using UnityEngine;
using UnityEngine.EventSystems;
using UnityEngine.UI;

public class CamereModeButton : ImageToggle
{
    private void Start()
    {
        if (ProcessInput.Instance != null)
            ProcessInput.Instance.inputModule.onCameraModeChange += OnCameraModeChange;
    }

    private void OnDestroy()
    {
        if (!GameManager.applicationQuit &&
            ProcessInput.Instance != null)
            ProcessInput.Instance.inputModule.onCameraModeChange -= OnCameraModeChange;
    }

    private void OnCameraModeChange(bool isOn)
    {
        SetImage(isOn);
    }

    public override bool GetValue()
    {
        return ProcessInput.Instance != null && ProcessInput.Instance.inputModule.isCameraMode;
    }

    public override void SetValue(bool isOn)
    {
        if (ProcessInput.Instance != null)
            ProcessInput.Instance.inputModule.SetCameraModel(isOn);
    }
}

[RequireComponent(typeof(Image))]
public abstract class ImageToggle : MonoBehaviour, IPointerDownHandler, IPointerUpHandler, IPointerExitHandler
{
    private int? _pointerId;
    private Image _image;
    public Sprite onSprite;
    public Sprite offSprite;

    private void Awake()
    {
        _image = GetComponent<Image>();
    }

    protected virtual void OnEnable()
    {
        SetImage(GetValue());
    }
    
    private void OnApplicationFocus(bool hasFocus)
    {
        if (!hasFocus)
            CancelPointer();
    }

    public abstract bool GetValue();

    public abstract void SetValue(bool isOn);

    protected void SetImage(bool isOn)
    {
        _image.sprite = isOn ? onSprite : offSprite;
    }

    public void OnPointerDown(PointerEventData eventData)
    {
        if (_pointerId == null)
        {
            _pointerId = eventData.pointerId;
            SetImage(!GetValue());
        }
    }

    //void WCCameraOperation()
    //{
    //    if (GameManager.gameManager.PlayerDataPool.WCCamera)
    //    {
    //        GameManager.gameManager.PlayerDataPool.WCCamera.enabled = false;
    //        GameManager.gameManager.PlayerDataPool.WCCamera = null;
    //    }

    //    if (GameManager.gameManager.PlayerDataPool.IsInWeddingCar)
    //        if (Games.Scene.SceneLogic.CameraController != null)
    //            Games.Scene.SceneLogic.CameraController.OnWCMovie(false);
    //}

    public void OnPointerUp(PointerEventData eventData)
    {
        if (_pointerId == eventData.pointerId)
        {
            _pointerId = null;
            var value = GetValue();
            SetValue(!value);
        }
    }

    public void OnPointerExit(PointerEventData eventData)
    {
        if (_pointerId == eventData.pointerId)
            CancelPointer();
    }

    private void CancelPointer()
    {
        if (_pointerId != null)
        {
            _pointerId = null;
            SetImage(GetValue());
        }
    }
}