/*
 *   Copyright (C) 2008 Peter Grasch <peter.grasch@bedahr.org>
 *
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License version 2,
 *   or (at your option) any later version, 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 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.
 */

#include "commandlistwidget.h"
#include "actionmanager.h"
#include <QObject>
#include <KPushButton>
#include <QVBoxLayout>
#include <QTableWidget>
#include <QTableWidgetItem>
#include <QTableWidgetSelectionRange>
#include <QHeaderView>
#include <QApplication>
#include <QDesktopWidget>
#include <QProgressBar>
#include <QVariant>
#include <KIcon>
#include <KLocalizedString>
#include <simonscenarios/voiceinterfacecommand.h>

CommandListWidget::CommandListWidget() : QWidget(0, Qt::Dialog|Qt::WindowStaysOnTopHint),
pbCancel(new KPushButton(this)),
twCommands(new QTableWidget(this)),
pbAutomaticSelection(new QProgressBar(this)),
indexToSelectAfterTimeout(-1)
{
  QVBoxLayout *lay = new QVBoxLayout(this);

  lay->setMargin(0);
  lay->setSpacing(0);

  pbCancel->setText(i18n("Cancel"));
  pbCancel->setIcon(KIcon("dialog-cancel"));

  setFont(ActionManager::getInstance()->pluginBaseFont());

  twCommands->verticalHeader()->hide();
  if (twCommands->columnCount() < 2)
    twCommands->setColumnCount(2);
  QTableWidgetItem *__qtablewidgetitem = new QTableWidgetItem();
  twCommands->setHorizontalHeaderItem(0, __qtablewidgetitem);
  QTableWidgetItem *__qtablewidgetitem1 = new QTableWidgetItem();
  twCommands->setHorizontalHeaderItem(1, __qtablewidgetitem1);
  twCommands->setObjectName(QString::fromUtf8("twCommands"));
  twCommands->setSelectionMode(QAbstractItemView::SingleSelection);
  twCommands->setSelectionBehavior(QAbstractItemView::SelectRows);

  QTableWidgetItem *___qtablewidgetitem = twCommands->horizontalHeaderItem(0);
  ___qtablewidgetitem->setText(tr2i18n("Number", 0));
  QTableWidgetItem *___qtablewidgetitem1 = twCommands->horizontalHeaderItem(1);
  ___qtablewidgetitem1->setText(tr2i18n("Command", 0));

  lay->addWidget(twCommands);
  lay->addWidget(pbAutomaticSelection);
  lay->addWidget(pbCancel);
  setLayout(lay);

  connect(twCommands, SIGNAL(itemActivated(QTableWidgetItem*)), this, SLOT(runCommand()));
  connect(pbCancel, SIGNAL(clicked()), this, SLOT(close()));

  connect(&toggleAfterTimeoutTimer, SIGNAL(timeout()), this, SLOT(timeoutReached()));
  connect(&blinkTimer, SIGNAL(timeout()), this, SLOT(blink()));
  runRequestEmitted = false;
  pbAutomaticSelection->setFormat(i18n("Automatic selection"));
  pbAutomaticSelection->hide();
}


void CommandListWidget::adaptToVoiceElement(CommandListElements::Element element, VoiceInterfaceCommand* command)
{
  int startIndex = (currentFlags & HasBack) ? 1 : 0;

  int row = -1;

  switch (element) {
    case CommandListElements::Back: row = 0;
    break;
    case CommandListElements::One: row = startIndex + 0;
    break;
    case CommandListElements::Two: row = startIndex + 1;
    break;
    case CommandListElements::Three: row = startIndex + 2;
    break;
    case CommandListElements::Four: row = startIndex + 3;
    break;
    case CommandListElements::Five: row = startIndex + 4;
    break;
    case CommandListElements::Six: row = startIndex + 5;
    break;
    case CommandListElements::Seven: row = startIndex + 6;
    break;
    case CommandListElements::Eight: row = startIndex + 7;
    break;
    case CommandListElements::Next: row = startIndex + 8;
    break;
    case CommandListElements::Cancel:
      if (!command) {
        pbCancel->hide();
        return;
      }

      pbCancel->setText(command->visibleTrigger());
      if (command->showIcon())
        pbCancel->setIcon(KIcon(command->getIconSrc()));
      else pbCancel->setIcon(KIcon());
      pbCancel->show();
      return;
  }

  if (twCommands->rowCount() < row)
    return;

  if (!command) {
    if ((element == CommandListElements::Back) && (!(currentFlags & HasBack)))
      return;

    twCommands->hideRow(row);
    return;
  }

  QTableWidgetItem *item = twCommands->item(row,0);
  if (!item) return;

  item->setText(command->visibleTrigger());
  if (command->showIcon())
    item->setIcon(KIcon(command->getIconSrc()));
  else item->setIcon(KIcon());
}


void CommandListWidget::runRequestSent()
{
  runRequestEmitted = true;
}


void CommandListWidget::runCommand()
{
  toggleAfterTimeoutTimer.stop();
  blinkTimer.stop();

  int row;
  //	if (indexToSelectAfterTimeout != -1) {
  //		row = indexToSelectAfterTimeout;
  //		indexToSelectAfterTimeout = -1;
  //	} else {
  row = twCommands->currentRow();

