using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Cielonos.MainGame.Buffs.Character;
using Cielonos.MainGame.Characters;
using Cielonos.MainGame.Inventory;
using Cielonos.MainGame.UI;
using Lean.Pool;
using Sirenix.OdinInspector;
using SLSUtilities.General;
using SLSUtilities.LeanPoolAssistance;
using SLSUtilities.WwiseAssistance;
using SLSUtilities.FunctionalAnimation;
using UnityEngine;
using Random = UnityEngine.Random;

namespace Cielonos.MainGame
{
    public abstract partial class AttackAreaBase : SerializedMonoBehaviour
    {
        private static Dictionary<string, int> areaNameCountDictionary = new Dictionary<string, int>();
        
        [Title("References")]
        public CharacterBase creator;
        public ItemBase itemSource;
        public List<Fraction> targetFractions;
        public Transform topParent;
        public Collider areaCollider;
        public Dictionary<string, GameObject> functionalParts;
        
        [Title("Status")]
        public string areaName;
        public string spamGroupName;
        public bool isEnabling;
        public bool canTriggerHitEvent = true;
        public List<string> tags = new List<string>();
        public Action updateAction;

        [Title("Submodules")] 
        [HideInEditorMode] public TransformSubmodule transformSm;
        [HideInEditorMode] public AttackSubmodule attackSm;
        [HideInEditorMode] public TimeSubmodule timeSm;
        [HideInEditorMode] public HitSubmodule hitSm;
        [HideInEditorMode] public MoveSubmoduleBase moveSm;
        [HideInEditorMode] public RaycastSubmodule raycastSm;
        [HideInEditorMode] public ImpulseSubmodule impulseSm;
        [HideInEditorMode] public ReactionSubmodule reactionSm;
        
        public T Initialize<T>(CharacterBase creator, params Fraction[] targetFractions) where T : AttackAreaBase
        {
            return Initialize<T>(creator, null, targetFractions);
        }
        
        public virtual T Initialize<T>(CharacterBase creator, ItemBase itemSource, params Fraction[] targetFractions) where T : AttackAreaBase
        {
            this.isEnabling = false;
            this.creator = creator;
            this.itemSource = itemSource;
            this.targetFractions = targetFractions.ToList();
            this.canTriggerHitEvent = true;
            this.tags = new List<string>();
            
            attackSm = null;
            timeSm = null;
            hitSm = null;
            moveSm = null;
            raycastSm = null;
            impulseSm = null;
            reactionSm = null;
            
            areaCollider = GetComponent<Collider>();

            // 通过 VFXObject 组件确定 VFX 顶层节点，比遍历 parent 链更可靠。
            VFXObject vfxObject = GetComponentInParent<VFXObject>();
            this.topParent = vfxObject != null ? vfxObject.transform : transform;

            if (!areaNameCountDictionary.TryAdd(topParent.name, 1))
            {
                areaNameCountDictionary[topParent.name]++;
            }
            areaName = $"{topParent.name}_{areaNameCountDictionary[topParent.name]}";
            spamGroupName = creator.name + (itemSource != null ? $"_{itemSource.name}" : "");
            
            foreach (TrailRenderer trail in GetComponentsInChildren<TrailRenderer>())
            {
                trail.Clear();
            }

            this.SetReactionSubmodule<T>();

            CombatManager.AttackAreaSm.Register(this);
            if (vfxObject != null)
            {
                vfxObject.onDespawnAction = () =>
                {
                    CombatManager.AttackAreaSm.Unregister(this);
                };
            }
            
            this.isEnabling = true;
            
            return this as T;
        }
        
        protected virtual void Update()
        {
            transformSm?.Update();
            raycastSm?.Update();
            updateAction?.Invoke();
            hitSm?.Update();
            timeSm?.Update();
            moveSm?.Update();
        }
    }

    public partial class AttackAreaBase
    {
        #region TransformSubmodule

        public T SetTransformSubmodule<T>(Transform target = null, float delay = 0) where T : AttackAreaBase
        {
            transformSm = new TransformSubmodule(this, target, delay);
            return this as T;
        }

        #endregion
        
        #region AttackSubmodule

        public T SetAttackSubmodule<T>(AttackUnit attackUnit, GameObject hitVFX = null) where T : AttackAreaBase
        {
            if (attackUnit.useVFXDataHit)
            {
                hitVFX ??= itemSource != null
                    ? itemSource.vfxData.Get(attackUnit.vfxUnitName).hitVFX
                    : creator.vfxData.Get(attackUnit.vfxUnitName).hitVFX;
            }
            else
            {
                hitVFX ??= attackUnit.GetHitVFX();
            }
            attackSm = new AttackSubmodule(this, attackUnit, hitVFX);
            return this as T;
        }

