using System;
using UnityEngine;
using UnityEngine.AI;
using UnityEngine.Animations;

// ReSharper disable once CheckNamespace
namespace BlueWaterProject
{
    public abstract class CombatAi : HumanAi
    {
        #region Properties and variables
        
        // 일반 변수
        protected LayerMask targetLayer;
        protected Vector3 defensePos;
        
        // 컴포넌트 관련 변수
        protected Animator humanAnimator;
        protected NavMeshAgent humanAgent;
        protected CapsuleCollider myCollider;
        protected CapsuleCollider hitBoxCollider;
        protected LookAtConstraint lookAtConstraint;
        
        // 애니메이션 관련 변수
        protected static readonly int SpeedHash = Animator.StringToHash("Speed");
        protected static readonly int AttackHash = Animator.StringToHash("Attack");
        protected static readonly int DamageHash = Animator.StringToHash("TakeDamage");
        protected static readonly int DeathTypeHash = Animator.StringToHash("DeathType");
        protected static readonly int DeathHash = Animator.StringToHash("Death");
        protected static readonly int ShieldHash = Animator.StringToHash("Shield");
        protected static readonly int OutlineColorHash = Shader.PropertyToID("_OutlineColor");
        
        #endregion

        #region Abstract methods

        protected abstract void SetLayer();

        protected abstract void SetCurrentHp(float value);

        #endregion

        #region Unity built-in methods

        protected override void Awake()
        {
            base.InitComponent();
            
            FlagLookAtCamera();
            SetLayer();
        }

        #endregion

        #region Custom methods

        protected override void InitComponent()
        {
            base.InitComponent();
            
            humanAnimator = Utils.GetComponentAndAssert<Animator>(transform);
            humanAgent = Utils.GetComponentAndAssert<NavMeshAgent>(transform);
            myCollider = Utils.GetComponentAndAssert<CapsuleCollider>(transform);
            hitBoxCollider = Utils.GetComponentAndAssert<CapsuleCollider>(transform.Find("HitBox"));
            lookAtConstraint = Utils.GetComponentAndAssert<LookAtConstraint>(flagContainer);
        }

        private void FlagLookAtCamera()
        {
            if (Camera.main != null)
            {
                var source = new ConstraintSource
                {
                    sourceTransform = Camera.main.transform,
                    weight = 1f
                };
                lookAtConstraint.AddSource(source);
            }

            lookAtConstraint.constraintActive = true;
        }

        protected void SetMoveSpeed(float value) => humanAgent.speed = value;

        #endregion
    }
}