using System.Collections;
using System.Collections.Generic;
using TMPro;
using UnityEngine;
namespace WildAttack
{
    /// <summary>
    /// 敌人类
    /// </summary>
    public class Enemy : MonoBehaviour
    {
        #region Members
        Transform finalPos;
        private Animator enemyAnim;
        private float speed;
        private int score;
        private int hp;
        private int monsterId;
        private int weaponId;

        /// <summary>
        /// 是否到达目的地
        /// </summary>
        private bool arriveTarget;

        private int atk;
        private float attackIntervalTime;
        Transform armorTrans;
        Transform animTrans;
        /// <summary>
        /// 装备
        /// </summary>
        private Stack<GameObject> ArmorStack;
        /// <summary>
        /// 装备破碎动画
        /// </summary>
        private Stack<GameObject> AnimStack;
        /// <summary>
        /// 存放路径点信息list
        /// </summary>
        private List<Vector2> wayList;
        private int nextWayIndex;
        private AudioSource audioSource;
        private int spawnGroupId;
        private Transform HpBarRoot;
        #endregion

        #region Lifecycle
        private void OnEnable()
        {
            finalPos = GameObject.Find("finalPos").transform;
            HpBarRoot = GameObject.Find("HpBarRoot").transform;
            enemyAnim = GetComponent<Animator>();
            arriveTarget = false;
            nextWayIndex = 0;
            wayList = new List<Vector2>();
            audioSource = GetComponent<AudioSource>();
        }

        bool isBorn = true;
        bool isDead = false;
        Vector3 deadPos;
        // Update is called once per frame
        void Update()
        {
            CheckAnimState();
            if (Vector3.Distance(transform.position, finalPos.position) < 15f)
            {
                GetComponent<Rigidbody>().isKinematic = true;
            }

            // Attack
            // check state
            if (arriveTarget && !isDead && ProcessManager.GetInstance().CurrLevel > 0)
            {
                enemyAnim.SetBool("run1", false);
                enemyAnim.SetBool("run2", false);
                // check distance
                if (attackIntervalTime > 0)
                {
                    attackIntervalTime -= Time.deltaTime;
                }
                else
                {
                    PlayAttackAnim();
                    attackIntervalTime = WeaponModule.GetInstance().GetData(weaponId).cd;
                }
            }

        }

        private void FixedUpdate()
        {
            if (isBorn) return;
            if (isDead) return;
            if (ProcessManager.GetInstance().CurrLevel <= 0) return;
            // change run anim
            if (this.weaponId == 3 && this.hp < 3)
            {
                enemyAnim.SetBool("run2", true);
            }
            else
            {
                enemyAnim.SetBool("run1", true);
            }

            // check arrived
            if (nextWayIndex >= wayList.Count)
            {
                arriveTarget = true;

                return;
            }

            // check distance
            if (Vector2.Distance(new Vector2(transform.position.x, transform.position.z), wayList[nextWayIndex]) < 1.5f)
            {
                nextWayIndex++;
            }
            else
            {
                // 射线检测下个目标点y轴
                Vector3 target = new Vector3(wayList[nextWayIndex].x, transform.position.y, wayList[nextWayIndex].y);
                Ray ray = new Ray(new Vector3(wayList[nextWayIndex].x, transform.position.y + 10, wayList[nextWayIndex].y), -transform.up);
                RaycastHit hitInfo;
                if (Physics.Raycast(ray, out hitInfo, 100, 1 << LayerMask.NameToLayer("Plane")))
                {
                    if (hitInfo.collider.gameObject.layer == LayerMask.NameToLayer("Plane"))
                    {
                        target = new Vector3(wayList[nextWayIndex].x, hitInfo.point.y, wayList[nextWayIndex].y);
                    }
                }

                // 移动
                MoveTowards(target);
            }

        }


        bool isJumping = false;
        GameObject jumpTarget;
        /// <summary>
        /// trigger 触发切换行进路线
        /// </summary>
        /// <param name="other"></param>
        private void OnTriggerEnter(Collider other)
        {
            if (other.gameObject.layer != LayerMask.NameToLayer("WayPoint")) return;

