using DG.Tweening;
using UnityEngine;

public class ReleasableButton : MonoBehaviour
{
    public delegate void OnButtonPressedDelegate();
    public event OnButtonPressedDelegate OnButtonPressed;
    public delegate void OnButtonReleasedDelegate();
    public event OnButtonReleasedDelegate OnButtonReleased;

    public Transform movableParts;
    public float moveDuration = 0.25f;
    public float moveAmount = 0.05f;

    private bool isLocked;
    private float upPositionY;
    private float downPositionY;

    // button state:
    // 0 - up
    // 1 - down
    // 2 - moving
    private int buttonState;

    private void Awake()
    {
        upPositionY = movableParts.localPosition.y;
        downPositionY = movableParts.localPosition.y - moveAmount;
        buttonState = 0;
    }

    // Start is called before the first frame update
    void Start()
    {
        
    }

    // Update is called once per frame
    void Update()
    {
        
    }

    private void OnTriggerEnter(Collider collider)
    {
        // if button is up, start moving down
        if (buttonState == 0 &&!isLocked && collider.gameObject.tag.EndsWith("Hand"))
        {
            Activate();
            OnButtonPressed?.Invoke();
        }
    }

    private void OnTriggerExit(Collider collider)
    {
        // if button is down, start moving up
        if (buttonState == 1 && !isLocked && collider.gameObject.tag.EndsWith("Hand"))
        {
            Deactivate();
            OnButtonReleased?.Invoke();
        }
    }

    private void Activate()
    {
        buttonState = 2;
        movableParts.DOLocalMoveY(downPositionY, moveDuration).OnComplete(() =>
        {
            buttonState = 1;
        });
        
        AudioManager.Instance.PlayAttachedInstance(FMODEvents.Instance.Click, gameObject);
    }

    private void Deactivate()
    {
        buttonState = 2;
        movableParts.DOLocalMoveY(upPositionY, moveDuration).OnComplete(() =>
        {
            buttonState = 0;
        });
        
        AudioManager.Instance.PlayAttachedInstance(FMODEvents.Instance.Click, gameObject);
    }

    public void Lock()
    {
        isLocked = true;
    }

    public void Unlock()
    {
        isLocked = false;
    }
}