using System;
using System.Collections.Generic;
using ActionGameFramework.Audio;
using ActionGameFramework.Health;
using Core.Health;
using TowerDefense.Targetting;
using TowerDefense.Towers;
using TowerDefense.Towers.Projectiles;
using UnityEngine;
using KTGMGemClient;
using TowerDefense.Agents;
using TowerDefense.Level;

namespace TowerDefense.Affectors
{
    /// <summary>
    /// The common effect for handling firing projectiles to attack
    /// 
    /// Requires an ILauncher but it is not automatically added
    /// Add an ILauncher implementation to this GameObject before you add this script
    /// </summary>
    [RequireComponent(typeof(ILauncher))]
    public class AttackAffector : Affector, ITowerRadiusProvider
    {
        /// <summary>
        /// The projectile used to attack
        /// </summary>
        public GameObject projectile;

        /// <summary>
        /// 木塔最后一击是特殊攻击，需要替换projectile
        /// </summary>
        public GameObject woodProjectile_SP;

        /// <summary>
        /// The list of points to launch the projectiles from
        /// </summary>
        public Transform[] projectilePoints;

        /// <summary>
        /// The reference to the center point where the tower will search from
        /// </summary>
        public Transform epicenter;

        /// <summary>
        /// 如果是多目标攻击，最多攻击目标
        /// </summary>
        public int maxAttackNum = 1;

        /// <summary>
        /// 是否木属性数据
        /// </summary>
        public bool bWoodAffector = false;

        /// <summary>
        /// The audio source to play when firing
        /// </summary>
        public RandomAudioSource randomAudioSource;

        /// <summary>
        /// Gets the targetter
        /// </summary>
        public Targetter towerTargetter;

        /// <summary>
        /// Color of effect radius visualization
        /// </summary>
        public Color radiusEffectColor;

        /// <summary>
        /// Search condition
        /// </summary>
        public Filter searchCondition;

        /// <summary>
        /// Fire condition
        /// </summary>
        public Filter fireCondition;

        /// <summary>
        /// The reference to the attached launcher
        /// </summary>
        protected ILauncher m_Launcher;

        /// <summary>
        /// The time before firing is possible
        /// </summary>
        protected float m_FireTimer;

        protected float freezeBreathTimer;

        /// <summary>
        /// Reference to the current tracked enemy
        /// </summary>
        protected Targetable m_TrackingEnemy;

        public TowerLevel towerLevel;

        /// <summary>
        /// 处理装弹时间.
        /// </summary>
        protected float fillBulletTime = 0.0f;

        /// <summary>
        /// 火精灵充能时间
        /// </summary>
        protected float energyCalTime = 0;

        protected float fInEnergy = 0;

        protected float fBackupTimer = 0.0f;

        /// <summary>
        /// 水精灵的充能时间
        /// </summary>
        protected float freezeBreathCallTime = 0;

        protected float inFreezeBreath;

        protected float freezeBreathBackTimer = 0;

        private int towerAttributeId;

        /// <summary>
        /// 火精灵技能固定攻击倍速
        /// </summary>
        /// <value></value>
        protected float fireSpeed { get; set; } = 5f;

        /// <summary>
        /// 木属性精灵蓄力时间
        /// </summary>
        protected float woodChargeTime { get; set; } = 1.5f;

        protected float woodRemainChargeTime { get; set; }

        /// <summary>
        /// 蓄力特效时间
        /// </summary>
        protected float woodChargeEffectTime { get; set; }

        /// <summary>
        /// 木属性精灵蓄力特效
        /// </summary>
        public ParticleSystem WoodChargeEffect;

        public Transform WoodChargeTransform;

        /// <summary>
        /// 木属性正在瞄准的Agent
        /// </summary>
        protected Agent woodAimAgent;

        /// <summary>
        /// 火精灵攻击最终攻击倍速，里面计算了buff增加的倍速
        /// </summary>
        /// <value></value>
        public float finalFireSpeed
        {
            get
            {
                FireRateAdd fireRateAdd = (FireRateAdd)EndlessBuffManager.instance.GetBuffInstanceByType(EndlessBuffEffectType.FireRateAdd);
                float rateAdd = 0;

                if (fireRateAdd != null)
                    rateAdd = fireRateAdd.GetFireSpeedAdd(towerPtr.ElfId);
                return rateAdd > 1 ? rateAdd : fireSpeed;
            }
        }

