using NUnit.Framework;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.AI;
using UnityStandardAssets.Characters.ThirdPerson;

public class StatueBehaviour : MonoBehaviour
{
    #region Visibility Variables
    [SerializeField] private float _viewRadius;
    [SerializeField] private float _viewAngle;

    public LayerMask playerMask;
    public LayerMask obstacleMask;
    #endregion

    public Animator statueAnimator;
    public NavMeshAgent statueAI;
    [SerializeField] ThirdPersonCharacter thirdPerson;
    [SerializeField] Transform _player;
    [SerializeField] public Transform _statue;
    //[SerializeField] private List<SkinnedMeshRenderer> _statueSkinnedMeshRenderer;

    [SerializeField] private float _stMovementSpeed;
    [SerializeField] float killRange = 0.5f; // Example kill range; adjust as necessary

    #region VariantsForPatrol
    [SerializeField] private List<Transform> patrolPoints;  // List of patrol points
    private int _currentPatrolIndex = 0;  // Current patrol point index
    private bool _canChangePoint = true;  // Flag to control when to move to the next point 
    private bool _forceToFreezeStatue;
    #endregion

    Coroutine waitBeforeChaseCoroutine;

    public StatueDetection statueDetection;

    public enum StatueState
    {
        Spawn,
        Patrol,
        Chase,
        Freeze,
        Kill
    }

    public StatueState state = StatueState.Spawn;

    private void Start()
    {
        statueAI = GetComponent<NavMeshAgent>();
        _player = PlayerManager.GetInstance().playerGameObj.transform;

        //statueDetection = _player.GetComponent<StatueDetection>();

        // Προσθήκη του αγάλματος στη λίστα του StatueDetection
        if (statueDetection != null)
        {
            if (!statueDetection.statues.Contains(this.transform))
            {
                statueDetection.statues.Add(this.transform);
            }
        }
    }

    void Update()
    {
        UpdateStatueBehaviour();
    }

    void UpdateStatueBehaviour()
    {
        UpdateStatueMovement(); // Update movement while patrolling
        #region Statue's animations handling
        float speed = statueAI.velocity.magnitude;
        // Map NavMeshAgent's speed to blend tree parameter
        float normalizedSpeed = speed / statueAI.speed; // Adjust the divisor to match your maximum NavMeshAgent speed
        statueAnimator.SetFloat("speedPercent", normalizedSpeed);
        #endregion

        switch (state)
        {
            case StatueState.Spawn:
                if (!statueAI.isActiveAndEnabled)
                {
                    this.gameObject.SetActive(true);
                }
                else
                {
                    state = StatueState.Patrol;
                }
                break;
            case StatueState.Patrol:

                Patrol(patrolPoints);

                if (statueAI.remainingDistance > statueAI.stoppingDistance)
                {
                    UpdateStatueMovement(); // Update movement while patrolling
                }

                if (CanSeePlayer())
                {
                    waitBeforeChaseCoroutine = StartCoroutine(WaitBeforeChase());  // Start the coroutine before chasing
                }

                break;
            case StatueState.Chase:
                CheckKillCondition();

                if (statueDetection != null && statueDetection.CheckStatuesInView())
                {
                    // Αν ο παίκτης κοιτάζει κάποιο άγαλμα (συμπεριλαμβανομένου αυτού)
                    state = StatueState.Freeze;
                    statueAI.isStopped = true; // Σταμάτημα κίνησης του αγάλματος
                    statueAnimator.SetBool("isFrozen", true); // Έναρξη animation παγώματος
                    if (waitBeforeChaseCoroutine != null)
                    {
                        StopCoroutine(waitBeforeChaseCoroutine);
                        waitBeforeChaseCoroutine = null;
                    }
                }
                else
                {
                    // Συνέχιση καταδίωξης
                    ChasePlayer();
                }
                break;
            case StatueState.Freeze:
                // Check if player has stopped looking
                if (_forceToFreezeStatue == false)
                {
                    if (statueDetection != null && !statueDetection.CheckStatuesInView())
                    {
                        state = StatueState.Chase; // Resume chase if player looks away
                    }
                }
                break;
            case StatueState.Kill:
                // Logic for killing the player (not implemented)
                break;
        }
    }

    public void ForceToFreezeStatue() 
    {
        _forceToFreezeStatue = true;
        // Αν ο παίκτης κοιτάζει κάποιο άγαλμα (συμπεριλαμβανομένου αυτού)
        state = StatueState.Freeze;
        statueAI.isStopped = true; // Σταμάτημα κίνησης του αγάλματος
        statueAI.SetDestination(transform.position);
        statueAnimator.SetBool("isFrozen", true); // Έναρξη animation παγώματος
        if (waitBeforeChaseCoroutine != null)
        {
            StopCoroutine(waitBeforeChaseCoroutine);
            waitBeforeChaseCoroutine = null;
        }
    }

    public void UnfreezeForcedFreezedStatue()
    {
        _forceToFreezeStatue = false;
    }

    void UpdateStatueMovement()
    {
        //If agent has not reached the desired destination :
        if (statueAI.remainingDistance > statueAI.stoppingDistance)
        {
            thirdPerson.Move(statueAI.desiredVelocity, false, false);
        }
        else // If agent has reached the desired destination :
        {
            thirdPerson.Move(Vector3.zero, false, false); //Agent stops moving.
        }
    }

