///
/// Copyright (c) 2015-2016 Sensus Slovensko a.s.
///
using System;
using System.Collections.Generic;
using log4net;
using TBF.Rig.GenericDevices;
using Dirichlet.Numerics;

namespace TBF.Rig.BuiltIn.ValveEx
{
	public class Valve : ComponentBase, Generic.IComponent
	{
		private static readonly ILog log = LogManager.GetLogger(typeof(Valve));
        public override string ToString() { return string.Format("{0}({1})", ClassName, Cfg.ToString(-1)); }

		readonly ValveCfg valveCfg;
        public readonly IValve[] InputValves;
        public readonly UInt128 Mask;				        /// derived from bitPosition in the constructor


		public Valve() { }

		public Valve(Generic.IComponentCfg cfg, IList<Generic.IComponent> components)
			: base(cfg)
		{
			valveCfg = cfg as ValveCfg;
			
			InputValves = new IValve[valveCfg.InputValvesCount];
			InputValves[0] = TbfComponents.FindComponent(valveCfg.Input1, components) as IValve;
			InputValves[1] = TbfComponents.FindComponent(valveCfg.Input2, components) as IValve;
            if (InputValves.Length > 2)
            {
                InputValves[2] = TbfComponents.FindComponent(valveCfg.Input3, components) as IValve;
            }
            if (InputValves.Length > 3)
            {
                InputValves[3] = TbfComponents.FindComponent(valveCfg.Input4, components) as IValve;
            }
            if (InputValves.Length > 4)
            {
                InputValves[4] = TbfComponents.FindComponent(valveCfg.Input5, components) as IValve;
            }

            Mask = (((UInt128)1) << valveCfg.BitPosition);

            log.Warn(this.ToString());
		}

        public override void Initialize() { }


        public void UpdateRoute(ref UInt128 route)
		{
			bool output;

			if (valveCfg.LogicalOp == ValveExOperation.And)
			{
				output = true;
				foreach (var valve in InputValves)
				{
					if (valve != null) output = output && valve.State;
				}
			}
			else if (valveCfg.LogicalOp == ValveExOperation.Or)
			{
				output = false;
				foreach (var valve in InputValves)
				{
					if (valve != null) output = output || valve.State;
				}
			}
			else
				return;

			if (output != valveCfg.InvertOutput)
			{
				route = route | Mask;		/// Set the output bit to true
			}
			else
			{
				route = route & (~Mask);	/// Reset the output bit to false
			}
		}
    }
}