        /// <summary>
        /// Gets the search rate from the targetter
        /// </summary>
        public float searchRate
        {
            get { return towerTargetter.searchRate; }
            set { towerTargetter.searchRate = value; }
        }

        /// <summary>
        /// Gets the targetable
        /// </summary>
        public Targetable trackingEnemy
        {
            get { return m_TrackingEnemy; }
        }

        /// <summary>
        /// Gets or sets the attack radius
        /// </summary>
        public float effectRadius
        {
            get { return towerTargetter.effectRadius; }
        }

        public Color effectColor
        {
            get { return radiusEffectColor; }
        }

        public Targetter targetter
        {
            get { return towerTargetter; }
        }

        /// <summary>
        /// Initializes the attack affector
        /// </summary>
        public override void Initialize(IAlignmentProvider affectorAlignment)
        {
            Initialize(affectorAlignment, -1);
        }

        /// <summary>
        /// 返回可能存在的Targetter.
        /// </summary>
        /// <returns></returns>
        public override TowerDefense.Targetting.Targetter GetTargetter()
        {
            return targetter;
        }

        /// <summary>
        /// Initialises the  attack affector with a layer mask
        /// </summary>
        public override void Initialize(IAlignmentProvider affectorAlignment, LayerMask mask)
        {
            base.Initialize(affectorAlignment, mask);
            SetUpTimers();

            towerTargetter.ResetTargetter();
            towerTargetter.alignment = affectorAlignment;
            towerTargetter.acquiredTarget += OnAcquiredTarget;
            // towerTargetter.lostTarget += OnLostTarget;

            myTower = transform.parent.GetComponent<TowerLevel>();
            GetAudioEnum();

        }
        private AudioEnum audioEnum;//当前音乐的种类

        void GetAudioEnum()
        {
            //小怪身上也有这个脚本，塔的名字做了更改，所以判断条件需要变成transform.parent.parent
            if (transform.parent.parent != null)
            {
                if (transform.parent.parent.name.StartsWith("GrowUpTower"))
                {
                    //火元素
                    audioEnum = AudioEnum.FireTAttack;
                }
                else if (transform.parent.parent.name.StartsWith("BlinkTower"))
                {
                    //木元素
                    audioEnum = AudioEnum.WoodTAttack;
                }
                else if (transform.parent.parent.name.StartsWith("CopyCatTower"))
                {
                    //水元素
                    audioEnum = AudioEnum.WaterTAttack;
                }
            }

        }

        void OnDestroy()
        {
            towerTargetter.acquiredTarget -= OnAcquiredTarget;
            // towerTargetter.lostTarget -= OnLostTarget;
        }

        void OnAcquiredTarget(Targetable acquiredTarget)
        {
            // m_TrackingEnemy = acquiredTarget;
        }

        public Damager damagerProjectile
        {
            get { return projectile == null ? null : projectile.GetComponent<Damager>(); }
        }

        public Damager damagerProjectile1
        {
            get { return projectile == null ? null : projectile.GetComponent<Damager>(); }
        }

        public Damager damagerProjectile2
        {
            get { return projectile == null ? null : projectile.GetComponent<Damager>(); }
        }

        /// <summary>
        /// Initialise the RepeatingTimer
        /// </summary>
        protected virtual void SetUpTimers()
        {
            m_Launcher = GetComponent<ILauncher>();
        }

        TowerLevel myTower;
        bool fireState = false;
        protected void updateTowerSkillData()
        {
            HandleBullet();
            HandleEnergy();
            HandleFreezeBreath();
        }

