using UnityEngine;
using System.Collections;

public class TeamSideBarContainer : MonoBehaviour {

	public enum State
	{
		Showing,
		Shown,
		Hiding,
		Hiden
	}

	public GameObject bar;
	public GameObject flag;

	private CrystalBase crystal;

	public State state = State.Hiding;

	public void setCrystal(CrystalBase crystal)
	{
		this.crystal = crystal;
		if(crystal != null)
		{
			bar.GetComponent<GUITexture>().enabled = flag.GetComponent<GUITexture>().enabled = true;
		}
		else
		{
			bar.GetComponent<GUITexture>().enabled = flag.GetComponent<GUITexture>().enabled = false;
		}
		UpdateBar();
	}

	// Update is called once per frame
	public void UpdateBar () 
	{
		if(crystal != null)
		{
			float powerLevel = (float)crystal.powerLevel;
			TeamUtil.Team team = crystal.team;

			Rect rectBar = bar.GetComponent<GUITexture>().pixelInset;
			Rect rectFlag = flag.GetComponent<GUITexture>().pixelInset;
			if(team == TeamUtil.Team.Blue)
			{
				rectFlag.x = rectBar.x + rectBar.width/2f - (rectBar.width-6f)/10f*powerLevel - rectFlag.width/2f;
			}
			else if(team == TeamUtil.Team.Red)
			{
				rectFlag.x = rectBar.x + rectBar.width/2f + (rectBar.width-6f)/10f*powerLevel - rectFlag.width/2f;
			}
			else
			{
				rectFlag.x = rectBar.x + rectBar.width/2f - rectFlag.width/2f;
			}
			flag.GetComponent<GUITexture>().pixelInset = rectFlag;
		}
	}

	void Update()
	{
		if(state == State.Showing)
		{
			Color color = flag.GetComponent<GUITexture>().color;
			color.a += GameTime.deltaTime;
			if(color.a >= 1f)
			{
				state = State.Shown;
				return;
			}
			
			if(color.a >= 1f)
			{
				color.a = 1f;
				state = State.Shown;
			}
			flag.GetComponent<GUITexture>().color = bar.GetComponent<GUITexture>().color = color;
		}
		else if(state == State.Hiding)
		{
			Color color = flag.GetComponent<GUITexture>().color;
			if(color.a <= 0)
			{
				state = State.Hiden;
				return;
			}
			
			color.a -= GameTime.deltaTime;
			if(color.a <= 0)
			{
				color.a = 0;
				state = State.Hiden;
			}
			flag.GetComponent<GUITexture>().color = bar.GetComponent<GUITexture>().color = color;
		}

		updatePosition();
	}

	private void updatePosition()
	{
		if(crystal == null)
		{
			return;
		}
		Vector3 position = crystal.position;
		position.y += 5f;
		Vector3 screenPosition = Camera.main.WorldToScreenPoint(position);
		
		position.x = screenPosition.x/Screen.width;
		position.y = screenPosition.y/Screen.height;
		position.z = -1f;
		
		this.transform.position = position;
	}
}