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/*===========================================================================*
 * This file is part of the Bcps Linear Solver (BLIS).                       *
 *                                                                           *
 * BLIS is distributed under the Common Public License as part of the        *
 * COIN-OR repository (http://www.coin-or.org).                              *
 *                                                                           *
 * Authors:                                                                  *
 *                                                                           *
 *          Yan Xu, Lehigh University                                        *
 *          Ted Ralphs, Lehigh University                                    *
 *                                                                           *
 * Conceptual Design:                                                        *
 *                                                                           *
 *          Yan Xu, Lehigh University                                        *
 *          Ted Ralphs, Lehigh University                                    *
 *          Laszlo Ladanyi, IBM T.J. Watson Research Center                  *
 *          Matthew Saltzman, Clemson University                             *
 *                                                                           * 
 *                                                                           *
 * Copyright (C) 2001-2005, International Business Machines                  *
 * Corporation, Lehigh University, Yan Xu, Ted Ralphs, Matthew Salzman and   *
 * others. All Rights Reserved.                                              *
 *===========================================================================*/

#ifndef BlisPseudo_h_
#define BlisPseudo_h_

#include "CoinError.hpp"

//#############################################################################

class BlisPseudocost 
{
 private:
    double weight_;

    int upCount_;

    double upCost_;

    int downCount_;

    double downCost_;

    double score_;
    
 public:
    BlisPseudocost() : 
        weight_(1.0),
        upCount_(0),
        upCost_(0.0), 
        downCount_(0), 
        downCost_(0.0),
        score_(0.0)
        {}
    
    BlisPseudocost(double uc, 
                   int un,
                   double dc, 
                   int dn,
                   double s)
        :
        weight_(1.0),
        upCount_(un),
        upCost_(uc), 
        downCount_(dn),
        downCost_(dc),
        score_(s) 
        {}
    
    void setWeight(double w) { 
        if (w < 0.0 || w > 1.0) {   
            throw CoinError("weight is not in range [0,1]", "setWeight", 
                            "BlisPseudo");
        }
        weight_= w; 
    }

    void update(const int dir,
                const double parentObjValue,
                const double objValue,
                const double solValue);

    void update(const int dir,
                const double objDiff,
                const double solValue);
    
    int getUpCount() { return upCount_; }

    double getUpCost() { return upCost_; }
    
    int getDownCount() { return downCount_; }
    
    double getDownCost() { return downCost_; } 

    double getScore() { return score_; } 
};

#endif

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