using UnityEngine;
using System.Collections;

public class FloatingText2D : MonoBehaviour
{
  private UILabel   	__label;
	private Vector3			__pos;
	private Transform		__t;
	
	
	public bool 			followTarget = true;
	public Vector3			defaultSize = new Vector3(1,1,1);
	
	public GameObject		targetObject;
	public Camera			worldCamera;
	public Camera			guiCamera;
	public TweenPosition	tweenPos;
	
	
	public void init( string text_, GameObject gameObj_ )
	{
		this.text = text_;
		this.target = gameObj_;
	}
	
	public void init( string text_, Color clr_, GameObject gameObj_ )
	{
		this.color = clr_;
		this.text = text_;
		this.target = gameObj_;
	}
	
	public void spawnAt( GameObject targetObj_, Vector3 size_, Transform parent_ )
	{
		target = targetObj_;
		__t.parent = parent_;
		defaultSize = size_;
	}
	
	public void followingObject()
	{
		__pos = worldCamera.WorldToViewportPoint( targetObject.transform.position );
		__pos = guiCamera.ViewportToWorldPoint( __pos );
		
		__pos.z = 0f;
		transform.position =  __pos;
	}
	
	// Use this for initialization
	void Awake()
	{
		__t = transform;
		__label = GetComponent<UILabel>();
	}
	
	void Start()
	{
		if( guiCamera == null )
			guiCamera = NGUITools.FindCameraForLayer( gameObject.layer );

		__label.transform.localScale = new Vector3( __t.transform.localScale.x * defaultSize.x, __t.transform.localScale.y * defaultSize.y, 1f );
	}
	
	void LateUpdate()
	{
		if( followTarget ) followingObject();
	}
	
	// property
	//
	public string text
	{
		get { return __label.text; }
		set { __label.text = value; }
	}
	
	public Color color
	{
		get { return __label.color; }
		set { __label.color = value; }
	}
	
	public Vector3 size
	{
		get { return __label.transform.localScale; }
		set { __label.transform.localScale = value; }
	}
	
	public TweenPosition tweenPosition
	{
		get {
			TweenPosition _tp = GetComponent<TweenPosition>();
			if( _tp == null ) _tp = targetObject.AddComponent<TweenPosition>();
			return _tp;
		}
	}
	
	public GameObject target
	{
		get { return targetObject; }
		set { 
			targetObject = value; 
			worldCamera = NGUITools.FindCameraForLayer( targetObject.layer );
		}
	}
}