using DG.Tweening;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.AI;

public class CharacterAI : MonoBehaviour
{
    public NavMeshAgent agent;

    private void Start()
    {
        agent.updateRotation = false;

        character.OnDie += OnDie;
        character.OnHit += OnHit;
        character.OnResurrection += OnResurrection;
    }
    private void OnEnable()
    {
        OnInitialized();//초기화 시작

        timeAtk_Last = Time.realtimeSinceStartup;
        InvokeRepeating("BehaviorChase", Random.Range(0, chaseTime), chaseTime);
    }
    private void OnDisable()
    {
        CancelInvoke();
        agent.enabled = false;
    }
    public bool LOCK = false;
    /// <summary>
    /// AI 의 행동을 제한 하거나 해제합니다.
    /// </summary>
    /// <param name="LOCK"></param>
    void AgentEnabled(bool LOCK)
    {
        this.LOCK = LOCK;
        MoveStop(LOCK);//중지 요청
    }
    [HideInInspector]
    public bool isMove = false;
    /// <summary>
    /// AI 의 이동 상태를 적용합니다.
    /// </summary>
    /// <param name="IDLE">대기 모션으로 전환</param>
    /// <param name="FORCE">강제 재생</param>
    void MoveStop(bool IDLE = false, bool FORCE = false)
    {
        isMove = false;

        if (IDLE)
            motion.Play(Motion.Type.Idle, FORCE);

        if (agent.enabled)
        {
            agent.velocity = Vector3.zero;
            agent.isStopped = true;
        }
    }

    [Header("초기화")]
    public Character character;
    public HitCheck hitCheck;//플레이어 충돌 시 데미지를 주기위한 오브젝트
    public Radar radarChase;
    public Radar radarAttack;
    int layerEnemy = 0;
    CharacterData data;
    /// <summary>
    /// AI 의 초기화를 진해합니다.
    /// </summary>
    private void OnInitialized()
    {
        if (data == null)
        {
            data = DataManager.Instance.dataMonster.DataGet(character.NAME);

            rateHitMotion = data.hitMotionSkip;

            knockBack = data.knockBack;

            chaseTime = data.behaviorTime;
            RATE_CHASE = data.behaviorChase;
            RATE_ESCAPE = data.behaviorEscape;
            RATE_IDLE = data.behaviorIdle;
        }

        layerEnemy = LayerMask.NameToLayer($"Hit{(character.iff == IFF.Our ? IFF.Enemy : IFF.Our)}");
        radarAttack.gameObject.layer = radarChase.gameObject.layer = layerEnemy;

        hitCheck.Initialized(character, layerEnemy, int.MaxValue, null);
        //hitCheck.Activetion(false, 0);
        hitCheck.Activetion(true, int.MaxValue);

        if (weapon != null)
        {
            weapon.Initialized(character, layerEnemy, int.MaxValue, null);
            weapon.Activetion(false, 0);
        }

        attackTarget = chaseTarget = null;
        radarChase.gameObject.SetActive(true);
        radarAttack.gameObject.SetActive(true);
    }
    /// <summary>
    /// AI 가 생성 되었을때 리스폰 위치로 이동시키기 위해 사용됩니다.
    /// NaviMeshAgent 사용시 Transform.position 으로는 이동시키면 캐릭터가 이상동작을함
    /// </summary>
    /// <param name="pos">이동 좌표</param>
    public void OnWarp(Vector3 pos)
    {
        agent.Warp(pos);
    }

