/***************************************************************************
 *   Copyright (C) 2015 by Saheb Preet Singh <saheb.preet@gmail.com>       *
 *                                                                         *
 *   This program 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 2 of the License, or     *
 *   (at your option) any later version.                                   *
 ***************************************************************************/

#include "layers.h"
#include "settings.h"

// qt/kde includes
#include <ktitlewidget.h>
#include <klocalizedstring.h>
#include <QVBoxLayout>
#include <QTreeView>
#include <qheaderview.h>

#include <kwidgetsaddons_version.h>

// local includes
#include "core/document.h"
#include "ktreeviewsearchline.h"
#include "ui/pageview.h"

Layers::Layers(QWidget *parent, Okular::Document *document) : QWidget(parent), m_document(document)
{
    QVBoxLayout * const mainlay = new QVBoxLayout( this );
    mainlay->setSpacing( 6 );

    m_document->addObserver( this );

    KTitleWidget *titleWidget = new KTitleWidget( this );
    #if KWIDGETSADDONS_VERSION >= QT_VERSION_CHECK(5, 53, 0)
    titleWidget->setLevel( 2 );
    #endif
    titleWidget->setText( i18n( "Layers" ) );
    mainlay->addWidget( titleWidget );
    mainlay->setAlignment( titleWidget, Qt::AlignHCenter );
    m_searchLine = new KTreeViewSearchLine( this );
    mainlay->addWidget( m_searchLine );
    m_searchLine->setCaseSensitivity( Okular::Settings::self()->layersSearchCaseSensitive() ? Qt::CaseSensitive : Qt::CaseInsensitive );
    m_searchLine->setRegularExpression( Okular::Settings::self()->layersSearchRegularExpression() );
    connect( m_searchLine, &KTreeViewSearchLine::searchOptionsChanged, this, &Layers::saveSearchOptions );

    m_treeView = new QTreeView( this );
    mainlay->addWidget( m_treeView );

    m_treeView->setSortingEnabled( false );
    m_treeView->setRootIsDecorated( true );
    m_treeView->setAlternatingRowColors( true );
    m_treeView->header()->hide();
}

Layers::~Layers()
{
    m_document->removeObserver( this );
}

void Layers::notifySetup( const QVector< Okular::Page * > & /*pages*/, int /*setupFlags*/ )
{
    QAbstractItemModel * layersModel = m_document->layersModel();

    if( layersModel )
    {
        m_treeView->setModel( layersModel );
        m_searchLine->setTreeView( m_treeView );
        emit hasLayers( true );
        connect( layersModel, &QAbstractItemModel::dataChanged, m_document, &Okular::Document::reloadDocument );
        connect( layersModel, &QAbstractItemModel::dataChanged, m_pageView, &PageView::reloadForms );
    }
    else
    {
        emit hasLayers( false );
    }
}

void Layers::setPageView(PageView *pageView)
{
    m_pageView = pageView;
}

void Layers::saveSearchOptions()
{
    Okular::Settings::setLayersSearchRegularExpression( m_searchLine->regularExpression() );
    Okular::Settings::setLayersSearchCaseSensitive( m_searchLine->caseSensitivity() == Qt::CaseSensitive ? true : false );
    Okular::Settings::self()->save();
}