using System;
using System.Collections.Generic;
using System.Xml;
using System.Xml.Schema;
using System.Xml.Serialization;
using System.IO;
using DTS.Common.Utilities.Logging;
using DTS.Common.Enums.DASFactory;

namespace DTS.DASLib.Service
{
    public class CANModuleConfig : IXmlSerializable
    {
        public string SerialNumber { get; set; } = "";
        public string TestId { get; set; } = "";
        public string TestDescription { get; set; } = "";

        public DFConstantsAndEnums.RecordingMode RecordingMode { get; set; } = DFConstantsAndEnums.RecordingMode.InvalidArmMode;
        public float AAFilterRateHz { get; set; } = 0;
        public double PreTriggerSeconds { get; set; } = 0;
        public double PostTriggerSeconds { get; set; } = 0;

        private readonly Dictionary<int, DASChannel> _channels = new Dictionary<int, DASChannel>();

        private readonly string _fileName;
        public string FileName { get { return _fileName; } }

        public string FirmwareVersion { get; set; } = "";
        public UInt64? MaxEventStorageSpaceInBytes { get; set; } = 0;
        public int ModuleArrayIndex { get; set; } = 0;

        public CANModuleConfig()
        {
        }

        public CANModuleConfig(string fileName)
        {
            const string dasConfigs = "DASConfigs";
            var location = Path.Combine(Path.Combine(Path.GetDirectoryName(System.Reflection.Assembly.GetExecutingAssembly().Location), dasConfigs), fileName);
            _fileName = location;
            if (File.Exists(_fileName))
            {
                try
                {
                    using (StreamReader sr = new StreamReader(_fileName))
                    {
                        ReadXml(System.Xml.XmlReader.Create(sr));
                    }
                }
                catch (Exception ex)
                {
                    APILogger.Log("Problem reading ", _fileName, ex);
                }
            }
        }
        public void SetChannel(CANInputDASChannel channel)
        {
            if (_channels.ContainsKey(channel.ModuleChannelNumber)) { _channels[channel.ModuleChannelNumber] = channel; }
            else { _channels.Add(channel.ModuleChannelNumber, channel); }
        }
        public CANInputDASChannel GetChannel(CANInputDASChannel channel)
        {
            if (_channels.ContainsKey(channel.ModuleChannelNumber)) { return _channels[channel.ModuleChannelNumber] as CANInputDASChannel; }
            else
            {
                _channels.Add(channel.ModuleChannelNumber, channel);
                return channel;
            }
        }
        public XmlSchema GetSchema()
        {
            return (null);
        }
        //
        // Summary:
        //     Generates an object from its XML representation.
        //
        // Parameters:
        //   reader:
        //     The System.Xml.XmlReader stream from which the object is deserialized.
        public void ReadXml(XmlReader reader)
        {
            reader.MoveToContent();
            reader.ReadStartElement("CANModule");
            reader.ReadStartElement("SerialNumber");
            SerialNumber = reader.ReadString();
            reader.ReadEndElement();
            reader.ReadStartElement("TestId");
            TestId = reader.ReadString();
            reader.ReadEndElement();
            reader.ReadStartElement("TestDescription");
            TestDescription = reader.ReadString();
            reader.ReadEndElement();

            reader.ReadStartElement("RecordingMode");
            string recordingMode = reader.ReadString();
            try
            {
                RecordingMode = (DFConstantsAndEnums.RecordingMode)Enum.Parse(typeof(DFConstantsAndEnums.RecordingMode), recordingMode);
            }
            catch (Exception ex) { APILogger.Log("Failed to load RecordingMode ", recordingMode, ex); }
            reader.ReadEndElement();

            reader.ReadStartElement("AAFilterRateHz");
            string aaFilterRateHz = reader.ReadString();
            try
            {
                AAFilterRateHz = (float)Convert.ToDouble(aaFilterRateHz);
            }
            catch (Exception ex) { APILogger.Log("Failed to load AAFilterRateHz ", aaFilterRateHz, ex); }
            reader.ReadEndElement();

            reader.ReadStartElement("PreTriggerSeconds");
            string preTriggerSeconds = reader.ReadString();
            try
            {
                PreTriggerSeconds = Convert.ToDouble(preTriggerSeconds);
            }
            catch (Exception ex) { APILogger.Log("Failed to load PreTriggerSeconds ", preTriggerSeconds, ex); }
            reader.ReadEndElement();

            reader.ReadStartElement("PostTriggerSeconds");
            string postTriggerSeconds = reader.ReadString();
            try
            {
                PostTriggerSeconds = Convert.ToDouble(postTriggerSeconds);
            }
            catch (Exception ex) { APILogger.Log("Failed to load PostTriggerSeconds ", postTriggerSeconds, ex); }
            reader.ReadEndElement();

