using System;
using System.Collections;
using System.Collections.Generic;
using Beyond;
using Invector.vCharacterController.AI;
using Invector.vCharacterController.AI.FSMBehaviour;
using UnityEngine;

namespace Invector.vMelee
{
    using vEventSystems;

    public class bMeleeAttackControl : StateMachineBehaviour
    {
        [Tooltip("normalizedTime of Active Damage")]
        public float startDamage = 0.05f;

        [Tooltip("normalizedTime of Disable Damage")]
        public float endDamage = 0.9f;

        public int damageMultiplier;
        public int recoilID;
        public int reactionID;

        public vAttackType meleeAttackType = vAttackType.Unarmed;

        [Tooltip("You can use a name as reference to trigger a custom HitDamageParticle")]
        public string damageType;

        [HideInInspector] [Header("This work with vMeleeManager to active vMeleeAttackObject from bodyPart and id")]
        public List<string> bodyParts = new List<string> { "RightLowerArm" };

        public bool ignoreDefense;
        public bool activeRagdoll;

        [vHideInInspector("activeRagdoll"), Tooltip("Time to keep Ragdoll active")]
        public float senselessTime;

        [Tooltip("Check true in the last attack of your combo to reset the triggers")]
        public bool resetAttackTrigger;

        private bool isActive;
        public bool debug;
        private vIAttackListener mFighter;
        private bool isAttacking;
        //private bool slowMoActive = false;
        public bool useAttackTimeScale = false;
        public float resetTriggerBeforeTime = 0.5f;
        public float attackTimeScale = 0.2f;
        public float attackTimeScaleStart = -1f;
        public float attackTimeScaleEnd = -1f;
        public float maxTargetDistance = 3f;
        public float maxTurnTowardDistance = 6f;
        public float lowHealthTh = 10f;
        private bool m_hasScaledTime = false;
        
        
        public float degreeThreshold = 20;
        public bool rotatePlayerTowardsTarget;
        private bool m_isRotating;
        public float rotationSpeed = 30f;

        override public void OnStateEnter(Animator animator, AnimatorStateInfo stateInfo, int layerIndex)
        {
            mFighter = animator.GetComponent<vIAttackListener>();
            isAttacking = true;
            //slowMoActive = false;
            if (mFighter != null)
                mFighter.OnEnableAttack();

            if (debug)
                Debug.Log("Enter " + damageType);

            if (attackTimeScaleStart < 0f)
            {
                attackTimeScaleStart = startDamage;
            }

            if (attackTimeScaleEnd < 0f)
            {
                attackTimeScaleEnd = endDamage;
            }
        }

        private void LerpRotation()
        {
            if (!rotatePlayerTowardsTarget)
            {
                return;
            }

            float minDist = maxTurnTowardDistance;
            var enemy = GetNearestEnemy(ref minDist);

            if (!IsEnemyInAngleRange(enemy))
            {
                return;
            }

            Transform playerTransform = Player.Instance.transform;
            var toEnemy = enemy.transform.position - playerTransform.position;
            toEnemy.y = 0f;
            toEnemy.Normalize();
            
            Quaternion targetRot =
                Quaternion.LookRotation(toEnemy);

            var rotation = playerTransform.rotation;
            rotation = Quaternion.RotateTowards(rotation, targetRot, Time.deltaTime * rotationSpeed);
            //rotation = Quaternion.Lerp(rotation, targetRot, Time.deltaTime * rotationSpeed);
            playerTransform.rotation = rotation;
        }
        private bool IsEnemyInAngleRange(vFSMBehaviourController ai)
        {
            if (ai == null)
            {
                return false;
            }

            Vector3 playerFwd = Player.Instance.transform.forward;
            Vector3 target = (ai.transform.forward - playerFwd).normalized;

            float dot = Vector3.Dot(playerFwd, target );
            float angle = 180f - Mathf.Acos(dot) * Mathf.Rad2Deg;
            //Debug.Log("IsEnemyInAngleRange: angle: "+angle);

            if (angle > degreeThreshold)
            {
                return false;
            }

            return true;
        }

        public float NearTargertHealth()
        {
            float health = -1f;
            if (Player.Instance.LockOn.currentTarget != null)
            {
                var aic = Player.Instance.LockOn.currentTarget.GetComponent<vControlAICombat>();
                if (aic != null)
                {
                    health = aic.currentHealth;
                    return health;
                }
            }

            float minDist = Single.PositiveInfinity;

            var ctrl = GetNearestEnemy(ref minDist);

            if (minDist < maxTargetDistance)
            {
                health = ctrl.aiController.currentHealth;
            }

