using System;
using System.Collections;
using BehaviorDesigner.Runtime;
using Sirenix.OdinInspector;
using UnityEngine;
using UnityEngine.AI;

// ReSharper disable once CheckNamespace
namespace BlueWaterProject
{
    public abstract class Enemy : BaseCharacter, IDamageable, IAiView, IHelpCall
    {
        #region Properties and variables

        [Title("DrawGizmos")]
        [Tooltip("전체 Gizmos 그리기 여부")]
        [SerializeField] private bool isDrawGizmos = true;
        
        [ShowIf("@isDrawGizmos")]
        [Tooltip("타겟 인식 범위 그리기 여부")]
        [SerializeField] private bool isDrawViewRange = true;
        
        [ShowIf("@isDrawGizmos")]
        [Tooltip("이동제한 범위 그리기 여부")]
        [SerializeField] private bool isDrawDefenseRange = true;
        
        [ShowIf("@isDrawGizmos")]
        [Tooltip("Idle 상태에서 랜덤으로 이동하는 범위 그리기 여부")]
        [SerializeField] private bool isDrawRandomMoveRange = true;
        
        [ShowIf("@isDrawGizmos")]
        [Tooltip("타겟과의 상태 그리기 여부\n빨간색 = 공격 범위 밖\n파란색 = 공격 범위 안")]
        [SerializeField] private bool isDrawTargetRange = true;

        [field: Title("Stat")]
        [field: Tooltip("행동 타입 설정")]
        [field: SerializeField] public EBehaviorType BehaviorType { get; private set; } = EBehaviorType.DEFENDER;
        
        [field: Tooltip("최대 체력 설정")]
        [field: SerializeField] public float MaxHp { get; private set; } = 100f;
        
        [field: Tooltip("현재 체력")]
        [field: SerializeField] public float CurrentHp { get; private set; }
        
        [field: Tooltip("이동 속도 설정")]
        [field: SerializeField] public float MoveSpd { get; private set; } = 5f;
        
        [field: Tooltip("공격력 설정")]
        [field: SerializeField] public float Atk { get; private set; } = 10f;
        
        [field: Tooltip("공격 속도(다음 공격 주기)\nAtkCooldown = 2f (2초마다 1번 공격)")]
        [field: SerializeField] public float AtkCooldown { get; private set; } = 1f;
        
        [field: Tooltip("공격 사거리 설정")]
        [field: SerializeField] public float AtkRange { get; private set; } = 1.5f;
        
        [field: ShowIf("@BehaviorType == EBehaviorType.DEFENDER || BehaviorType == EBehaviorType.KEEPER")]
        [field: Tooltip("이동 제한 범위 설정")]
        [field: SerializeField] public float DefenseRange { get; private set; } = 20f;
        
        [field: Tooltip("Idle 상태에서 랜덤으로 이동 여부")]
        [field: SerializeField] public bool IsRandomMove { get; private set; } = true;
        
        [field: ShowIf("@IsRandomMove")]
        [field: Tooltip("Idle 상태에서 이동하는 범위 설정")]
        [field: SerializeField] public float RandomMoveRange { get; private set; } = 5f;

        [field: Title("Data")]
        [field: DisableIf("@true")]
        [field: SerializeField] public Vector3 DefensePos { get; set; }
        [field: DisableIf("@true")]
        [field: SerializeField] public bool IsCombated { get; set; }
        
        [field: DisableIf("@true")]
        [field: SerializeField] public bool BeAttackedInIdle { get; set; }
        
        [DisableIf("@true")]
        [SerializeField] private bool beAttacked;

        protected bool isAttacking;
        
        // Component
        protected Rigidbody rb;
        public Collider MyCollider { get; private set; }
        public NavMeshAgent Agent { get; private set; }
        protected BehaviorTree bt;
        protected Animator myAnimator;
        
        // Hash
        protected static readonly int RunStateHash = Animator.StringToHash("RunState");
        
        // Const
        private static readonly WaitForSeconds BeAttackedWaitTime = new(0.3f);

        #endregion

        #region Unity built-in methods
        
        protected override void OnDrawGizmosSelected()
        {
            base.OnDrawGizmosSelected();
            
            if (!isDrawGizmos) return;

