using UnityEngine;
using System.Collections;

using UnityEngine.UI;

public class HealthBarHUD : MonoBehaviour {

	[SerializeField]
	private Image _image;

	[SerializeField]
	private Sprite[] _textures;

	private float _percentagePerSlot;

	// Use this for initialization
	void Start () {
		_percentagePerSlot = 100.0f / _textures.Length;
		PlayerHealthUpdateEvent.handler += OnPlayerHealthUpdate;
	}

	void OnDestroy () {
		PlayerHealthUpdateEvent.handler -= OnPlayerHealthUpdate;
	}

	private void OnPlayerHealthUpdate (PlayerHealthUpdateEvent e) {
		if (!e.Victim.Identity.hasAuthority)
			return;

		float percentage = e.CurrentHealth / e.MaxHealth * 100;
		float slot = percentage / _percentagePerSlot;
		_image.sprite = _textures[Mathf.Clamp (Mathf.CeilToInt (slot), 0, _textures.Length - 1)];
	}
}