namespace GMap.NET.MapProviders
{
   using System;

   /// <summary>
   /// OpenStreetMapQuest provider - http://wiki.openstreetmap.org/wiki/MapQuest
   /// </summary>
   public class OpenStreetMapQuestProvider : OpenStreetMapProviderBase
   {
      public static readonly OpenStreetMapQuestProvider Instance;

      OpenStreetMapQuestProvider()
      {
         Copyright = string.Format("© MapQuest - Map data ©{0} MapQuest, OpenStreetMap", DateTime.Today.Year);
      }

      static OpenStreetMapQuestProvider()
      {
         Instance = new OpenStreetMapQuestProvider();
      }

      #region GMapProvider Members

      readonly Guid id = new Guid("D0A12840-973A-448B-B9C2-89B8A07DFF0F");
      public override Guid Id
      {
         get
         {
            return id;
         }
      }

      readonly string name = "OpenStreetMapQuest";
      public override string Name
      {
         get
         {
            return name;
         }
      }

      GMapProvider[] overlays;
      public override GMapProvider[] Overlays
      {
         get
         {
            if(overlays == null)
            {
               overlays = new GMapProvider[] { this };
            }
            return overlays;
         }
      }

      public override PureImage GetTileImage(GPoint pos, int zoom)
      {
         string url = MakeTileImageUrl(pos, zoom, string.Empty);

         return GetTileImageUsingHttp(url);
      }

      #endregion

      string MakeTileImageUrl(GPoint pos, int zoom, string language)
      {
         return string.Format(UrlFormat, GetServerNum(pos, 3) + 1, zoom, pos.X, pos.Y);
      }

      static readonly string UrlFormat = "http://otile{0}.mqcdn.com/tiles/1.0.0/osm/{1}/{2}/{3}.png";
   }
}