        // 处理木精灵装填子弹
        private void HandleBullet()
        {
            if (woodRemainChargeTime > 0f)
                woodRemainChargeTime -= Time.deltaTime;

            if (woodChargeEffectTime > 0f)
            {
                woodChargeEffectTime -= Time.deltaTime;
                UpdateWoodAim();

                if (woodChargeEffectTime <= 0)
                {
                    towerPtr.IsWoodCharge = false;
                    CancelWoodAim();
                    WoodChargeEffect.Stop();
                }
            }

            // 预留出来装填子弹的时间.
            if (fillBulletTime > 0)
            {
                fillBulletTime -= Time.deltaTime;
                if (fillBulletTime <= 0.3f)
                {
                    if (towerPtr && towerPtr.bulletCtl)
                        towerPtr.bulletCtl.ResetToMaxBullet();
                }

                if (fillBulletTime <= 0)
                {
                    fillBulletTime = 0;
                }
            }
        }

        /// <summary>
        /// 更新木属性瞄准
        /// </summary>
        private void UpdateWoodAim()
        {
            // 离得最近的 Agent
            Agent agent = AgentInsManager.instance.GetMinDisAgent(waveLineID, false);

            if (agent != null)
            {
                // 还没有瞄准目标，直接分配
                if (woodAimAgent == null)
                {
                    woodAimAgent = agent;
                    towerPtr.WoodAimAgent = agent;

                    if (agent.WoodAimCount == 0)
                        agent.PlayWoodAimEffect();

                    ++agent.WoodAimCount;
                }
                // 有小怪走到之前瞄准目标的前面 或者 之前瞄准的目标死亡，切换瞄准目标
                else if (woodAimAgent.Id != agent.Id)
                {
                    if (woodAimAgent.WoodAimCount > 0)
                    {
                        --woodAimAgent.WoodAimCount;

                        if (woodAimAgent.WoodAimCount == 0)
                            woodAimAgent.StopWoodAimEffect();
                    }

                    woodAimAgent = agent;
                    towerPtr.WoodAimAgent = agent;

                    if (agent.WoodAimCount == 0)
                        agent.PlayWoodAimEffect();

                    ++agent.WoodAimCount;
                }
            }
        }

        /// <summary>
        /// 取消木属性瞄准
        /// </summary>
        private void CancelWoodAim()
        {
            if (woodAimAgent != null)
            {
                if (woodAimAgent.WoodAimCount > 0)
                {
                    --woodAimAgent.WoodAimCount;

                    if (woodAimAgent.WoodAimCount == 0)
                        woodAimAgent.StopWoodAimEffect();
                }
            }

            woodAimAgent = null;
        }

        // 处理火精灵充能
        private void HandleEnergy()
        {
            // 充能时间的处理
            if (towerPtr && towerPtr.energyCtl)
            {
                if (fInEnergy <= 0)
                {
                    energyCalTime += Time.deltaTime;
                    float process = energyCalTime % 11.0f;
                    int proint = (int)Math.Floor(process);
                    proint += towerPtr.uiProOffset;
                    towerPtr.energyCtl.SetEnergyProcessFloat(process);
                    if (proint == 10)
                    {
                        fireState = true;
                        fInEnergy = finalFireSpeed;
                        // 设置多倍攻击速度
                        fBackupTimer = m_FireTimer;
                        m_FireTimer = m_FireTimer / finalFireSpeed;

                        towerPtr.uiProOffset = 0;
                        towerPtr.PlayEnergyEffect(true);
                    }
                }
                else
                {
                    fInEnergy -= Time.deltaTime;
                    if (fInEnergy <= 0)
                    {
                        fireState = false;
                        //EventCenter.Ins.BroadCast((int)KTGMGemClient.EventType.FireTowerChargeEnd);
                        fInEnergy = 0.0f;
                        energyCalTime = 0.0f;
                        towerPtr.energyCtl.SetEnergyProgress(0);

                        // 恢复正常攻击速度 
                        m_FireTimer = fBackupTimer;

                        towerPtr.PlayEnergyEffect(false);

