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**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of Qt Creator.
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** Alternatively, 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
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****************************************************************************/

#include "qtkitconfigwidget.h"

#include "qtsupportconstants.h"
#include "qtkitinformation.h"
#include "qtversionmanager.h"

#include <coreplugin/icore.h>
#include <projectexplorer/projectexplorerconstants.h>

#include <utils/qtcassert.h>

#include <QComboBox>
#include <QHBoxLayout>
#include <QPushButton>

namespace QtSupport {
namespace Internal {

QtKitConfigWidget::QtKitConfigWidget(ProjectExplorer::Kit *k, QWidget *parent) :
    ProjectExplorer::KitConfigWidget(parent),
    m_kit(k),
    m_combo(new QComboBox),
    m_manageButton(new QPushButton(this))
{
    setToolTip(tr("The Qt library to use for all projects using this kit.<br>"
                  "A Qt version is required for qmake-based projects and optional when using other build systems."));
    QHBoxLayout *layout = new QHBoxLayout(this);
    layout->setMargin(0);

    m_combo->setContentsMargins(0, 0, 0, 0);
    m_combo->setSizePolicy(QSizePolicy::MinimumExpanding, QSizePolicy::Fixed);
    layout->addWidget(m_combo);

    m_manageButton->setContentsMargins(0, 0, 0, 0);
    m_manageButton->setText(tr("Manage..."));

    QtVersionManager *mgr = QtVersionManager::instance();

    // initially populate combobox:
    m_combo->addItem(tr("None"), -1);
    QList<BaseQtVersion *> versions = mgr->validVersions();
    QList<int> versionIds;
    foreach (BaseQtVersion *v, versions)
        versionIds.append(v->uniqueId());
    versionsChanged(versionIds, QList<int>(), QList<int>());

    refresh();
    connect(m_combo, SIGNAL(currentIndexChanged(int)), this, SLOT(currentWasChanged(int)));

    connect(mgr, SIGNAL(qtVersionsChanged(QList<int>,QList<int>,QList<int>)),
            this, SLOT(versionsChanged(QList<int>,QList<int>,QList<int>)));

    connect(m_manageButton, SIGNAL(clicked()), this, SLOT(manageQtVersions()));
}

QString QtKitConfigWidget::displayName() const
{
    return tr("Qt version:");
}

void QtKitConfigWidget::makeReadOnly()
{
    m_combo->setEnabled(false);
}

void QtKitConfigWidget::refresh()
{
    m_combo->setCurrentIndex(findQtVersion(QtKitInformation::qtVersionId(m_kit)));
}

QWidget *QtKitConfigWidget::buttonWidget() const
{
    return m_manageButton;
}

void QtKitConfigWidget::versionsChanged(const QList<int> &added, const QList<int> &removed,
                                        const QList<int> &changed)
{
    QtVersionManager *mgr = QtVersionManager::instance();

    foreach (const int id, added) {
        BaseQtVersion *v = mgr->version(id);
        QTC_CHECK(v);
        QTC_CHECK(findQtVersion(id) < 0);
        m_combo->addItem(v->displayName(), id);
    }
    foreach (const int id, removed) {
        int pos = findQtVersion(id);
        QTC_CHECK(pos >= 0);
        m_combo->removeItem(pos);

    }
    foreach (const int id, changed) {
        BaseQtVersion *v = mgr->version(id);
        int pos = findQtVersion(id);
        QTC_CHECK(pos >= 0);
        m_combo->setItemText(pos, v->displayName());
    }
}

void QtKitConfigWidget::manageQtVersions()
{
    Core::ICore::showOptionsDialog(QLatin1String(ProjectExplorer::Constants::PROJECTEXPLORER_SETTINGS_CATEGORY),
                                   QLatin1String(QtSupport::Constants::QTVERSION_SETTINGS_PAGE_ID));
}

void QtKitConfigWidget::currentWasChanged(int idx)
{
    QtKitInformation::setQtVersionId(m_kit, m_combo->itemData(idx).toInt());
}

int QtKitConfigWidget::findQtVersion(const int id) const
{
    for (int i = 0; i < m_combo->count(); ++i) {
        if (id == m_combo->itemData(i).toInt())
            return i;
    }
    return -1;
}

} // namespace Internal
} // namespace QtSupport