    [Header("모션")]
    public Motion motion;
    /// <summary>
    /// 공격 방향 또는 이동 방향 을 바라봅니다.
    /// </summary>
    void Look()
    {
        if (dirFire.x != 0 || dirMove.x != 0)
        {
            float x = dirFire.x != 0 ? -dirFire.x : -dirMove.x;
            motion.LookSet(x < 0 ? -1 : 1);
        }
    }
    [Header("히트모션을 무시할 확률")]
    public int rateHitMotion = 300;
    /// <summary>
    /// 데미지를 입었으며 히트모션을 실행합니다.
    /// </summary>
    /// <param name="attacker">공격자</param>
    /// <param name="dir">공격 방향</param>
    /// <param name="knockBackAddRate">넉백 추가 비율</param>
    public void OnHit(Character attacker, Vector3 dir, float knockBackAddRate, bool MOTION_FORCE, System.Action OnEnd)
    {
        if (attacker != null && attacker.iff != character.iff)
            chaseTarget = attacker.transform;

        if (chaseTarget != null)
            motion.LookSet((transform.position - chaseTarget.position).normalized.x < 0 ? -1 : 1);

        agent.velocity = Vector3.zero;
        KnockBack(dir, knockBackAddRate);

        if (!MOTION_FORCE && (motion.Check_ATK() || motion.Check_Appear() || motion.isSkill || Random.Range(0, 1000) < rateHitMotion))//모션을 실행하지 않는 경우
        {
            OnEnd();
        }
        else
        {
            AgentEnabled(true);//히트 모션 시작, 행동 정지
            motion.Play(Motion.Type.Hit, false, () =>
            {
                agent.velocity = Vector3.zero;
                AgentEnabled(false);//히트 모션 종료, 행동 시작

                if (attacker != null)
                {
                    if (!character.STUN && attacker.iff == IFF.Our)
                        TargetSet(attacker.transform.position, ref dirMove, true);//히트 모션 종료
                }

                OnEnd();
            });
        }
    }
    public GameObject prefabEffDeath;
    public SoundPlayer spDie;
    /// <summary>
    /// HP 가 0 이 되었으며 죽는 모션을 실행합니다.
    /// </summary>
    /// <param name="attacker">공격자</param>
    /// <param name="dir">공격 방향</param>
    public void OnDie(Character attacker, Vector3 dir)
    {
        CancelInvoke();

        hitCheck.gameObject.SetActive(false);

        AgentEnabled(true);//죽었을 경우, 행동 정지

        motion.Play(Motion.Type.Die, true, () =>
        {
            if (prefabEffDeath != null)
                character.map.ObjectCreate(prefabEffDeath, null, Vector3.one, transform.position);
            if (spDie != null)
                SoundManager.Instance.EffectPlay(spDie.gameObject);
            character.Hide_Start();
        });
    }
    public void OnResurrection(Character character)
    {
        InvokeRepeating("BehaviorChase", Random.Range(0, chaseTime), chaseTime);
    }

    [Space(5)]
    public float knockBack = 0.5f;//기본 넉백값
    /// <summary>
    /// 캐릭터를 넉백시킵니다.
    /// </summary>
    /// <param name="dir">넉백 방향</param>
    /// <param name="knockBackAddRate">추가 넉백 비율</param>
    void KnockBack(Vector3 dir, float knockBackAddRate)
    {
        dir.y = 0;
        agent.velocity = dir * (knockBack * knockBackAddRate);
    }

    [Space(5)]
    public bool LOCK_UPDOWN = false;
    [Header("이동 패턴")]
    public Transform chaseTarget;
    Vector3 dirMove;
    [Range(0.1f, 10f)]
    public float chaseTime = 1f;
    public float radiusBehavior = 10f;
    [Space(5)]
    public int RATE_CHASE = 500;
    public int RATE_ESCAPE = 500;
    public int RATE_IDLE = 500;
    int RATE_TOTAL;
    Vector3 posMove = Vector3.zero;
    /// <summary>
    /// AI 가 누군가를 추적할지 설정합니다.
    /// </summary>
    void BehaviorChase()
    {
        if (!gameObject.activeInHierarchy)
        {
            CancelInvoke();
            return;
        }

        if (character.STUN || LOCK)
            return;

        if (chaseTarget != null && !chaseTarget.gameObject.activeInHierarchy)//추적대상 상실
            chaseTarget = null;
        if (attackTarget != null && !attackTarget.gameObject.activeInHierarchy)//공격대상 상실
        {
            attackTarget = null;
            targetMelee = targetRange = null;
        }

