using System.Collections;
using System.Collections.Generic;

using Colosseum.AI;
using Colosseum.Abnormalities;
using Colosseum.Combat;
using Colosseum.Player;
using Colosseum.Skills;

using Unity.Behavior;
using Unity.Netcode;
using UnityEngine;
using UnityEngine.Serialization;

namespace Colosseum.Enemy
{
    /// <summary>
    /// 보스 공통 전투 BT가 참조하는 전투 컨텍스트입니다.
    /// 패턴 슬롯, 거리 기준, 페이즈별 주기, 공통 타겟 판정 정보를 제공합니다.
    /// </summary>
    [DisallowMultipleComponent]
    [RequireComponent(typeof(BossEnemy))]
    [RequireComponent(typeof(SkillController))]
    public abstract class BossCombatBehaviorContext : NetworkBehaviour
    {
        [Header("References")]
        [SerializeField] protected BossEnemy bossEnemy;
        [SerializeField] protected EnemyBase enemyBase;
        [SerializeField] protected SkillController skillController;
        [SerializeField] protected AbnormalityManager abnormalityManager;
        [SerializeField] protected UnityEngine.AI.NavMeshAgent navMeshAgent;
        [SerializeField] protected BehaviorGraphAgent behaviorGraphAgent;

        [Header("Pattern Data")]
        [Tooltip("기본 근접 압박 패턴")]
        [FormerlySerializedAs("mainPattern")]
        [SerializeField] protected BossPatternData primaryPattern;

        [Tooltip("기동 또는 거리 징벌 패턴")]
        [FormerlySerializedAs("leapPattern")]
        [SerializeField] protected BossPatternData mobilityPattern;

        [Tooltip("비주 대상 원거리 견제 패턴")]
        [SerializeField] protected BossPatternData utilityPattern;

        [Tooltip("Phase 3 조합 패턴")]
        [SerializeField] protected BossPatternData comboPattern;

        [Tooltip("특정 상황에서 우선 발동하는 징벌 패턴")]
        [FormerlySerializedAs("downPunishPattern")]
        [SerializeField] protected BossPatternData punishPattern;

        [Tooltip("파티 누킹을 시험하는 시그니처 패턴")]
        [SerializeField] protected BossPatternData signaturePattern;

        [Header("Phase Thresholds")]
        [Tooltip("2페이즈 진입 체력 비율")]
        [Range(0f, 1f)] [SerializeField] protected float phase2HealthThreshold = 0.75f;

        [Tooltip("3페이즈 진입 체력 비율")]
        [Range(0f, 1f)] [SerializeField] protected float phase3HealthThreshold = 0.4f;

        [Header("Targeting")]
        [Tooltip("타겟 재탐색 주기")]
        [FormerlySerializedAs("targetRefreshInterval")]
        [Min(0.05f)] [SerializeField] protected float primaryTargetRefreshInterval = 0.2f;

        [Tooltip("기동 패턴을 고려하기 시작하는 거리")]
        [FormerlySerializedAs("leapDistanceThreshold")]
        [Min(0f)] [SerializeField] protected float mobilityTriggerDistance = 8f;

        [Tooltip("징벌 패턴을 고려할 최대 반경")]
        [FormerlySerializedAs("downPunishSearchRadius")]
        [Min(0f)] [SerializeField] protected float punishSearchRadius = 6f;

        [Tooltip("원거리 견제 패턴을 고려하기 시작하는 최소 거리")]
        [Min(0f)] [SerializeField] protected float utilityTriggerDistance = 5f;

        [Header("Pattern Flow")]
        [Tooltip("대형 패턴(시그니처/기동/조합) 직후 기본 패턴 최소 순환 횟수")]
        [Min(0)] [SerializeField] protected int basicLoopMinCountAfterBigPattern = 2;

        [Header("Signature Pattern")]
        [Tooltip("시그니처 패턴 차단에 필요한 누적 피해 비율")]
        [Range(0f, 1f)] [SerializeField] protected float signatureRequiredDamageRatio = 0.1f;

        [Tooltip("시그니처 준비 상태를 나타내는 이상상태")]
        [SerializeField] protected AbnormalityData signatureTelegraphAbnormality;

        [Tooltip("시그니처 차단 성공 시 보스가 멈추는 시간")]
        [Min(0f)] [SerializeField] protected float signatureSuccessStaggerDuration = 2f;

        [Tooltip("시그니처 실패 시 모든 플레이어에게 적용할 디버프")]
        [SerializeField] protected AbnormalityData signatureFailureAbnormality;

        [Tooltip("시그니처 실패 시 모든 플레이어에게 주는 기본 피해")]
        [Min(0f)] [SerializeField] protected float signatureFailureDamage = 40f;

        [Tooltip("시그니처 실패 시 넉백이 적용되는 반경")]
        [Min(0f)] [SerializeField] protected float signatureFailureKnockbackRadius = 8f;

