using UnityEngine;

public class UIFollowTarget_Ino : MonoBehaviour
{
	/// <summary>
	/// 3D target that this object will be positioned above.
	/// </summary>
	public Transform target;
    public bool isTarget;

	/// <summary>
	/// UI 위치 오프셋, z는 0
	/// </summary>
	public Vector3 offSet;

	/// <summary>
	/// UI camera to use.
	/// </summary>
	public Camera uiCamera;
    bool isUICam;

	Transform mTrans;
	int mIsVisible = -1;

	/// <summary>
	/// Whether the target is currently visible or not.
	/// </summary>

	public bool isVisible { get { return mIsVisible == 1; } }
	public bool runUpdate { get; set; }

	/// <summary>
	/// Cache the transform;
	/// </summary>

	void Awake() { mTrans = transform; }

	/// <summary>
	/// Update the position of the HUD object every frame such that is position correctly over top of its real world object.
	/// </summary>

	void Update()
	{
		if (runUpdate)
		{
            if (!isUICam)
            {
                uiCamera = NewGameUI.Ins.UICamera;
                isUICam = uiCamera;
            }
			if (isTarget && isUICam)
			{
				Vector3 pos = Camera.main.WorldToViewportPoint(target.position);

				// Determine the visibility and the target alpha
				//int isVisible = (gameCamera.orthographic || pos.z > 0f) && (pos.x > 0f && pos.x < 1f && pos.y > 0f && pos.y < 1f) ? 1 : 0;
				//bool vis = (isVisible == 1);

				// If visible, update the position
				//if (vis)
				{
					pos = mTrans.parent.InverseTransformPoint(uiCamera.ViewportToWorldPoint(pos));
					pos.z = 0f;
					mTrans.localPosition = pos + offSet;
				}
			}
			else
				gameObject.SetActive(false);
		}
	}
}