/****************************************************************************
**
** Copyright (C) 2008-2010 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (developer.feedback@nokia.com)
**
** This file is part of the HbWidgets module of the UI Extensions for Mobile.
**
** GNU Lesser General Public License Usage
** This file may be used under the terms of the GNU Lesser General Public
** License version 2.1 as published by the Free Software Foundation and
** appearing in the file LICENSE.LGPL included in the packaging of this file.
** Please review the following information to ensure the GNU Lesser General
** Public License version 2.1 requirements will be met:
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights.  These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at developer.feedback@nokia.com.
**
****************************************************************************/

#include <QGraphicsLinearLayout>
#include <qglobal.h>
#include "hbabstractviewitem.h"
#include "hbselectiondialog_p.h"
#include <hblabel.h>
#include <hblistwidget.h>
#include <hblistwidgetitem.h>
#include <QtDebug>
#include <hbcheckbox.h>
#include <hbaction.h>

HbSelectionDialogContentWidget::HbSelectionDialogContentWidget(HbSelectionDialogPrivate *priv):HbWidget(),
                        mListWidget(0),d(priv),chkMark(0),lbCounter(0)
{
    mListWidget = new HbListWidget(this);
    HbStyle::setItemName(mListWidget, "list");
    QObject::connect(mListWidget,SIGNAL(activated(const QModelIndex&)),this,SLOT(_q_listItemSelected(QModelIndex)));
    QObject::connect(mListWidget,SIGNAL(activated(HbListWidgetItem *)),this,SLOT(_q_listWidgetItemSelected(HbListWidgetItem *)));
}

void HbSelectionDialogContentWidget::_q_listWidgetItemSelected(HbListWidgetItem *item)
{
    if(item){
        updateCounter();
    }
}

void HbSelectionDialogContentWidget::_q_listItemSelected(QModelIndex index)
{
    Q_UNUSED(index)
    if(mListWidget->selectionMode()== HbAbstractItemView::SingleSelection ||
       mListWidget->selectionMode()== HbAbstractItemView::NoSelection){
       d->close();   
    }
    updateCounter();
}

int HbSelectionDialogContentWidget::selectedItemCount() const
{
    int selectedItems = 0;
    QItemSelectionModel* selectionModel = mListWidget->selectionModel();
    if(selectionModel){
        selectedItems = selectionModel->selectedRows().count();
    }
    return selectedItems;
}

int HbSelectionDialogContentWidget::totalItemCount() const
{
    return mListWidget->count();
}

void HbSelectionDialogContentWidget::updateCounter()
{
    if(mListWidget->selectionMode()!= HbAbstractItemView::MultiSelection) return;
    if(chkMark && lbCounter){
        int totalItems = totalItemCount();
        int selectedItems = selectedItemCount();

        lbCounter->setText(QString(QString::number(selectedItems) + "/" + QString::number(totalItems)));
        //update checked state of "MarkAll" checkbox 
        if (totalItems > 0 && (selectedItems == totalItems)){
            chkMark->blockSignals(true); //should not call _q_checkboxclicked()
            chkMark->setChecked(true);
            chkMark->blockSignals(false);
        }
        else{
            chkMark->blockSignals(true); //should not call _q_checkboxclicked()
            chkMark->setChecked(false);
            chkMark->blockSignals(false);
        }
    }
}

void HbSelectionDialogContentWidget::_q_checkboxclicked(int value)
{
    int totalItems = 0;
    int selectedItems = 0;
    QAbstractItemModel* itemModel = mListWidget->model();
    QModelIndex indexStart,indexEnd;
    if(itemModel){
        indexStart = itemModel->index(0,0);
        indexEnd = itemModel->index(itemModel->rowCount()-1,0);
        totalItems = itemModel->rowCount();
        Q_UNUSED( totalItems ); // todo: remove totalItems if not needed
    }