            reader.ReadStartElement("FirmwareVersion");
            FirmwareVersion = reader.ReadString();
            reader.ReadEndElement();

            reader.ReadStartElement("MaxEventStorageSpaceInBytes");
            string maxEventStorageSpaceInBytes = reader.ReadString();

            double d;
            if (double.TryParse(maxEventStorageSpaceInBytes, out d))
            {
                if (d >= 0 && d < ulong.MaxValue) { MaxEventStorageSpaceInBytes = Convert.ToUInt64(d); }
                else { APILogger.Log("Failed to load MaxEventStorageSpaceInBytes ", maxEventStorageSpaceInBytes); }
            }
            else { APILogger.Log("Failed to load MaxEventStorageSpaceInBytes ", maxEventStorageSpaceInBytes); }

            reader.ReadEndElement();
            ReadModuleArray(reader);

            reader.ReadStartElement("Channels");

            while (reader.MoveToContent() == XmlNodeType.Element)
            {
                CANInputDASChannel cic = new CANInputDASChannel();
                cic.ReadXml(reader);
                SetChannel(cic);
            }

            reader.ReadEndElement();
            reader.ReadEndElement();
        }
        //FB 45086 sonarqube - reduce cyclomatic complexity 
        private void ReadModuleArray(XmlReader reader)
        {
            try
            {
                reader.ReadStartElement("ModuleArrayIndex");
                string moduleArrayIndex = reader.ReadString();

                int m;
                if (int.TryParse(moduleArrayIndex, out m))
                {
                    if (m >= 0 && m < int.MaxValue) { ModuleArrayIndex = Convert.ToInt32(m); }
                    else { APILogger.Log("Failed to load ModuleArrayIndex ", moduleArrayIndex); }
                }
                else { APILogger.Log("Failed to load ModuleArrayIndex ", moduleArrayIndex); }

                reader.ReadEndElement();
            }
            catch
            {
                //This must be an old config file
            }
        }

        //
        // Summary:
        //     Converts an object into its XML representation.
        //
        // Parameters:
        //   writer:
        //     The System.Xml.XmlWriter stream to which the object is serialized.
        public void WriteXml(XmlWriter writer)
        {
            //writer.WriteStartElement   ( attributeExtractor.ExtractAttachedAttributeFromObject  ( this 
            writer.WriteStartElement("CANModule");
            writer.WriteStartElement("SerialNumber");
            writer.WriteString(SerialNumber);
            writer.WriteEndElement();
            writer.WriteStartElement("TestId");
            writer.WriteString(TestId);
            writer.WriteEndElement();
            writer.WriteStartElement("TestDescription");
            writer.WriteString(TestDescription);
            writer.WriteEndElement();

            writer.WriteStartElement("RecordingMode");
            writer.WriteString(RecordingMode.ToString());
            writer.WriteEndElement();

            writer.WriteStartElement("AAFilterRateHz");
            writer.WriteString(AAFilterRateHz.ToString());
            writer.WriteEndElement();

            writer.WriteStartElement("PreTriggerSeconds");
            writer.WriteString(PreTriggerSeconds.ToString());
            writer.WriteEndElement();

            writer.WriteStartElement("PostTriggerSeconds");
            writer.WriteString(PostTriggerSeconds.ToString());
            writer.WriteEndElement();

            writer.WriteStartElement("FirmwareVersion");
            writer.WriteString(FirmwareVersion);
            writer.WriteEndElement();

            writer.WriteStartElement("MaxEventStorageSpaceInBytes");
            writer.WriteString(MaxEventStorageSpaceInBytes.ToString());
            writer.WriteEndElement();

            writer.WriteStartElement("ModuleArrayIndex");
            writer.WriteString(ModuleArrayIndex.ToString());
            writer.WriteEndElement();

            writer.WriteStartElement("Channels");
            writer.Flush();

            foreach (DASChannel channel in _channels.Values)
            {
                channel.WriteElementStart(writer);
                channel.WriteXml(writer);
                channel.WriteElementEnd(writer);
                writer.Flush();
            }
            writer.WriteEndElement();
            writer.WriteEndElement();
            writer.Flush();
        }
        public virtual void WriteElementStart(XmlWriter writer)
        {
            writer.WriteStartElement("CANModule");
            var tgt = GetType();
            writer.WriteAttributeString("xsi", "type", null, tgt.Name);
        }

        public virtual void WriteElementEnd(XmlWriter writer)
        {
            writer.WriteEndElement();
        }
    }
}