using UnityEngine;
using System.Collections;

public class LoadPanoPositions2D : MonoBehaviour 
{
	[SerializeField] private PanoClassDB panoClassDB; // ScriptableObject containing collection of Panorama classes
	[SerializeField] private Texture2D panoIcon;
	[SerializeField] private float y = 1;
	[SerializeField] private int defaultZoom = 15;
	private OnlineMapsMarker[] panoMarkers;
	private Transform markersTransform;
	private float _y;
	
	private OnlineMaps mapInstance;

	// Use this for initialization
	void Start () 
	{
		//  OnlineMapsMarker[] panoIcons;
		mapInstance = OnlineMaps.instance;
		
		panoMarkers = new OnlineMapsMarker[panoClassDB.PanoClasses.Count];
		
		var panoClasses = panoClassDB.PanoClasses;
		var mapDatum = mapInstance.position;
		
		for(int i = 0; i < panoClasses.Count; i++)
		{
			panoMarkers[i] = new OnlineMapsMarker();
			panoMarkers[i].texture = panoIcon;
			panoMarkers[i].align = OnlineMapsAlign.Center;
			panoMarkers[i].label = panoClasses[i].PanoName;
			panoMarkers[i].range = new OnlineMapsRange(15,20);
			panoMarkers[i].position.x = mapDatum.x + (panoClasses[i].Position.x / 1000f);
			panoMarkers[i].position.y = mapDatum.y + (panoClasses[i].Position.y / 1000f);
			
		}
		
		mapInstance.AddMarkers(panoMarkers);
		
		mapInstance.OnChangeZoom += OnChangeZoom;
		
		OnChangeZoom();
	}
	
	private void Update()
	{
		if(markersTransform == null)
		{
			markersTransform = mapInstance.transform.FindChild("Markers");
			if(markersTransform != null)
				UpdatePosition();
		}
		else if (_y != y)
			UpdatePosition();
	}

    private void UpdatePosition()
    {
        _y = y;
        Vector3 position = markersTransform.localPosition;
        position.y = y;
        markersTransform.localPosition = position;
    }
	
	private void OnChangeZoom()
	{
		float originalScale = 1 << defaultZoom;
        float currentScale = 1 << OnlineMaps.instance.zoom;
		
		for(int i = 0; i < panoMarkers.Length; i++)
		{
        	panoMarkers[i].scale = currentScale / originalScale;
		}
	}

}