using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class EnemyPatroling : MonoBehaviour
{
    [SerializeField] Transform _player;
    [SerializeField] Transform[] _patrolPoint;
    [SerializeField] Enemy enemy;
    [SerializeField] float _timeBetweenAttack;
    Vector3 _startPoint;

    float _sightRange;
    float _distancePlayer;
    float _distanceStartPoint;
    float _distancePatrolPosition;
    float _speedMove;
    
    bool _returnStartPoint;
    bool _followPlayer;
    bool _patrolOrNot;
    bool _timeAttack;
    Animator _animator;
    int _movePoint;

    void Start()
    {
        _animator = GetComponent<Animator>();
        enemy = GetComponent<Enemy>();
        _timeBetweenAttack = 2.5f;
        _speedMove = 3f;
        _movePoint = Random.Range(0, _patrolPoint.Length);
        _patrolOrNot = true;
        _followPlayer = false;
        _returnStartPoint = false;
        _sightRange = 10f;
        _startPoint = transform.position;
    }

    void Update()
    {
        _distancePlayer = Vector3.Distance(_player.transform.position, transform.position);
        if (_returnStartPoint == true)
        {
            _timeAttack = false;
            _animator.SetBool("Run", true);
            ReturnStartPoint();
        }
        if (_distancePlayer <= _sightRange && _returnStartPoint == false)
        {
            _patrolOrNot = false;
            _followPlayer = true;    
        }
        if (_distancePlayer >= 2 && _timeAttack == true)
        {
            _animator.SetBool("Run", true);
            Following();
        }
        if (_distancePlayer <= 2 && _timeAttack == true)
        {
            if (_timeBetweenAttack >= 2.5f)
            {
                _animator.SetBool("Run", false);
                _animator.SetTrigger("Attack");
                enemy.Attack();
            }
            _timeBetweenAttack -= 1 * Time.deltaTime;
            if (_timeBetweenAttack <= 0)
            {
                _timeBetweenAttack = 2.5f;
            }
        }
        if (_distancePlayer >= 3 && _timeAttack == true)
        {
            _timeBetweenAttack = 2.5f;
        }
        if (_followPlayer == true && _timeAttack==false)
        {
            _animator.SetBool("Run", true);
            Following();
        }
        if (_patrolOrNot == true && _followPlayer == false && _returnStartPoint == false && _timeAttack == false)
        {
            _animator.SetBool("Run", false);
            Patrolling();
        }
    }

    private void Following()
    {
        _distanceStartPoint = Vector3.Distance(_startPoint, transform.position);
        Quaternion _targetRotation = Quaternion.LookRotation(_player.transform.position - transform.position);
        transform.rotation = Quaternion.Slerp(transform.rotation, _targetRotation, 3f * Time.deltaTime);
        transform.position = Vector3.MoveTowards(transform.position, _player.position, _speedMove * Time.deltaTime);
        if (_distanceStartPoint >= 30f)
        {
            _followPlayer = false;
            _returnStartPoint = true;
        }
        if (_distancePlayer <= 2f)
        {
            _timeAttack = true;   
        }
    }
    private void ReturnStartPoint()
    {
        Quaternion _targetRotation = Quaternion.LookRotation(_startPoint - transform.position);
        transform.rotation = Quaternion.Slerp(transform.rotation, _targetRotation, 3f * Time.deltaTime);
        transform.position += transform.forward* 6f * Time.deltaTime;
        _distanceStartPoint = Vector3.Distance(_startPoint, transform.position);
        if (_distanceStartPoint <= 5)
        {
            _returnStartPoint = false;
            _patrolOrNot = true;
        }
    }
    private void Patrolling()
    {   
        {
            Quaternion _targetRotation = Quaternion.LookRotation(_patrolPoint[_movePoint].position - transform.position);
            transform.rotation = Quaternion.Slerp(transform.rotation, _targetRotation, 3f * Time.deltaTime);
            transform.position = Vector3.MoveTowards(transform.position, _patrolPoint[_movePoint].position, _speedMove * Time.deltaTime);
            _distancePatrolPosition = Vector3.Distance(_patrolPoint[_movePoint].position, transform.position);
            if (_distancePatrolPosition <= 3f)
            {
                _movePoint = Random.Range(0, _patrolPoint.Length);
            }
        }

    }
}