/***************************************************************************
 *   Copyright (C) 2008 by Andreas Pakulat <apaku@gmx.de                   *
 *                                                                         *
 *   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.                                   *
 *                                                                         *
 ***************************************************************************/

#include "openprojectpage.h"

#include <QVBoxLayout>

#include <KDirOperator>
#include <KFileItem>
#include <KFileWidget>
#include <KLocalizedString>
#include <KUrlComboBox>

#include "shellextension.h"
#include "core.h"

namespace KDevelop
{

OpenProjectPage::OpenProjectPage( const QUrl& startUrl, const QStringList& filters,
    QWidget* parent )
        : QWidget( parent )
{
    auto* layout = new QVBoxLayout( this );
    layout->setContentsMargins(0, 0, 0, 0);

    fileWidget = new KFileWidget( startUrl, this);

    fileWidget->setFilter(filters.join(QLatin1Char('\n')));

    fileWidget->setMode( KFile::Modes( KFile::File | KFile::Directory | KFile::ExistingOnly ) );

    layout->addWidget( fileWidget );

    KDirOperator* ops = fileWidget->dirOperator();
    // Emitted for changes in the places view, the url navigator and when using the back/forward/up buttons
    connect(ops, &KDirOperator::urlEntered, this, &OpenProjectPage::opsEntered);

    // Emitted when selecting an entry from the "Name" box or editing in there
    connect( fileWidget->locationEdit(), &KUrlComboBox::editTextChanged,
             this, &OpenProjectPage::comboTextChanged);

    // Emitted when clicking on a file in the fileview area
    connect( fileWidget, &KFileWidget::fileHighlighted, this, &OpenProjectPage::highlightFile );

    connect(fileWidget->dirOperator()->dirLister(), QOverload<const QUrl&>::of(&KDirLister::completed),
            this, &OpenProjectPage::dirChanged);

    connect( fileWidget, &KFileWidget::accepted, this, &OpenProjectPage::accepted);
}

QUrl OpenProjectPage::absoluteUrl(const QString& file) const
{
    QUrl u(file);
    if( u.isRelative() )
    {
        u = fileWidget->baseUrl().resolved( u );
    }
    return u;
}

void OpenProjectPage::setUrl(const QUrl& url)
{
    fileWidget->setUrl(url, false);
}

void OpenProjectPage::dirChanged(const QUrl& /*url*/)
{
    if(fileWidget->selectedFiles().isEmpty()) {
        const KFileItemList items = fileWidget->dirOperator()->dirLister()->items();
        for (const KFileItem& item : items) {
            if(item.url().path().endsWith(ShellExtension::getInstance()->projectFileExtension()) && item.isFile()) {
                fileWidget->setSelectedUrl(item.url());
            }
        }
    }
}

void OpenProjectPage::showEvent(QShowEvent* ev)
{
    fileWidget->locationEdit()->setFocus();
    QWidget::showEvent(ev);
}

void OpenProjectPage::highlightFile(const QUrl& file)
{
    emit urlSelected(file);
}

void OpenProjectPage::opsEntered(const QUrl& url)
{
    emit urlSelected(url);
}

void OpenProjectPage::comboTextChanged( const QString& file )
{
    emit urlSelected(absoluteUrl(file));
}

}

