/************************************************************************************\
 * CatLog - An SDSG Production                                                     *
\************************************************************************************/

/*! \file		SerialLog.cs
 *  \author		Andrew Shurney
 *  \brief		Logs from a serial port. Sends out data over events.
 */

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.ComponentModel;
using System.Threading;
using System.IO.Ports;
using System.Windows.Forms;

namespace CatLog
{
    class SerialLog
    {
        public String portName;
        SerialPort port = null;

        public delegate void NewDataHandler(String line);
        public delegate void ClearHandler();

        public event NewDataHandler NewData = null;
        public event ClearHandler Clear = null;

        public SerialLog(String portName)
        {
            this.portName = portName;
        }

        public void Start()
        {
            if (IsRunning)
                return;

            port = new SerialPort(portName, 57600, Parity.None, 8, StopBits.One);
            port.Handshake = Handshake.None;
            port.Encoding = Encoding.UTF8;
            port.DataReceived +=new SerialDataReceivedEventHandler(port_DataReceived);

            Reset();

            port.Open();
        }

        void  port_DataReceived(object sender, SerialDataReceivedEventArgs e)
        {
            SerialPort sp = (SerialPort)sender;

            String data = sp.ReadExisting();
            if (NewData != null)
                NewData(data);
        }

        public bool IsRunning
        {
            get
            {
                if (port == null)
                    return false;

                return port.IsOpen;
            }
        }

        public void Stop()
        {
            if (!IsRunning)
                return;

            port.Close();
        }

        public void Reset()
        {
            if (Clear != null)
                Clear();
        }
    }
}