using System;
using System.IO;
using Microsoft.VisualStudio.TestTools.UnitTesting;
using CPF;
using CPF.FileTransfer;
using CPF.PosixClient;
using System.Text;
using Microsoft.SPOT;
using System.Threading;

namespace CPFUnitTests
{
    [TestClass]
    public class UnitTestIridiumRUDICS
    {

        /// <summary>
        /// Test zmodem send using the bluetooth serial port, but plug it into a linux tty login.
        /// if no login is provided, the attempt should fail gracefully. 
        /// </summary>
        /// 
       
        private static int utcount;
        [TestMethod]
        public void TestIridiumDD_BidirectionalTransfer()
        {
            Init();
            int resp = 0;
            bool carrier = false;

            IridiumPosixSession session = new IridiumPosixSession();

            session.Username = "cpfloat";
            session.Password = "mbari!@!123";
            session.LoginPrompt = "login:";
            session.PasswordPrompt = "Password:";
            session.CommandPrompt = "$ ";
            utcount++;

            //Connect
            IModem.SelectBearerServiceType(IModem.CallSpeed.BPS9600V110);
            Thread.Sleep(1000); // enough time for the cbst message to come in
            CPF.Program.processStructQ();
            IModem.sendCSQ();
            Thread.Sleep(10000);
            CPF.Program.processStructQ();


            byte[] baRUDICSnumber = Encoding.UTF8.GetBytes("T00881600005391");
            //byte[] baRUDICSnumber = Encoding.UTF8.GetBytes("+18317751862");
            Debug.Print("Dialing");
            resp = session.Connect(baRUDICSnumber);
            if (resp < 0) goto failed;
            
            carrier = true;

            //Login
            resp = session.Login();
            if (resp == (int)PosixSession.ERROR.NOCARRIER)
            {
                carrier = false;
                goto failed;
            }
            //Delete File if its there already
            //session.SendCommand("rm graph.pdf\r");
            
            //Send a Message to Broadcast
            StringBuilder utmsg = new StringBuilder("I am UNIT TEST #: ");
            utmsg.Append(utcount.ToString());

            session.Broadcast(utmsg.ToString());
            goto done;
            //Send File
            resp = session.ZModemSendTransaction("\\SD\\graph.pdf");
            if (resp < 0) goto done;

            //Receive File

            //Delete Local File 
            try
            {
                if (File.Exists("\\SD\\manifest.txt"))
                    File.Delete("\\SD\\manifest.txt");
            }
            catch { goto done; }

            resp = session.CheckForPrompt();
            if (resp < 0) goto done;

            resp = session.ZModemReceiveTransaction("/home/rawa/manifest.txt", "\\SD\\");
            if (resp < 0) goto done;

        done:
            //Logout
            session.Logout();
        failed:
            //Shut down the session.
            session.Disconnect();

            
            // Hang up the call
            
            bool bRUDICSThreadRunning = true;

            if (!carrier)
                return;

            bool bEscapeReceived = false;
            int iAttempts = 0;
            while (bRUDICSThreadRunning && iAttempts < 10)
            {
                CPF.Program.processStructQ();

                if (!bEscapeReceived)
                    resp = IModem.waitForResponse(IModem.commands.escapeSeq);
                else
                    resp = IModem.waitForResponse(IModem.commands.chup);
                if (resp == 0)
                {
                    Thread.Sleep(10);
                    continue;
                }
                else if (resp == 1)
                {
                    Debug.Print("Response from IModem");
                    bRUDICSThreadRunning = false;
                    if (!bEscapeReceived)
                        bEscapeReceived = true;
                    else
                        bRUDICSThreadRunning = false;
                }
                else
                {
                    Debug.Print("No Reponse from IModem");
                    bEscapeReceived = true; //this will automatically alternate which messsage is sent. Sometimes the connection is dropp and the +++ doesn't return an OK
                    iAttempts++;
                }
            }
            if (iAttempts == 10) Assert.Fail();

            for (int i = 0; i < 6; i++)
            {
                Debug.Print("Cleanup: "+i.ToString());
                CPF.Program.processStructQ();
                Thread.Sleep(1000);
            }



        }

        static bool runonce = false;
        public void Init()
        {
            if (!runonce)
            {
                runonce = true;
                Debug.Print("Initializing Iridium Modem");
                IModem.init();
            }
        }
    }
}