using UnityEngine;
using System.Collections;

public class VisibilityZone : Zone {
	private GameObject obj;
	private float startupDepth;
	private Material startupMaterial;
	private bool startupVisibility;
	private SpriteRenderer renderer;
	private bool initialized;
	private bool hidden;
	public ZoneVisibilityControl control;

	public Predicate[] visibilityPredicates;

	// Use this for initialization
	void Start () {
		Init ();
	}

	public void Init(){
		if(!initialized){
			obj = gameObject;
			startupDepth = obj.transform.position.z;
			renderer = obj.GetComponent<SpriteRenderer>();
			startupMaterial = renderer.sharedMaterial;
			startupVisibility = obj.activeSelf;
			initialized = true;
		}
	}

	public bool IsInside(Vector2 position){
		var b = renderer.bounds;

		var r = new Rect(b.min.x, b.min.y, b.max.x - b.min.x, b.max.y - b.min.y);
		return r.Contains(position);
		//Vector3 tp = new Vector3(position.x, position.y, b.min.z);
		//return b.Contains(tp);
	}

	public void Hide(Material hideMaterial, float hideDepth){
		hidden = true;
		var pos = obj.transform.position;
		pos.z = hideDepth;
		obj.transform.position = pos;
		renderer.sharedMaterial = hideMaterial;
		obj.SetActive(true);
	}
	
	public void Show(){
		hidden = false;
		var pos = obj.transform.position;
		pos.z = startupDepth;
		obj.transform.position = pos;
		renderer.sharedMaterial = startupMaterial;
		obj.SetActive(startupVisibility);
	}
	
	// Update is called once per frame
	void Update () {
	    if (control == null) {
	        return;
	    }
		foreach(var p in visibilityPredicates){
			if(p != null && p.Check(this)){
				Show ();
				return;
			}
		}
		Hide (control.hideMaterial, control.hideDepth);
	}
}