        [Tooltip("시그니처 실패 시 다운이 적용되는 반경")]
        [Min(0f)] [SerializeField] protected float signatureFailureDownRadius = 3f;

        [Tooltip("시그니처 실패 시 넉백 속도")]
        [Min(0f)] [SerializeField] protected float signatureFailureKnockbackSpeed = 12f;

        [Tooltip("시그니처 실패 시 넉백 지속 시간")]
        [Min(0f)] [SerializeField] protected float signatureFailureKnockbackDuration = 0.35f;

        [Tooltip("시그니처 실패 시 다운 지속 시간")]
        [Min(0f)] [SerializeField] protected float signatureFailureDownDuration = 2f;

        [Header("Behavior")]
[Tooltip("true면 컨텍스트 코드가 AI를 직접 구동합니다. false면 BehaviorGraph가 모든 의사결정을 담당합니다.")]
[SerializeField] protected bool disableBehaviorGraph = false;

        [Tooltip("디버그 로그 출력 여부")]
        [SerializeField] protected bool debugMode = false;

        protected readonly Dictionary<BossPatternData, float> patternCooldownTracker = new Dictionary<BossPatternData, float>();

        protected Coroutine activePatternCoroutine;
        protected GameObject currentTarget;
        protected float nextTargetRefreshTime;
        protected int meleePatternCounter;
        protected bool isSignaturePatternActive;
        protected bool isPreviewingSignatureTelegraph;
        protected float signatureAccumulatedDamage;
        protected float signatureRequiredDamage;
        protected float signatureElapsedTime;
        protected float signatureTotalDuration;
        protected int basicLoopCountSinceLastBigPattern;

        /// <summary>
        /// 전용 컨텍스트 사용 시 BehaviorGraph를 비활성화할지 여부
        /// </summary>
        public bool DisableBehaviorGraph => disableBehaviorGraph;

        /// <summary>
        /// 기동 패턴을 고려하는 최소 거리
        /// </summary>
        public float MobilityTriggerDistance => mobilityTriggerDistance;

        /// <summary>
        /// 원거리 견제 패턴을 고려하는 최소 거리
        /// </summary>
        public float UtilityTriggerDistance => utilityTriggerDistance;

        /// <summary>
        /// 징벌 패턴을 고려하는 최대 반경
        /// </summary>
        public float PunishSearchRadius => punishSearchRadius;

        /// <summary>
        /// 현재 전투 대상
        /// </summary>
        public GameObject CurrentTarget => currentTarget;

        /// <summary>
        /// EnemyBase 접근자
        /// </summary>
        public EnemyBase EnemyBase => enemyBase;

        /// <summary>
        /// 현재 전투 기준이 되는 주 대상을 반환합니다.
        /// </summary>
        public GameObject ResolvePrimaryTarget()
        {
            if (IsValidHostileTarget(currentTarget))
                return currentTarget;

            GameObject highestThreatTarget = enemyBase != null
                ? enemyBase.GetHighestThreatTarget(currentTarget, null, enemyBase.Data != null ? enemyBase.Data.AggroRange : Mathf.Infinity)
                : null;

            return highestThreatTarget != null ? highestThreatTarget : FindNearestLivingTarget();
        }

        /// <summary>
        /// 시그니처 패턴 진행 여부
        /// </summary>
        public bool IsSignaturePatternActive => isSignaturePatternActive;
        public string SignaturePatternName => isSignaturePatternActive && signaturePattern != null ? signaturePattern.PatternName : string.Empty;
        public float SignatureAccumulatedDamage => signatureAccumulatedDamage;
        public float SignatureRequiredDamage => signatureRequiredDamage;
        public float SignatureBreakProgressNormalized => signatureRequiredDamage > 0f ? Mathf.Clamp01(signatureAccumulatedDamage / signatureRequiredDamage) : 0f;
        public float SignatureElapsedTime => signatureElapsedTime;
        public float SignatureTotalDuration => signatureTotalDuration;
        public float SignatureCastProgressNormalized => signatureTotalDuration > 0f ? Mathf.Clamp01(signatureElapsedTime / signatureTotalDuration) : 0f;
        public float SignatureRemainingTime => Mathf.Max(0f, signatureTotalDuration - signatureElapsedTime);

        /// <summary>
        /// 디버그 로그 출력 여부
        /// </summary>
        public bool DebugModeEnabled => debugMode;

        /// <summary>
        /// 기절 등으로 인해 보스 전투 로직을 진행할 수 없는 상태인지 여부
        /// </summary>
        public bool IsBehaviorSuppressed => isPreviewingSignatureTelegraph || (abnormalityManager != null && abnormalityManager.IsStunned);

