#region License Information
/* HeuristicLab
 * Copyright (C) 2002-2017 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.Linq;
using HeuristicLab.Core;
using HeuristicLab.Data;
using HeuristicLab.Encodings.BinaryVectorEncoding;
using HeuristicLab.Encodings.PermutationEncoding;

namespace HeuristicLab.Problems.Scheduling.CFSAP {
  public static class OneOptAssignment {

    public static BinaryVector MakeAssignment(Permutation order, BinaryVector assignment, IntMatrix processingTimes, ItemList<IntMatrix> setupTimes, out int T) {
      var oneOptAssignment = (BinaryVector)assignment.Clone();
      T = CFSAP.EvaluateAssignment(order, assignment, processingTimes, setupTimes);

      while (true) {
        var foundBetterSolution = false;

        for (var i = 0; i < oneOptAssignment.Length; ++i) {
          var newAssignment = (BinaryVector)oneOptAssignment.Clone();
          newAssignment[i] = !newAssignment[i];
          int newT = CFSAP.EvaluateAssignment(order, newAssignment, processingTimes, setupTimes);
          if (newT < T) { // new best solution has been found
            oneOptAssignment = newAssignment;
            T = newT;
            foundBetterSolution = true;
            break;
          }
        }

        if (!foundBetterSolution)
          return oneOptAssignment;
      }
    }
  }
}