  if (row == -1) {
    kDebug() << "no row selected";
    return;
  }
  //	}

  //even if we do not have a back-button the commands
  //start at 0
  if ((!(currentFlags & HasBack)))
    row++;

  runRequestEmitted = true;
  emit runRequest(row);
  pbAutomaticSelection->hide();
}


void CommandListWidget::setFont(const QFont& font)
{
  QWidget::setFont(font);
  resizeToFit();
}


void CommandListWidget::showEvent(QShowEvent *)
{
  pbAutomaticSelection->hide();

  resizeToFit();
}


void CommandListWidget::closeEvent(QCloseEvent *)
{
  if (!runRequestEmitted) {
    kDebug() << "Emitting cancel...\n";
    emit canceled();
  }
  toggleAfterTimeoutTimer.stop();
  blinkTimer.stop();
  indexToSelectAfterTimeout = -1;
}


void CommandListWidget::init(const QStringList& iconsrcs, const QStringList commands, Flags flags)
{
  if (commands.count() == 0) return;

  Q_ASSERT(commands.count() == iconsrcs.count());

  currentFlags = flags;
  int rowCount = commands.count();
  int rowInsertionModifier=0;
  if (flags & HasNext)
    rowCount++;
  if (flags & HasBack) {
    rowCount++;
    rowInsertionModifier=1;
  }
  //showing list
  twCommands->setRowCount(rowCount);

  if (flags & HasBack) {
    QTableWidgetItem *num = new QTableWidgetItem(QString::number(0));
    num->setFlags(Qt::ItemIsSelectable|Qt::ItemIsEnabled);
    QTableWidgetItem *com = new QTableWidgetItem(KIcon("go-previous"), i18nc("Go to the previous list of commands", "Back"));
    com->setFlags(Qt::ItemIsSelectable|Qt::ItemIsEnabled);
    twCommands->setItem(0, 0, num);
    twCommands->setItem(0, 1, com);

  }

  int i;
  for (i=rowInsertionModifier; i-rowInsertionModifier<commands.count();i++) {
    QString command = commands[i-rowInsertionModifier];
    QString iconsrc = iconsrcs[i-rowInsertionModifier];

    QTableWidgetItem *num = new QTableWidgetItem(QString::number(i-rowInsertionModifier+1));
    num->setFlags(Qt::ItemIsSelectable|Qt::ItemIsEnabled);
    QTableWidgetItem *com = new QTableWidgetItem(KIcon(iconsrc), command);
    com->setFlags(Qt::ItemIsSelectable|Qt::ItemIsEnabled);
    twCommands->setItem(i, 0, num);
    twCommands->setItem(i, 1, com);
  }
  if (flags & HasNext) {
    QTableWidgetItem *num = new QTableWidgetItem(QString::number(i-rowInsertionModifier+1));
    num->setFlags(Qt::ItemIsSelectable|Qt::ItemIsEnabled);
    QTableWidgetItem *com = new QTableWidgetItem(KIcon("go-next"), i18nc("Go to the next list of commands", "Next"));
    com->setFlags(Qt::ItemIsSelectable|Qt::ItemIsEnabled);
    twCommands->setItem(i, 0, num);
    twCommands->setItem(i, 1, com);

  }
  resizeToFit();
  runRequestEmitted = false;
}


void CommandListWidget::resizeToFit()
{
  twCommands->resizeColumnsToContents();

  QHeaderView *vhview = twCommands->verticalHeader();
  QHeaderView *hhview = twCommands->horizontalHeader();
  resize(QSize(hhview->sectionSize(0)+hhview->sectionSize(1)+25,
    (twCommands->rowCount()*vhview->sectionSize(0))+pbCancel->height()+pbAutomaticSelection->height()+40));

  //move to center of screen
  QDesktopWidget* tmp = QApplication::desktop();
  int x,y;
  x=(tmp->width()/2) - (width()/2);
  y=(tmp->height()/2)-(height()/2);

  move(x,y);
}


void CommandListWidget::blink()
{
  int selectionValue = pbAutomaticSelection->value();
  if ((selectionValue % 15) == 0)
    selectAfterTimeoutIndex(twCommands->currentRow() != indexToSelectAfterTimeout);
  pbAutomaticSelection->setValue(selectionValue+1);
}


void CommandListWidget::selectAfterTimeoutIndex(bool select)
{
  if (select)
    twCommands->setCurrentCell(indexToSelectAfterTimeout, 0);
  else
    twCommands->setCurrentCell(-1, -1);
}


void CommandListWidget::abortTimeoutSelection()
{
  toggleAfterTimeoutTimer.stop();
  blinkTimer.stop();
  indexToSelectAfterTimeout = -1;
  pbAutomaticSelection->hide();
}


void CommandListWidget::selectAfterTimeout(int index, int timeout /* in ms */)
{
  if ((!(currentFlags & HasBack)))
    index--;

  indexToSelectAfterTimeout = index;
  toggleAfterTimeoutTimer.start(timeout);
  selectAfterTimeoutIndex(true);
  blinkTimer.start(50);

  pbAutomaticSelection->setMaximum(qRound(((double)timeout) / 50.0f));
  pbAutomaticSelection->setValue(0);
  pbAutomaticSelection->show();
}


void CommandListWidget::timeoutReached()
{
  selectAfterTimeoutIndex(true);
  runCommand();
}


CommandListWidget::~CommandListWidget()
{
}
