// progress_meter.cpp

/*    Copyright 2009 10gen Inc.
 *
 *    This program is free software: you can redistribute it and/or  modify
 *    it under the terms of the GNU Affero General Public License, version 3,
 *    as published by the Free Software Foundation.
 *
 *    This program 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 Affero General Public License for more details.
 *
 *    You should have received a copy of the GNU Affero General Public License
 *    along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 *    As a special exception, the copyright holders give permission to link the
 *    code of portions of this program with the OpenSSL library under certain
 *    conditions as described in each individual source file and distribute
 *    linked combinations including the program with the OpenSSL library. You
 *    must comply with the GNU Affero General Public License in all respects
 *    for all of the code used other than as permitted herein. If you modify
 *    file(s) with this exception, you may extend this exception to your
 *    version of the file(s), but you are not obligated to do so. If you do not
 *    wish to do so, delete this exception statement from your version. If you
 *    delete this exception statement from all source files in the program,
 *    then also delete it in the license file.
 */

#include "mongo/pch.h" // needed for log.h

#include "mongo/util/progress_meter.h"

#include "mongo/util/log.h"

using namespace std;

namespace mongo {

    void ProgressMeter::reset( unsigned long long total , int secondsBetween , int checkInterval) {
        _total = total;
        _secondsBetween = secondsBetween;
        _checkInterval = checkInterval;
        
        _done = 0;
        _hits = 0;
        _lastTime = (int)time(0);
        
        _active = 1;
    }


    bool ProgressMeter::hit( int n ) {
        if ( ! _active ) {
            warning() << "hit an inactive ProgressMeter" << endl;
            return false;
        }
        
        _done += n;
        _hits++;
        if ( _hits % _checkInterval )
            return false;
        
        int t = (int) time(0);
        if ( t - _lastTime < _secondsBetween )
            return false;
        
        if ( _total > 0 ) {
            int per = (int)( ( (double)_done * 100.0 ) / (double)_total );
            LogstreamBuilder out = log();
            out << "\t\t" << _name << ": " << _done;

            if (_showTotal) {
                out << '/' << _total << '\t' << per << '%';
            }

            if ( ! _units.empty() ) {
                out << "\t(" << _units << ")";
            }
            out << endl;
        }
        _lastTime = t;
        return true;
    }
    
    string ProgressMeter::toString() const {
        if ( ! _active )
            return "";
        stringstream buf;
        buf << _name << ": " << _done << '/' << _total << ' ' << (_done*100)/_total << '%';
        
        if ( ! _units.empty() ) {
            buf << "\t(" << _units << ")" << endl;
        }
        
        return buf.str();
    }


}