using System;
using System.Collections.Generic;
using System.Text;
using System.Net;
using System.Net.Sockets;

using System.Threading;
using SafeNetLib;

namespace MotoTRBO_SOC
{

    public class SendSMSThread
    {

        int remoteSMSport;
        public SendSMSThread(int p_remoteSMSport)
        {
            remoteSMSport = p_remoteSMSport;
        }

        public void HandleConnection()
        {
            while (MotoTRBO_GW.running)
            {
                try
                {
                    //MotoTRBOcmdMsg msg = MotoTRBOGW.locationQueue.GetItem(100);
                    SMSmsg msg = SN_Queues.sendSMSQueue.GetItem(-1);//block until message is in queue
                    SendSMSmsg(msg);
                    if (msg.req_conf)
                    {
                        //Utils.ConsWrite(DebugMSG_Type.SMS, "Requesting SMS Confirmation!!!!");
                        lock (SN_Queues.waitConfSMSList.SyncRoot)
                        {
                            msg.seq_no = this.sms_seq_id - 1;//-1 because was alraedy incremented for next id
                            msg.waitConfSMSList_time = DateTime.Now;

                            SN_Queues.waitConfSMSList.Add(msg);
                        }
                    }

                    Thread.Sleep(1200);//minimum interval between SMS as per MotoTRBO specs
                }
                catch (Exception ex)
                {
                    Utils.ConsWrite(DebugMSG_Type.always, "Exception in OC4JconnThread:HandleConnection(): \r\n\tData=" +
                        ex.Data + "\r\n\tSource=" +
                        ex.Source + "\r\n\tStackTrace=" +
                        ex.StackTrace + "\r\n\tMessage=" +
                        ex.Message + "\r\n\tInnerException=" +
                        ex.InnerException);
                }
            } // end while (true)
        }

        public bool SendSMSmsg(SMSmsg p_msg)
        {
            try
            {
                Byte[] sendBytes = PackSMS(p_msg.msg, p_msg.req_conf);
                Utils.ConsWrite(DebugMSG_Type.SMS, "««« SMS [" + p_msg.msg + "] to " + p_msg.suid);
                MotoTRBO_GW.smsUDPclient.Send(sendBytes, sendBytes.Length, (new RadioID2IP("12", p_msg.suid)).GetIP(), remoteSMSport);

                if(OnSMSSent != null)
                    OnSMSSent(p_msg.msg, p_msg.suid);
                // update into database

                return true;
            }
            catch (Exception exc)
            {
                Utils.ConsWrite(DebugMSG_Type.always, exc.ToString());
            }

            return false;
        }

        int MAX_SMS_SIZE = 120;
        int MAX_ID_VAL = 100;
        int sms_seq_id = 1;
        Byte[] PackSMS(string msg_body, bool confirm)
        {
            /*
            Byte[] sendBytes = { 
                0x00 , 0x0E ,   // len
                0xE0 ,          // header 1
                0x00 ,          // addr size
                0x88 , 0x04 ,   // header 2,3
                0x41 , 0x00 , 0x64 , 0x00 , 0x67, 0x00 , 0x6A , 0x00, 0x6D , 0x00 //data
                };
             */

            int msg_len = msg_body.Length;
            if (msg_len > MAX_SMS_SIZE)
            {
                msg_len = MAX_SMS_SIZE;
                Utils.ConsWrite(DebugMSG_Type.SMS, "Warning: SMS truncked to " + msg_len);
            }
            if (sms_seq_id > MAX_ID_VAL)
                sms_seq_id = 1;

            if (msg_len > msg_body.Length)
            {
                msg_body = msg_body.Remove(MAX_SMS_SIZE);
            }
            // compute the len
            int len = msg_len;

            len *= 2; // each character is encoded on 2B            
            len += 4; // this is for the headers            
            Byte[] data = new Byte[len + 2]; //+2 for the msg size

            int msb = (len & 0xff00) >> 8;
            data[0] = (byte)(msb & 0x00ff);
            data[1] = (byte)(len & 0x00ff);

            // put the headers
            if (confirm)
            {
                data[2] = 0xe0; // first header
            }
            else
            {
                data[2] = 0xa0; // first header
            }

            data[3] = 0x00; // addr size

            byte lsb_id = (byte)(sms_seq_id & 0x1f);
            data[4] = (byte)(0x80 | lsb_id);
            byte msb_id = (byte)(sms_seq_id & 0x60); // keep bits 6:5
            data[5] = (byte)(msb_id | 0x04);

            for (int i = 0; i < msg_len; i++)
            {
                data[6 + i * 2] = (byte)msg_body[i];
                data[6 + i * 2 + 1] = 0;
            }

            sms_seq_id++;
            //Utils.ConsWrite(DebugMSG_Type.SMS, "SMS packed: " + LocationThread.Byte2String(data, 0, data[1] + 2) + "\n\rSMS_SeQ_ID = " + sms_seq_id);
            return data;
        }

        public delegate void SMSSentDEl(String message, String radioID);
        public event SMSSentDEl OnSMSSent;
    }
}