using System;
using System.IO.Ports;
using System.Threading.Tasks;
using NfcC7_DLL.NfcHandler.Protocols;
using NfcC7_DLL.NfcHandler.Utils;

namespace NfcC7_DLL.NfcHandler
{
    public class OptoHeadService
    {
    
        public class Con
        {
            public string com = "COM5";
            public int baudrate = 38400;
            public int dataBits = 8;
            public Parity parity = Parity.None;
            public StopBits stopbits = StopBits.Two;
            public int readTimeout = 5000;
            public int writeTimeout = 1000;
        }

        private Con Connection { get; set; }
        private SERIAL_Driver driver;
        /// <summary>
        /// Filed After Run() is called.
        /// </summary>
        public WaterMetrologyData WaterMetrologyData { get; private set; }

        public OptoHeadService(Con con)
        {
            Connection = con;
            driver = new SERIAL_Driver();
        }

        public bool CreateSerialConnection()
        {
            bool isopen = false;
            Con con = Connection;
        
            byte[] message = {0x00};
            byte[] bytesReceived;

            if (!driver.isOpen())
            {

                isopen = driver.OpenConnection(
                    con.com,
                    con.baudrate,
                    con.dataBits,
                    con.parity,
                    con.stopbits,
                    con.readTimeout,
                    con.writeTimeout);
            }

            return isopen;
        }
    
        public void CloseSerialConnection()
        {
            dissableRunLoop = true;
            driver.Close();
        }

        public void RunLoop()
        {
            Task.Run(() => Run());
        }


        private bool dissableRunLoop = false;
        /// <summary>
        /// Run the service. Catch one communication to WaterMetrologyData field.
        /// </summary>
        public void Run()
        {
            while (!dissableRunLoop)
            {
                WaterMetrologyData = ParseData(RunReading());    
            }
        
        }
    
        byte[] RunReading()
        {
            if (driver.isOpen())
            {
                driver.SendMessage(new byte[] {0x00}, 1);
                return driver.GetRawData();     
            }
            else
            {
                dissableRunLoop = true;
            }

            return new byte[] {0xFF};
        }

        public WaterMetrologyData ParseData(byte[] data)
        {
            try
            {
                return WaterMetrologyData.Parse(data, DateTime.Now, "");
            }catch(Exception e)
            {
                return null;
            }
        }
    }
}