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

public class HeadBar : MonoBehaviour {

	public Image bar;
	public Text text;
	public Animator radioAnim;

	public Sprite[] bgList;


	public GameObject spellBar;
	public Image spellProgress;


	private BattleObject owner;

	private RectTransform rectTrans;
	private RectTransform canvasTrans;

	public void Init(BattleObject owner)
	{
		if(Session.GetInstance().GetBattleSession() == null)
		{
			Destroy(this.gameObject);
		}

		this.owner = owner;
		rectTrans = GetComponent<RectTransform> ();
		rectTrans.SetSiblingIndex(0);
		canvasTrans = GameObject.FindObjectOfType<Canvas> ().GetComponent<RectTransform>();

		HideSpell();

		UpdateHpBar();
		LateUpdate();
	}

	public void UpdateColor()
	{
		Player myPlayer = Session.GetInstance().GetBattleSession().myPlayer;
		if(owner is Craft && (owner as Craft).IsCtrl())
		{
			bar.sprite = bgList[0];
		}
		else if(myPlayer.team == owner.team)
		{
			bar.sprite = bgList[1];
		}
		else
		{
			bar.sprite = bgList[2];
		}
	}

	public void RadioAlert()
	{
		radioAnim.Play("RadioAlertShow", 0, 0);
	}
	
	// Update is called once per frame
	void LateUpdate () 
	{
		if(owner != null)
		{
			if(owner.IsDead())
			{
				Destroy(this.gameObject);
			}
			else
			{
				UpdatePosition();
			}
		}
	}

	private void UpdatePosition()
	{
		Vector3 position = owner.position;
		position.y += owner.headBarHeight;
		position.z += owner.headBarHeight;
		Vector3 screenPosition = Camera.main.WorldToScreenPoint(position);

		position.x = screenPosition.x/(float)Screen.width;
		position.y = screenPosition.y/(float)Screen.height;

		position.x = position.x*canvasTrans.sizeDelta.x - canvasTrans.sizeDelta.x/2f;
		position.y = position.y*canvasTrans.sizeDelta.y - canvasTrans.sizeDelta.y/2f;
		position.z = 0;

		rectTrans.anchoredPosition = position;
	}


	public void UpdateHpBar()
	{
		float percent = owner.hp/owner.maxHp;
		bar.fillAmount = percent;
	}



	public void SetSpellProgress(float value, float total)
	{
		if(!spellBar.activeInHierarchy)
			spellBar.SetActive(true);

		float percent = value/total;
		spellProgress.fillAmount = Mathf.Min(percent, 1f);
	}

	public void HideSpell()
	{
		spellBar.SetActive(false);
	}
}