/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of Qt Creator.
**
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
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** information use the contact form at https://www.qt.io/contact-us.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 as published by the Free Software
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
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****************************************************************************/

#include "importswidget.h"
#include "importlabel.h"
#include "importmanagercombobox.h"

#include <utils/algorithm.h>

#include <QVBoxLayout>
#include <QComboBox>

namespace QmlDesigner {

ImportsWidget::ImportsWidget(QWidget *parent) :
    QWidget(parent)
{
    setWindowTitle(tr("Import Manager"));
    m_addImportComboBox = new ImportManagerComboBox(this);
    connect(m_addImportComboBox, static_cast<void(QComboBox::*)(int)>(&QComboBox::activated),
            this, &ImportsWidget::addSelectedImport);
}

void ImportsWidget::removeImports()
{
    qDeleteAll(m_importLabels);
    m_importLabels.clear();
    updateLayout();
}

static bool isImportAlreadyUsed(const Import &import, QList<ImportLabel*> importLabels)
{
    foreach (ImportLabel *importLabel, importLabels) {
        if (importLabel->import() == import)
            return true;
    }

    return false;
}

static bool importLess(const Import &firstImport, const Import &secondImport)
{
    if (firstImport.url() == secondImport.url())
        return firstImport.toString() < secondImport.toString();

    if (firstImport.url() == "QtQuick")
        return true;

    if (secondImport.url() == "QtQuick")
        return false;

    if (firstImport.isLibraryImport() && secondImport.isFileImport())
        return false;

    if (firstImport.isFileImport() && secondImport.isLibraryImport())
        return true;

    if (firstImport.isFileImport() && secondImport.isFileImport())
        return QString::localeAwareCompare(firstImport.file(), secondImport.file()) < 0;

    if (firstImport.isLibraryImport() && secondImport.isLibraryImport())
        return QString::localeAwareCompare(firstImport.url(), secondImport.url()) < 0;

    return false;
}

void ImportsWidget::setPossibleImports(QList<Import> possibleImports)
{
    Utils::sort(possibleImports, importLess);
    m_addImportComboBox->clear();
    foreach (const Import &possibleImport, possibleImports) {
        if (!isImportAlreadyUsed(possibleImport, m_importLabels))
            m_addImportComboBox->addItem(possibleImport.toString(true), QVariant::fromValue(possibleImport));
    }
}

void ImportsWidget::removePossibleImports()
{
    m_addImportComboBox->clear();
}

void ImportsWidget::setUsedImports(const QList<Import> &usedImports)
{
    foreach (ImportLabel *importLabel, m_importLabels)
        importLabel->setReadOnly(usedImports.contains(importLabel->import()));

}

void ImportsWidget::removeUsedImports()
{
    foreach (ImportLabel *importLabel, m_importLabels)
        importLabel->setEnabled(true);
}

void ImportsWidget::setImports(const QList<Import> &imports)
{
    qDeleteAll(m_importLabels);
    m_importLabels.clear();

    QList<Import> sortedImports = imports;

    Utils::sort(sortedImports, importLess);

    foreach (const Import &import, sortedImports) {
        ImportLabel *importLabel = new ImportLabel(this);
        importLabel->setImport(import);
        m_importLabels.append(importLabel);
        connect(importLabel, &ImportLabel::removeImport, this, &ImportsWidget::removeImport);
    }

    updateLayout();
}


void ImportsWidget::updateLayout()
{
    delete layout();

    QVBoxLayout *layout = new QVBoxLayout(this);
    layout->setSpacing(0);

    layout->addWidget(m_addImportComboBox);

    foreach (ImportLabel *importLabel, m_importLabels)
        layout->addWidget(importLabel);

    layout->addStretch();
}

void ImportsWidget::addSelectedImport(int addImportComboBoxIndex)
{
    Import selectedImport = m_addImportComboBox->itemData(addImportComboBoxIndex).value<Import>();

    if (selectedImport.isEmpty())
        return;

    emit addImport(selectedImport);
}

} // namespace QmlDesigner