    QItemSelectionModel* selectionModel = mListWidget->selectionModel();
    if(selectionModel){
        selectedItems = selectionModel->selectedRows().count();
        Q_UNUSED( selectedItems ); // todo: remove selectedItems if not needed
        if(value){ //Select All
            selectionModel->select(QItemSelection(indexStart,indexEnd),QItemSelectionModel::Select);
        }
        else{ //Select None
            selectionModel->clear();
        }
    }
    updateCounter();
}

void HbSelectionDialogContentWidget::showMarkWidget(bool bShow)
{
    if(bShow){
            chkMark = new HbCheckBox(this);
            chkMark->setText("Mark All");
            lbCounter = new HbTextItem(this);
            HbStyle::setItemName(chkMark,"checkbox");
            HbStyle::setItemName(lbCounter,"counter");
            setProperty("multiSelection",true);
            connect(chkMark,SIGNAL(stateChanged ( int )),this,SLOT(_q_checkboxclicked(int)));
            updateCounter();
    }
    else{
        delete chkMark;chkMark=0;
        delete lbCounter;lbCounter=0;
        HbStyle::setItemName(chkMark,"");
        HbStyle::setItemName(lbCounter,"");
        setProperty("multiSelection",false);
    }
}

HbSelectionDialogPrivate::HbSelectionDialogPrivate()
    :HbDialogPrivate()
{
    bOwnItems = false;
}

HbSelectionDialogPrivate::~HbSelectionDialogPrivate()
{
    if(!bOwnItems){
            Q_Q(HbSelectionDialog);
            HbSelectionDialogContentWidget* cWidget = qobject_cast<HbSelectionDialogContentWidget*>(q->contentWidget());
            if(cWidget){
                if(cWidget->mListWidget){
                    int nRows = 0;
                    QAbstractItemModel* itemModel = cWidget->mListWidget->model();
                    if(itemModel){
                        nRows = itemModel->rowCount();
                        while(nRows){
                            cWidget->mListWidget->takeItem(0);
                            nRows = itemModel->rowCount();
                        }
                    }
                }
            }
    }
}

void HbSelectionDialogPrivate::init()
{
    qDebug()<<" Entering init()";
    Q_Q(HbSelectionDialog);

    bOwnItems = false;

    HbSelectionDialogContentWidget* contentWidget = new HbSelectionDialogContentWidget(this);
    q->setContentWidget(contentWidget);

    q->addAction(new HbAction(q->tr("Ok"), q));

    q->addAction(new HbAction(q->tr("Cancel"), q));
    q->setTimeout(0);
    q->setModal(true);
}

void HbSelectionDialogPrivate::setSelectionMode(HbAbstractItemView::SelectionMode mode)
{
    Q_Q(HbSelectionDialog);

    mSelectionMode = mode;
    switch(mode)
    {
    case HbAbstractItemView::SingleSelection:
    case HbAbstractItemView::MultiSelection:
    case HbAbstractItemView::NoSelection:
    {
        HbSelectionDialogContentWidget* cWidget = qobject_cast<HbSelectionDialogContentWidget*>(q->contentWidget());
        if(cWidget){
            cWidget->mListWidget->setSelectionMode(mode);
        }
        if(mode == HbAbstractItemView::MultiSelection)
            cWidget->showMarkWidget(true);    
        else
            cWidget->showMarkWidget(false);    
    }
    break;
    }
}

QList<HbListWidgetItem*> HbSelectionDialogPrivate::widgetItems() const
{
    Q_Q(const HbSelectionDialog);

    QList<HbListWidgetItem*> rows;
    HbSelectionDialogContentWidget* cWidget = qobject_cast<HbSelectionDialogContentWidget*>(q->contentWidget());
    if(cWidget){
        HbListWidget* widget = qobject_cast<HbListWidget*>(cWidget->mListWidget);
        if(widget){
            int count = 0;
            QAbstractItemModel* itemModel = widget->model();
            if(itemModel)
                count = itemModel->rowCount();
            for(int i = 0; i < count; i++){
                rows.append(widget->item(i));
            }
        }
    }
    return rows;
}

void HbSelectionDialogPrivate::setStringItems(const QStringList &items, int currentIndex)
{
    Q_Q(HbSelectionDialog);

    HbSelectionDialogContentWidget* cWidget = qobject_cast<HbSelectionDialogContentWidget*>(q->contentWidget());
    if(!cWidget) return;
    
    int nRows = 0;

    if(cWidget->mListWidget){
        int count = items.size();
        for (int i = 0; i < count; ++i) {
            HbListWidgetItem* modelItem = new HbListWidgetItem();
            QString str = items.at(i);
            modelItem->setText(str);
            cWidget->mListWidget->addItem(modelItem);
            