        if (BehaviorAttack())
            ;//공격 대상이 주위에 있고 공격함
        else
        {
            if(chaseTarget == null && attackTarget == null)//대상이 없을때
            {
                RATE_TOTAL = RATE_ESCAPE + RATE_IDLE + 1;
                if (Random.Range(0, RATE_TOTAL) < RATE_ESCAPE)
                {
                    TargetSet(Vector3.zero, ref dirMove, false);//배회
                    return;
                }
            }
            else
            {
                if (attackTarget != null)
                {
                    RATE_TOTAL = RATE_ESCAPE + RATE_IDLE + 1;

                    if (Random.Range(0, RATE_TOTAL) < RATE_ESCAPE)
                    {
                        TargetSet(Vector3.zero, ref dirMove, false);//탈주
                        return;
                    }
                }
                else
                {
                    RATE_TOTAL = RATE_CHASE + RATE_ESCAPE + RATE_IDLE + 1;
                    int RATE = Random.Range(0, RATE_TOTAL);

                    if (RATE < RATE_CHASE)
                    {
                        Vector3 posMove = chaseTarget.position;
                        if (LOCK_UPDOWN)
                            posMove.x = 0;

                        TargetSet(posMove, ref dirMove, true);//추적
                        return;
                    }
                    else if (RATE < RATE_CHASE + RATE_ESCAPE)
                    {
                        TargetSet(Vector3.zero, ref dirMove, false);//탈주
                        return;
                    }
                }
            }

            MoveStop(true);//대기
        }
    }
    private void FixedUpdate()
    {
        //if (isMove && (agent.velocity.sqrMagnitude < 0.04f && agent.remainingDistance < 0.5f))
        if (isMove && (agent.enabled && agent.remainingDistance < 0.5f))
            MoveStop(true);//목표 지점 도착
    }
    public void OnMoveSpeedChanged(float spd)
    {
        agent.speed = character.CalculateMoveSpeed();
    }

    List<SkillData> skillsTriggerRun;
    EventManager.ObjectCreate objectCreate = new EventManager.ObjectCreate();
    /// <summary>
    /// AI 가 이동을 시작합니다.
    /// </summary>
    /// <param name="position">타겟의 좌표</param>
    /// <param name="dir">이동 방향</param>
    /// <param name="CHASE">true = 추적, false = 탈주, 대기</param>
    public void TargetSet(Vector3 position, ref Vector3 dir, bool CHASE = false)
    {
        if (isMove && !CHASE)
            return;

        if (!agent.enabled)
            agent.enabled = true;

        position = CHASE ? position : Util.PointCreate(transform.position, radiusBehavior);//이동좌표 설정

        agent.SetDestination(position);
        agent.isStopped = false;//이동 시작

        dir = (position - transform.position);
        Look();

        if (spWalk != null)
        {
            motion.Play(Motion.Type.Run, false, null, data =>
            {
                SoundManager.Instance.EffectPlay(spWalk.gameObject);//보스, 중보스 의 경우 이벤트가 걸려있을수 있음
                if (SHAKE)
                    character.map.tiltCamera.Shaking(0.1f, 0.1f);
            });
        }
        else if((skillsTriggerRun = skill.SkillList_Trigger("Run")) != null)
        {
            motion.Play(Motion.Type.Run, false, null, data =>
            {
                for (int i = 0; i < skillsTriggerRun.Count; i++)
                {
                    if (skillsTriggerRun[i].Activate("Run"))
                    {
                        switch (skillsTriggerRun[i].work)
                        {
                            case "CreatePoison":
                                {
                                    float damage = character.HP * skillsTriggerRun[i].value;
                                    character.Damage_Apply((int)damage, null, Vector3.zero, 0, true, null);

