using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Web;
using VRS.Util;

namespace VRS.Handler
{
    /// <summary>
    /// CosFiles 的摘要说明
    /// </summary>
    public class CosFiles : BaseHandler, IHttpHandler
    {

        public void ProcessRequest(HttpContext context)
        {
            if (HasFile(context))
            {
                var file = UploadDefaultFile(context);
                var extension = file.FileName.Substring(file.FileName.LastIndexOf('.'));
                //var ext = ".data";
                var ext = extension;
                if (file.ContentLength > 0)
                {
                    byte[] buffer = new byte[5 * 1024 * 1024];
                    int actual = 0;
                    Stopwatch sw1 = new Stopwatch();
                    //开始计时  
                    sw1.Start();
                    //先保存到内存流中MemoryStream
                    MemoryStream ms = new MemoryStream();
                    while ((actual = file.InputStream.Read(buffer, 0, 5 * 1024 * 1024)) > 0)
                    {
                        ms.Write(buffer, 0, actual);
                    }
                    ms.Position = 0;
                    //再从内存流中读取到byte数组中
                    buffer = ms.ToArray();

                    sw1.Stop();
                    //获取运行时间[毫秒]  
                    var ElapsedMilliseconds1 = sw1.ElapsedMilliseconds;
                    BasePage.write_log("字节转化毫米：" + ElapsedMilliseconds1);

                    var type = "upload";
                    string appid = "1300932214";
                    string region = "ap-nanjing"; //地域
                    string buket_name = "lzy";//lzy
                    var originalName = file.FileName;
                    var index = originalName.LastIndexOf(".");
                    var extend = originalName.Substring(index + 1);
                    CosClient client = new CosClient(appid, region);
                    string file_name = BasePage.GetRoomNo() + "." + extend;

                    Stopwatch sw3 = new Stopwatch();
                    //开始计时  
                    sw3.Start();

                    var src = client.UploadFile(buket_name, "/" + type + "/" + file_name, buffer);

                    sw3.Stop();
                    //获取运行时间[毫秒]  
                    var times3 = sw3.ElapsedMilliseconds;
                    BasePage.write_log("上传cos毫秒：" + times3);

                    if (src.Code == 200)
                    {
                        var download_url = "https://" + buket_name + "-" + appid + ".cos." + region + ".myqcloud.com/" + type + "/" + file_name;
                        var result = GetResult(true, download_url, "上传成功！");
                        context.Response.Write(result);
                        context.Response.End();
                    }
                    else
                    {
                        var result = GetResult(false, null, "上传失败，原因：" + src.Message);
                        context.Response.Write(result);
                        context.Response.End();
                    }
                }
            }
            var end = GetResult(false, null, "文件不存在");
            context.Response.Write(end);
            context.Response.End();
        }

        /// <summary>
        /// 异步完成上传COS
        /// </summary>
        /// <param name="obj"></param>
        void UploadAsync(IAsyncResult obj)
        {
            PostedFile postedFile = (PostedFile)obj.AsyncState;
            try
            {
                /*
                CosClass2 cosClass = new CosClass2(ConfigurationManager.AppSettings["Protocol"], ConfigurationManager.AppSettings["Bucket"], ConfigurationManager.AppSettings["Region"], ConfigurationManager.AppSettings["SecretId"], ConfigurationManager.AppSettings["SecretKey"]);
                postedFile.url = cosClass.Upload(string.Format("/{0}", postedFile.fileName), postedFile.postArray);
                */
                var type = "upload";
                string appid = "1300932214";
                string region = "ap-nanjing"; //地域
                string buket_name = "lzy";//lzy
                CosClient client = new CosClient(appid, region);
                Stopwatch sw3 = new Stopwatch();
                //开始计时  
                sw3.Start();
                long times3 = 0;

              
                var originalName = postedFile.fileName;
                var index = originalName.LastIndexOf(".");
                var prefix = originalName.Substring(0, index);
                var extend = originalName.Substring(index+1);
                var bytes = postedFile.postArray;
                string file_name = BasePage.GetRoomNo() +"."+ extend;

                var src = client.UploadFile(buket_name, "/" + type + "/" + file_name, bytes);
                //结束计时  
                sw3.Stop();
                if (src.Code == 200)
                {
                    var download_url = "https://" + buket_name + "-" + appid + ".cos." + region + ".myqcloud.com/" + type + "/" + file_name;
                    postedFile.state = 1;
                    postedFile.url = download_url;
                }
                else
                {
                    postedFile.state = 2;
                    postedFile.message = "上传失败，原因：" + src.Message;
                }
            }
            catch(Exception ex)
            {
                postedFile.state = 2;
                postedFile.message = "上传失败，原因：" + ex.Message;
            }
        }
        public class PostedFile
        {
            public string fileName;
            public byte[] postArray;
            public string url;
            public int state;
            /// <summary>
            /// 消息
            /// </summary>
            public string message;
        }

        public bool IsReusable
        {
            get
            {
                return false;
            }
        }

        /// <summary>
        /// 获取GUID
        /// </summary>
        /// <returns></returns>
        protected string GetGuid()
        {
            return Guid.NewGuid().ToString();
        }



        /// <summary>
        /// 是否有上传文件
        /// </summary>
        /// <returns></returns>
        protected bool HasFile(HttpContext context)
        {
            return context.Request.Files.Count > 0;
        }

        /// <summary>
        /// 上传文件集合
        /// </summary>
        /// <returns></returns>
        protected HttpFileCollection UploadFiles(HttpContext context)
        {
            if (context.Request.Files.Count > 0)
                return context.Request.Files;
            else
                return null;
        }

        /// <summary>
        /// 获取上传默认文件（第1个文件）
        /// </summary>
        /// <returns>如果不存在则返回null</returns>
        protected HttpPostedFile UploadDefaultFile(HttpContext context)
        {
            var collection = UploadFiles(context);
            if (null == collection)
                return null;
            else
                return collection[0];
        }
        /// <summary>
        /// 返回上传文件集合
        /// </summary>
        /// <returns>如果不存在则返回null</returns>
        protected HttpFileCollection UpLoadFileCollection(HttpContext context)
        {
            var collection = UploadFiles(context);
            if (null == collection)
                return null;
            else
                return collection;
        }

        /// <summary>
        /// 获取上传默认文件（第1个文件）
        /// </summary>
        /// <returns>如果不存在则返回null</returns>
        protected HttpPostedFile UploadDefaultFile(HttpContext context,out string fileName)
        {
            fileName = "";
            var defaultFile = UploadDefaultFile(context);
            if (null == defaultFile)
            {
                return null;
            }
            else
            {
                fileName = defaultFile.FileName;
                return defaultFile;
            }
        }
    }
}