            // 触发检测是路径点或跳跃点
            if (other.gameObject.name.Contains("jumpPoint"))
            {
                // get跳跃目的地
                string index = other.gameObject.name.Split('_')[1];
                if (other.gameObject.name.Split('_')[2] == "1")
                {
                    if (isJumping)
                    {
                        return;
                    }
                    isJumping = true;
                    jumpTarget = GameObject.Find($"jumpPoint_{index}_2");
                    enemyAnim.SetTrigger("jump" + Random.Range(1, 3));
                }
                else if (other.gameObject.name.Split('_')[2] == "2")
                {
                    isJumping = false;
                }
                return;
            }

            // 切换路径点
            int nextGroupID = 0;
            for (int i = 0; i < EnemyManager.GetInstance().GetWayPoints().Length; i++)
            {
                if (Vector3.Distance(other.transform.position, EnemyManager.GetInstance().GetWayPoints()[i].transform.position) < 1f)
                {
                    nextGroupID = i + 1;
                    break;
                }
            }

            SetNewWayPoint(nextGroupID);
        }
        #endregion

        #region Functions
        public void Init(int monsterId, int weaponId, int spawnGroupId)
        {
            isBorn = true;
            transform.GetComponentInChildren<SphereCollider>().enabled = false;
            transform.GetComponentInChildren<CapsuleCollider>().enabled = false;
            transform.GetComponent<Rigidbody>().isKinematic = true;
            isDead = false;
            this.monsterId = monsterId;
            hp = this.monsterId;
            this.weaponId = weaponId;
            this.spawnGroupId = spawnGroupId;
            MonsterData monsterData = MonsterModule.GetInstance().GetData(this.monsterId);
            speed = monsterData.speed;
            score = monsterData.num;

            WeaponData weaponData = WeaponModule.GetInstance().GetData(weaponId);
            atk = weaponData.atk;
            attackIntervalTime = 0;

            // spawnGroupId == -1 默认关卡怪
            if (spawnGroupId <= 0)
            {
                Vector2 pos = GameModule.GetInstance().GetDoubleParams("startMonsterXZ");
                transform.localPosition = new Vector3(pos.x, 10, pos.y);
                // raycast get Y
                Ray ray = new Ray(new Vector3(transform.position.x, 30, transform.position.z), -transform.up);
                RaycastHit hitInfo;
                if (Physics.Raycast(ray, out hitInfo, 100, 1 << LayerMask.NameToLayer("Plane")))
                {
                    if (hitInfo.collider.gameObject.layer == LayerMask.NameToLayer("Plane"))
                    {
                        transform.position = new Vector3(transform.position.x, hitInfo.point.y, transform.position.z);
                    }
                }
                transform.LookAt(Camera.main.transform);
                // 动画
                enemyAnim.SetBool("flag", true);
            }
            else
            {
                transform.localPosition = EnemyManager.GetInstance().GetWayPoints()[spawnGroupId - 1].transform.position;
            }
            enemyAnim.SetTrigger("born");

            // 判断血量 上装备
            if (this.hp > 1)
            {
                ArmorStack = new Stack<GameObject>();
                armorTrans = transform.Find("ArmorTrans");
                for (int i = 0; i < this.hp - 1; i++)
                {
                    GameObject armor = armorTrans.GetChild(i).gameObject;
                    armor.SetActive(true);
                    ArmorStack.Push(armor);
                }

                AnimStack = new Stack<GameObject>();
                animTrans = transform.Find("AnimTrans");
                for (int i = 0; i < this.hp - 1; i++)
                {
                    GameObject anim = animTrans.GetChild(i).gameObject;
                    anim.transform.GetComponentInChildren<Animator>().SetBool("dead", false);
                    anim.SetActive(false);
                    //armorTrans.GetChild(i).GetComponent<SkinnedMeshRenderer>().enabled = true;
                    AnimStack.Push(anim);
                }
            }
        }

