using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using EMISOnline.WinService.Common;
using System.IO;
using System.Diagnostics;

namespace EMISOnline.WinService
{
    public class M3u8Timer
    {
        public M3u8Timer()
        {
        }

        public void doingM3u8()
        {
            Log.Info(this.GetType().ToString(), "Start m3u8...");
            //获取所有可以转换的文件
            string convertPath = "", Comments = "";
            List<FileInfo> lists = FileHelper.GetAllFiles(Config.FtpPath,Config.FtpFileType);
            foreach (FileInfo file in lists)
            {
                Comments = FileHelper.GetFilePropertiesComments(file.FullName);
                if (string.IsNullOrEmpty(Comments)) Comments = "";

                //已经标识为上传完成的文件,且没有转换过的文件才进行转换。
                if (Comments.IndexOf("UploadOver") < 0 || Comments.IndexOf("ConvertM3u8") >= 0) continue;

                //每次时序 只转换一个文件，转换完成释放时序。
                convertPath = file.FullName;
                break;
            }
            //没有需要转换的文件
            if (convertPath.Length == 0) return;

            //开始进行 m3u8转换
            string m3u8Path = "";
            string[] comArys = Comments.Split('|');
            //为m3u8创建文件夹
            if (comArys.Length == 1)
            {
                m3u8Path = Config.M3U8Path + "\\" + DateTime.Now.ToString("yyyyMMdd") + "\\" + DateTime.Now.Ticks.ToString();
                if (!Directory.Exists(m3u8Path))//若文件夹不存在则新建文件夹  
                {
                    Directory.CreateDirectory(m3u8Path); //新建文件夹  
                }
                //把该文件对应的m3u8文件路径保存起来
                Comments += "|" + m3u8Path;
                FileHelper.SaveFilePropertiesComments(convertPath, Comments);
            }
            else m3u8Path = comArys[1];

            Log.Info(this.GetType().ToString(), "Find File:" + convertPath + "。try to Convert。M3u8Path:" + m3u8Path);

            //通知教学平台有这样的一个文件正在进行m3u8转换
            M3u8Timer.SaveFtpFile(convertPath, m3u8Path + "\\x.m3u8", "", "", "", 2);


            //开始进行转换
            runJpg(convertPath, m3u8Path + "\\x.jpg");
            runM3u8(convertPath, m3u8Path + "\\x.m3u8");

            //保存状态，下次将不在进行转换检查
            Comments += "|ConvertM3u8";
            FileHelper.SaveFilePropertiesComments(convertPath, Comments);

            //通知教学平台有这样的一个文件m3u8转换完成
            string m3u8Url = Config.M3u8Server + m3u8Path.Replace(Config.M3U8Path, "").Replace("\\","/")+"/x.m3u8";
            M3u8Timer.SaveFtpFile(convertPath, "", "", m3u8Url , "", 3);
        }

        public bool runM3u8(string sourcePath, string mPath)
        {
            string cmd = string.Format(" -i \"{0}\" -c:v libx264 -c:a aac -strict -2  -hls_list_size 0 -f hls \"{1}\"", sourcePath, mPath);
            Log.Info(this.GetType().ToString(), "RunCmd: " + cmd);

            cmd = RunCmd(cmd);
            if (cmd == "-1")
            {
                return false;
            }

            return true;
        }
        public bool runJpg(string sourcePath, string mPicPath)
        {
            string cmd = string.Format(" -i \"{0}\" -f image2 -ss 1 -vframes 1 \"{1}\"", sourcePath, mPicPath);
            Log.Info(this.GetType().ToString(), "RunCmd: " + cmd);

            cmd = RunCmd(cmd);
            if (cmd == "-1")
            {
                return false;
            }

            return true;
        }

        public string RunCmd(string cmdStr)
        {
            try
            {
                using (Process p = new Process())
                {
                    p.StartInfo.FileName = Config.FfmpegExe+"\\bin\\ffmpeg.exe";//要调用外部程序的绝对路径
                    p.StartInfo.Arguments = cmdStr;//参数(这里就是FFMPEG的参数了)
                    p.StartInfo.UseShellExecute = false;//不使用操作系统外壳程序启动线程(一定为FALSE,详细的请看MSDN)
                    p.StartInfo.RedirectStandardError = true;//把外部程序错误输出写到StandardError流中(这个一定要注意,FFMPEG的所有输出信息,都为错误输出流,用StandardOutput是捕获不到任何消息的...这是我耗费了2个多月得出来的经验...mencoder就是用standardOutput来捕获的)
                    p.StartInfo.CreateNoWindow = false;//不创建进程窗口
                    p.ErrorDataReceived += new DataReceivedEventHandler(Output);//外部程序(这里是FFMPEG)输出流时候产生的事件,这里是把流的处理过程转移到下面的方法中,详细请查阅MSDN
                    p.OutputDataReceived += new DataReceivedEventHandler(Output);
                    p.Start();//启动线程
                    p.BeginErrorReadLine();//开始异步读取
                    //p.BeginOutputReadLine();

                    p.WaitForExit();//阻塞等待进程结束
                    p.Close();//关闭进程
                    p.Dispose();//释放资源

                    return "0";
                }
            }
            catch (Exception ex)
            {
                Log.Info(this.GetType().ToString(),"RunCmd error: " + ex.Message + ex.StackTrace);
            }
            return "-1";
        }
        private void Output(object sendProcess, DataReceivedEventArgs output)
        {
            if (!String.IsNullOrEmpty(output.Data))
            {
                Log.Info(this.GetType().ToString(), "RunCmd: " + output.Data);
            }
        }

        public static string SaveFtpFile(string FTPPath, string M3u8Path, string FTPUrl, string M3u8Url, string Name, int Status)
        {
            string param = "FTPPath=" + FTPPath;
            param += "&M3u8Path=" + M3u8Path;
            param += "&FTPUrl=" + FTPUrl;
            param += "&M3u8Url=" + M3u8Url;
            param += "&Name=" + Name;
            param += "&Status=" + Status.ToString();

            return HttpHelper.PostWebRequest(Config.DataServer + "/FtpFile/SaveFtpFile", param, Encoding.UTF8);
        }
    }
}