using UnityEngine;
using System.Collections;
using UnityEngine.UI;

public class StarsIndicator : MonoBehaviour
{
	public Slider slider;
	public StarTarget star1, star2, star3;

	int _maxScore;
	float _maxWidth;

	void Awake()
	{
		//Get the width from the slider's sprites
		_maxWidth = slider.GetComponent<RectTransform>().sizeDelta.x;
		slider.value = 0;
	}

	void OnEnable()
	{
		NotificationCenter.AddListener(OnScoreChanged, NotificationType.UpdateScoreLabel);
		var level = LevelsManager.Instance.CurrentLevel;
		SetStarPositions(level.star1Threshold, level.star2Threshold, level.star3Threshold);
	}

	void OnDisable()
	{
		NotificationCenter.RemoveListener(OnScoreChanged, NotificationType.UpdateScoreLabel);
	}

	void SetStarPositions(int star1Threshold, int star2Threshold, int star3Threshold)
	{
		_maxScore = star3Threshold;
		star1.SetPosition(star1Threshold, _maxScore, _maxWidth);
		star2.SetPosition(star2Threshold, _maxScore, _maxWidth);
		star3.SetPosition(star3Threshold, _maxScore, _maxWidth);
	}

	void OnScoreChanged(Notification note)
	{
		int score = GameDataManager.Instance.Score;
		float newSliderValue = score / (float)_maxScore;
		iTween.Stop(gameObject);
		iTween.ValueTo(gameObject, iTween.Hash(
			"from", slider.value,
			"to", newSliderValue,
			"time", 0.3f,
			"onupdate", "OniTweenUpdateSlider",
			"onupdatetarget", gameObject));
	}

	void OniTweenUpdateSlider(float newValue)
	{
		slider.value = newValue;
	}

}