        /// <summary>
        /// 현재 보스 패턴 페이즈
        /// </summary>
        public int CurrentPatternPhase
        {
            get
            {
                float healthRatio = bossEnemy != null && bossEnemy.MaxHealth > 0f
                    ? bossEnemy.CurrentHealth / bossEnemy.MaxHealth
                    : 1f;

                if (healthRatio <= phase3HealthThreshold)
                    return 3;

                if (healthRatio <= phase2HealthThreshold)
                    return 2;

                return 1;
            }
        }

        protected virtual void Awake()
        {
            ResolveReferences();
        }

        public override void OnNetworkSpawn()
        {
            ResolveReferences();

            if (!IsServer)
                enabled = false;
        }

        protected virtual void Update()
        {
            if (!IsServer)
                return;

            ResolveReferences();
            if (bossEnemy == null || enemyBase == null || skillController == null)
                return;

            if (bossEnemy.IsDead || bossEnemy.IsTransitioning)
                return;

            if (IsBehaviorSuppressed)
            {
                StopMovement();
                return;
            }

            if (!disableBehaviorGraph)
                return;

            RefreshTargetIfNeeded();
            UpdateMovement();

            if (skillController.IsPlayingAnimation)
                return;

            // 1. 다운 추가타 (최우선 인터럽트, grace period 면제)
            if (TryStartPunishPattern())
                return;

            // 2. 집행 개시 (Phase 3 시그니처)
            if (TryStartSignaturePatternInLoop())
                return;

            // 3. 조합 패턴 (Phase 3, 드물게)
            if (TryStartComboPattern())
                return;

            // 4. 기동 패턴 (거리 기반 조건부)
            if (TryStartMobilityPattern())
                return;

            // 5. 원거리 견제 (보조)
            if (TryStartUtilityPattern())
                return;

            // 6. 기본 루프
            TryStartPrimaryLoopPattern();
        }



        /// <summary>
        /// 근접 패턴 사용 카운터를 갱신합니다.
        /// </summary>
        public void RegisterPatternUse(BossPatternData pattern)
        {
            if (pattern == null)
                return;

            if (pattern.IsMelee)
            {
                meleePatternCounter++;
                basicLoopCountSinceLastBigPattern++;
            }

            if (pattern.Category == PatternCategory.Punish || pattern.IsBigPattern)
            {
                basicLoopCountSinceLastBigPattern = 0;
            }
        }

        /// <summary>
        /// 살아 있는 적대 대상인지 확인합니다.
        /// </summary>
        public bool IsValidHostileTarget(GameObject candidate)
        {
            if (candidate == null || !candidate.activeInHierarchy)
                return false;

            if (Team.IsSameTeam(gameObject, candidate))
                return false;

            IDamageable damageable = candidate.GetComponent<IDamageable>();
            return damageable == null || !damageable.IsDead;
        }

        /// <summary>
        /// 기동 패턴 대상으로 유효한지 확인합니다.
        /// </summary>
        public bool IsValidMobilityTarget(GameObject candidate)
        {
            if (!IsValidHostileTarget(candidate))
                return false;

            float maxDistance = enemyBase != null && enemyBase.Data != null ? enemyBase.Data.AggroRange : 20f;
            float distance = Vector3.Distance(transform.position, candidate.transform.position);
            return distance >= mobilityTriggerDistance && distance <= maxDistance;
        }

        /// <summary>
        /// 기동 패턴 대상으로 사용할 수 있는 가장 먼 유효 타겟을 찾습니다.
        /// </summary>
        public GameObject FindMobilityTarget()
        {
            GameObject[] candidates = GameObject.FindGameObjectsWithTag("Player");
            GameObject farthestTarget = null;
            float bestDistance = mobilityTriggerDistance;
            float maxDistance = enemyBase != null && enemyBase.Data != null ? enemyBase.Data.AggroRange : 20f;

            for (int i = 0; i < candidates.Length; i++)
            {
                GameObject candidate = candidates[i];
                if (!IsValidMobilityTarget(candidate))
                    continue;

                float distance = Vector3.Distance(transform.position, candidate.transform.position);
                if (distance > maxDistance || distance <= bestDistance)
                    continue;

                bestDistance = distance;
                farthestTarget = candidate;
            }

            return farthestTarget;
        }

        /// <summary>
        /// 원거리 견제 패턴 대상으로 유효한지 확인합니다.
        /// </summary>
        public bool IsValidUtilityTarget(GameObject candidate)
        {
            if (!IsValidHostileTarget(candidate))
                return false;

            if (candidate == ResolvePrimaryTarget())
                return false;

            float maxDistance = enemyBase != null && enemyBase.Data != null ? enemyBase.Data.AggroRange : 20f;
            float distance = Vector3.Distance(transform.position, candidate.transform.position);
            return distance >= utilityTriggerDistance && distance <= maxDistance;
        }

