/*
  This file is part of KOrganizer.

  Copyright (c) 2004 Till Adam <adam@kde.org>
  Copyright (c) 2005 Rafal Rzepecki <divide@users.sourceforge.net>
  Copyright (c) 2008 Thomas Thrainer <tom_t@gmx.at>

  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.

  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 General Public License for more details.

  You should have received a copy of the GNU General Public License along
  with this program; if not, write to the Free Software Foundation, Inc.,
  51 Franklin Street, Fifth Floor,
  Boston, MA 02110-1301, USA.

  As a special exception, permission is given to link this program
  with any edition of Qt, and distribute the resulting executable,
  without including the source code for Qt in the source distribution.
*/

#include "todoviewquicksearch.h"
#include <calendarsupport/kcalprefs.h>

#include <Akonadi/Calendar/ETMCalendar>
#include <calendarsupport/categoryconfig.h>

#include <libkdepim/widgets/kcheckcombobox.h>
#include <libkdepim/widgets/tagwidgets.h>

#include <calendarsupport/categoryhierarchyreader.h>

#include <KCalCore/CalFilter>

#include <KLineEdit>
#include <KLocalizedString>

#include <QHBoxLayout>

TodoViewQuickSearch::TodoViewQuickSearch( const Akonadi::ETMCalendar::Ptr &calendar,
                                          QWidget *parent )
  : QWidget( parent ), mCalendar( calendar )
{
  QHBoxLayout *layout = new QHBoxLayout( this );
  // no special margin because it is added by the view
  layout->setContentsMargins( 0, 0, 0, 0 );

  mSearchLine = new KLineEdit( this );
  mSearchLine->setToolTip(
    i18nc( "@info:tooltip", "Filter on matching summaries" ) );
  mSearchLine->setWhatsThis(
    i18nc( "@info:whatsthis",
           "Enter text here to filter the to-dos that are shown by matching summaries." ) );
  mSearchLine->setClickMessage( i18nc( "@label in QuickSearchLine", "Search Summaries" ) );
  mSearchLine->setClearButtonShown( true );
  connect( mSearchLine, SIGNAL(textChanged(QString)),
           this, SIGNAL(searchTextChanged(QString)) );

  layout->addWidget( mSearchLine, 3 );

  mCategoryCombo = new KPIM::TagSelectionCombo( this );
  mCategoryCombo->setToolTip(
    i18nc( "@info:tooltip", "Filter on these categories" ) );
  mCategoryCombo->setWhatsThis(
    i18nc( "@info:whatsthis",
           "Use this combobox to filter the to-dos that are shown by "
           "a list of selected categories." ) );
  const QString defaultText = i18nc( "@item:inlistbox", "Select Categories" );
  mCategoryCombo->setDefaultText( defaultText );
  mCategoryCombo->setSeparator( i18nc( "@item:intext delimiter for joining category names", "," ) );

  connect( mCategoryCombo, SIGNAL(checkedItemsChanged(QStringList)),
           SLOT(emitFilterCategoryChanged()) );

  layout->addWidget( mCategoryCombo, 1 );

  { // Make the combo big enough so that "Select Categories" fits.
    QFontMetrics fm = mCategoryCombo->lineEdit()->fontMetrics();

    // QLineEdit::sizeHint() returns a nice size to fit 17 'x' chars.
    const int currentPreferedWidth = mCategoryCombo->lineEdit()->sizeHint().width();

    // Calculate a nice size for "Select Categories"
    const int newPreferedWidth = currentPreferedWidth -
                                 fm.width( QLatin1Char( 'x' ) ) * 17 +
                                 fm.width( defaultText );

    const int pixelsToAdd = newPreferedWidth - mCategoryCombo->lineEdit()->width();
    mCategoryCombo->setMinimumWidth( mCategoryCombo->width() + pixelsToAdd );
  }

  mPriorityCombo = new KPIM::KCheckComboBox( this );
  mPriorityCombo->setToolTip(
    i18nc( "@info:tooltip", "Filter on these priorities" ) );
  mPriorityCombo->setWhatsThis(
    i18nc( "@info:whatsthis",
           "Use this combobox to filter the to-dos that are shown by "
           "a list of selected priorities." ) );
  mPriorityCombo->setDefaultText( i18nc( "@item:inlistbox", "Select Priority" ) );
  connect( mPriorityCombo,SIGNAL(checkedItemsChanged(QStringList)),
           SLOT(emitFilterPriorityChanged()) );

  layout->addWidget( mPriorityCombo, 1 );
  fillPriorities();

  setLayout( layout );
}

void TodoViewQuickSearch::setCalendar( const Akonadi::ETMCalendar::Ptr &calendar )
{
  if ( calendar != mCalendar ) {
    mCalendar = calendar;
  }
}

void TodoViewQuickSearch::reset()
{
  mSearchLine->clear();
  mCategoryCombo->setCurrentIndex( 0 );
  mPriorityCombo->setCurrentIndex( 0 );
}

void TodoViewQuickSearch::fillPriorities()
{
  QStringList priorityValues;
  priorityValues.append( i18nc( "@action:inmenu priority is unspecified", "unspecified" ) );
  priorityValues.append( i18nc( "@action:inmenu highest priority", "%1 (highest)", 1 ) );
  for ( int p = 2; p < 10; ++p ) {
    if ( p == 5 ) {
      priorityValues.append( i18nc( "@action:inmenu medium priority", "%1 (medium)", p ) );
    } else if ( p == 9 ) {
      priorityValues.append( i18nc( "@action:inmenu lowest priority", "%1 (lowest)", p ) );
    } else {
      priorityValues.append( i18nc( "@action:inmenu", "%1", p ) );
    }
  }
  // TODO: Using the same method as for categories to fill mPriorityCombo
  CalendarSupport::CategoryHierarchyReaderQComboBox( mPriorityCombo ).read( priorityValues );
}

void TodoViewQuickSearch::emitFilterCategoryChanged()
{
  emit filterCategoryChanged( mCategoryCombo->checkedItems() );
}

void TodoViewQuickSearch::emitFilterPriorityChanged()
{
  emit filterPriorityChanged( mPriorityCombo->checkedItems( Qt::UserRole ) );
}

