#region License Information
/* HeuristicLab
 * Copyright (C) 2002-2014 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
 *
 * This file is part of HeuristicLab.
 *
 * HeuristicLab is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * HeuristicLab is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
 */
#endregion

using HeuristicLab.Common;
using HeuristicLab.Core;
using HeuristicLab.Data;
using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
using System;

namespace HeuristicLab.Optimization.Networks {
  [Item("MultiplierNode", "A node for multiplying integer values.")]
  [StorableClass]
  public class MultiplierNode : Node {
    protected static readonly string MultiplierPortName = "Multiplier";
    protected static readonly string ValuePortName = "Value";

    public IInputPort<IntValue> MultiplierPort {
      get { return (IInputPort<IntValue>)Ports[MultiplierPortName]; }
    }
    public IInputOutputPort<IntValue, IntValue> ValuePort {
      get { return (IInputOutputPort<IntValue, IntValue>)Ports[ValuePortName]; }
    }

    [StorableConstructor]
    protected MultiplierNode(bool deserializing) : base(deserializing) { }
    protected MultiplierNode(MultiplierNode original, Cloner cloner) : base(original, cloner) { }
    public MultiplierNode()
      : base("MultiplierNode") {
      Initialize();
    }
    public MultiplierNode(string name)
      : base(name) {
      Initialize();
    }
    public MultiplierNode(string name, string description)
      : base(name, description) {
      Initialize();
    }

    public override IDeepCloneable Clone(Cloner cloner) {
      return new MultiplierNode(this, cloner);
    }

    protected virtual void Initialize() {
      Ports.Add(new InputPort<IntValue>(MultiplierPortName));
      Ports.Add(new InputOutputPort<IntValue, IntValue>(ValuePortName));
      RegisterPortEvents();
    }

    protected virtual void RegisterPortEvents() {
      ValuePort.ValueReceived += ValuePort_ValueReceived;
    }

    protected virtual void ValuePort_ValueReceived(object sender, OutputInputPortEventArgs<IntValue, IntValue> e) {
      if (MultiplierPort.Value == null) throw new InvalidOperationException("Multiplier is null");
      if (e.Value != null) {
        e.Result = new IntValue(e.Value.Value * MultiplierPort.Value.Value);
      }
    }
  }
}