            return health;
        }

        private bool NearHealthLow()
        {
            float h = NearTargertHealth();
            return h > 0f && h < lowHealthTh;
        }

        private vFSMBehaviourController GetNearestEnemy(ref float minDist)
        {
            var controllers = GameStateManager.Instance.GetActiveCombatcontrollers();
            Vector3 playerPos = Player.Instance.transform.position;
            vFSMBehaviourController ctrl = null;
            foreach (var aic in controllers)
            {
                var dist2 = aic.transform.position - Player.Instance.transform.position;
                dist2.y = 0f;
                if (dist2.magnitude < minDist)
                {
                    ctrl = aic;
                    minDist = dist2.magnitude;
                }
            }

            return ctrl;
        }

        public bool TargetNear()
        {
            var targets = Player.Instance.LockOn.GetNearbyTargets();
            if (targets.Count == 0)
                return false;
            else
            {
                var dist2 = targets[0].position - Player.Instance.transform.position;
                dist2.y = 0f;
                return dist2.magnitude < maxTargetDistance;
            }
        }

        private void UpdateSlowMo(float normalizedTime)
        {
            if (!m_hasScaledTime)
            {
                if (normalizedTime >= attackTimeScaleStart && normalizedTime <= attackTimeScaleEnd)
                {
                    if (TargetNear() && (useAttackTimeScale || NearHealthLow()))
                    {
                        TimeController.Instance.SetTimeScaleForSec(attackTimeScale, attackTimeScaleEnd - normalizedTime, true);
                        //Time.timeScale = attackTimeScale;
                        m_hasScaledTime = true;
                    }
                }
            } else if (normalizedTime > attackTimeScaleEnd)
            {
                m_hasScaledTime = false;
            }
        }
        
        override public void OnStateUpdate(Animator animator, AnimatorStateInfo stateInfo, int layerIndex)
        {
            if (Player.Instance.ActiveWeaponTrail)
            {
                Player.Instance.ActiveWeaponTrail.m_colorMultiplier = Color.white +Color.red * damageMultiplier;
            }
            
            float nTime = stateInfo.normalizedTime % 1;

            LerpRotation();

            if (nTime >= startDamage && nTime <= endDamage && !isActive)
            {
                if (debug)
                    Debug.Log(animator.name + " attack " + damageType + " enable damage in " +
                              System.Math.Round(stateInfo.normalizedTime % 1, 2));
                isActive = true;
                ActiveDamage(animator, true);
                /*
                if (TargetNear() && (useAttackTimeScale || NearHealthLow()))
                {
                    TimeController.Instance.SetTimeScaleForSec(attackTimeScale, endDamage - nTime);
                    //Time.timeScale = attackTimeScale;
                    m_hasScaledTime = true;
                }
                */
            }
            else if (nTime > endDamage && isActive)
            {
                if (debug)
                    Debug.Log(animator.name + " attack " + damageType + " disable damage in " +
                              System.Math.Round(stateInfo.normalizedTime % 1, 2));
                isActive = false;
                ActiveDamage(animator, false);
                if (m_hasScaledTime)
                {
                    //Time.timeScale = 1f;
                    m_hasScaledTime = false;
                }
            }

            if (nTime > endDamage && isAttacking)
            {
                isAttacking = false;
                if (mFighter != null)
                    mFighter.OnDisableAttack();
            }

            if (nTime > .1f && nTime < resetTriggerBeforeTime && isAttacking)
            {
                if (mFighter != null)
                    mFighter.ResetAttackTriggers();
            }

            //if (stateInfo.normalizedTime % 1 > allowRotationAt && isAttacking)
            //{              
            //    isAttacking = false;
            //    if (mFighter != null)
            //        mFighter.OnDisableAttack();
            //}
            UpdateSlowMo(nTime);
        }

        override public void OnStateExit(Animator animator, AnimatorStateInfo stateInfo, int layerIndex)
        {
            if (debug)
                Debug.Log("Exit " + damageType);

            if (isActive)
            {
                isActive = false;
                ActiveDamage(animator, false);
            }

            if (isAttacking)
            {
                isAttacking = false;
                if (mFighter != null)
                    mFighter.OnDisableAttack();
            }

            if (mFighter != null && resetAttackTrigger)
                mFighter.ResetAttackTriggers();

            if (debug) Debug.Log(animator.name + " attack " + damageType + " stateExit");
        }

        void ActiveDamage(Animator animator, bool value)
        {
            var meleeManager = animator.GetComponent<vMeleeManager>();
            if (meleeManager)
                meleeManager.SetActiveAttack(bodyParts, meleeAttackType, value, damageMultiplier, recoilID, reactionID,
                    ignoreDefense, activeRagdoll, senselessTime, damageType);
        }
    }
}