            QAbstractItemModel* itemModel = cWidget->mListWidget->model();
            if(itemModel)
                nRows = itemModel->rowCount();
        }
        if(nRows > 0){ //if addition of rows was correct.
            QList<QVariant> currentRow;
            currentRow.append(QVariant(currentIndex));
            setSelectedItems(currentRow);
        }
        
    }
}

QStringList HbSelectionDialogPrivate::stringItems() const
{
    QStringList list;
    QList<HbListWidgetItem*> items = widgetItems();
    int count = items.count();
    for(int i = 0; i < count; i++){
                QString text = items[i]->text();
                if(!text.isEmpty()){
            list += text;
        }
    }
    return list;
}

void HbSelectionDialogPrivate::setModel(QAbstractItemModel* model)
{
    Q_Q(HbSelectionDialog);

    HbSelectionDialogContentWidget* cWidget = qobject_cast<HbSelectionDialogContentWidget*>(q->contentWidget());
    if(cWidget){
        cWidget->mListWidget->HbListView::setModel(model); //HbListView's implementation of setModel()
    }
}

void HbSelectionDialogPrivate::setWidgetItems(const QList<HbListWidgetItem*> &items,bool transferOwnership,int currentIndex)
{
    Q_Q(HbSelectionDialog);

    HbSelectionDialogContentWidget* cWidget = qobject_cast<HbSelectionDialogContentWidget*>(q->contentWidget());
    if(cWidget){
        if(cWidget->mListWidget){
            int count = items.count();
            for(int i = 0; i < count; i++){
                cWidget->mListWidget->addItem(items[i]);
            }
            cWidget->mListWidget->setCurrentRow(currentIndex);
            
        }
        bOwnItems = transferOwnership;
    }
}

QAbstractItemModel* HbSelectionDialogPrivate::model() const
{
    Q_Q(const HbSelectionDialog);
    
    HbSelectionDialogContentWidget* cWidget = qobject_cast<HbSelectionDialogContentWidget*>(q->contentWidget());
    if(cWidget){
        return cWidget->mListWidget->HbListView::model(); //HbListView's implementation of model()
    }
    return 0;
}

QItemSelectionModel* HbSelectionDialogPrivate::selectionModel() const
{
    Q_Q(const HbSelectionDialog);
    
    HbSelectionDialogContentWidget* cWidget = qobject_cast<HbSelectionDialogContentWidget*>(q->contentWidget());
    if(cWidget){
        return cWidget->mListWidget->selectionModel();
    }
    return 0;
}

void HbSelectionDialogPrivate::setSelectedItems(const QList<QVariant> items)
{
    Q_Q(const HbSelectionDialog);
    QItemSelectionModel *model = 0;
    model = selectionModel();
    if(model){
        Q_FOREACH(QVariant i,items) {
                model->select(model->model()->index(i.toInt(),0),
                    QItemSelectionModel::Select);
        }
    }
    HbSelectionDialogContentWidget* cWidget = qobject_cast<HbSelectionDialogContentWidget*>(q->contentWidget());
    if(cWidget){
        cWidget->updateCounter();
    }
}

QList<QVariant> HbSelectionDialogPrivate::selectedItems() const
{
    QItemSelectionModel *model = 0;
    QList<QVariant> selIndexes;
    model = selectionModel();
    if(model){
        QModelIndexList indexes = model->selectedIndexes();
        int count = indexes.count();
        QModelIndex index;
        for(int i = 0 ; i < count ; i++){
            index = indexes[i];
            selIndexes.append(QVariant(index.row()));
        }
    }
    return selIndexes;

}

QModelIndexList HbSelectionDialogPrivate::selectedModelIndexes() const
{
    QItemSelectionModel *model = 0;
    QModelIndexList selIndexes;
    model = selectionModel();
    if(model){
        selIndexes =  model->selectedIndexes();
    }
    return selIndexes;
}

void HbSelectionDialogPrivate::close()
{
    Q_Q(HbSelectionDialog);
    q->close();
}