        #endregion
        
        #region TimeSubmodule
        public T SetTimeSubmodule<T>(float lifeTime) where T : AttackAreaBase
        {
            timeSm = new TimeSubmodule(this, lifeTime);
            return this as T;
        }

        public T SetTimeSubmodule<T>(float lifeTime, float delayTime, float enableTime = 0.04f, 
            Action enableAction = null, Action timeOutAction = null) where T : AttackAreaBase
        {
            timeSm = new TimeSubmodule(this, lifeTime, delayTime, enableTime, enableAction, timeOutAction);
            return this as T;
        }
        #endregion
        
        #region HitSubmodule
        public T SetHitSubmodule<T>() where T : AttackAreaBase
        {
            hitSm = new HitSubmodule(this);
            return this as T;
        }
        
        public T SetHitSubmodule<T>(float hitInterval, int hitCount) where T : AttackAreaBase
        {
            hitSm = new HitSubmodule(this, hitInterval, hitCount);
            return this as T;
        }
        #endregion

        #region LinearDirectionMoveModule
        public T SetLinearDirectionMoveModule<T>(Vector3 direction, float speed, 
            float acceleration = 0, bool overrideRotation = true, bool disableNegative = true, bool stopWhenHit = true,
            float timeScaleCoefficient = 1) where T : AttackAreaBase
        {
            moveSm = new LinearDirectionMoveSubmodule(this, direction, speed, acceleration,
                overrideRotation, disableNegative, stopWhenHit, timeScaleCoefficient);
            return this as T;
        }
        #endregion

        #region TraceMoveModule

        /// <summary>
        /// 设置自适应追踪移动子模块，根据和目标的距离自动连接和断开追踪
        /// 断开追踪后，自动选择范围内最近的目标进行追踪
        /// </summary>
        public T SetAdaptiveTraceMoveModule<T>(CharacterBase target, float moveSpeed, float moveAcceleration,
            float angularSpeed, float angularAcceleration, Vector3 initialDirection, 
            bool autoConnect = true, bool autoDisconnect = true, float detectRadius = 20f, bool stopWhenHit = true) where T : AttackAreaBase
        {
            moveSm = new TraceMoveSubmodule(this, target, moveSpeed, moveAcceleration, angularSpeed, 
                angularAcceleration, initialDirection, autoConnect, autoDisconnect, detectRadius, stopWhenHit);
            return this as T;
        }

        /// <summary>
        /// 设置不可更改目标的追踪移动子模块
        /// 永远追踪指定目标，不会断开
        /// </summary>
        public T SetUnchangeableTraceMoveModule<T>(CharacterBase target, float moveSpeed, float moveAcceleration,
            float angularSpeed, float angularAcceleration, Vector3 initialDirection, bool stopWhenHit = true) where T : AttackAreaBase
        {
            moveSm = new TraceMoveSubmodule(this, target, moveSpeed, moveAcceleration, angularSpeed, 
                angularAcceleration, initialDirection, false, false, 0, stopWhenHit);
            return this as T;
        }
        
        /// <summary>
        /// 设置可分离目标的追踪移动子模块
        /// 一旦目标超出检测范围则断开追踪，断开后不再追踪其他目标
        /// </summary>
        public T SeDetachableTraceMoveModule<T>(CharacterBase target, float moveSpeed, float moveAcceleration,
            float angularSpeed, float angularAcceleration, Vector3 initialDirection, 
            float detectRadius = 10f, bool stopWhenHit = true) where T : AttackAreaBase
        {
            moveSm = new TraceMoveSubmodule(this, target, moveSpeed, moveAcceleration, angularSpeed, 
                angularAcceleration, initialDirection, false, true, detectRadius, stopWhenHit);
            return this as T;
        }
        
        #endregion
        
        #region RaycastSubmodule
        /// <summary>
        /// 设置射线检测子模块
        /// </summary>
        /// <param name="direction">射线方向</param>
        /// <param name="rayRadius">球形射线半径，若小于等于0则为直线射线</param>
        /// <param name="rayLength">射线长度，若小于0则为动态长度（与移动速度相等）</param>
        public T SetRaycastSubmodule<T>(Vector3 direction = default, float rayRadius = -1f, float rayLength = -1f) where T : AttackAreaBase
        {
            raycastSm = new RaycastSubmodule(this, direction, rayLength, rayRadius);
            raycastSm.Update();
            return this as T;
        }
        #endregion
        
