using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using ThoughtWorks.QRCode.Codec;
using System.Drawing;
using System.Drawing.Imaging;
using Game.Utils;
using System.Drawing.Drawing2D;
using Game.Facade;
using System.Net;
using System.IO;

namespace Game.Web.WS
{
    /// <summary>
    /// QRCode 的摘要说明
    /// </summary>
    public class QRCode : IHttpHandler
    {

        public void ProcessRequest(HttpContext context)
        {
            GetQRCode(context);
        }

        /// <summary>
        /// 绘制二维码
        /// </summary>
        /// <param name="context"></param>
        private void GetQRCode(HttpContext context)
        {
            string encodeData = GameRequest.GetQueryString("qt");
            string icoURL = GameRequest.GetQueryString("qm");
            int width = GameRequest.GetQueryInt("qs", 0);
            if (encodeData != string.Empty)
            {
                calQrcode(encodeData, icoURL, width, context);
            }
        }

        /// <summary>
        /// 按照指定的大小绘制二维码
        /// </summary>
        /// <param name="sData"></param>
        /// <param name="width"></param>
        /// <returns></returns>
        private void calQrcode(string sData, string icoURL, int size, HttpContext context)
        {
            //二维码版本,大小获取
            Color qrCodeBackgroundColor = Color.White;
            Color qrCodeForegroundColor = Color.Black;
            int length = System.Text.Encoding.UTF8.GetBytes(sData).Length;

            //生成二维码数据
            QRCodeEncoder qrCodeEncoder = new QRCodeEncoder();
            qrCodeEncoder.QRCodeEncodeMode = QRCodeEncoder.ENCODE_MODE.BYTE;
            qrCodeEncoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.M;//使用M纠错级别
            qrCodeEncoder.QRCodeVersion = 0;
            var encodedData = qrCodeEncoder.Encode(sData, System.Text.Encoding.UTF8);

            //绘制图片
            int x = 0, y = 0;
            int w = 0, h = 0;
            // 二维码矩阵单边数据点数目
            int count = encodedData.Length;
            // 获取单个数据点边长
            double sideLength = Convert.ToDouble(size) / count;
            // 初始化背景色画笔
            SolidBrush backcolor = new SolidBrush(qrCodeBackgroundColor);
            // 初始化前景色画笔
            SolidBrush forecolor = new SolidBrush(qrCodeForegroundColor);
            // 定义画布
            Bitmap image = new Bitmap(size, size);
            // 获取GDI+绘图图画
            Graphics graph = Graphics.FromImage(image);
            // 先填充背景色
            graph.FillRectangle(backcolor, 0, 0, size, size);

            // 变量数据矩阵生成二维码
            for (int row = 0; row < count; row++)
            {
                for (int col = 0; col < count; col++)
                {
                    // 计算数据点矩阵起始坐标和宽高
                    x = Convert.ToInt32(Math.Round(col * sideLength));
                    y = Convert.ToInt32(Math.Round(row * sideLength));
                    w = Convert.ToInt32(Math.Ceiling((col + 1) * sideLength) - Math.Floor(col * sideLength));
                    h = Convert.ToInt32(Math.Ceiling((row + 1) * sideLength) - Math.Floor(row * sideLength));

                    // 绘制数据矩阵
                    graph.FillRectangle(encodedData[col][row] ? forecolor : backcolor, x, y, w, h);
                }
            }

            //添加LOGO
            string path = context.Server.MapPath("/favicon.ico");            
            Bitmap logoImage = null;
            FileInfo fileInfo = new FileInfo(path);
            if (fileInfo.Exists)
            {
                logoImage = new Bitmap(path);
            }
            if (icoURL != "")
            {
                HttpWebRequest webRequest = (HttpWebRequest)HttpWeb