        private float voiceTime = 0;
        /// <summary>
        /// 判断动画状态 出生死亡
        /// </summary>
        private void CheckAnimState()
        {
            AnimatorStateInfo animInfo = enemyAnim.GetCurrentAnimatorStateInfo(0);
            if (animInfo.normalizedTime > 0.9f && animInfo.IsName("Born"))
            {
                isBorn = false;
                transform.GetComponentInChildren<SphereCollider>().enabled = true;
                transform.GetComponentInChildren<CapsuleCollider>().enabled = true;
                transform.GetComponent<Rigidbody>().isKinematic = false;
            }
            if (animInfo.IsName("Dead1") || animInfo.IsName("Dead2"))
            {
                transform.position = deadPos;
                if (animInfo.normalizedTime > 0.9f)
                {
                    ResetEnemy();
                    gameObject.SetActive(false);
                    return;
                }
                return;
            }
            else
            {
                // 初始怪随机时间播放随机嘲讽音效
                if (voiceTime <= 0 && spawnGroupId <= 0)
                {
                    audioSource.clip = Resources.Load<AudioClip>($"Voice/Enemy/joke_{Random.Range(1, 5)}");
                    audioSource.Play();
                    Vector2 voiceSpawn = GameModule.GetInstance().GetDoubleParams("monsterATKVoiceTime");

                    voiceTime = Random.Range(voiceSpawn.x, voiceSpawn.y);
                }
                else
                {
                    voiceTime -= Time.deltaTime;
                }
            }
        }

        /// <summary>
        /// 被击
        /// </summary>
        public void Hitted(int damage, bool isHead)
        {
            if (hp <= 0)
            {
                return;
            }
            // 掉血
            hp -= damage;

            // 血量判断
            if (hp <= 0)
            {
                // 是否被箭攻击
                if (damage == 1)
                {
                    audioSource.clip = Resources.Load<AudioClip>("Voice/Enemy/Hitted");
                    audioSource.Play();
                }
                Dead();
                // 气球 运动
                CreateBalloon(transform.position, isHead);
            }
            else
            {
                // 拿矛的敌人血量小于3切换奔跑动画
                if (hp < 3 && this.weaponId == 3)
                {
                    enemyAnim.SetBool("run1", false);
                    enemyAnim.SetBool("run2", true);
                }
                // 被击表现
                for (int i = 0; i < damage; i++)
                {
                    if (ArmorStack.Peek())
                    {
                        GameObject armor = ArmorStack.Pop();
                        armor.SetActive(false);
                    }
                }
                GameObject anim = null;
                for (int i = 0; i < damage; i++)
                {
                    if (AnimStack.Peek())
                    {
                        anim = AnimStack.Pop();
                        StartCoroutine(DestroyArmor(anim));
                    }
                }
                // 装备受击音效
                if (damage == 1)
                {
                    if (anim != null) anim.GetComponent<AudioSource>().Play();
                }
            }

        }

        /// <summary>
        /// 敌人死亡
        /// </summary>
        private void Dead()
        {
            if (!isDead)
            {
                // 敌人死亡表现
                deadPos = transform.position;
                enemyAnim.SetTrigger("dead" + Random.Range(1, 3));
                transform.GetComponentInChildren<SphereCollider>().enabled = false;
                transform.GetComponentInChildren<CapsuleCollider>().enabled = false;

                isDead = true;
                // 初始怪不加分
                if (spawnGroupId > 0)
                {
                    GameMananger.GetInstance().AddScore(score);
                }
            }
        }

        /// <summary>
        /// 掉装备
        /// </summary>
        /// <param name="armor"></param>
        /// <returns></returns>
        IEnumerator DestroyArmor(GameObject armor)
        {
            armor.SetActive(true);
            armor.GetComponentInChildren<Animator>().SetBool("dead", true);
            yield return new WaitForSeconds(1);
            armor.GetComponentInChildren<Animator>().SetBool("dead", false);
            armor.SetActive(false);
        }

        /// <summary>
        /// replace OnDestroy
        /// </summary>
        public void ResetEnemy()
        {
            if (ArmorStack != null && ArmorStack.Count > 0)
            {
                for (int i = 0; i < armorTrans.childCount; i++)
                {
                    //armorTrans.GetChild(i).GetComponentInChildren<Animator>().SetBool("dead", false);
                    //armorTrans.GetChild(i).GetComponent<SkinnedMeshRenderer>().enabled = true;
                    armorTrans.GetChild(i).gameObject.SetActive(false);
                }
                ArmorStack.Clear();
            }
            if (AnimStack != null && AnimStack.Count > 0)
            {
                for (int i = 0; i < AnimStack.Count; i++)
                {
                    if (animTrans.GetChild(i).GetComponentInChildren<Animator>())
                    {
                        animTrans.GetChild(i).GetComponentInChildren<Animator>().SetBool("dead", false);

