using Common;
using Common.system;

using Newtonsoft.Json.Linq;

using System;
using System.Collections.Generic;
using System.Collections.Specialized;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;

using XHWK.Model;

namespace XHWK.WKTool.DAL
{
    /// <summary>
    /// 上传相关方法
    /// 创建人：赵耀
    /// 创建时间：2020年9月4日
    /// </summary>
    public class DAL_Upload
    {
        string APIRequestAddress = FileToolsCommon.GetConfigValue("APIRequestAddress");
        string FileRequestAddress = FileToolsCommon.GetConfigValue("FileRequestAddress");
        string schoolfileRequestAddress = FileToolsCommon.GetConfigValue("schoolfileRequestAddress");
        /// <summary>
        /// 文件是否允许上传
        /// </summary>
        /// <param name="MD5">MD5</param>
        /// <param name="Message">错误消息</param>
        /// <returns></returns>
        public bool IsAllowUploaded(string MD5, out string Message)
        {
            Exception ex = null;
            Message = "";//请求重试5次 共5秒
            for (int num = 0; num < 5; num++)
            {
                try
                {
                    JObject jo = HttpHelper.PostFunction(FileRequestAddress + @"/chunkdb/isexist", @"application/x-www-form-urlencoded", @"md5=" + MD5, "");
                    //0成功，1失败
                    if (jo["code"].ToString() == "0")
                    {
                        if (string.IsNullOrWhiteSpace(jo["obj"].ToString()))
                        {
                            //不存在 允许上传
                            return true;
                        }
                        else
                        {
                            //已存在 不允许上传
                            return false;
                        }
                    }
                    else
                    {
                        Message = jo["msg"].ToString();
                        return false;
                    }
                }
                catch (Exception e)
                {
                    Message = e.Message;
                    ex = e;
                    Thread.Sleep(1000);
                }
            }
            string ErrMessage = "【文件是否存在】(IsUploaded):请求失败。" + Message;
            LogHelper.WriteErrLog(ErrMessage, ex);
            return false;
        }
        /// <summary>
        /// 上报文件合并指令
        /// </summary>
        /// <param name="Savefolder">保存文件位置  学校id/resource</param>
        /// <param name="FileCode">文件唯一编号 Guid</param>
        /// <param name="Message">错误信息</param>
        /// <returns></returns>
        public bool ReportFileMerge(string Savefolder, string FileCode, out string Message)
        {
            Exception ex = null;
            Message = "";//请求重试5次 共5秒
            for (int num = 0; num < 5; num++)
            {
                try
                {
                    JObject jo = HttpHelper.PostFunction(FileRequestAddress + @"/chunkdb/mergechunk", @"application/x-www-form-urlencoded", @"savefolder=" + Savefolder + "&identifier=" + FileCode, "");
                    //0成功，1失败
                    if (jo["code"].ToString() == "0")
                    {
                        return true;
                    }
                    else
                    {
                        Message = jo["msg"].ToString();
                        return false;
                    }
                }
                catch (Exception e)
                {
                    Message = e.Message;
                    ex = e;
                    Thread.Sleep(1000);
                }
            }
            string ErrMessage = "【上报合并文件】(ReportFileMerge):请求失败。" + Message;
            LogHelper.WriteErrLog(ErrMessage, ex);
            return false;
        }

        /// <summary>
        /// 上传视频
        /// </summary>
        /// <returns></returns>
        public bool UploadVideo(string VideoGuid, out string ErrMessage)
        {
            ErrMessage = "";
            try
            {
                Model_Video VideoInfo = null;
                foreach (Model_WKData Vdata in APP.WKDataList)
                {
                    if (Vdata.VideoList == null)
                        continue;
                    foreach (Model_Video videoinfo in Vdata.VideoList)
                    {
                        if(videoinfo.FileGuid== VideoGuid)
                        {
                            VideoInfo = videoinfo;
                            break;
                        }
                    }
                    if (VideoInfo != null)
                        break;
                }
                if (VideoInfo==null)
                {
                    ErrMessage = "未找到课程！";
                    return false;
                }
                string UploadUrl = FileRequestAddress + "/chunkdb/upchunk";
                if (VideoInfo.IsUpload)
                {
                    ErrMessage = "视频已上传";
                    return false;
                }
                else
                {
                    if (string.IsNullOrWhiteSpace(VideoInfo.FileMD5))
                    {
                        VideoInfo.FileMD5 = AESHelper.AESEncrypt(FileToolsCommon.ReadBigFileStr(VideoInfo.VideoPath, 1024));
                    }
                    if (IsAllowUploaded(VideoInfo.FileMD5, out ErrMessage))
                    {
                        //视频长度
                        long filelen = FileToolsCommon.GetFileSize(VideoInfo.VideoPath);
                        //每片的长度
                        double UploadSliceLenMB = double.Parse(FileToolsCommon.GetConfigValue("UploadSliceLen"));
                        if (VideoInfo.SliceLen == 0)
                        {
                            VideoInfo.SliceLen = (long)(UploadSliceLenMB * 1024 * 1024);
                            VideoInfo.Block = (int)(filelen / VideoInfo.SliceLen + (filelen % VideoInfo.SliceLen > 0 ? 1 : 0));
                        }
                        //已上传长度
                        long len = VideoInfo.Uploaded * VideoInfo.SliceLen;
                        string fileName = FileToolsCommon.GetFileName(VideoInfo.VideoPath);
                        //分块
                        for (; len + VideoInfo.SliceLen < filelen; VideoInfo.Uploaded++)
                        {
                            len = VideoInfo.Uploaded * VideoInfo.SliceLen;
                            //取指定长度的流
                            byte[] byteArray = FileToolsCommon.ReadBigFileSpecifyLength(VideoInfo.VideoPath, len, 102400);
                            //参数
                            NameValueCollection formFields = new NameValueCollection();
                            formFields.Add("identifier", VideoInfo.FileGuid);
                            formFields.Add("chunkNumber", (VideoInfo.Uploaded + 1).ToString());
                            formFields.Add("filename", fileName);
                            formFields.Add("totalchunk", VideoInfo.Block.ToString());
                            formFields.Add("md5", VideoInfo.FileMD5);
                            JObject jo = HttpHelper.UploadRequestflow(UploadUrl, byteArray, fileName, formFields);
                            //0成功，1失败
                            if (jo["code"].ToString() != "0")
                            {
                                ErrMessage = jo["msg"].ToString();
                                return false;
                            }
                        }
                        //合并文件
                        bool isres = ReportFileMerge(APP.UserInfo.Schoolid.ToString() + "/resource", VideoInfo.FileGuid, out ErrMessage);
                        if (isres)
                        {
                            VideoInfo.IsUpload = true;
                            return true;
                        }
                        else
                        {
                            return false;
                        }
                    }
                    else
                    {
                        ErrMessage = "上传失败：" + ErrMessage;
                        return false;
                    }
                }

            }
            catch (Exception ex)
            {
                LogHelper.WriteErrLog("【视频上传】（UploadVideo）视频上传失败：" + ex.Message, ex);
            }
            return false;
        }
    }
}