/**************************************************************************
**
** This file is part of Installer Framework
**
** Copyright (c) 2011-2012 Nokia Corporation and/or its subsidiary(-ies).
**
** Contact: Nokia Corporation (qt-info@nokia.com)
**
**
** 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.
**
** Other Usage
**
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**************************************************************************/

#include "performinstallationform.h"

#include "lazyplaintextedit.h"
#include "progresscoordinator.h"


#include <QtGui/QLabel>
#include <QtGui/QProgressBar>
#include <QtGui/QPushButton>
#include <QtGui/QScrollBar>
#include <QtGui/QVBoxLayout>

#include <QtCore/QTimer>

using namespace QInstaller;

// -- PerformInstallationForm

PerformInstallationForm::PerformInstallationForm(QObject *parent)
    : QObject(parent),
      m_progressBar(0),
      m_progressLabel(0),
      m_detailsButton(0),
      m_detailsBrowser(0),
      m_updateTimer(0)
{
}

void PerformInstallationForm::setupUi(QWidget *widget)
{
    QVBoxLayout *baseLayout = new QVBoxLayout(widget);
    baseLayout->setObjectName(QLatin1String("BaseLayout"));

    QVBoxLayout *topLayout = new QVBoxLayout();
    topLayout->setObjectName(QLatin1String("TopLayout"));

    m_progressBar = new QProgressBar(widget);
    m_progressBar->setRange(1, 100);
    m_progressBar->setObjectName(QLatin1String("ProgressBar"));
    topLayout->addWidget(m_progressBar);

    m_progressLabel = new QLabel(widget);
    m_progressLabel->setObjectName(QLatin1String("ProgressLabel"));
    m_progressLabel->setSizePolicy(QSizePolicy::MinimumExpanding, QSizePolicy::Minimum);
    topLayout->addWidget(m_progressLabel);

    m_downloadStatus = new QLabel(widget);
    m_downloadStatus->setObjectName(QLatin1String("DownloadStatus"));
    m_downloadStatus->setSizePolicy(QSizePolicy::MinimumExpanding, QSizePolicy::Minimum);
    topLayout->addWidget(m_downloadStatus);
    connect(ProgressCoordinator::instance(), SIGNAL(downloadStatusChanged(QString)), this,
        SLOT(onDownloadStatusChanged(QString)));

    m_detailsButton = new QPushButton(tr("&Show Details"), widget);
    m_detailsButton->setObjectName(QLatin1String("DetailsButton"));
    m_detailsButton->setSizePolicy(QSizePolicy::Maximum, QSizePolicy::Fixed);
    connect(m_detailsButton, SIGNAL(clicked()), this, SLOT(toggleDetails()));
    topLayout->addWidget(m_detailsButton);

    QVBoxLayout *bottomLayout = new QVBoxLayout();
    bottomLayout->setObjectName(QLatin1String("BottomLayout"));
    bottomLayout->addStretch();

    m_detailsBrowser = new LazyPlainTextEdit(widget);
    m_detailsBrowser->setReadOnly(true);
    m_detailsBrowser->setWordWrapMode(QTextOption::NoWrap);
    m_detailsBrowser->setObjectName(QLatin1String("DetailsBrowser"));
    m_detailsBrowser->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
    bottomLayout->addWidget(m_detailsBrowser);

    bottomLayout->setStretch(1, 10);
    baseLayout->addLayout(topLayout);
    baseLayout->addLayout(bottomLayout);

    m_updateTimer = new QTimer(widget);
    connect(m_updateTimer, SIGNAL(timeout()), this, SLOT(updateProgress())); //updateProgress includes label
    m_updateTimer->setInterval(30);
}

void PerformInstallationForm::setDetailsWidgetVisible(bool visible)
{
    m_detailsButton->setVisible(visible);
}

void PerformInstallationForm::appendProgressDetails(const QString &details)
{
    m_detailsBrowser->append(details);
}

void PerformInstallationForm::updateProgress()
{
    QInstaller::ProgressCoordinator *progressCoordninator = QInstaller::ProgressCoordinator::instance();
    const int progressPercentage = progressCoordninator->progressInPercentage();

    m_progressBar->setRange(0, 100);
    m_progressBar->setValue(progressPercentage);
    m_progressLabel->setText(m_progressLabel->fontMetrics().elidedText(progressCoordninator->labelText(),
        Qt::ElideRight, m_progressLabel->width()));
}

void PerformInstallationForm::toggleDetails()
{
    const bool willShow = !isShowingDetails();
    m_detailsButton->setText(willShow ? tr("&Hide Details") : tr("&Show Details"));

    if (willShow)
        scrollDetailsToTheEnd();

    m_detailsBrowser->setVisible(willShow);
    emit showDetailsChanged();
}

void PerformInstallationForm::clearDetailsBrowser()
{
    m_detailsBrowser->clear();
}

void PerformInstallationForm::enableDetails()
{
    m_detailsButton->setEnabled(true);
    m_detailsButton->setText(tr("&Show Details"));
    m_detailsBrowser->setVisible(false);
}

void PerformInstallationForm::startUpdateProgress()
{
    m_updateTimer->start();
    updateProgress();
}

void PerformInstallationForm::stopUpdateProgress()
{
    m_updateTimer->stop();
    updateProgress();
}

void PerformInstallationForm::setDetailsButtonEnabled(bool enable)
{
    m_detailsButton->setEnabled(enable);
}

void PerformInstallationForm::scrollDetailsToTheEnd()
{
    m_detailsBrowser->horizontalScrollBar()->setValue(0);
    m_detailsBrowser->verticalScrollBar()->setValue(m_detailsBrowser->verticalScrollBar()->maximum());
}

bool PerformInstallationForm::isShowingDetails() const
{
    return m_detailsBrowser->isVisible();
}

void PerformInstallationForm::onDownloadStatusChanged(const QString &status)
{
    m_downloadStatus->setText(m_downloadStatus->fontMetrics().elidedText(status, Qt::ElideRight,
        m_downloadStatus->width()));
}