using UnityEngine;
using NaughtyAttributes;

[System.Serializable]
public class CameraSwaying
{
    #region Variables
    [Space, Header("Sway Settings")]
    [SerializeField] private float swayAmount = 0f;
    [SerializeField] private float swaySpeed = 0f;
    [SerializeField] private float returnSpeed = 0f;
    [SerializeField] private float changeDirectionMultiplier = 0f;

    [SerializeField] private AnimationCurve swayCurve = new AnimationCurve();

    #region Private
    private Transform m_camTransform;
    private float _scrollSpeed;

    private float m_xAmountThisFrame;
    private float m_xAmountPreviousFrame;

    private bool m_diffrentDirection;
    #endregion
    #endregion

    #region Custom Methods
    public void Init(Transform _cam)
    {
        m_camTransform = _cam;
    }

    public void SwayPlayer(Vector3 _inputVector, float _rawXInput)
    {
        float _xAmount = _inputVector.x;

        m_xAmountThisFrame = _rawXInput;

        if (_rawXInput != 0f) // if we have some input
        {
            if (m_xAmountThisFrame != m_xAmountPreviousFrame && m_xAmountPreviousFrame != 0) // if our previous dir is not equal to current one and the previous one was not idle
                m_diffrentDirection = true;

            // then we multiplier our scroll so when changing direction it will sway to the other direction faster
            float _speedMultiplier = m_diffrentDirection ? changeDirectionMultiplier : 1f;
            _scrollSpeed += (_xAmount * swaySpeed * Time.deltaTime * _speedMultiplier);
        }
        else // if we are not moving so there is no input
        {
            if (m_xAmountThisFrame == m_xAmountPreviousFrame) // check if our previous dir equals current dir
                m_diffrentDirection = false; // if yes we want to reset this bool so basically it can be used correctly once we move again

            _scrollSpeed = Mathf.Lerp(_scrollSpeed, 0f, Time.deltaTime * returnSpeed);
        }

        _scrollSpeed = Mathf.Clamp(_scrollSpeed, -1f, 1f);
        //Debug.Log(_scrollSpeed);

        float _swayFinalAmount;

        if (_scrollSpeed < 0f)
            _swayFinalAmount = -swayCurve.Evaluate(_scrollSpeed) * -swayAmount;
        else
            _swayFinalAmount = swayCurve.Evaluate(_scrollSpeed) * -swayAmount;

        Vector3 _swayVector;
        _swayVector.z = _swayFinalAmount;

        m_camTransform.localEulerAngles = new Vector3(m_camTransform.localEulerAngles.x, m_camTransform.localEulerAngles.y, _swayVector.z);

        m_xAmountPreviousFrame = m_xAmountThisFrame;
    }
    #endregion
}