                    }
                }
            }
        }

        // 处理水精灵的充能
        private void HandleFreezeBreath()
        {
            if (towerPtr && towerPtr.FreezeBreathCtrl)
            {
                Damager damager = projectile.gameObject.GetComponent<Damager>();

                if (inFreezeBreath <= 0)
                {
                    freezeBreathCallTime += Time.deltaTime;
                    float process = freezeBreathCallTime % (FreezeBreath.ChargeTime + 1);
                    int processInt = (int)Mathf.Floor(process);
                    processInt += towerPtr.FreezeBreathProgressOffset;
                    towerPtr.FreezeBreathCtrl.SetProgress(process);

                    if (processInt == (int)Mathf.Floor(FreezeBreath.ChargeTime))
                    {
                        inFreezeBreath = towerPtr.FreezeBreathCtrl.SkillTime;
                        towerPtr.FreezeBreathProgressOffset = 0;
                        towerPtr.PlayFreezeBreathEffect(true);
                        towerPtr.FreezeBreathCtrl.ReleaseCount = 1;
                        towerPtr.FreezeBreathCtrl.PlayFreezeEffect(waveLineID);
                        towerPtr.FreezeBreathCtrl.ReleaseFreeze(waveLineID, towerPtr, damager.alignmentProvider);
                    }
                }
                else
                {
                    inFreezeBreath -= Time.deltaTime;
                    int time = Mathf.FloorToInt(towerPtr.FreezeBreathCtrl.EffectTime / (towerPtr.FreezeBreathCtrl.DamageCount - 1) * 10);
                    int interval = Mathf.FloorToInt(inFreezeBreath * 10);
                    int offset = Mathf.FloorToInt(towerPtr.FreezeBreathCtrl.SkillTime * 10) - Mathf.FloorToInt(towerPtr.FreezeBreathCtrl.EffectTime * 10);

                    if (interval == time * (towerPtr.FreezeBreathCtrl.DamageCount - towerPtr.FreezeBreathCtrl.ReleaseCount - 1) + offset && towerPtr.FreezeBreathCtrl.ReleaseCount < towerPtr.FreezeBreathCtrl.DamageCount)
                    {
                        ++towerPtr.FreezeBreathCtrl.ReleaseCount;
                        towerPtr.FreezeBreathCtrl.ReleaseFreeze(waveLineID, towerPtr, damager.alignmentProvider);
                    }

                    if (inFreezeBreath <= 0)
                    {
                        inFreezeBreath = 0;
                        freezeBreathCallTime = 0;
                        towerPtr.FreezeBreathCtrl.SetProgress(0);
                        towerPtr.PlayFreezeBreathEffect(false);
                    }
                }
            }
        }

        /// <summary>
        /// This function is called when the object becomes enabled and active.
        /// </summary>
        void OnEnable()
        {
            if (towerPtr && towerPtr.energyCtl)
            {
                if (fireState)
                {
                    towerPtr.PlayEnergyEffect(true);
                }
            }

            // 如果在木属性蓄力期间，让瞄准动画播放
            if (towerPtr && towerPtr.IsWoodCharge && woodAimAgent != null)
                woodAimAgent.PlayWoodAimEffect();
        }

        /// <summary>
        /// This function is called when the behaviour becomes disabled or inactive.
        /// </summary>
        void OnDisable()
        {
            if (towerPtr && towerPtr.energyCtl)
            {
                towerPtr.PlayEnergyEffect(false, false);
            }

            if (towerPtr && towerPtr.FreezeBreathCtrl)
                towerPtr.PlayFreezeBreathEffect(false, false);
        }

        /// <summary>
        /// Update the timers
        /// </summary>
        protected virtual void Update()
        {
            if (m_Launcher == null || towerPtr != null && !towerPtr.CanAttack) return;

            // 处理当前Affector所在Tower对应的技能
            updateTowerSkillData();

            m_FireTimer -= Time.deltaTime;
            m_TrackingEnemy = targetter.GetTarget(waveLineID, bWoodAffector);

            if (m_TrackingEnemy != null && m_FireTimer < 0)
            {
                m_FireTimer = towerLevel.GetFireRate();

                if (fInEnergy > 0)
                    m_FireTimer /= finalFireSpeed;

                towerLevel.FireSpeed = fInEnergy > 0 ? finalFireSpeed : 1f;

                if (towerPtr && towerPtr.bulletCtl != null)
                {
                    int bnum = towerPtr.bulletCtl.GetCtlProgress();