        #region ImpulseSubmodule
        /// <summary>
        /// 创建脉冲子模块并返回实例，后续通过链式 With* 方法配置力模式和参数。
        /// 注意：此方法返回 ImpulseSubmodule 而非 AttackAreaBase，因此应在主链末尾调用或单独使用。
        /// </summary>
        public ImpulseSubmodule SetImpulseSubmodule(float duration = 0.5f, AnimationCurve curve = null)
        {
            impulseSm = new ImpulseSubmodule(this, duration, curve);
            return impulseSm;
        }
        #endregion

        #region ReactionSubmodule
        public T SetReactionSubmodule<T>() where T : AttackAreaBase
        {
            reactionSm = new ReactionSubmodule(this);
            return this as T;
        }
        
        public T SetReactionSubmodule<T>(bool canBeBlocked, bool hasPerfectBlock, bool canBreakBlock,
            bool canBeDodged, bool hasPerfectDodge, bool canBreakDodge, bool canBeReflected) where T : AttackAreaBase
        {
            reactionSm = new ReactionSubmodule(this);
            reactionSm.SetBlock(canBeBlocked, hasPerfectBlock, canBreakBlock);
            reactionSm.SetDodge(canBeDodged, hasPerfectDodge, canBreakDodge);
            reactionSm.SetReflection(canBeReflected);
            return this as T;
        }
        #endregion
    }

    public partial class AttackAreaBase
    {
        /// <summary>
        /// 检查目标角色是否为有效攻击目标：非创建者自身，且属于目标阵营。
        /// </summary>
        public bool IsValidTarget(CharacterBase target)
        {
            if (target == null || target == creator) return false;
            return targetFractions.Contains(target.fraction);
        }
        
        public virtual void HitCharacter(Collider characterCollider, Vector3 hitPosition)
        {
            
        }

        public virtual void HitEnvironment(Collider other, Vector3 hitPosition)
        {
            
        }

        protected virtual void HitOnTarget(Collider hitCollider, Vector3 hitPosition, out Attack.Result attackResult)
        {
            CharacterBase target = hitCollider.GetComponentInParent<CharacterBase>();
            
            // Phase 1: 构建上下文
            var context = new Attack.Context(creator, target, spamGroupName, hitPosition);
            attackResult = new Attack.Result(context);
            
            AttackUnit attackUnit = attackSm!.attackUnit;

            if (target == null)
            {
                return;
            }

            if (moveSm is { stopWhenHit: true })
            {
                moveSm.canMove = false;
            }

            attackResult.isBlocked = reactionSm?.CheckBlock(target, creator, hitPosition) ?? false;
            attackResult.isDodged = reactionSm?.CheckDodge(target) ?? false;
            attackResult.isReflected = reactionSm?.CheckReflection(target) ?? false;
            attackResult.isMissed = false;
            attackResult.isEvaded = false;
            attackResult.causedDeath = false;

            if (!attackResult.isBlocked && !attackResult.isDodged &&
                !attackResult.isMissed && !attackResult.isEvaded)
            {
                // 被动闪避概率判定（独立于动作帧主动闪避）
                float evasionProbability = target.attributeSm[CharacterAttribute.EvasionProbability];
                if (evasionProbability > 0f && Random.value < evasionProbability)
                {
                    attackResult.isEvaded = true;
                }
            }

            if (!attackResult.isBlocked && !attackResult.isDodged &&
                !attackResult.isMissed && !attackResult.isEvaded)
            {
                // 无论攻击是否 invalid，都需要填充 context.value 以供 breakthrough/disruption 读取
                if (attackUnit.isIndependentPerHit)
                {
                    attackSm.attackValue = attackSm.attackUnit.GetAttackValue(creator);
                }
                context.value = attackSm.attackValue.Clone();

                if (!attackUnit.isInvalidAttack)
                {
                    // Phase 2: 前置事件，订阅者通过 Context 修改攻击参数
                    creator.eventSm.onStartAttack.Invoke(this, target, context);
                    target.eventSm.onBeforeGetAttacked.Invoke(this, context);

                    for (var index = 0; index < target.buffSm.buffList.Count; index++)
                    {
                        var eventBuff = target.buffSm.buffList[index];
                        eventBuff.eventSubmodule?.onBeforeGetAttacked.Invoke(this, context);
                    }

                    if (context.isImmune || context.isForcedInterrupt)
                    {
                        return; // 被机制一票否决，直接短路
                    }
                }
                