            Vector3 myCenterPos;
            Vector3 defensePos;
            if (Application.isPlaying)
            {
                myCenterPos = MyCollider.bounds.center;
                defensePos = DefensePos;
            }
            else
            {
                myCenterPos = GetComponent<Collider>().bounds.center;
                defensePos = transform.position;
            }

            switch (BehaviorType)
            {
                case EBehaviorType.NONE:
                    break;
                case EBehaviorType.STRIKER:
                    break;
                case EBehaviorType.DEFENDER:
                case EBehaviorType.KEEPER:
                    if (isDrawDefenseRange)
                    {
                        Gizmos.color = Color.blue;
                        Gizmos.DrawWireSphere(defensePos, DefenseRange);
                    }
                    break;
                default:
                    throw new ArgumentOutOfRangeException();
            }

            if (isDrawRandomMoveRange)
            {
                Gizmos.color = Color.green;
                Gizmos.DrawWireSphere(defensePos, RandomMoveRange);
            }

            if (isDrawViewRange)
            {
                Gizmos.color = Color.red;
                Gizmos.DrawWireSphere(myCenterPos, ViewRadius);
            }

            if (UseHelpCall && IsDrawHelpCallRange)
            {
                Gizmos.color = Color.magenta;
                Gizmos.DrawWireSphere(myCenterPos, HelpCallRange);
            }
            
            if (!Target || !isDrawTargetRange) return;

            var targetToDistance = Vector3.Distance(myCenterPos, Target.bounds.center);
            Gizmos.color = targetToDistance <= AtkRange ? Color.blue : Color.red;
            Gizmos.DrawLine(myCenterPos, Target.bounds.center);
        }

        protected override void Reset()
        {
            base.Reset();

            isDrawGizmos = true;
            isDrawViewRange = true;
            isDrawDefenseRange = true;
            isDrawRandomMoveRange = true;
            isDrawTargetRange = true;

            BehaviorType = EBehaviorType.DEFENDER;
            MaxHp = 100f;
            MoveSpd = 5f;
            AtkCooldown = 1f;
            AtkRange = 1.5f;
            DefenseRange = 20f;
            IsRandomMove = true;
            RandomMoveRange = 5f;
            ViewRadius = 15f;
            UseHelpCall = false;
            HelpLayer = LayerMask.GetMask("Enemy");
            HelpCallRange = 15f;
        }

        protected override void Awake()
        {
            base.Awake();
            
            rb = GetComponent<Rigidbody>();
            MyCollider = GetComponent<Collider>();
            Agent = GetComponent<NavMeshAgent>();
            bt = GetComponent<BehaviorTree>();
            
            myAnimator = transform.Find("UnitRoot")?.GetComponent<Animator>();
            if (myAnimator == null)
            {
                print("UnitRoot오브젝트를 찾을 수 없거나, Animator컴포넌트가 존재하지 않습니다.");
            }
        }

        protected override void Start()
        {
            base.Start();
            
            HelpLayer = LayerMask.GetMask("Enemy");
            TargetLayer = LayerMask.GetMask("Player");

            Agent.updateRotation = false;
            DefensePos = transform.position;
            SetAgentSpeed(ESpeedType.DEFAULT);
            SetCurrentHp(MaxHp);
        }

        #endregion
        
        #region Interface

        // IDamageable
        public virtual void TakeDamage(float attackerPower, float attackerShieldPenetrationRate = default, Vector3? attackPos = null)
        {
            IsCombated = true;
            
            if (!Target)
            {
                BeAttackedInIdle = true;
                bt.SendEvent("BeAttackedInIdle", attackPos);
            }
            else
            {
                if (UseHelpCall)
                {
                    HelpCall();
                }
            }
            
            var changeHp = Mathf.Max(CurrentHp - attackerPower, 0);
            SetCurrentHp(changeHp);
            
            // 죽었는지 체크
            if (changeHp == 0f)
            {
                return;
            }

            StartCoroutine(nameof(BeAttacked));
        }

        // IAiView
        [field: Title("IAiView")]
        [field: SerializeField]
        public float ViewRadius { get; set; } = 15f;
        [field: SerializeField] public Collider[] Targets { get; set; } = new Collider[MAX_COLLIDERS];
        [field: SerializeField] public Collider Target { get; set; }
        [field: SerializeField] public LayerMask TargetLayer { get; set; }

        private const int MAX_COLLIDERS = 30;

        public void FindNearestTargetInRange(bool targetIsTrigger = true)
        {
            Array.Clear(Targets, 0, MAX_COLLIDERS);

            var myCenterPos = MyCollider.bounds.center;
            var numResults = Physics.OverlapSphereNonAlloc(myCenterPos, ViewRadius, Targets, TargetLayer,
                targetIsTrigger ? QueryTriggerInteraction.Collide : QueryTriggerInteraction.Ignore);

            if (numResults <= 0)
            {
                SetTarget(null);
                return;
            }

            var nearestDistance = ViewRadius * ViewRadius;
            Collider nearestTargetCollider = null;

            for (var i = 0; i < numResults; i++)
            {
                var distanceSqrToTarget = (myCenterPos - Targets[i].bounds.center).sqrMagnitude;

                if (distanceSqrToTarget >= nearestDistance) continue;

                nearestDistance = distanceSqrToTarget;
                nearestTargetCollider = Targets[i];
            }

