraAsymmetricDampingExtension>();
                    if (asymDamp != null)
                    {
                        asymDamp.DampingDown = area.DampingDown;
                        asymDamp.DampingUp   = area.DampingUp;
                        var yd = composer.Damping;
                        yd.y = 0f;
                        composer.Damping = yd;
                    }

                    // 引领预测
                    var lah = composer.Lookahead;
                    lah.Enabled   = area.LookaheadTime > 0f;
                    lah.Time      = area.LookaheadTime;
                    lah.Smoothing = area.LookaheadSmoothing;
                    lah.IgnoreY   = true;  // 平台跳跃中 Y 轴 Lookahead 会在起跳时猛拉镜头，应关闭
                    composer.Lookahead = lah;

                    // 自适应 Lookahead：通知扩展当前区域配置的最大 Lookahead 值
                    var adaptiveLah = vcam.GetComponent<CameraAdaptiveLookaheadExtension>();
                    if (adaptiveLah != null)
                        adaptiveLah.SetConfiguredMax(area.LookaheadTime);
                }
            }

            // 3. 轴向约束
            var axisLock = vcam.GetComponent<CameraAxisLockExtension>();
            if (axisLock != null)
            {
                axisLock.LockX = area.LockHorizontal;
                axisLock.LockY = area.LockVertical;
                if (area.ConfinerCollider != null)
                {
                    var center   = area.ConfinerCollider.bounds.center;
                    axisLock.LockedX = center.x;
                    axisLock.LockedY = center.y;
                }
            }

            // 4. 下坠视野偏置（无论是否覆写跟随行为，始终按区域配置）
            var fallBias = vcam.GetComponent<CameraFallBiasExtension>();
            if (fallBias != null)
                fallBias.SetConfiguredMax(area.DisableFallBias ? 0f : -1f);

            // 5. 方向感知水平偏置
            // X 轴已锁定时强制关闭偏置：两者均在 Body Stage 执行，若偏置后于锁定运行会破坏轴锁。
            var facingBias = vcam.GetComponent<CameraFacingBiasExtension>();
            if (facingBias != null)
            {
                if (area.LockHorizontal)
                    facingBias.FacingBias = 0f;
                else if (area.OverrideFacingBias)
                    facingBias.FacingBias = area.FacingBiasOverride;
            }

            // 6. 相机噪音（区域氛围震动：洞穴、水下、机械等）
            var noise = vcam.GetComponent<CinemachineBasicMultiChannelPerlin>();
            if (noise != null)
            {
                noise.NoiseProfile  = area.NoiseProfile;
                noise.AmplitudeGain = area.NoiseProfile != null ? area.NoiseAmplitude : 0f;
                noise.FrequencyGain = area.NoiseFrequency;
            }
        }

        private static void ResetVCamExtensions(CinemachineCamera vcam)
        {
            if (vcam == null) return;
            vcam.GetComponent<CameraAsymmetricDampingExtension>()?.ResetState();
            vcam.GetComponent<CameraFallBiasExtension>()?.ResetState();
            vcam.GetComponent<CameraAdaptiveLookaheadExtension>()?.ResetState();
            vcam.GetComponent<CameraFacingBiasExtension>()?.ResetState();
        }

        private void ApplyBlendProfile(CameraBlendProfileSO profile)
        {
            if (_brain != null && profile != null)
                _brain.DefaultBlend = profile.ToBlendDefinition();
        }

        // ── 运行时调试覆盖层 ──────────────────────────────────────────────────
#if UNITY_EDITOR || DEVELOPMENT_BUILD

        [Header("调试")]
        [Tooltip("运行时在屏幕左上角显示当前相机区域信息。\n仅在 Editor 和 Development Build 中有效。")]
        [SerializeField] private bool _showDebugOverlay = false;

        private GUIStyle _debugBoxStyle;
        private GUIStyle _debugTitleStyle;
        private GUIStyle _debugRowStyle;
        private GUIStyle _debugWarnStyle;

        private void InitDebugStyles()
        {
            if (_debugBoxStyle != null) return;

            var bg = new Texture2D(1, 1);
            bg.SetPixel(0, 0, new Color(0f, 0f, 0f, 0.72f));
            bg.Apply();