                                    objectCreate.prefab = PrefabManager.Instance.PrefabGet($"Effect/StatusEffect Poison Activate");
                                    objectCreate.target = transform;
                                    objectCreate.scale = Vector3.one;
                                    objectCreate.pos = Vector3.zero;
                                    EventManager.Instance.Invoke("PrefabCreateLocal", objectCreate);

                                    objectCreate.create.transform.SetParent(null);
                                    objectCreate.create.transform.eulerAngles = Vector3.zero;
                                    Vector3 pos = objectCreate.create.transform.position;
                                    pos.y = 1;
                                    objectCreate.create.transform.position = pos;

                                    HitCheck hit = objectCreate.create.GetComponent<HitCheck>();
                                    hit.damageType = DamageType.RateHP;
                                    hit.damageValue = skillsTriggerRun[i].value;
                                    hit.Initialized(character, LayerMask.NameToLayer($"Hit{(character.iff == IFF.Our ? IFF.Enemy : IFF.Our)}"), 9999, null);
                                }
                                break;
                        }
                    }
                }
            });
        }
        else
        {
            motion.Play(Motion.Type.Run);
        }

        agent.speed = character.CalculateMoveSpeed();
        isMove = true;
    }
    /// <summary>
    /// 추적 레이더(Rader.cs) 에 적 캐릭터가 탐지 되어 이를 실행합니다.
    /// </summary>
    /// <param name="target">추적대상</param>
    /// <param name="ENTER">true = 감지, false = 소실</param>
    public void TargetChase(Transform target, bool ENTER)
    {
        if (ENTER)
        {
            chaseTarget = target;

            if (!character.STUN || !LOCK)
            {
                MoveStop(false);
                BehaviorChase();
            }
        }
        else
            chaseTarget = chaseTarget == target ? null : chaseTarget;
    }

    [Header("공격 패턴")]
    public Transform attackTarget;
    public HitCheck weapon;
    public Fire fire;
    float timeAtk_Last = 0;
    Vector3 dirFire;
    Transform targetMelee;
    /// <summary>
    /// 레이더-근거리공격(Rader.cs)
    /// 공격 범위 내에 캐릭터가 감지되어 이를 실행합니다.
    /// </summary>
    /// <param name="target">공격대상</param>
    /// <param name="ENTER">true = 감지, false = 소실</param>
    public void Target_Melee(Transform target, bool ENTER)
    {
        if (ENTER)
        {
            targetMelee = attackTarget = target;

            if (!character.STUN || !LOCK)
                BehaviorAttack();//근거리
        }
        else
        {
            targetMelee = attackTarget = attackTarget == target ? null : attackTarget;
        }
    }
    Transform targetRange;
    /// <summary>
    /// 레이더-원거리공격(Rader.cs)
    /// 공격 범위 내에 캐릭터가 감지되어 이를 실행합니다.
    /// </summary>
    /// <param name="target">공격대상</param>
    /// <param name="ENTER">true = 감지, false = 소실</param>
    public void Target_Range(Transform target, bool ENTER)
    {
        if (ENTER)
        {
            targetRange = attackTarget = target;

            if (!character.STUN || !LOCK)
                BehaviorAttack();//원거리
        }
        else
        {
            targetRange = attackTarget = attackTarget == target ? null : attackTarget;
        }
    }
    /// <summary>
    /// AI 가 공격을 실행합니다.
    /// </summary>
    /// <returns></returns>
    bool BehaviorAttack()
    {
        if (attackTarget == null)
            return false;

        bool SKILL = skill.Active("Attack", attackTarget, active =>
        {
            MoveStop(true);
            AgentEnabled(false);//스킬 발동이 종료됐을 경우, 행동 시작

            motion.isSkill = false;
        });
        if (SKILL)
        {
            AgentEnabled(true);//스킬 발동이 시작됐을 경우, 행동 정지
            motion.isSkill = true;

            return SKILL;
        }

        if (!SKILL && attackTarget != null)
        {
            if (character.CalculateAttackDelay() < Time.realtimeSinceStartup - timeAtk_Last)
            {
                if (weapon != null && targetMelee != null)
                {
                    dirMove = (attackTarget.position - transform.position).normalized;
                    Look();//근거리공격 대상을 바라봄

