/*
    Copyright (C) 2001,2002 Carsten Pfeiffer <pfeiffer@kde.org>
    Copyright (C) 2001 Michael Jarrett <michaelj@corel.com>
    Copyright (C) 2009 Shaun Reich <shaun.reich@kdemail.net>

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Library General Public
    License version 2 as published by the Free Software Foundation.

    This library 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
    Library General Public License for more details.

    You should have received a copy of the GNU Library General Public License
    along with this library; see the file COPYING.LIB.  If not, write to
    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
    Boston, MA 02110-1301, USA.
*/

#include "kdirselectdialog.h"

#include <QDebug>
#include <QDialogButtonBox>
#include <QDir>
#include <QFileDialog>
#include <QInputDialog>
#include <QLayout>
#include <QMenu>
#include <QPushButton>
#include <QStandardPaths>
#include <QStringList>
#include <QUrl>

#include <kio/jobuidelegate.h>
#include <kactioncollection.h>
#include <kauthorized.h>
#include <kconfig.h>
#include <kconfiggroup.h>
#include <kfiletreeview_p.h>
#include <kfileitemdelegate.h>
#include <khistorycombobox.h>
#include <kio/job.h>
#include <kio/deletejob.h>
#include <kio/copyjob.h>
#include <kio/mkdirjob.h>
#include <kjobwidgets.h>
#include <klocalizedstring.h>
#include <kmessagebox.h>
#include <kpropertiesdialog.h>
#include <krecentdirs.h>
#include <kservice.h>
#include <ksharedconfig.h>
#include <ktoggleaction.h>
#include <kurlcompletion.h>
#include <kurlpixmapprovider.h>
#include <kfilewidget.h>

#include "kfileplacesview.h"
#include "kfileplacesmodel.h"
// ### add mutator for treeview!

class KDirSelectDialog::Private
{
public:
    Private(bool localOnly, KDirSelectDialog *parent)
        : m_parent(parent),
          m_localOnly(localOnly),
          m_comboLocked(false),
          m_urlCombo(0)
    {
    }

    void readConfig(const KSharedConfigPtr &config, const QString &group);
    void saveConfig(KSharedConfigPtr config, const QString &group);
    void slotMkdir();

    void slotCurrentChanged();
    void slotExpand(const QModelIndex &);
    void slotUrlActivated(const QString &);
    void slotComboTextChanged(const QString &);
    void slotContextMenuRequested(const QPoint &);
    void slotNewFolder();
    void slotMoveToTrash();
    void slotDelete();
    void slotProperties();

    KDirSelectDialog *m_parent;
    bool m_localOnly : 1;
    bool m_comboLocked : 1;
    QUrl m_rootUrl;
    QUrl m_startDir;
    KFileTreeView *m_treeView;
    QMenu *m_contextMenu;
    KActionCollection *m_actions;
    KFilePlacesView *m_placesView;
    KHistoryComboBox *m_urlCombo;
    QString m_recentDirClass;
    QUrl m_startURL;
    QAction *moveToTrash;
    QAction *deleteAction;
    QAction *showHiddenFoldersAction;
};

void KDirSelectDialog::Private::readConfig(const KSharedConfig::Ptr &config, const QString &group)
{
    m_urlCombo->clear();

    KConfigGroup conf(config, group);
    m_urlCombo->setHistoryItems(conf.readPathEntry("History Items", QStringList()));

    const QSize size = conf.readEntry("DirSelectDialog Size", QSize());
    if (size.isValid()) {
        m_parent->resize(size);
    }
}

void KDirSelectDialog::Private::saveConfig(KSharedConfig::Ptr config, const QString &group)
{
    KConfigGroup conf(config, group);
    KConfigGroup::WriteConfigFlags flags(KConfigGroup::Persistent | KConfigGroup::Global);
    conf.writePathEntry("History Items", m_urlCombo->historyItems(), flags);
    conf.writeEntry("DirSelectDialog Size", m_parent->size(), flags);

    config->sync();
}

void KDirSelectDialog::Private::slotMkdir()
{
    bool ok;
    QString where = m_parent->url().toDisplayString(QUrl::PreferLocalFile);
    QString name = i18nc("folder name", "New Folder");
    if (m_parent->url().isLocalFile() && QFileInfo(m_parent->url().toLocalFile() + '/' + name).exists()) {
        name = KIO::suggestName(m_parent->url(), name);
    }

