using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using SafeMobileLib;
using System.IO;

namespace AppServer
{
    class VoiceRecording
    {
        private string ip;
        private int port;
        private UdpMulticast udp4VoiceRecv;
        private bool isRecording;

        public bool IsRecording
        {
            get { return isRecording; }
            set { isRecording = value; }
        }
        private MemoryStream recStream;
        private string fileDir;
        System.Timers.Timer backUPTimer;
        private DBrecordingsManager DBrec;

        private int gwID;
        private int radioGWid;
        private int typeSD;
        private Int32 callType;
        
        private UdpMulticast udp_multi;
        private int sampleRate = 8000;
        private int bitdepth = 16;

        public int? dispatcher_id;
        public int? subs_imei;
        private int? group_cpsid;

        private DateTime dtStart;

        public VoiceRecording(string ip, int voicePort, int gwID, int radiogwID, int? dispatcherId,  int? subs_imei, int? group_cpsid, int typeSD, Int32 callType, UdpMulticast udp_multi,  int sampleRate, int bitdepth)
        {
            this.ip = ip;
            this.port = voicePort;
            this.gwID = gwID;
            this.radioGWid = radiogwID;

            this.dispatcher_id = dispatcherId;
            this.subs_imei = subs_imei;
            this.group_cpsid = group_cpsid;

            
            this.typeSD = typeSD;
            this.callType = callType;
            
            this.udp_multi = udp_multi;
            this.sampleRate = sampleRate;
            this.bitdepth = bitdepth;


            fileDir = @"recordings";
            DirectoryInfo dir = new DirectoryInfo(fileDir);
            if (!Directory.Exists(fileDir))
            {
                dir.Create();
            }
            DBrec = new DBrecordingsManager(Program.cfg.DB_IP, Program.cfg.DB_schema, Program.cfg.DB_user, Program.cfg.DB_passwd, Program.cfg.DB_port);
            
            SM.Debug("Starting voice recording for " + ip);
            udp4VoiceRecv = new UdpMulticast(ip, port);
            udp4VoiceRecv.OnNewDataRecv += new UdpMulticast.newData4Send(udp4VoiceRecv_OnNewDataRecv);        
        
            backUPTimer = new System.Timers.Timer();
            backUPTimer.Interval = 60000;
            backUPTimer.Elapsed += new System.Timers.ElapsedEventHandler(backUPTimer_Elapsed);
        }

        void backUPTimer_Elapsed(object sender, System.Timers.ElapsedEventArgs e)
        {
            SM.Debug("backup timer expired(60sec) ... force stoping voice recording");
            Stop();
        }

        void udp4VoiceRecv_OnNewDataRecv(byte[] data, int dataLen)
        {
            if (isRecording)
            {
                Console.WriteLine("datalen="+dataLen);
                if (dataLen > 0)
                {
                    recStream.Write(data, 0, dataLen);
                }
            }
        }

        public void Start()
        {
            udp4VoiceRecv.StartListen_ThreadPool();

            recStream = new MemoryStream();
            isRecording = true;
            backUPTimer.Enabled = true;
            dtStart = DateTime.Now;
        }

        private string test;
        

        public void Stop()
        {
            try
            {
                backUPTimer.Enabled = false;
                udp4VoiceRecv.StopListen();
                SM.Debug("Recording stoped... dumping memory stream in to file; len=" + recStream.ToArray().Length);

                if (recStream.ToArray().Length == 0)
                {
                    SM.Debug("Nothing to write. Returning");
                    return;
                }

                if (MainForm.recordings == 0)
                {
                    SM.Debug("No recordings license. Returning");
                    return;
                }

               
                Int32 call_type = GetCallType(); // 0-private 1-group 2-all call 3-users voice call from dispacher
                                                 // 4-private 5 -group 6 -all call 


                string ending = ".wav";
                string endRepeater = ".amb";

                //format the name of the recording
                string filename = FormatFileName();
                filename = filename.Replace(' ', '_');
                

                //if we got some data save it 2 file
                if (recStream.Length > 0)
                {
                    string fileName = fileDir + "/" + filename + ending;
                    string fileNameDB = fileName;
                    
                    if ((MulticastListener.GatewayList[gwID] != null) && ((Boolean)MulticastListener.GatewayList[gwID]))                    
                        fileName = fileDir + "/" + filename + endRepeater;

                    using (FileStream fs1 = new FileStream(fileName, System.IO.FileMode.Create))
                    {
                        if (!((MulticastListener.GatewayList[gwID] != null) && ((Boolean)MulticastListener.GatewayList[gwID])))                        
                        {
                            WriteHeader(fs1, recStream.ToArray().Length, 1, sampleRate, bitdepth);
                        }

                        System.IO.BinaryWriter bw = new BinaryWriter(fs1);
                        bw.Write(recStream.ToArray());
                        bw.Close();
                    }
                    
                    // trigger event when a recording was received from the repeater
                    if ((MulticastListener.GatewayList[gwID] != null) && ((Boolean)MulticastListener.GatewayList[gwID]))
                        OnRecordingFileWritteen(fileName);