        /// <summary>
        /// 현재 주 대상이 아닌 원거리 견제 대상을 찾습니다.
        /// </summary>
        public GameObject FindUtilityTarget()
        {
            PlayerNetworkController[] players = FindObjectsByType<PlayerNetworkController>(FindObjectsSortMode.None);
            List<GameObject> validTargets = new List<GameObject>();
            GameObject primaryTarget = ResolvePrimaryTarget();

            for (int i = 0; i < players.Length; i++)
            {
                PlayerNetworkController player = players[i];
                if (player == null || player.IsDead || !player.gameObject.activeInHierarchy)
                    continue;

                GameObject candidate = player.gameObject;
                if (!IsValidUtilityTarget(candidate))
                    continue;

                validTargets.Add(candidate);
            }

            if (validTargets.Count == 0)
            {
                if (IsValidHostileTarget(primaryTarget))
                {
                    float maxDistance = enemyBase != null && enemyBase.Data != null ? enemyBase.Data.AggroRange : 20f;
                    float distance = Vector3.Distance(transform.position, primaryTarget.transform.position);
                    if (distance >= utilityTriggerDistance && distance <= maxDistance)
                        return primaryTarget;
                }

                return null;
            }

            int randomIndex = UnityEngine.Random.Range(0, validTargets.Count);
            return validTargets[randomIndex];
        }

        /// <summary>
        /// 가장 가까운 생존 플레이어를 찾습니다.
        /// </summary>
        public GameObject FindNearestLivingTarget()
        {
            PlayerNetworkController[] players = FindObjectsByType<PlayerNetworkController>(FindObjectsSortMode.None);

            GameObject nearestTarget = null;
            float nearestDistance = float.MaxValue;
            float aggroRange = enemyBase != null && enemyBase.Data != null ? enemyBase.Data.AggroRange : Mathf.Infinity;

            for (int i = 0; i < players.Length; i++)
            {
                PlayerNetworkController player = players[i];
                if (player == null || player.IsDead || !player.gameObject.activeInHierarchy)
                    continue;

                GameObject candidate = player.gameObject;
                if (!IsValidHostileTarget(candidate))
                    continue;

                float distance = Vector3.Distance(transform.position, candidate.transform.position);
                if (distance > aggroRange || distance >= nearestDistance)
                    continue;

                nearestDistance = distance;
                nearestTarget = candidate;
            }

            return nearestTarget;
        }

        /// <summary>
        /// 로그를 출력합니다.
        /// </summary>
        public void LogDebug(string source, string message)
        {
            if (debugMode)
                Debug.Log($"[{source}] {message}");
        }

        /// <summary>
        /// 시그니처 패턴 사용 가능 여부를 반환합니다.
        /// </summary>
        public bool IsSignaturePatternReady()
        {
            if (!IsServer || bossEnemy == null || skillController == null)
                return false;

            if (IsBehaviorSuppressed)
                return false;

            if (activePatternCoroutine != null || isSignaturePatternActive)
                return false;

            if (bossEnemy.IsDead || bossEnemy.IsTransitioning || skillController.IsPlayingAnimation)
                return false;

            if (!IsPatternGracePeriodAllowed(signaturePattern))
                return false;

            return IsPatternReady(signaturePattern);
        }

        /// <summary>
        /// 지정 패턴이 grace period를 통과했는지 반환합니다.
        /// Punish/Melee/Utility는 항상 허용됩니다.
        /// </summary>
        public bool IsPatternGracePeriodAllowed(BossPatternData pattern)
        {
            if (pattern == null)
                return false;

            if (pattern.Category == PatternCategory.Punish)
                return true;

            if (pattern.IsMelee || pattern.TargetMode == TargetResolveMode.Utility)
                return true;

            return basicLoopCountSinceLastBigPattern >= basicLoopMinCountAfterBigPattern;
        }

        /// <summary>
        /// 조합 패턴 사용 가능 여부를 반환합니다.
        /// </summary>
        public bool IsComboPatternReady()
        {
            if (!IsServer || bossEnemy == null || skillController == null)
                return false;

            if (IsBehaviorSuppressed)
                return false;

            if (activePatternCoroutine != null || isSignaturePatternActive)
                return false;

            if (bossEnemy.IsDead || bossEnemy.IsTransitioning || skillController.IsPlayingAnimation)
                return false;

            if (!IsPatternGracePeriodAllowed(comboPattern))
                return false;

            return IsPatternReady(comboPattern);
        }

        /// <summary>
        /// 시그니처 패턴을 시작합니다.
        /// </summary>
        public bool TryStartSignaturePattern(GameObject target)
        {
            if (!IsSignaturePatternReady())
                return false;

            GameObject resolvedTarget = IsValidHostileTarget(target) ? target : FindNearestLivingTarget();
            currentTarget = resolvedTarget;
            activePatternCoroutine = StartCoroutine(RunSignaturePatternCoroutine(signaturePattern, resolvedTarget));
            return true;
        }

