///
/// Copyright (c) 2015-2021 Sensus Slovensko a.s.
///
using System.Collections.Generic;
using System.IO.Ports;
using System.Xml.Serialization;
using Common;
using Config.Entities;
using TBF.Rig.Generic;

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

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

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

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

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

        public string ComponentName { get { return Name; } }

        public void InitializeAll()
        {
            ComPortNr = 3;
            BaudRate = 9600;
            Parity = System.IO.Ports.Parity.None;
            DataBits = 8;
            StopBits = System.IO.Ports.StopBits.One;
            Handshake = System.IO.Ports.Handshake.None;
        }

        string[] paramNames = new string[]
        {
            "Serial port number",   /// 0
            "Baud rate",            /// 1
            "Parity",               /// 2
            "Data bits",            /// 3
            "Stop bits",            /// 4
            "Handshake",            /// 5
        };
        public string ParamName(int i) { return paramNames[i]; }
        public int ParamsCount() { return paramNames.Length; }

        public ICollection<string> ParamValues(int i)
        {
            switch (i)
            {
                case 1:
                    return new string[] { "150", "300", "600", "1200", "2400", "4800", "9600",
                                          "19200", "38400", "57600", "76800", "115200"};
                case 2:
                    return new string[] { Parity.None.ToString(), Parity.Odd.ToString(), Parity.Even.ToString() };
                case 3:
                    return new string[] { "7", "8" };
                case 4:
                    return new string[] { StopBits.None.ToString(),
                                          StopBits.One.ToString(),
                                          StopBits.OnePointFive.ToString(),
                                          StopBits.Two.ToString() };
                case 5:
                    return new string[] { Handshake.None.ToString(),
                                          Handshake.XOnXOff.ToString(),
                                          Handshake.RequestToSend.ToString(),
                                          Handshake.RequestToSendXOnXOff.ToString() };
                default:
                    return null;
            }
        }

        public string ToString(int i)
        {
            switch (i)
            {
                case 0: return ComPortNr.ToString();
                case 1: return BaudRate.ToString();
                case 2: return Parity.ToString();
                case 3: return DataBits.ToString();
                case 4: return StopBits.ToString();
                case 5: return Handshake.ToString();
                default:
                    return string.Format("{0}: Com{1}, {2}Bd, {3}-bits, parity={4}, stopBits={5}, {6}",
                                         Name, ComPortNr, BaudRate, DataBits, Parity, StopBits, Handshake);
            }
        }

        public CfgUpdateFlags UpdateParam(int i, string str)
        {
            switch (i)
            {
                case 0: ComPortNr = int.Parse(str);    return CfgUpdateFlags.RestartRqrd;
                case 1: BaudRate  = int.Parse(str);    return CfgUpdateFlags.RestartRqrd;
                case 2: Parity    = TBF.Utils.GetParity(str);    return CfgUpdateFlags.RestartRqrd;
                case 3: DataBits  = int.Parse(str);    return CfgUpdateFlags.RestartRqrd;
                case 4: StopBits  = TBF.Utils.GetStopBits(str); return CfgUpdateFlags.RestartRqrd;
                case 5: Handshake = TBF.Utils.GetHandshake(str); return CfgUpdateFlags.RestartRqrd;
                default: return CfgUpdateFlags.None;
            }
        }

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

            switch (i)
            {
                case 0:
                    if (int.TryParse(strValue, out idummy) && idummy > 0) return true;
                    break;
                case 1:
                case 2:
                case 3:
                case 4:
                case 5:
                    if (ParamValues(i).Contains(strValue)) return true;
                    break;
                default:
                    message = "Invalid index";
                    return false;
            }

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

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

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

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