            _debugBoxStyle = new GUIStyle(GUI.skin.box)
            {
                normal    = { background = bg, textColor = Color.white },
                padding   = new RectOffset(10, 10, 8, 8),
                alignment = TextAnchor.UpperLeft,
                fontSize  = 12,
            };
            _debugTitleStyle = new GUIStyle(GUI.skin.label)
            {
                normal    = { textColor = new Color(1f, 0.85f, 0.25f) },
                fontStyle = FontStyle.Bold,
                fontSize  = 13,
            };
            _debugRowStyle = new GUIStyle(GUI.skin.label)
            {
                normal   = { textColor = new Color(0.88f, 0.88f, 0.88f) },
                fontSize = 12,
            };
            _debugWarnStyle = new GUIStyle(GUI.skin.label)
            {
                normal   = { textColor = new Color(1f, 0.45f, 0.35f) },
                fontSize = 12,
            };
        }

        private void OnGUI()
        {
            if (!Application.isPlaying || !_showDebugOverlay) return;
            InitDebugStyles();

            float x = 12f, y = 12f, w = 320f;

            // 计算高度（先收集内容）
            string areaName      = _currentArea != null ? _currentArea.name : "<无>";
            string dedicatedLabel = _activeDedicatedCam != null
                                  ? $"{_activeDedicatedCam.name} (P={_activeDedicatedCam.Priority})"
                                  : "<无激活 VCam>";
            string followLabel   = _currentFollowTarget != null
                                 ? _currentFollowTarget.name
                                 : "<未设置>";

            bool warnFollow  = _currentFollowTarget == null;
            bool warnNoVCam  = _activeDedicatedCam == null;
            bool warnNoBrain = _brain == null;

            // 区域状态（基线 + 触发区域集合）
            var zoneLines = new System.Collections.Generic.List<string>();
            string baselineName   = _roomBaselineArea != null ? _roomBaselineArea.name : "<未设置>";
            string baselineMarker = (_currentArea == _roomBaselineArea && _activeZones.Count == 0) ? " ◄ 激活" : "";
            zoneLines.Add($"  [基线] {baselineName}{baselineMarker}");
            for (int i = _activeZones.Count - 1; i >= 0; i--)
            {
                var e = _activeZones[i];
                string marker = (e.area == _currentArea) ? " ◄ 激活" : "";
                zoneLines.Add($"  [{e.priority}] {(e.area != null ? e.area.name : "null")}{marker}");
            }

            int lineCount = 4 + zoneLines.Count + (warnFollow ? 1 : 0) + (warnNoVCam ? 1 : 0) + (warnNoBrain ? 1 : 0);
            float rowH = 19f;
            float h    = 28f + lineCount * rowH + 8f;

            GUI.Box(new Rect(x, y, w, h), GUIContent.none, _debugBoxStyle);
            float cy = y + 8f;

            GUI.Label(new Rect(x + 8f, cy, w - 16f, 22f), "[ Camera State Controller ]", _debugTitleStyle);
            cy += 22f;

            GUI.Label(new Rect(x + 8f, cy, w - 16f, rowH), $"当前区域：{areaName}", _debugRowStyle);  cy += rowH;
            GUI.Label(new Rect(x + 8f, cy, w - 16f, rowH), $"专有 VCam：{dedicatedLabel}", warnNoVCam ? _debugWarnStyle : _debugRowStyle); cy += rowH;
            GUI.Label(new Rect(x + 8f, cy, w - 16f, rowH), $"Follow 目标：{followLabel}", warnFollow ? _debugWarnStyle : _debugRowStyle); cy += rowH;

            GUI.Label(new Rect(x + 8f, cy, w - 16f, rowH), "区域状态（基线 + 触发区域）：", _debugRowStyle); cy += rowH;
            foreach (var line in zoneLines)
            {
                GUI.Label(new Rect(x + 8f, cy, w - 16f, rowH), line, _debugRowStyle);
                cy += rowH;
            }

            if (warnFollow)
            { GUI.Label(new Rect(x + 8f, cy, w - 16f, rowH), "⚠ Follow 目标未设置（检查 _onPlayerSpawned）", _debugWarnStyle); cy += rowH; }
            if (warnNoVCam)
            { GUI.Label(new Rect(x + 8f, cy, w - 16f, rowH), "⚠ 当前区域无激活专有 VCam（检查 DedicatedCamera 绑定）", _debugWarnStyle); cy += rowH; }
            if (warnNoBrain)
            { GUI.Label(new Rect(x + 8f, cy, w - 16f, rowH), "⚠ CinemachineBrain 未绑定", _debugWarnStyle); cy += rowH; }
        }

#endif
    }
}