        /// <summary>
        /// 디버그 또는 특수 연출에서 시그니처 패턴을 강제로 시작합니다.
        /// </summary>
        public bool ForceStartSignaturePattern(GameObject target = null)
        {
            if (!IsServer || signaturePattern == null || activePatternCoroutine != null || isSignaturePatternActive)
                return false;

            GameObject resolvedTarget = IsValidHostileTarget(target) ? target : ResolvePrimaryTarget();
            activePatternCoroutine = StartCoroutine(RunSignaturePatternCoroutine(signaturePattern, resolvedTarget));
            return true;
        }

        /// <summary>
        /// 네트워크 상태와 무관하게 시그니처 전조 모션만 미리보기로 재생합니다.
        /// 전조 연출 확인용 디버그 경로입니다.
        /// </summary>
        public bool PreviewSignatureTelegraph()
        {
            if (signaturePattern == null || skillController == null)
                return false;

            if (activePatternCoroutine != null || isSignaturePatternActive || isPreviewingSignatureTelegraph)
                return false;

            StartCoroutine(PreviewSignatureTelegraphCoroutine());
            return true;
        }

        protected virtual bool TryStartPrimaryLoopPattern()
        {
            if (currentTarget == null)
                return false;

            float distanceToTarget = Vector3.Distance(transform.position, currentTarget.transform.position);
            float attackRange = enemyBase != null && enemyBase.Data != null ? enemyBase.Data.AttackRange : 2f;
            if (distanceToTarget > attackRange + 0.25f)
                return false;

            BossPatternData selectedPattern = SelectPrimaryLoopPattern();
            if (selectedPattern == null)
                return false;

            StartPattern(selectedPattern, currentTarget);
            return true;
        }

        protected virtual bool TryStartMobilityPattern()
        {
            BossPatternData pattern = mobilityPattern;
            if (!IsPatternReady(pattern))
                return false;

            GameObject target = FindMobilityTarget();
            if (target == null)
                return false;

            currentTarget = target;
            StartPattern(pattern, target);
            return true;
        }

        protected virtual bool TryStartUtilityPattern()
        {
            BossPatternData pattern = utilityPattern;
            if (!IsPatternReady(pattern))
                return false;

            GameObject target = FindUtilityTarget();
            if (target == null)
                return false;

            currentTarget = target;
            StartPattern(pattern, target);
            return true;
        }

        /// <summary>
        /// 다운 대상이 존재하면 징벌 패턴을 발동합니다.
        /// </summary>
        protected virtual bool TryStartPunishPattern()
        {
            BossPatternData pattern = punishPattern;
            if (!IsPatternReady(pattern))
                return false;

            HitReactionController[] hitReactionControllers = FindObjectsByType<HitReactionController>(FindObjectsSortMode.None);
            GameObject nearestDownedTarget = null;
            float nearestDistance = float.MaxValue;

            for (int i = 0; i < hitReactionControllers.Length; i++)
            {
                HitReactionController controller = hitReactionControllers[i];
                if (controller == null || !controller.IsDowned)
                    continue;

                GameObject candidate = controller.gameObject;
                if (candidate == null || !candidate.activeInHierarchy)
                    continue;

                if (Team.IsSameTeam(gameObject, candidate))
                    continue;

                IDamageable damageable = candidate.GetComponent<IDamageable>();
                if (damageable != null && damageable.IsDead)
                    continue;

                float distance = Vector3.Distance(transform.position, candidate.transform.position);
                if (distance > punishSearchRadius || distance >= nearestDistance)
                    continue;

                nearestDistance = distance;
                nearestDownedTarget = candidate;
            }

            if (nearestDownedTarget == null)
                return false;

            currentTarget = nearestDownedTarget;
            StartPattern(pattern, nearestDownedTarget);
            return true;
        }

        /// <summary>
        /// 시그니처 패턴을 context 루프에서 발동합니다.
        /// grace period와 Phase 제한을 적용합니다.
        /// </summary>
        protected virtual bool TryStartSignaturePatternInLoop()
        {
            if (!IsSignaturePatternReady())
                return false;

            if (!IsPatternGracePeriodAllowed(signaturePattern))
                return false;

            GameObject target = ResolvePrimaryTarget();
            return TryStartSignaturePattern(target);
        }

        /// <summary>
        /// Phase 3 조합 패턴을 발동합니다.
        /// </summary>
        protected virtual bool TryStartComboPattern()
        {
            if (!IsComboPatternReady())
                return false;

            currentTarget = ResolvePrimaryTarget();
            StartPattern(comboPattern, currentTarget);
            return true;
        }

        protected virtual BossPatternData SelectPrimaryLoopPattern()
        {
            if (!IsPatternReady(primaryPattern))
                return null;

            meleePatternCounter++;
            return primaryPattern;
        }

        /// <summary>
        /// 기본 패턴을 선택하고 카운터를 갱신합니다.
        /// </summary>
        public BossPatternData SelectAndRegisterBasicLoopPattern()
        {
            if (!IsPatternReady(primaryPattern))
                return null;