    QString directory = KIO::encodeFileName(QInputDialog::getText(m_parent, i18nc("@title:window", "New Folder"),
                                            i18nc("@label:textbox", "Create new folder in:\n%1",  where),
                                            QLineEdit::Normal, name, &ok));
    if (!ok) {
        return;
    }

    bool selectDirectory = true;
    bool writeOk = false;
    bool exists = false;
    QUrl folderurl(m_parent->url());

    const QStringList dirs = directory.split('/', QString::SkipEmptyParts);
    QStringList::ConstIterator it = dirs.begin();

    for (; it != dirs.end(); ++it) {
        folderurl.setPath(folderurl.path() + '/' + *it);
        KIO::StatJob *job = KIO::stat(folderurl);
        KJobWidgets::setWindow(job, m_parent);
        job->setDetails(0); //We only want to know if it exists, 0 == that.
        job->setSide(KIO::StatJob::DestinationSide);
        exists = job->exec();
        if (!exists) {
            KIO::MkdirJob *job = KIO::mkdir(folderurl);
            KJobWidgets::setWindow(job, m_parent);
            writeOk = job->exec();
        }
    }

    if (exists) { // url was already existent
        QString which = folderurl.toDisplayString(QUrl::PreferLocalFile);
        KMessageBox::sorry(m_parent, i18n("A file or folder named %1 already exists.", which));
        selectDirectory = false;
    } else if (!writeOk) {
        KMessageBox::sorry(m_parent, i18n("You do not have permission to create that folder."));
    } else if (selectDirectory) {
        m_parent->setCurrentUrl(folderurl);
    }
}

void KDirSelectDialog::Private::slotCurrentChanged()
{
    if (m_comboLocked) {
        return;
    }

    const QUrl u = m_treeView->currentUrl();

    if (u.isValid()) {
        m_urlCombo->setEditText(u.toDisplayString(QUrl::PreferLocalFile));
    } else {
        m_urlCombo->setEditText(QString());
    }
}

void KDirSelectDialog::Private::slotUrlActivated(const QString &text)
{
    if (text.isEmpty()) {
        return;
    }

    const QUrl url = QUrl::fromUserInput(text);
    m_urlCombo->addToHistory(url.toDisplayString());

    if (m_parent->localOnly() && !url.isLocalFile()) {
        return;    //FIXME: messagebox for the user
    }

    QUrl oldUrl = m_treeView->currentUrl();
    if (oldUrl.isEmpty()) {
        oldUrl = m_startDir;
    }

    m_parent->setCurrentUrl(oldUrl);
}

void KDirSelectDialog::Private::slotComboTextChanged(const QString &text)
{
    m_treeView->blockSignals(true);
    QUrl url = QUrl::fromUserInput(text);
#ifdef Q_OS_WIN
    QUrl rootUrl(m_treeView->rootUrl());
    if (url.isLocalFile() && !rootUrl.isParentOf(url) && !rootUrl.matches(url, QUrl::StripTrailingSlash)) {
        QUrl tmp = KIO::upUrl(url);
        while (tmp.path().length() > 1) {
            url = tmp;
            tmp = KIO::upUrl(url);
        }
        m_treeView->setRootUrl(url);
    }
#endif
    m_treeView->setCurrentUrl(url);
    m_treeView->blockSignals(false);
}

void KDirSelectDialog::Private::slotContextMenuRequested(const QPoint &pos)
{
    m_contextMenu->popup(m_treeView->viewport()->mapToGlobal(pos));
}

void KDirSelectDialog::Private::slotExpand(const QModelIndex &index)
{
    m_treeView->setExpanded(index, !m_treeView->isExpanded(index));
}

void KDirSelectDialog::Private::slotNewFolder()
{
    slotMkdir();
}

void KDirSelectDialog::Private::slotMoveToTrash()
{
    const QUrl url = m_treeView->selectedUrl();
    KIO::JobUiDelegate job;
    if (job.askDeleteConfirmation(QList<QUrl>() << url, KIO::JobUiDelegate::Trash, KIO::JobUiDelegate::DefaultConfirmation)) {
        KIO::CopyJob *copyJob = KIO::trash(url);
        KJobWidgets::setWindow(copyJob, m_parent);
        copyJob->ui()->setAutoErrorHandlingEnabled(true);
    }
}