                    // add to db
                    Recording rec = new Recording(dtStart.GetSecondsLocalFromDT() * 1000000 + DateTime.Now.Millisecond * 1000, dtStart.GetSecondsLocalFromDT(), DateTime.Now.GetSecondsLocalFromDT(), dtStart, DateTime.Now, fileNameDB, subs_imei, gwID, radioGWid, typeSD, call_type, group_cpsid, dispatcher_id);
                    
                    DBrec.addRecording(rec);


                    test = $"#155#{rec.id}#{rec.hddLocation}#{rec.gwID}#{rec.radioGWID}#{rec.group_cpsId}#{rec.subs_imei}#{rec.startTime}#{rec.endTime}#{rec.typeSD}#{rec.calltype}#{rec.dispatcher_id}#";

                    byte[] dataToSend = Utils.Convert_text_For_multicast("#0.0" + test);
                    MainForm.udp.Send(dataToSend, dataToSend.Length);                                         
                }
            }
            catch (Exception ex)
            {
                SM.Debug(ex.ToString());
            }
            finally
            {
                backUPTimer.Close();
                recStream.Flush();
                isRecording = false;
            }
        }

        private int GetCallType()
        {
            int call_type = 0;

            if (typeSD == 0)
            {
                if (callType == 162)
                    call_type = 7;
                else
                {

                    switch (callType)
                    {
                        case 101 /*AllCall*/:
                            call_type = 6;
                            break;
                        case 102 /* Private call */:
                            call_type = 4;
                            break;
                        case 103 /* Group call */:
                            call_type = 5;
                            break;
                    }
                }
            }

            if (typeSD == 1)
            {
                switch (callType)
                {
                    case 201:
                        call_type = 3;
                        break;
                    case 101:
                        call_type = 2;
                        break;
                    case 102:
                        call_type = 0;
                        break;
                    case 103:
                        call_type = 1;
                        break;
                }
            }

            return call_type;
        }
        private string FormatDispatcherRadioFileName()
        {
            string filename = string.Empty;
            string tmp = "";

            if (typeSD == 1)
            {
                switch (callType)
                {
                    case 201:
                        tmp = "";
                        if (MulticastListener.UserList[radioGWid] != null)
                            tmp = "_" + MulticastListener.UserList[radioGWid] + "_";
                        else
                            tmp = "_UserID(" + radioGWid.ToString() + ")_";

                        if (MulticastListener.UserList[dispatcher_id] != null)
                            filename = MulticastListener.UserList[dispatcher_id] + "_CALL_USER_TO" + tmp + DateTime.Now.ToString("dd_MMM_yy_HH_mm_ss");
                        else
                            filename = "UserID(" + dispatcher_id.ToString() + ")_CALL_USER_TO" + tmp + DateTime.Now.ToString("dd_MMM_yy_HH_mm_ss");
                        break;

                    case 101:                       // dispatcher - radio (all call)
                        if (MulticastListener.UserList[dispatcher_id] != null)
                            filename = MulticastListener.UserList[dispatcher_id] + "_ALLCALL_" + DateTime.Now.ToString("dd_MMM_yy_HH_mm_ss");
                        else
                            filename = "UserID(" + dispatcher_id.ToString() + ")_ALLCALL_" + DateTime.Now.ToString("dd_MMM_yy_HH_mm_ss");
                        break;

                    case 102:                       // dispatcher - radio (private call)
                        tmp = "";

                        if (MulticastListener.VehicleList[subs_imei.ToString()] != null)
                            tmp = "_" + MulticastListener.VehicleList[subs_imei.ToString()] + "(" + subs_imei.ToString() + ")_";
                        else
                            tmp = "_RadioID(" + subs_imei.ToString() + ")_";

                        if (MulticastListener.UserList[dispatcher_id] != null)
                            filename = MulticastListener.UserList[dispatcher_id] + "_PRIVATE_CALL_TO" + tmp + DateTime.Now.ToString("dd_MMM_yy_HH_mm_ss");
                        else
                            filename = "UserID(" + dispatcher_id.ToString() + ")_PRIVATE_CALL_TO" + tmp + DateTime.Now.ToString("dd_MMM_yy_HH_mm_ss");

                        break;

                    case 103:               // dispatcher - radio (group call) 
                        if (MulticastListener.UserList[(int)dispatcher_id] != null)
                            filename = MulticastListener.UserList[(int)dispatcher_id] + "_GROUP_CALL_" + dispatcher_id.ToString() + "_" + DateTime.Now.ToString("dd_MMM_yy_HH_mm_ss");
                        else
                            filename = "UserID(" + dispatcher_id.ToString() + ")_GROUP_CALL_" + group_cpsid.ToString() + "_" + DateTime.Now.ToString("dd_MMM_yy_HH_mm_ss");