                    }
                    //armorTrans.GetChild(i).GetComponent<SkinnedMeshRenderer>().enabled = true;
                    animTrans.GetChild(i).gameObject.SetActive(false);
                }
                AnimStack.Clear();

            }
            speed = 0;
            //GetComponent<Rigidbody>().constraints = RigidbodyConstraints.FreezeRotation;
            GetComponent<Rigidbody>().isKinematic = false;
            EnemyManager.GetInstance().enemyList.Remove(this);
            ProcessManager.GetInstance().EnemyDead();
        }

        /// <summary>
        /// 敌人死亡生成气球
        /// </summary>
        /// <param name="pos"></param>
        /// <param name="isHead"></param>
        private void CreateBalloon(Vector3 pos, bool isHead)
        {
            // 爆头非爆头 数量不同
            int num = isHead ? 3 : 2;
            for (int i = 0; i < num; i++)
            {
                GameObject balloon = BalloonPool.GetInstance().GetRedBalloon();
                balloon.transform.position = new Vector3(pos.x - i, pos.y + 2, pos.z - i);
                balloon.SetActive(true);
            }
        }

        private void PlayAttackAnim()
        {
            enemyAnim.SetTrigger($"attack{weaponId}");
        }

        /// <summary>
        /// 攻击逻辑 绑定在animation的Event上
        /// </summary>
        public void Attack()
        {
            if (!GameMananger.GetInstance().isOver)
            {
                audioSource.clip = Resources.Load<AudioClip>("Voice/Enemy/Attack");
                audioSource.Play();
                GameMananger.GetInstance().SubHp(atk);
                GameObject flotage = FlotagePool.GetInstance().GetGameObject();
                flotage.SetActive(true);
                flotage.GetComponent<Flotage>().Init(Camera.main.WorldToScreenPoint(HpBarRoot.position + Vector3.up * 5), -atk, GameModule.GetInstance().GetRGB("BloodLossRGB"), StringModule.GetInstance().GetData("hpUnit"), FlotageTypeEnum.Fixed);
            }
        }

        private void MoveTowards(Vector3 target)
        {
            if (isJumping && (enemyAnim.GetCurrentAnimatorStateInfo(0).IsName("Jump1") || enemyAnim.GetCurrentAnimatorStateInfo(0).IsName("Jump2")) && enemyAnim.GetCurrentAnimatorStateInfo(0).normalizedTime > 0.2f)
            {
                // 冰冻魔法触发后跳跃不到目标点 
                // fixme: 使用配置中的speed
                transform.position = Vector3.Lerp(transform.position, jumpTarget.transform.position + Vector3.up * 2, MonsterModule.GetInstance().GetData(monsterId).speed / 2 * Time.deltaTime);
                return;
            }
            transform.LookAt(target);
            transform.position = Vector3.MoveTowards(transform.position, target, Time.deltaTime * speed);
            // 防止倾斜
            transform.rotation = new Quaternion(0, transform.rotation.y, 0, transform.rotation.w);
        }

        /// <summary>
        /// 速度相关
        /// </summary>
        /// <param name="multiple"></param>
        public void SetSpeed(float multiple)
        {
            speed = MonsterModule.GetInstance().GetData(this.monsterId).speed * multiple;
            transform.Find("Bip001/Bip001 Pelvis/Bip001 Spine/Bip001 Spine1/body/slow").GetComponentInChildren<ParticleSystem>().Play();
        }
        public void ResetSpeed()
        {
            speed = MonsterModule.GetInstance().GetData(this.monsterId).speed;
            transform.Find("Bip001/Bip001 Pelvis/Bip001 Spine/Bip001 Spine1/body/slow").GetComponentInChildren<ParticleSystem>().Stop();
        }

        /// <summary>
        /// 切换路径点list 重新随机
        /// </summary>
        /// <param name="nextGroupID"></param>
        public void SetNewWayPoint(int nextGroupID)
        {
            arriveTarget = false;
            nextWayIndex = 0;

            List<WayPointData> wayDataList = WayPointModule.GetInstance().GetDataByGroup(nextGroupID);
            List<int> weight = new List<int>();
            foreach (var item in wayDataList)
            {
                weight.Add(item.weight);
            }
            wayList = wayDataList[WeightRandomUtils.GetInstance().GetRandomId(weight) - 1].wayPoint;
        }
        #endregion
    }
}