                    // 蓄力时间内不攻击
                    if (bnum == 0 || woodRemainChargeTime > 0f) return;
                }

                if (towerPtr && towerPtr.FreezeBreathCtrl != null)
                {
                    // 冷冻气息期间不攻击
                    if (inFreezeBreath > 0.0001f) return;
                }

                towerLevel.ChangeState(TowerActionState.Attack);
            }
        }

        /// <summary>
        /// Common logic when attacking
        /// 调用攻击的核心函数，由这个函数发起真正的攻击，多目标或者单目标
        /// </summary>
        public virtual void FireProjectile()
        {
            m_TrackingEnemy = targetter.GetTarget(waveLineID, bWoodAffector);
            GameObject go = damagerProjectile.gameObject;

            if (m_TrackingEnemy == null || fillBulletTime > 0) return;

            Damager goDamager = go.GetComponent<Damager>();
            goDamager.IsEnhancedBullet = false;
            goDamager.TowerPtr = towerPtr;

            // 处理子弹充能相关的内容
            if (towerPtr && towerPtr.bulletCtl != null)
            {
                int bnum = towerPtr.bulletCtl.decBullet();
                // 暴击子弹的数量，如果获得相应buff可能会修改暴击子弹数量
                int critBulletNum = towerPtr.bulletCtl.CritBulletNum;

                if (bnum < critBulletNum)
                {
                    if (bnum == 0)
                        // 不需要装填时间
                        fillBulletTime = 0.1f;

                    //这里需要替换特效
                    var poolable = Core.Utilities.Poolable.TryGetPoolable<Core.Utilities.Poolable>(woodProjectile_SP);
                    go = poolable.gameObject;
                    Damager tmpDamager = go.GetComponent<Damager>();
                    tmpDamager.damageMulti = 10.0f;
                    tmpDamager.damage = damagerProjectile.damage;
                    tmpDamager.IsEnhancedBullet = true;
                    tmpDamager.TowerPtr = towerPtr;
                }

                // 下一颗子弹是强化子弹，然后直接蓄力
                if (bnum - 1 >= 0 && bnum - 1 < critBulletNum)
                {
                    woodRemainChargeTime = woodChargeTime;
                    towerPtr.IsWoodCharge = true;
                    DecreaseWoodChargeTime decreaseWoodChargeTime = (DecreaseWoodChargeTime)EndlessBuffManager.instance.GetBuffInstanceByType(EndlessBuffEffectType.DecreaseWoodChargeTime);

                    if (decreaseWoodChargeTime != null)
                        woodRemainChargeTime = decreaseWoodChargeTime.GetWoodChargeTime(woodChargeTime);

                    woodChargeEffectTime = woodRemainChargeTime + 0.5f / towerLevel.ActionAnimator.speed;
                    WoodChargeEffect.Play();
                }
            }

            if (Targetter.bSearchTarget)
            {
                m_Launcher.Launch(m_TrackingEnemy, go, projectilePoints);
                if (AudioSourceManager.Ins)
                    AudioSourceManager.Ins.Play(audioEnum);
            }
        }

        /// <summary>
        /// A delegate to compare distances of components
        /// </summary>
        /// <param name="first"></param>
        /// <param name="second"></param>
        protected virtual int ByDistance(Targetable first, Targetable second)
        {
            float firstSqrMagnitude = Vector3.SqrMagnitude(first.position - epicenter.position);
            float secondSqrMagnitude = Vector3.SqrMagnitude(second.position - epicenter.position);
            return firstSqrMagnitude.CompareTo(secondSqrMagnitude);
        }

#if UNITY_EDITOR
        /// <summary>
        /// Draws the search area
        /// </summary>
        void OnDrawGizmosSelected()
        {
            Gizmos.DrawWireSphere(epicenter.position, towerTargetter.effectRadius);
        }
#endif
    }

    /// <summary>
    /// A delegate for boolean calculation logic
    /// </summary>
    public delegate bool Filter();
}