            RegisterPatternUse(primaryPattern);
            return primaryPattern;
        }

        /// <summary>
        /// 기본 패턴이 사용 가능한지 확인합니다.
        /// 상태 변경 없이 순수 검사만 수행합니다.
        /// </summary>
        public bool IsBasicLoopReady()
        {
            return IsPatternReady(primaryPattern);
        }

        protected virtual void StartPattern(BossPatternData pattern, GameObject target)
        {
            if (pattern == null || activePatternCoroutine != null)
                return;

            currentTarget = target;
            LogDebug(GetType().Name, $"패턴 시작: {pattern.PatternName} / Target={(target != null ? target.name : "None")} / Phase={CurrentPatternPhase}");
            CombatBalanceTracker.RecordBossPattern(pattern.PatternName);
            activePatternCoroutine = StartCoroutine(RunPatternCoroutine(pattern, target));
        }

        protected virtual IEnumerator RunPatternCoroutine(BossPatternData pattern, GameObject target)
        {
            StopMovement();
            bool completed = true;

            for (int i = 0; i < pattern.Steps.Count; i++)
            {
                PatternStep step = pattern.Steps[i];
                if (step.Type == PatternStepType.Wait)
                {
                    yield return new WaitForSeconds(step.Duration);
                    continue;
                }

                if (step.Skill == null)
                {
                    completed = false;
                    Debug.LogWarning($"[{GetType().Name}] 패턴 스텝 스킬이 비어 있습니다. Pattern={pattern.PatternName}, Index={i}");
                    break;
                }

                if (step.Skill.JumpToTarget)
                {
                    GameObject jumpTarget = FindMobilityTarget();
                    if (jumpTarget == null)
                    {
                        LogDebug(GetType().Name, $"점프 대상 없음, 패턴 조기 종료: {pattern.PatternName}");
                        break;
                    }

                    target = jumpTarget;
                    currentTarget = jumpTarget;
                    enemyBase?.SetJumpTarget(jumpTarget.transform.position);
                }

                if (!skillController.ExecuteSkill(step.Skill))
                {
                    completed = false;
                    LogDebug(GetType().Name, $"스킬 실행 실패: {step.Skill.SkillName}");
                    break;
                }

                yield return new WaitUntil(() => skillController == null || !skillController.IsPlayingAnimation || bossEnemy == null || bossEnemy.IsDead);
                if (bossEnemy == null || bossEnemy.IsDead)
                    break;
            }

            if (completed)
            {
                patternCooldownTracker[pattern] = Time.time + pattern.Cooldown;
            }

            activePatternCoroutine = null;
            currentTarget = target;
        }

        protected bool IsPatternReady(BossPatternData pattern)
        {
            if (pattern == null || pattern.Steps == null || pattern.Steps.Count == 0)
                return false;

            if (!patternCooldownTracker.TryGetValue(pattern, out float readyTime))
                return true;

            return Time.time >= readyTime;
        }

        protected virtual void RefreshTargetIfNeeded()
        {
            if (Time.time < nextTargetRefreshTime)
                return;

            nextTargetRefreshTime = Time.time + primaryTargetRefreshInterval;
            GameObject highestThreatTarget = enemyBase.GetHighestThreatTarget(currentTarget, null, enemyBase.Data != null ? enemyBase.Data.AggroRange : Mathf.Infinity);
            currentTarget = highestThreatTarget != null ? highestThreatTarget : FindNearestLivingTarget();
        }

        protected virtual void UpdateMovement()
        {
            if (navMeshAgent == null || !navMeshAgent.enabled)
                return;

            if (skillController != null && skillController.IsPlayingAnimation)
            {
                StopMovement();
                return;
            }

            if (currentTarget == null)
            {
                StopMovement();
                return;
            }

            float attackRange = enemyBase != null && enemyBase.Data != null ? enemyBase.Data.AttackRange : 2f;
            float distanceToTarget = Vector3.Distance(transform.position, currentTarget.transform.position);
            if (distanceToTarget <= attackRange)
            {
                StopMovement();
                return;
            }

            navMeshAgent.isStopped = false;
            navMeshAgent.stoppingDistance = attackRange;
            navMeshAgent.SetDestination(currentTarget.transform.position);
        }

        protected void StopMovement()
        {
            if (navMeshAgent == null || !navMeshAgent.enabled)
                return;

            navMeshAgent.isStopped = true;
            navMeshAgent.ResetPath();
        }

        protected virtual void ResolveReferences()
        {
            if (bossEnemy == null)
                bossEnemy = GetComponent<BossEnemy>();

            if (enemyBase == null)
                enemyBase = GetComponent<EnemyBase>();

