using System;
using System.Threading;
using System.IO.Ports;
using System.Text;

using Microsoft.SPOT;
using Microsoft.SPOT.Hardware;

namespace MFConsoleApplication1
{
    public static class Console
    {
        private static char ConsoleTerminatingChar = '\n';
        private static string ConsoleRxString = "";

        public const String BeginCmd = "BG",
                            UploadCmd = "UP",
                            ExitCmd = "EX",
                            Error = "ERROR = ";
   
        private static SerialPort ConsolePort = new SerialPort("COM1", 19200, Parity.None, 8, StopBits.One);
        private static AutoResetEvent ConsoleReadEvent = new AutoResetEvent(false);

        public static int initSerialPort(String PortName)
        {
            ConsolePort.ReadTimeout = 1000;
            ConsolePort.Open();
            ConsolePort.DiscardInBuffer();
            ConsolePort.DiscardOutBuffer();

            ConsolePort.DataReceived += new SerialDataReceivedEventHandler(ConsolePort_DataReceived);
            ConsolePort.ErrorReceived += new SerialErrorReceivedEventHandler(ConsolePort_ErrorReceived);

            return (0);
        }

        public static int initConsole(String PortName)
        {
            initSerialPort(PortName);

            return (0);         //Eventually deal with errors
        }

        public static String readCommand()
        {
            byte[] ConsoleTxBytes = { };
            string consoleCmd = "";
            string consolePrompt = "BG to begin, UP to upload, EX to exit\r\n";

            int errorCode = 0;

            ConsoleTxBytes = Encoding.UTF8.GetBytes(consolePrompt);
            ConsolePort.Write(ConsoleTxBytes, 0, ConsoleTxBytes.Length);

            EngrLog.writeEvent(Program.DateTimeNowMilliSec() + " ,Waiting for Console command");
            if (ConsoleReadEvent.WaitOne(600000, false)) //waiting for notification, 10 minute timeout
            {
                consoleCmd = ConsoleRxString;
            }
            else
            {
                consoleCmd = Error + errorCode.ToString();
                EngrLog.writeEvent(Program.DateTimeNowMilliSec() + " ,Console RD timed out");
            }
            
            return (consoleCmd);
        }

        static public void InvalidCommandReceived(String lineToSend)
        {
            byte[] ConsoleTxBytes = { };

            ConsoleTxBytes = Encoding.UTF8.GetBytes(lineToSend);
            ConsolePort.Write(ConsoleTxBytes, 0, ConsoleTxBytes.Length);
        }

        static public void sendLine(String lineToSend)
        {
            byte[] ConsoleTxBytes = { };

            ConsoleTxBytes = Encoding.UTF8.GetBytes(lineToSend);
            ConsolePort.Write(ConsoleTxBytes, 0, ConsoleTxBytes.Length);
        }

        static void ConsolePort_DataReceived(object sender, SerialDataReceivedEventArgs e)
        {
            char rxChar;

            while (ConsolePort.BytesToRead > 0)
            {
                rxChar = (char)ConsolePort.ReadByte();
                Debug.Print(rxChar.ToString());
                ConsoleRxString = ConsoleRxString + rxChar.ToString();
                if (rxChar == ConsoleTerminatingChar)
                    ConsoleReadEvent.Set();
            }
        }

        static void ConsolePort_ErrorReceived(object sender, SerialErrorReceivedEventArgs e)
        {
            //Eventually
        }

    }
}














/*



using System;
using Microsoft.SPOT;

namespace MFConsoleApplication1
{
    static class Console
    {
        public enum Commands : int
        {
            Error,
            Begin,
            Upload,
            Exit,
            Null,
        }

        static public Commands WaitForCommand()
        {
            bool error = false;

            if (!error)
                return(Commands.Begin);
            else
                return(Commands.Error);
        }


    }
}
*/