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

public class TopHeadBar : MonoBehaviour {

	public Image icon;
	public Text timeTxt;
	public Image hpBar;

	public Sprite myHpBarSprite;
	public Sprite allyHpBarSprite;
	public Sprite oppHpBarSprite;

	private Player player;
	private Craft craft;

	void Awake()
	{
		OnCraftChanged ();
	}

	public void SetPlayer(Player player)
	{
		if (player != null)
			player.GetHero().CraftChanged.RemoveListener (OnCraftChanged);

		this.player = player;
		this.player.GetHero().CraftChanged.AddListener (OnCraftChanged);
		OnCraftChanged ();
	}

	public Player GetPlayer()
	{
		return this.player;
	}

	private void OnCraftChanged ()
	{
		Dispose();

		if(player != null && player.GetHero().GetCraft() != null)
		{
			this.craft = player.GetHero().GetCraft();
			craft.Killed += OnKilled;
			craft.HpChanged += OnHpChanged;
			craft.OnSwapped += OnSwapped;

			timeTxt.enabled = false;
			hpBar.enabled = true;
			icon.enabled = true;

			OnCtrlChanged ();
			OnHpChanged();
			OnSwapped();
		}
		else
		{
			this.craft = null;
			icon.enabled = hpBar.enabled = false;
			timeTxt.enabled = true;
			timeTxt.text = "--";
		}
	}

	public void Refresh()
	{
		
	}

	void OnDestroy()
	{
		if (player != null)
			player.GetHero().CraftChanged.RemoveListener (OnCraftChanged);
		
		Dispose();
	}

	public void Dispose()
	{
		if(craft != null)
		{
			craft.Killed -= OnKilled;
			craft.HpChanged -= OnHpChanged;
			craft.OnSwapped -= OnSwapped;
			craft.OnCtrlChanged -= OnCtrlChanged;
		}
	}

	private void OnSwapped()
	{
		if(craft != null)
		{
			icon.sprite = Resources.Load<Sprite>(craft.GetIcon());
		}
	}

	private void OnKilled()
	{
		icon.enabled = false;
		timeTxt.enabled = true;
		timeTxt.text = Player.heroReliveHoldTime.ToString();
		hpBar.fillAmount = 0;
	}

	private void OnHpChanged()
	{
		if(craft != null)
		{
			hpBar.fillAmount = craft.hp / craft.maxHp;
		}
	}

	private void OnCtrlChanged()
	{
		if(craft.IsCtrl())
			hpBar.sprite = myHpBarSprite;
		else if(Session.GetInstance().GetBattleSession().IsAlly(craft.team))
			hpBar.sprite = allyHpBarSprite;
		else
			hpBar.sprite = oppHpBarSprite;
	}
}