///
/// Copyright (c) 2018 Sensus Slovensko a.s.
///
using System.IO;
using System.Collections.Generic;
using System.IO.Ports;
using System.Xml.Serialization;
using Common;
using Config.Entities;
using TBF.Rig.Generic;

namespace TBF.Rig.Hart.Common
{
    public class HartCfg : ComponentCfgBase, Generic.IComponentCfg, IParamsProvider
	{
		public static XmlSerializer Serializer = XmlSerializer.FromTypes(new[] { typeof(HartCfg) })[0];
		public override XmlSerializer GetSerializer() { return Serializer; }

        static readonly int[] AllBaudRates = new int[] { 300, 600, 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200 };
        static readonly Parity[] AllParities = new Parity[] { Parity.None, Parity.Even, Parity.Odd };
        static readonly int[] AllDataBits = new int[] { 7, 8 };
        static readonly StopBits[] AllStopBits = new StopBits[] { StopBits.None, StopBits.One, StopBits.OnePointFive, StopBits.Two };
        static readonly Handshake[] AllHandshakes = new Handshake[] { Handshake.None, Handshake.XOnXOff, Handshake.RequestToSend, Handshake.RequestToSendXOnXOff };


        public IComponentCfgCtrl GetControl(IList<Config.Entities.Component> cmpntEntities)
        {
            return new Configs.ParamsProvider.ComponentCfgCtrl(this, null);
        }

		///
		/// Serialized parameters 
		///
		public int ComPortNr;
        public int BaudRate;
        public int DataBits;
        public Parity Parity;
        public StopBits StopBits;
        public Handshake Handshake;

		/// Private parameterless constructor invoked by all other (public) constructors
		HartCfg()
		{
        }

        public HartCfg(string name, IComponentFactory factory)
            : this()
        {
            Name = name;
            Factory = factory;
            ParentName = string.Empty;
            InitializeAll();
        }

        public string ComponentName { get { return Name; } }

        public void InitializeAll()
        {
            ComPortNr = 3;
            BaudRate = 1200;
            DataBits = 8;
            Parity = System.IO.Ports.Parity.Odd;
            StopBits = System.IO.Ports.StopBits.One;
            Handshake = System.IO.Ports.Handshake.None;
        }
        string[] paramNames = new string[]
		{
		    "Com port number",
            "Baud rate",
            "Data bits",
            "Parity",
            "Stop bits",
            "Handshake"
        };
        public string ParamName(int i) { return paramNames[i]; }
        public int ParamsCount() { return paramNames.Length; }

        public ICollection<string> ParamValues(int i)
        {
            IList<string> list = new List<string>();
            switch (i)
            {
                case 1: foreach (var v in AllBaudRates) list.Add(v.ToString());     break;
                case 2: foreach (var v in AllDataBits) list.Add(v.ToString());      break;
                case 3: foreach (var v in AllParities) list.Add(v.ToString());      break;
                case 4: foreach (var v in AllStopBits) list.Add(v.ToString());      break;
                case 5: foreach (var v in AllHandshakes) list.Add(v.ToString());    break;
                default: return null;
            }
            return list;
        }

		public string ToString(int i)
		{
            if (i == -1)
            {
                return string.Format("Com{0}, {1}Bd, {2}-bits, parity={3}, stopBits={4}, {5}",
                                     ComPortNr, BaudRate, DataBits, Parity, StopBits, Handshake);
            }

            switch (i)
            {
                case 0: return ComPortNr.ToString();
                case 1: return BaudRate.ToString();
                case 2: return DataBits.ToString();
                case 3: return Parity.ToString();
                case 4: return StopBits.ToString();
                case 5: return Handshake.ToString();
                default: return string.Empty;
            }
        }


        public CfgUpdateFlags UpdateParam(int i, string strValue)
        {
            switch (i)
            {
                case 0:
                    if (ComPortNr != int.Parse(strValue))
                    {
                        ComPortNr = int.Parse(strValue);
                        return CfgUpdateFlags.RestartRqrd;
                    }
                    else
                    {
                        return CfgUpdateFlags.None;
                    }

                case 1:
                    foreach (var v in AllBaudRates)
                    {
                        if ((strValue == v.ToString()) && (BaudRate != v))
                        {
                            BaudRate = v;
                            return CfgUpdateFlags.RestartRqrd;
                        }
                    }
                    return CfgUpdateFlags.None;

                case 2:
                    foreach (var v in AllDataBits)
                    {
                        if ((strValue == v.ToString()) && (DataBits != v))
                        {
                            DataBits = v;
                            return CfgUpdateFlags.RestartRqrd;
                        }
                    }
                    return CfgUpdateFlags.None;

                case 3:
                    foreach (var v in AllParities)
                    {
                        if ((strValue == v.ToString()) && (Parity != v))
                        {
                            Parity = v;
                            return CfgUpdateFlags.RestartRqrd;
                        }
                    }
                    return CfgUpdateFlags.None;

                case 4:
                    foreach (var v in AllStopBits)
                    {
                        if ((strValue == v.ToString()) && (StopBits != v))
                        {
                            StopBits = v;
                            return CfgUpdateFlags.RestartRqrd;
                        }
                    }
                    return CfgUpdateFlags.None;

                case 5:
                    foreach (var v in AllHandshakes)
                    {
                        if ((strValue == v.ToString()) && (Handshake != v))
                        {
                            Handshake = v;
                            return CfgUpdateFlags.RestartRqrd;
                        }
                    }
                    return CfgUpdateFlags.None;

                default:
                    return CfgUpdateFlags.None;
            }
        }


        public bool ValidateParam(int i, string strValue, out string message)
        {
            message = string.Empty;

            switch (i)
            {
                case 0:
                    int comPortNr;
                    if (int.TryParse(strValue, out comPortNr) && comPortNr > 0 && comPortNr <= 999) return true;
                    break;
                case 1:
                    foreach (var v in AllBaudRates) if (strValue == v.ToString()) return true;
                    break;
                case 2:
                    foreach (var v in AllDataBits) if (strValue == v.ToString()) return true;
                    break;         
                case 3:
                    foreach (var v in AllParities) if (strValue == v.ToString()) return true;
                    break;         
                case 4:
                    foreach (var v in AllStopBits) if (strValue == v.ToString()) return true;
                    break;         
                case 5:
                    foreach (var v in AllHandshakes) if (strValue == v.ToString()) return true;
                    break;
         
                default:
                    message = "Invalid index";
                    return false;
            }

            message = ParamName(i) + " is invalid";
            return false;
        }

        void CopyContentTo(HartCfg prms)
        {
            prms.ParentName = this.ParentName;
            prms.ComPortNr = this.ComPortNr;
            prms.BaudRate = this.BaudRate;
            prms.DataBits = this.DataBits;
            prms.Parity = this.Parity;
            prms.StopBits = this.StopBits;
            prms.Handshake = this.Handshake;
        }


        public IParamsProvider Clone()
        {
            HartCfg pars = new HartCfg();
            CopyContentTo(pars);
            return pars;
        }

        public bool UpdateEmbeddedDbEntity()
        {
            return true;    /// =OK, do nothing
        }
    }
}