            if (skillController == null)
                skillController = GetComponent<SkillController>();

            if (abnormalityManager == null)
                abnormalityManager = GetComponent<AbnormalityManager>();

            if (navMeshAgent == null)
                navMeshAgent = GetComponent<UnityEngine.AI.NavMeshAgent>();

            if (behaviorGraphAgent == null)
                behaviorGraphAgent = GetComponent<BehaviorGraphAgent>();

            if (enemyBase != null)
            {
                enemyBase.OnDamageTaken -= HandleBossDamageTaken;
                enemyBase.OnDamageTaken += HandleBossDamageTaken;
            }
        }

        public override void OnNetworkDespawn()
        {
            if (enemyBase != null)
            {
                enemyBase.OnDamageTaken -= HandleBossDamageTaken;
            }

            base.OnNetworkDespawn();
        }

        private IEnumerator RunSignaturePatternCoroutine(BossPatternData pattern, GameObject target)
        {
            StopMovement();

            isSignaturePatternActive = true;
            signatureAccumulatedDamage = 0f;
            signatureRequiredDamage = bossEnemy.MaxHealth * signatureRequiredDamageRatio;
            signatureElapsedTime = 0f;
            signatureTotalDuration = CalculatePatternDuration(pattern);

            bool interrupted = false;
            bool completed = true;

            for (int i = 0; i < pattern.Steps.Count; i++)
            {
                if (HasMetSignatureBreakThreshold())
                {
                    interrupted = true;
                    break;
                }

                PatternStep step = pattern.Steps[i];
                if (step.Type == PatternStepType.Wait)
                {
                    float remaining = step.Duration;
                    while (remaining > 0f)
                    {
                        if (HasMetSignatureBreakThreshold())
                        {
                            interrupted = true;
                            break;
                        }

                        if (bossEnemy == null || bossEnemy.IsDead)
                        {
                            completed = false;
                            break;
                        }

                        signatureElapsedTime += Time.deltaTime;
                        remaining -= Time.deltaTime;
                        yield return null;
                    }

                    if (interrupted || !completed)
                        break;

                    continue;
                }

                if (step.Skill == null)
                {
                    completed = false;
                    Debug.LogWarning($"[{GetType().Name}] 시그니처 패턴 스텝 스킬이 비어 있습니다. Pattern={pattern.PatternName}, Index={i}");
                    break;
                }

                if (!skillController.ExecuteSkill(step.Skill))
                {
                    completed = false;
                    LogDebug(GetType().Name, $"시그니처 스킬 실행 실패: {step.Skill.SkillName}");
                    break;
                }

                while (skillController != null && skillController.IsPlayingAnimation)
                {
                    if (HasMetSignatureBreakThreshold())
                    {
                        interrupted = true;
                        break;
                    }

                    if (bossEnemy == null || bossEnemy.IsDead)
                    {
                        completed = false;
                        break;
                    }

                    signatureElapsedTime += Time.deltaTime;
                    yield return null;
                }

                if (interrupted || !completed)
                    break;
            }

            if (interrupted)
            {
                skillController?.CancelSkill(SkillCancelReason.Interrupt);
                UsePatternAction.MarkPatternUsed(gameObject, pattern);
                LogDebug(GetType().Name, $"시그니처 차단 성공: 누적 피해 {signatureAccumulatedDamage:F1} / 필요 {signatureRequiredDamage:F1}");
                CombatBalanceTracker.RecordBossEvent("집행 개시 차단 성공");

                if (signatureSuccessStaggerDuration > 0f)
                {
                    if (enemyBase != null && enemyBase.Animator != null &&
                        HasAnimatorParameter(enemyBase.Animator, "Hit", AnimatorControllerParameterType.Trigger))
                    {
                        enemyBase.Animator.SetTrigger("Hit");
                    }

                    float endTime = Time.time + signatureSuccessStaggerDuration;
                    while (Time.time < endTime && bossEnemy != null && !bossEnemy.IsDead)
                    {
                        StopMovement();
                        yield return null;
                    }
                }
            }
            else if (completed)
            {
                UsePatternAction.MarkPatternUsed(gameObject, pattern);
                LogDebug(GetType().Name, $"시그니처 실패: 누적 피해 {signatureAccumulatedDamage:F1} / 필요 {signatureRequiredDamage:F1}");
                CombatBalanceTracker.RecordBossEvent("집행 개시 실패");
                ExecuteSignatureFailure();
            }

            if (abnormalityManager != null && signatureTelegraphAbnormality != null)
            {
                abnormalityManager.RemoveAbnormality(signatureTelegraphAbnormality);
            }

            isSignaturePatternActive = false;
            signatureAccumulatedDamage = 0f;
            signatureRequiredDamage = 0f;
            signatureElapsedTime = 0f;
            signatureTotalDuration = 0f;
            activePatternCoroutine = null;
        }

        private IEnumerator PreviewSignatureTelegraphCoroutine()
        {
            bool restoreBehaviorGraph = behaviorGraphAgent != null && behaviorGraphAgent.enabled;
            isPreviewingSignatureTelegraph = true;

            if (restoreBehaviorGraph)
            {
                behaviorGraphAgent.enabled = false;
            }