                        break;
                }
            }

            return filename.Trim();
        }

        private string FormatRadioDispatcherFileName()
        {
            string filename = string.Empty;

            if (typeSD == 0)
            {

                if (callType == 162)      //  Remote monitor
                {
                    if (MulticastListener.VehicleList[subs_imei.ToString()] != null)
                        filename = "Remote monitor " + MulticastListener.VehicleList[subs_imei.ToString()] + "(" + subs_imei.ToString() + ")" + DateTime.Now.ToString("dd_MMM_yy_HH_mm_ss");
                    else
                        filename = "Remote monitor RadioID(" + subs_imei.ToString() + ") " + DateTime.Now.ToString("dd_MMM_yy_HH_mm_ss");
                }
                else
                {
                    if (callType == 103)
                    {
                        if (MulticastListener.VehicleList[subs_imei.ToString()] != null)
                            filename = MulticastListener.VehicleList[subs_imei.ToString()] + "(" + subs_imei.ToString() + ")" + "_DO_GROUP_CALL_ID_" + group_cpsid.ToString() + "_" + DateTime.Now.ToString("dd_MMM_yy_HH_mm_ss");
                        else
                            filename = "RadioID(" + subs_imei.ToString() + ")_DO_GROUP_CALL_ID_" + group_cpsid.ToString() + "_" + DateTime.Now.ToString("dd_MMM_yy_HH_mm_ss");
                    }
                    else if (callType == 102)           // radio - dispatcher ( private call)
                    {
                        if (MulticastListener.VehicleList[subs_imei.ToString()] != null)
                            filename = MulticastListener.VehicleList[subs_imei.ToString()] + "(" + subs_imei.ToString() + ")" + "_DO_A_PRIVATE_CALL_";
                        else
                            filename = "RadioID(" + subs_imei.ToString() + ")_DO_A_PRIVATE_CALL_";

                        if (MulticastListener.VehicleList[dispatcher_id.ToString()] != null)
                            filename += MulticastListener.VehicleList[dispatcher_id.ToString()] + "(" + dispatcher_id.ToString() + ")" + DateTime.Now.ToString("dd_MMM_yy_HH_mm_ss");
                        else
                            filename += "RadioID(" + dispatcher_id.ToString() + ")" + DateTime.Now.ToString("dd_MMM_yy_HH_mm_ss");
                    }
                    else if (callType == 101)        // radio - dispatcher ( all call)
                    {

                        if (MulticastListener.VehicleList[subs_imei.ToString()] != null)
                            filename = MulticastListener.VehicleList[subs_imei.ToString()] + "(" + subs_imei.ToString() + ")" + "_DO_ALL_CALL_" + DateTime.Now.ToString("dd_MMM_yy_HH_mm_ss");
                        else
                            filename = "RadioID(" + subs_imei.ToString() + ")_DO_ALL_CALL_" + DateTime.Now.ToString("dd_MMM_yy_HH_mm_ss");
                    }
                }
            }

            return filename.Trim();
        }

        private string FormatFileName()
        {
            if (typeSD == 0)
                return FormatRadioDispatcherFileName();

            return FormatDispatcherRadioFileName();
            
        }
        
        public static void WriteHeader(
             System.IO.Stream targetStream,
             int byteStreamSize,
             int channelCount,
             int sampleRate,
             int bitdepth)
        {
            bool isFloatingPoint = false;
            targetStream.Position = 0;

            // RIFF header.
            // Chunk ID.
            targetStream.Write(Encoding.ASCII.GetBytes("RIFF"), 0, 4);

            // Chunk size.
            targetStream.Write(BitConverter.GetBytes(((bitdepth / 8) * byteStreamSize) + 36), 0, 4);

            // Format.
            targetStream.Write(Encoding.ASCII.GetBytes("WAVE"), 0, 4);

            // Sub-chunk 1.
            // Sub-chunk 1 ID.
            targetStream.Write(Encoding.ASCII.GetBytes("fmt "), 0, 4);

            // Sub-chunk 1 size.
            targetStream.Write(BitConverter.GetBytes(16), 0, 4);

            // Audio format (floating point (3) or PCM (1)). Any other format indicates compression.
            targetStream.Write(BitConverter.GetBytes((ushort)(isFloatingPoint ? 3 : 1)), 0, 2);

            // Channels.
            targetStream.Write(BitConverter.GetBytes(channelCount), 0, 2);

            // Sample rate.
            targetStream.Write(BitConverter.GetBytes(sampleRate), 0, 4);

            // Bytes rate.
            targetStream.Write(BitConverter.GetBytes(sampleRate * channelCount * (bitdepth / 8)), 0, 4);

            // Block align.
            targetStream.Write(BitConverter.GetBytes((ushort)channelCount * (bitdepth / 8)), 0, 2);

            // Bits per sample.
            targetStream.Write(BitConverter.GetBytes(bitdepth), 0, 2);

            // Sub-chunk 2.
            // Sub-chunk 2 ID.
            targetStream.Write(Encoding.ASCII.GetBytes("data"), 0, 4);

            // Sub-chunk 2 size.
            targetStream.Write(BitConverter.GetBytes((bitdepth / 8) * byteStreamSize), 0, 4);
        }
        
        public delegate void RecordingFileWritteenDEl(string filePath);
        public event RecordingFileWritteenDEl OnRecordingFileWritteen;
    }
}