#region License Information
/* HeuristicLab
 * Copyright (C) 2002-2012 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 System.Collections.Generic;
using System.Linq;
using System.Text;
using HeuristicLab.Common;
using HeuristicLab.Core;
using HeuristicLab.Encodings.ConditionActionEncoding;
using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;

namespace HeuristicLab.Encodings.VariableVector {
  [StorableClass]
  [Item("VariableVectorCondition", "")]
  public class VariableVectorCondition : Item, ICondition {

    [Storable]
    private Dictionary<string, IVariable> variableDictionary;
    public Dictionary<string, IVariable> VariableDictionary {
      get { return variableDictionary; }
      protected set { variableDictionary = value; }
    }

    public int VirtualLength { get { return VariableDictionary.Values.Sum(x => x.VirtualLength); } }

    [StorableConstructor]
    protected VariableVectorCondition(bool deserializing) { }
    protected VariableVectorCondition(VariableVectorCondition original, Cloner cloner) {
      VariableDictionary = new Dictionary<string, IVariable>(original.VariableDictionary.Count);
      foreach (var item in original.VariableDictionary) {
        VariableDictionary.Add(item.Key, cloner.Clone(item.Value));
      }
    }
    public VariableVectorCondition()
      : base() {
      VariableDictionary = new Dictionary<string, IVariable>();
    }
    public VariableVectorCondition(int capacity)
      : base() {
      VariableDictionary = new Dictionary<string, IVariable>(capacity);
    }
    public VariableVectorCondition(IDictionary<string, IVariable> dictionary)
      : base() {
      VariableDictionary = new Dictionary<string, IVariable>(dictionary);
    }
    public override IDeepCloneable Clone(Cloner cloner) {
      return new VariableVectorCondition(this, cloner);
    }

    public bool Match(IInput target) {
      var targetCast = target as VariableVectorInput;
      if (targetCast == null) { return false; }
      foreach (var key in VariableDictionary.Keys) {
        if (!targetCast.InputDictionary.ContainsKey(key) || !VariableDictionary[key].MatchInput(targetCast.InputDictionary[key])) {
          return false;
        }
      }
      return true;
    }

    public void Add(IEnumerable<IVariable> condition) {
      foreach (var variable in condition) {
        VariableDictionary.Add(variable.VariableName, variable);
      }
    }

    public override string ToString() {
      StringBuilder sb = new StringBuilder();
      bool first = true;
      foreach (var variable in VariableDictionary.Values) {
        if (first) {
          first = false;
        } else {
          sb.Append(";");
        }
        sb.Append(variable.ToString());
      }
      return sb.ToString();
    }

    public void Randomize(IRandom random, double changeSymbolProbability, double spreadPercentage) {
      foreach (var variable in VariableDictionary.Values) {
        if (variable is DoubleVariable) {
          ((DoubleVariable)variable).Randomize(random, changeSymbolProbability, spreadPercentage);
        } else {
          variable.Randomize(random, changeSymbolProbability);
        }
      }
    }

    public bool Identical(VariableVectorCondition target) {
      var thisEnumerator = VariableDictionary.GetEnumerator();
      var targetEnumerator = target.VariableDictionary.GetEnumerator();

      while (thisEnumerator.MoveNext() && targetEnumerator.MoveNext()) {
        if (thisEnumerator.Current.Key != targetEnumerator.Current.Key ||
          !thisEnumerator.Current.Value.Identical(targetEnumerator.Current.Value)) {
          return false;
        }
      }

      return !thisEnumerator.MoveNext() && !targetEnumerator.MoveNext();
    }
  }
}