/*

* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description:

*

*/

#include "bmhelper.h"

#include <QDebug>

BMHelper::BMHelper(int totalSize)

{

    for ( int i(0); i < totalSize; i++)

        mBuffer.append(false);

}

BMHelper::~BMHelper()

{

}

void BMHelper::release(int start, int end)

{

    if ((start <0 && end <0) || (start >=mBuffer.size() && end >=mBuffer.size() ) )

        return;

    if ( start<0)

        start = 0;

    if (end>mBuffer.size())

        end = mBuffer.size();

    if ( start > end){

        int t = start;

        start = end;

        end = t;

    }

    if ( start<0)

        start = 0;

    if (end>=mBuffer.size())

        end = mBuffer.size()-1;

    for ( int i = start; i <= end; i++){

        if (mBuffer.value(i) == true){

            mBuffer.replace(i, false);

        } else {

//            qWarning()<<QString("release released item %1").arg(i);

        }

    }

}

void BMHelper::request(int start, int end, HgRequestOrder order)

{

    Q_UNUSED(order);

    if ((start <0 && end <0) || (start >=mBuffer.size() && end >=mBuffer.size() ) )

        return;

    if ( start<0)

        start = 0;

    if (end>=mBuffer.size())

        end = mBuffer.size()-1;

    if ( start > end){

        int t = start;

        start = end;

        end = t;

    }

    if ( start<0)

        start = 0;

    if (end>=mBuffer.size())

        end = mBuffer.size()-1;

    for ( int i = start; i <= end; i++){

        if (mBuffer.value(i) == false){

            mBuffer.replace(i, true);

        } else {

//            qWarning()<<QString("request requested item %1").arg(i);

        }

    }

}

bool BMHelper::isIntergal(int bufferSize)

{

    int c = mBuffer.count(true);

    bool res = (c == mBuffer.count())||(bufferSize == c);

    if (res){ ///check integrity ( if all items from first true, to size are true;

        int f = mBuffer.indexOf(true);

        for ( int i =0; i < mBuffer.count(); i++){

            if (mBuffer[i] != (i>=f && i < f+c) ){

                res = false;

                break;

            }

        }

    } else {

        QString arr;

        QString item = "%1,";        

        for ( int i =0; i < mBuffer.count(); i++){

            if(mBuffer[i]){

                arr+=item.arg(i);

            }

        }

        qWarning()<<QString("isIntergal mBuffer.count(true)=%1 bufferSize=%2 visible:%3").arg(c).arg(bufferSize).arg(arr);

    }

    return res;

}

int BMHelper::totalSize()

{

    return mBuffer.count();

}

void BMHelper::remove(int pos)

{

    if ( pos <0 || pos > mBuffer.count()){

        return;

    }

    mBuffer.removeAt(pos);    

}

void BMHelper::insert(int pos)

{

    if ( pos <0 || pos > mBuffer.count()){

        return;

    }    

    mBuffer.insert(pos, false);

}