                // 从 context.value 读取，因为前置事件可能已修改这些值
                Breakthrough.Type breakthroughType = context.value.breakthroughType;
                DisruptionType disruptionType = context.value.disruptionType;
                Vector3 direction = (target.centerPoint.position - creator.centerPoint.position).normalized;
                //TODO: 后续制作更详细的打断和击退处理
                bool canBreakthrough = target.CheckBreakthrough(breakthroughType);
                bool canDisrupt = target.CheckDisruption(disruptionType);
                if (target.buffSm.TryGetBuff(out BreakthroughResistanceModification buff))
                {
                    if (canBreakthrough && canDisrupt)
                    {
                        attackSm.breakthroughAction?.Invoke(target, hitPosition);
                        target.eventSm.onGetBreakthrough?.Invoke(this);
                        target.renderSc.SpawnShatters(breakthroughType, direction);
                    }
                }
                bool disrupted = target.GetHit(breakthroughType, out float recoveryTime, disruptionType, direction);
                
                //受击事件
                InvokeHitEvents(target, hitPosition);
                
                //特效
                GenerateHitEffect(target, hitCollider, hitPosition);
                
                //音效
                PlaySoundFX(hitPosition);
                
                if (!attackUnit.isInvalidAttack)
                {
                    // Phase 3: 伤害结算
                    target.TakeDamage(attackResult, out _);
                    
                    // Phase 4: 后置事件，订阅者通过 Result 读取结算结果
                    // onHealthChanged 已由 AttributeSubmodule 值变更回调在 TakeDamage 内部自动触发
                    creator.eventSm.onFinishAttack.Invoke(this, target, attackResult);
                    if (attackResult.finalDamage > 0)
                    {
                        target.eventSm.onAfterGetAttacked.Invoke(this, attackResult);
                        for (var index = 0; index < target.buffSm.buffList.Count; index++)
                        {
                            var eventBuff = target.buffSm.buffList[index];
                            eventBuff.eventSubmodule?.onAfterGetAttacked.Invoke(this, attackResult);
                        }
                    }
                }
            }
            
            //应用额外力
            if (!attackResult.causedDeath && 
                !attackResult.isBlocked && !attackResult.isDodged && 
                !attackResult.isMissed && !attackResult.isEvaded)
            {
                impulseSm?.ApplyImpulse(target);
            }
        }
    }

    public partial class AttackAreaBase
    {
        protected virtual void InvokeHitEvents(CharacterBase target, Vector3 hitPosition)
        {
            hitSm.InvokeAllHitEvents(target, hitPosition);
            if (target is Automata automata)
            {
                automata.behaviorSc.DispatchContextEvent("GetHit");
            }
            target.eventSm.onGetHit.Invoke(this);
        }

        protected virtual GameObject GenerateHitEffect(CharacterBase target, Collider hitCollider, Vector3 hitPosition)
        {
            GameObject hitEffect = attackSm.SpawnHitVFX(creator, hitPosition);
            attackSm.modifyHitEffectAction?.Invoke(hitEffect, target);
            return hitEffect;
        }
        
        protected virtual GameObject GenerateHitEffect(Vector3 hitPosition)
        {
            GameObject hitEffect = attackSm.SpawnHitVFX(creator, hitPosition);
            attackSm.modifyHitEffectAction?.Invoke(hitEffect, null);
            return hitEffect;
        }

        protected virtual void PlaySoundFX(Vector3 hitPosition, uint soundID = AkUnitySoundEngine.AK_INVALID_PLAYING_ID)
        {
            if (soundID == AkUnitySoundEngine.AK_INVALID_PLAYING_ID)
            {
                if (hitSm.isAutoPlayHitSound)
                {
                    hitSm.hitSoundList.ForEach(hitSound =>
                    {
                        AudioManager.Post(hitSound, hitPosition);
                    });
                }
            }
            else
            {
                AudioManager.Post(soundID, hitPosition);
            }
        }
    }

    public class AttackAreaSubmoduleBase : SubmoduleBase<AttackAreaBase>
    {
        protected AttackAreaBase attackArea => owner;
        public bool isEnabling;
        
        public AttackAreaSubmoduleBase(AttackAreaBase owner) : base(owner)
        {
            isEnabling = true;
        }
    }
}