#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("VariableVectorAction", "")]
  public class VariableVectorAction : Item, IAction {

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

    public IOrderedEnumerable<string> Order { get { return VariableDictionary.Keys.OrderBy(x => x); } }

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

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

    public VariableVectorAction GetEmptyCopy() {
      VariableVectorAction emptyCopy = new VariableVectorAction(VariableDictionary.Count);
      emptyCopy.Add(VariableDictionary.Values.Select(x => x.GetEmptyCopy()));
      return emptyCopy;
    }

    public VariableVectorAction GetSetCopy() {
      VariableVectorAction setCopy = new VariableVectorAction(VariableDictionary.Count);
      setCopy.Add(VariableDictionary.Values.Select(x => x.GetSetCopy()));
      return setCopy;
    }

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

    public void Add(IEnumerable<IActionVariable> action) {
      foreach (var variable in action) {
        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) {
      foreach (var variable in VariableDictionary.Values) {
        variable.RandomizeAction(random);
      }
    }

    public bool Identical(VariableVectorAction target) {
      if (!this.Order.SequenceEqual(target.Order)) { return false; }
      foreach (var keyValuePair in target.VariableDictionary) {
        if (!VariableDictionary[keyValuePair.Key].Identical(keyValuePair.Value)) {
          return false;
        }
      }
      return true;
    }
  }
}