            SetTarget(nearestTargetCollider);
        }
        
        // IHelpCall
        [field: Title("IHelpCall")]
        [field: Tooltip("주변 아군에게 도움 요청")]
        [field: SerializeField] public bool UseHelpCall { get; set; }

        [field: ShowIf("@UseHelpCall && isDrawGizmos")]
        [field: Tooltip("도움 요청 범위 그리기 여부")]
        [field: SerializeField] public bool IsDrawHelpCallRange { get; set; }
        
        [field: ShowIf("@UseHelpCall")]
        [field: Tooltip("도움 요청 범위 설정")]
        [field: SerializeField] public LayerMask HelpLayer { get; set; }
        
        [field: ShowIf("@UseHelpCall")]
        [field: Tooltip("도움 요청 범위 설정")]
        [field: SerializeField] public float HelpCallRange { get; set; } = 15f;

        [field: ShowIf("@UseHelpCall")]
        [field: Tooltip("도움 요청 받은 아군 목록")]
        [field: SerializeField] public Collider[] HelpTargets { get; set; } = new Collider[MAX_COLLIDERS];

        #endregion

        #region Custom methods
        
        private IEnumerator BeAttacked()
        {
            beAttacked = true;
            myAnimator.SetFloat(RunStateHash, 1f);
            yield return BeAttackedWaitTime;

            beAttacked = false;
        }
        
        public bool IsTargetWithinRange()
        {
            var attackInRange = Vector3.Distance(MyCollider.bounds.center, Target.bounds.center) <= AtkRange;
            return attackInRange;
        }
        
        public bool GoOutOfBounds()
        {
            if (BehaviorType != EBehaviorType.DEFENDER && BehaviorType != EBehaviorType.KEEPER) return false;
            
            var defensePosInRange = Vector3.Distance(transform.position, DefensePos) <= DefenseRange;
            return !defensePosInRange;
        }
        
        public void MoveTarget(Vector3 targetPos, ESpeedType speedType, float stopDistance)
        {
            switch (BehaviorType)
            {
                case EBehaviorType.NONE:
                    print("BehaviorType == NONE error");
                    break;
                case EBehaviorType.STRIKER:
                case EBehaviorType.DEFENDER:
                    break;
                case EBehaviorType.KEEPER:
                    return;
                default:
                    throw new ArgumentOutOfRangeException();
            }

            if (Vector3.Distance(Agent.destination, targetPos) < 0.1f) return;
            
            SetAgentSpeed(speedType);
            Agent.stoppingDistance = stopDistance;
            Agent.isStopped = false;
            Agent.SetDestination(targetPos);
        }

        public void HelpCall(bool targetIsTrigger = true)
        {
            Array.Clear(HelpTargets, 0, MAX_COLLIDERS);

            var myCenterPos = MyCollider.bounds.center;
            var numResults = Physics.OverlapSphereNonAlloc(myCenterPos, HelpCallRange, HelpTargets, HelpLayer,
                targetIsTrigger ? QueryTriggerInteraction.Collide : QueryTriggerInteraction.Ignore);

            for (var i = 0; i < numResults; i++)
            {
                var iHelpCall = HelpTargets[i].GetComponent<IHelpCall>();
                
                if (iHelpCall == null || iHelpCall.Target != null) continue;

                iHelpCall.SetTarget(Target);
            }
        }

        private void SetAgentSpeed(ESpeedType speedType)
        {
            switch (speedType)
            {
                case ESpeedType.NONE:
                    print("speedType == NONE error");
                    break;
                case ESpeedType.DEFAULT:
                    Agent.speed = MoveSpd;
                    break;
                case ESpeedType.SLOW:
                    Agent.speed = MoveSpd * 0.5f;
                    break;
                case ESpeedType.FAST:
                    Agent.speed = MoveSpd * 2f;
                    break;
                default:
                    throw new ArgumentOutOfRangeException(nameof(speedType), speedType, null);
            }
        }
        
        public void SetTarget(Collider value)
        {
            Target = value;

            if (value != null)
            {
                IsCombated = true;
                BeAttackedInIdle = false;
            }
        }

        private void SetCurrentHp(float value) => CurrentHp = value;

        #endregion
    }
}