                    AgentEnabled(true);//근거리, 공격 모션 시작, 행동 종료

                    //motion.typeBefore = Motion.Type.Attack;
                    motion.Play(Motion.Type.Attack, false, () =>
                    {
                        timeAtk_Last = Time.realtimeSinceStartup;

                        weapon.Activetion(false, 0);
                        AgentEnabled(false);//근거리, 공격 모션 종료, 행동 시작

                        MoveStop(true);
                    }, Attack_Event);

                    return true;
                }

                if (fire != null && targetRange != null)
                {
                    dirFire = attackTarget == null ? dirMove : (attackTarget.position - transform.position).normalized;
                    if (LOCK_UPDOWN)
                    {
                        dirFire.x = dirFire.x < 0 ? -1 : 1;
                        dirFire.z = 0;
                        dirFire.y = 0;
                    }
                    Look();//원거리공격 대상을 바라봄

                    AgentEnabled(true);//원거리, 공격 모션 시작, 행동 정지

                    Vector3 dir = dirFire;
                    //motion.typeBefore = Motion.Type.Attack;
                    motion.Play(Motion.Type.Attack, false, () =>
                    {
                        timeAtk_Last = Time.realtimeSinceStartup;

                        dirFire = Vector3.zero;
                        AgentEnabled(false);//원거리, 공격 모션 종료, 행동 시작

                        MoveStop(true);
                    }, data =>
                    {
                        fire.OnFire(dir);
                    });

                    return true;
                }
            }
        }

        return false;
    }
    /// <summary>
    /// 공격 모션 종료, 무기 콜리더 비활성화
    /// </summary>
    void Attack_End()
    {
        timeAtk_Last = Time.realtimeSinceStartup;

        weapon.Activetion(false, 0);
        AgentEnabled(false);//근거리, 공격 모션 종료, 행동 시작
    }
    [Space(10)]
    public bool SHAKE = false;
    public SoundPlayer spSmash;
    public SoundPlayer spWalk;
    TiltCamera tiltCamera;
    /// <summary>
    /// 공격 모션의 이벤트가 발생하여 이를 처리합니다.
    /// </summary>
    /// <param name="data"></param>
    void Attack_Event(Spine.Event data)
    {
        switch (data.Data.Name)
        {
            case "On":
                {
                    weapon.Activetion(true, 1);//무기의 콜리더 활성화
                }
                break;
            case "Off":
                {
                    if (SHAKE)
                    {
                        if (spSmash != null)
                            SoundManager.Instance.EffectPlay(spSmash.gameObject);
                        character.map.tiltCamera.Shaking(0.25f, 0.25f);
                    }

                    weapon.Activetion(false, 0);//무기의 콜리더 비활성화
                }
                break;
        }
    }

    [Header("스킬 패턴")]
    public Skill skill;
    /// <summary>
    /// 레이더-방어(Rader.cs)
    /// 공격 범위 내에 적의 투사체 혹은 무기가 감지되어 이를 처리합니다.
    /// </summary>
    /// <param name="target"></param>
    /// <param name="ENTER"></param>
    public void OnDefense(Transform target, bool ENTER)
    {
        if (character.STUN || LOCK || !ENTER)
            return;

        //스킬 Trigger:Defense 가 있는지 확인
        bool SKILL = skill.Active("Defense", null, active =>
        {
            MoveStop(true);
            AgentEnabled(false);//스킬:Defense 상태 발동이 종료됐을 경우, 행동 시작

            motion.isSkill = false;
        });
        if (SKILL)
        {
            Vector3 dir = (transform.position - target.position).normalized;
            motion.LookSet(dir.x < 0 ? -1 : 1);

            AgentEnabled(true);//스킬:Defense 상태 발동이 시작됐을 경우, 행동 정지

            motion.isSkill = true;
        }
    }
}