using System;

using System.Collections.Generic;

using System.Diagnostics;

using System.Globalization;

using System.Text;

using System.Xml;

using GMap.NET.Internals;

using GMap.NET.MapProviders;

using GMap.NET.Projections;

namespace GMap.NET.GMap.NET.MapProviders.Baidu

{

    public abstract class BaiduMapProviderBase : GMapProvider

    {

        private string ClientKey = "1308e84a0e8a1fc2115263a4b3cf87f1";

        public BaiduMapProviderBase()

        {

            MaxZoom = null;

            RefererUrl = "http://map.baidu.com";

            Copyright = string.Format("©{0} Baidu Corporation, ©{0} NAVTEQ, ©{0} Image courtesy of NASA", DateTime.Today.Year);

        }

        public override PureProjection Projection

        {

            get { return MercatorProjection.Instance; }

        }

        GMapProvider[] overlays;

        public override GMapProvider[] Overlays

        {

            get

            {

                if (overlays == null)

                {

                    overlays = new GMapProvider[] { this };

                }

                return overlays;

            }

        }

    }

    public class BaiduMapProvider : BaiduMapProviderBase

    {

        public static readonly BaiduMapProvider Instance;

        readonly Guid id = new Guid("608748FC-5FDD-4d3a-9027-356F24A755E5");

        public override Guid Id

        {

            get { return id; }

        }

        readonly string name = "BaiduMap";

        public override string Name

        {

            get

            {

                return name;

            }

        }

        static BaiduMapProvider()

        {

            Instance = new BaiduMapProvider();

        }

        public override PureImage GetTileImage(GPoint pos, int zoom)

        {

            string url = MakeTileImageUrl(pos, zoom, LanguageStr);

            return GetTileImageUsingHttp(url);

        }

        string MakeTileImageUrl(GPoint pos, int zoom, string language)

        {

            zoom = zoom - ;

            var offsetX = Math.Pow(, zoom);

            var offsetY = offsetX - ;

            var numX = pos.X - offsetX;

            var numY = -pos.Y + offsetY;

            zoom = zoom + ;

            var num = (pos.X + pos.Y)% + ;

            var x = numX.ToString().Replace("-", "M");

            var y = numY.ToString().Replace("-", "M");

            //原来：http://q3.baidu.com/it/u=x=721;y=209;z=12;v=014;type=web&fm=44

            //更新：http://online1.map.bdimg.com/tile/?qt=tile&x=23144&y=6686&z=17&styles=pl

            string url = string.Format(UrlFormat, x, y, zoom);

            Console.WriteLine("url:" + url);

            return url;

        }

        static readonly string UrlFormat = "http://online1.map.bdimg.com/tile/?qt=tile&x={0}&y={1}&z={2}&styles=pl";

    }

}