using Sensus.iPerl.RfidCom.Exceptions;
using Sensus.iPerl.RfidCom.Helper;
using Sensus.iPerl.RfidCom;
using System;
using System.Text.RegularExpressions;
using System.Threading;
using log4net;

namespace TBF.Rig.TestMethods.iPerlCommunication.iPerlHead
{
    internal class RfidServices
    {
        protected static readonly ILog rfidDataLogger = LogManager.GetLogger("RfidData");
        private static readonly ILog log = LogManager.GetLogger(typeof(iPerlCommunicationForm));

        internal static int ReadRequest(TestMethodCfg cfg, IperlHead iperlHead, MessageID messageID, int offset, int length, out byte[] buffer)
        {
            for (int i = 0; i < cfg.MaxCommRetries; i++)
            {
                rfidDataLogger.Error($"{iperlHead.CommInterface} Start {i} reading: COM{iperlHead.RfidComPortNr}: ReadRequestPort ({messageID},{offset}, {length}... timeout {cfg.CommTimeout})");
                using (RfidLogic writer = new RfidLogic($"COM{iperlHead.RfidComPortNr}"))
                {
                    try
                    {
                        byte[] response = writer.ReadRequest((byte)messageID, offset, length, cfg.CommTimeout);
                        string hexString = RfidHelper.ConvertByteArrayToHexString(response);
                        string swapHexString = RfidHelper.SwapHexcode(hexString);
                        string decString = RfidHelper.HexLiteral2Unsigned(RfidHelper.SwapHexcode(hexString)).ToString();

                        if (length > 10)
                        {
                            //if the result only contains "00"s we are working on the wrong COM port 
                            // or the module just isn't connected
                            if (Regex.IsMatch(hexString, @"^(00)\1+$"))
                            {
                                rfidDataLogger.Error($"COM{iperlHead.RfidComPortNr}: ReadRequestPort ({messageID},...) <- Error: No RFID signal.");
                                throw new RfidValidationException("Error_Rfid_NoSignal");
                            }

                            //if the result only contains "03"s the meter did not answer.
                            // Might be due to the module being positioned incorrectly.
                            if (Regex.IsMatch(hexString, @"^(03)\1+$"))
                            {
                                rfidDataLogger.Error($"COM{iperlHead.RfidComPortNr}: ReadRequestPort ({messageID},...) <- Error: No meter signal.");
                                throw new RfidValidationException("Error_Rfid_NoAnswerFromMeter");
                            }
                        }

                        writer.ClosePort();
                        buffer = response;
                        rfidDataLogger.Info($"{iperlHead.Name} ({iperlHead.SerialNr}): ReadRequestPort(COM{iperlHead.RfidComPortNr},...) returned HEX: {hexString}; SwapHexCodeToDecimal: {decString}");
                        return 0;
                    }
                    catch (RfidDataNotAvailableException)
                    {
                        if (/*RfidHelper.IsPassThrough(messageID)*/ messageID == MessageID.ASICRegisterReadTest || messageID == MessageID.RadioPassthrough)
                        {
                            rfidDataLogger.Info($"COM{iperlHead.RfidComPortNr}: ReadRequestPort ({messageID},...) {(i > 0 ? "<- Error: Invalid Pass-Through data." : "<- Info: Wait for Pass-Through data.")}");
                            Thread.Sleep(cfg.PassThroughWaitTime);
                        }
                        else
                        {
                            Thread.Sleep(cfg.WaitTimeAfterFailure);
                        }
                    }
                    catch (RfidValidationException)
                    {
                        Thread.Sleep(cfg.WaitTimeAfterFailure);
                    }
                    catch (Exception ex)
                    {
                        rfidDataLogger.Error($"COM{iperlHead.RfidComPortNr}: ReadRequestPort ({messageID},...) {ex.Message}");
                        Thread.Sleep(cfg.WaitTimeAfterFailure);
                    }
                }
            }
            rfidDataLogger.Error($"{iperlHead.CommInterface} reading failed after {cfg.MaxCommRetries} retries: COM{iperlHead.RfidComPortNr}: ReadRequestPort ({messageID},...)");
            log.Error($"{iperlHead.CommInterface} reading failed after {cfg.MaxCommRetries} retries: COM{iperlHead.RfidComPortNr}: ReadRequestPort ({messageID},...)");
            buffer = new byte[length];
            return 3;
        }

        internal static int WriteRequest(TestMethodCfg cfg, IperlHead iperlHead, MessageID messageID, int offset, int length, byte[] buffer)
        {
            RfidLogic writer = new RfidLogic($"COM{iperlHead.RfidComPortNr}");
            string payload = RfidHelper.ConvertByteArrayToHexString(buffer);

            for (var i = 0; i < cfg.MaxCommRetries; i++)
            {
                rfidDataLogger.Error($"{iperlHead.CommInterface} Start {i} writting: COM{iperlHead.RfidComPortNr}: WriteRequest ({messageID},{offset}, {length}, {payload}... timeout {cfg.CommTimeout})");
                try
                {
                    if (writer.ClosePort()) writer.OpenPort();
                    writer.WriteRequest((byte)messageID, offset, length, buffer, cfg.CommTimeout, false);
                    writer.ClosePort();
                    rfidDataLogger.InfoFormat($"{iperlHead.Name}({iperlHead.SerialNr},COM{iperlHead.RfidComPortNr}): WriteRequestPort({messageID}, {offset}, {length}, {payload})");
                    return 0;
                }
                catch (Exception ex)
                {
                    if (messageID == MessageID.RadioPassthrough || messageID == MessageID.ASICRegisterReadTest)
                    {
                        Thread.Sleep(1500);
                    }
                    else
                    {
                        rfidDataLogger.Error($"COM{iperlHead.RfidComPortNr}: Error: {ex.Message}");
                        Thread.Sleep(cfg.WaitTimeAfterFailure);
                        if (i > 1)
                        {
                            rfidDataLogger.Error($"COM{iperlHead.RfidComPortNr}: Reopen the com port.");
                            writer.ClosePort();
                        }
                    }
                }
            }
            writer.ClosePort();
            rfidDataLogger.Error($"RFID writing failed after {cfg.MaxCommRetries} retries: COM{iperlHead.RfidComPortNr}: WriteRequestPort ({messageID},...) {System.Text.Encoding.UTF8.GetString(buffer)}");
            log.Error($"RFID writing failed after {cfg.MaxCommRetries} retries: COM{iperlHead.RfidComPortNr}: WriteRequestPort ({messageID},...) {System.Text.Encoding.UTF8.GetString(buffer)}");
            return 2;
        }
    }
}