    #region Field of view
    public Vector3 DirFromAngle(float angleInDegrees, bool angleIsGlobal) // This calculate the angle of the viewpoint
    {
        if (!angleIsGlobal)
        {
            angleInDegrees += transform.eulerAngles.y;
        }
        return new Vector3(Mathf.Sin(angleInDegrees * Mathf.Deg2Rad), 0, Mathf.Cos(angleInDegrees * Mathf.Deg2Rad));
    }

    // This method is checking if pplayer is inside the view angle and callculates is there isnt any obstacle between the player and Medea
    public bool CanSeePlayer()
    {
        Collider[] targetInViewRadius = Physics.OverlapSphere(transform.position, _viewRadius, playerMask);

        if (targetInViewRadius.Length > 0)
        {
            _player = targetInViewRadius[0].transform;
            Vector3 dirToTarget = (_player.position - transform.position).normalized;

            if (Vector3.Angle(transform.forward, dirToTarget) < _viewAngle / 2)
            {
                float distToTarget = Vector3.Distance(transform.position, _player.position);

                if (!Physics.Raycast(transform.position, dirToTarget, distToTarget, obstacleMask))
                {
                    return true;
                }
                else
                {
                    return false;
                }
            }
        }

        return false;

    }

    private void OnDrawGizmos()
    {
        #region GizmosForView
        Gizmos.color = Color.yellow;
        Gizmos.DrawWireSphere(transform.position, _viewRadius);
        Vector3 viewAngleA = DirFromAngle(-_viewAngle / 2, false);
        Vector3 viewAngleB = DirFromAngle(_viewAngle / 2, false);
        Gizmos.DrawLine(transform.position, transform.position + viewAngleA * _viewRadius);
        Gizmos.DrawLine(transform.position, transform.position + viewAngleB * _viewRadius);
        Gizmos.DrawLine(transform.position, _player.position);
        #endregion
    }
    #endregion

    #region PatrolBehaviour
    void Patrol(List<Transform> points)
    {
        if (_canChangePoint)
        {
            // Check if the statue has reached the current destination point
            if (!statueAI.pathPending && statueAI.remainingDistance < 0.25f)
            {
                // Trigger the "looking around" animation
                statueAnimator.SetBool("IsLookingAround", true);

                // Stop the agent movement while waiting
                statueAI.isStopped = true;

                // Move to the next patrol point
                statueAI.destination = points[_currentPatrolIndex].position;

                // Update the patrol index to the next point
                _currentPatrolIndex = (_currentPatrolIndex + 1) % points.Count;

                // Set a flag to wait before moving to the next point
                _canChangePoint = false;

                // Start coroutine to wait before moving again
                StartCoroutine(WaitForNextPatrolPoint());
            }
        }
    }

    // Coroutine to wait for a few seconds before moving to the next patrol point
    IEnumerator WaitForNextPatrolPoint()
    {
        yield return new WaitForSeconds(2f);  // Wait time can be adjusted
        statueAnimator.SetBool("IsLookingAround", false);  // Reset the animation
        statueAI.isStopped = false;  // Resume movement
        _canChangePoint = true;  // Allow changing to the next point
    }
    #endregion

    #region ChaseBehaviour
    void ChasePlayer()
    {
        statueAI.isStopped = false;
        statueAnimator.SetBool("IsLookingAround", false); // Stop patrol animation

        // Set destination to the player's position
        statueAI.SetDestination(_player.position);
    }
    #endregion

    #region WaitBeforeChase
    IEnumerator WaitBeforeChase()
    {
        state = StatueState.Freeze;  // Temporarily freeze before chasing
        statueAI.isStopped = true;   // Stop movement

        yield return new WaitForSeconds(2f);  // Wait for 2 seconds

        statueAI.isStopped = false;  // Resume movement
        state = StatueState.Chase;    // Switch to chase state
    } 
    #endregion

    #region Killing player

    private void CheckKillCondition()
    {
        //float killRange = 0.5f; // Example kill range; adjust as necessary
        float distanceToPlayer = Vector3.Distance(transform.position, _player.position);

        if (distanceToPlayer <= killRange)
        {
            KillPlayer(); // Call kill logic if within range
        }
    }

    private void KillPlayer()
    {
        // Disable the statue's AI to stop its behavior
        statueAI.enabled = false; // Disable the statue's AI (if needed)

        // Disable the statue's mesh renderers
        DisableMedeaMeshRenderers(); // Call your method to disable mesh renderers

        // Trigger the player death action (Low Sanity)
        PlayerDeath.GetInstance().LowSanityGhostKillsPlayer();

        // Optional: Log the killing action for debugging
        Debug.Log("I killed him");
    }

    // Method to disable mesh renderers of the statue
    private void DisableMedeaMeshRenderers()
    {
        // Assuming you have a list of SkinnedMeshRenderers
        SkinnedMeshRenderer[] meshRenderers = GetComponentsInChildren<SkinnedMeshRenderer>();

        foreach (var renderer in meshRenderers)
        {
            renderer.enabled = false; // Disable the mesh renderer
        }
    } 
    #endregion
}