            StopMovement();

            if (skillController != null && skillController.IsPlayingAnimation)
            {
                skillController.CancelSkill(SkillCancelReason.Interrupt);
                yield return null;
            }

            bool executed = false;
            for (int i = 0; i < signaturePattern.Steps.Count; i++)
            {
                PatternStep step = signaturePattern.Steps[i];
                if (step == null || step.Type != PatternStepType.Skill || step.Skill == null)
                    continue;

                executed = skillController.ExecuteSkill(step.Skill);
                break;
            }

            if (executed)
            {
                while (skillController != null && skillController.IsPlayingAnimation)
                {
                    yield return null;
                }
            }

            if (abnormalityManager != null && signatureTelegraphAbnormality != null)
            {
                abnormalityManager.RemoveAbnormality(signatureTelegraphAbnormality);
            }

            if (restoreBehaviorGraph && behaviorGraphAgent != null)
            {
                behaviorGraphAgent.enabled = true;
            }

            isPreviewingSignatureTelegraph = false;
        }

        private static float CalculatePatternDuration(BossPatternData pattern)
        {
            if (pattern == null || pattern.Steps == null)
                return 0f;

            float totalDuration = 0f;
            for (int i = 0; i < pattern.Steps.Count; i++)
            {
                PatternStep step = pattern.Steps[i];
                if (step == null)
                    continue;

                if (step.Type == PatternStepType.Wait)
                {
                    totalDuration += Mathf.Max(0f, step.Duration);
                    continue;
                }

                if (step.Skill == null)
                    continue;

                AnimationClip skillClip = step.Skill.SkillClip;
                if (skillClip != null)
                {
                    float animationSpeed = Mathf.Max(0.01f, step.Skill.AnimationSpeed);
                    totalDuration += skillClip.length / animationSpeed;
                }

                if (step.Skill.EndClip != null)
                {
                    totalDuration += step.Skill.EndClip.length;
                }
            }

            return totalDuration;
        }

        private void ExecuteSignatureFailure()
        {
            PlayerNetworkController[] players = FindObjectsByType<PlayerNetworkController>(FindObjectsSortMode.None);
            for (int i = 0; i < players.Length; i++)
            {
                PlayerNetworkController player = players[i];
                if (player == null || player.IsDead || !player.gameObject.activeInHierarchy)
                    continue;

                GameObject target = player.gameObject;
                if (!IsValidHostileTarget(target))
                    continue;

                player.TakeDamage(signatureFailureDamage, gameObject);

                AbnormalityManager abnormalityManager = target.GetComponent<AbnormalityManager>();
                if (abnormalityManager != null && signatureFailureAbnormality != null)
                {
                    abnormalityManager.ApplyAbnormality(signatureFailureAbnormality, gameObject);
                }

                HitReactionController hitReactionController = target.GetComponent<HitReactionController>();
                if (hitReactionController == null)
                    continue;

                float distance = Vector3.Distance(transform.position, target.transform.position);
                if (distance <= signatureFailureDownRadius)
                {
                    hitReactionController.ApplyDown(signatureFailureDownDuration);
                    continue;
                }

                if (distance > signatureFailureKnockbackRadius)
                    continue;

                Vector3 knockbackDirection = target.transform.position - transform.position;
                knockbackDirection.y = 0f;
                if (knockbackDirection.sqrMagnitude < 0.0001f)
                {
                    knockbackDirection = transform.forward;
                }

                hitReactionController.ApplyKnockback(knockbackDirection.normalized * signatureFailureKnockbackSpeed, signatureFailureKnockbackDuration);
            }
        }

        private bool HasMetSignatureBreakThreshold()
        {
            if (!isSignaturePatternActive)
                return false;

            if (signatureRequiredDamage <= 0f)
                return true;

            return signatureAccumulatedDamage >= signatureRequiredDamage;
        }

        private static bool HasAnimatorParameter(Animator animator, string parameterName, AnimatorControllerParameterType parameterType)
        {
            if (animator == null || string.IsNullOrEmpty(parameterName))
                return false;

            AnimatorControllerParameter[] parameters = animator.parameters;
            for (int i = 0; i < parameters.Length; i++)
            {
                AnimatorControllerParameter parameter = parameters[i];
                if (parameter.type == parameterType && parameter.name == parameterName)
                    return true;
            }

            return false;
        }

        private void HandleBossDamageTaken(float damage)
        {
            if (!IsServer || !isSignaturePatternActive || damage <= 0f)
                return;

            signatureAccumulatedDamage += damage;
        }
    }
}