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// Copyright 2008, 2009 Brady J. Garvin

// This file is part of Covering Arrays by Simulated Annealing (CASA).

// CASA 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.

// CASA 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 CASA.  If not, see <http://www.gnu.org/licenses/>.


#ifndef COVERING_ARRAY_HEURISTIC_H
#define COVERING_ARRAY_HEURISTIC_H

#include "search/Heuristic.H"

#include "covering/state/CoveringArray.H"
#include "covering/goal/CoverageGoal.H"

class CoveringArrayHeuristic : public Heuristic<CoveringArray, CoverageCost> {
  CoverageCost estimate
    (const CoveringArray&state, const Goal<CoveringArray>&goal) const {
    unsigned targetCoverage = ((CoverageGoal&)goal).getTargetCoverage();
    return CoverageCost
      (targetCoverage - state.getCoverageCount(),
       state.getMultipleCoverageCount());
  }
};

#endif