void KDirSelectDialog::Private::slotDelete()
{
    const QUrl url = m_treeView->selectedUrl();
    KIO::JobUiDelegate job;
    if (job.askDeleteConfirmation(QList<QUrl>() << url, KIO::JobUiDelegate::Delete, KIO::JobUiDelegate::DefaultConfirmation)) {
        KIO::DeleteJob *deleteJob = KIO::del(url);
        KJobWidgets::setWindow(deleteJob, m_parent);
        deleteJob->ui()->setAutoErrorHandlingEnabled(true);
    }
}

void KDirSelectDialog::Private::slotProperties()
{
    KPropertiesDialog *dialog = 0;
    dialog = new KPropertiesDialog(m_treeView->selectedUrl(), this->m_parent);
    dialog->setAttribute(Qt::WA_DeleteOnClose);
    dialog->show();
}

KDirSelectDialog::KDirSelectDialog(const QUrl &startDir, bool localOnly,
                                   QWidget *parent)
#ifdef Q_OS_WIN
    : QDialog(parent, Qt::WindowMinMaxButtonsHint),
#else
    : QDialog(parent),
#endif
      d(new Private(localOnly, this))
{
    setWindowTitle(i18nc("@title:window", "Select Folder"));

    QVBoxLayout *topLayout = new QVBoxLayout;
    setLayout(topLayout);

    QFrame *page = new QFrame(this);
    topLayout->addWidget(page);

    QPushButton *folderButton = new QPushButton;
    KGuiItem::assign(folderButton, KGuiItem(i18nc("@action:button", "New Folder..."), "folder-new"));
    connect(folderButton, SIGNAL(clicked()), this, SLOT(slotNewFolder()));

    QDialogButtonBox *buttonBox = new QDialogButtonBox(this);
    buttonBox->addButton(folderButton, QDialogButtonBox::ActionRole);
    buttonBox->setStandardButtons(QDialogButtonBox::Ok | QDialogButtonBox::Cancel);
    connect(buttonBox, SIGNAL(accepted()), this, SLOT(accept()));
    connect(buttonBox, SIGNAL(rejected()), this, SLOT(reject()));
    topLayout->addWidget(buttonBox);

    QHBoxLayout *hlay = new QHBoxLayout(page);
    hlay->setMargin(0);
    QVBoxLayout *mainLayout = new QVBoxLayout();
    d->m_actions = new KActionCollection(this);
    d->m_actions->addAssociatedWidget(this);
    d->m_placesView = new KFilePlacesView(page);
    d->m_placesView->setModel(new KFilePlacesModel(d->m_placesView));
    d->m_placesView->setObjectName(QLatin1String("speedbar"));
    d->m_placesView->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
    d->m_placesView->setSizePolicy(QSizePolicy::Minimum, QSizePolicy::Minimum);
    connect(d->m_placesView, SIGNAL(urlChanged(QUrl)),
            SLOT(setCurrentUrl(QUrl)));
    hlay->addWidget(d->m_placesView);
    hlay->addLayout(mainLayout);

    d->m_treeView = new KFileTreeView(page);
    d->m_treeView->setDirOnlyMode(true);
    d->m_treeView->setContextMenuPolicy(Qt::CustomContextMenu);

    for (int i = 1; i < d->m_treeView->model()->columnCount(); ++i) {
        d->m_treeView->hideColumn(i);
    }

    d->m_urlCombo = new KHistoryComboBox(page);
    d->m_urlCombo->setLayoutDirection(Qt::LeftToRight);
    d->m_urlCombo->setSizeAdjustPolicy(QComboBox::AdjustToMinimumContentsLength);
    d->m_urlCombo->setTrapReturnKey(true);
    d->m_urlCombo->setPixmapProvider(new KUrlPixmapProvider());
    KUrlCompletion *comp = new KUrlCompletion();
    comp->setMode(KUrlCompletion::DirCompletion);
    d->m_urlCombo->setCompletionObject(comp, true);
    d->m_urlCombo->setAutoDeleteCompletionObject(true);
    d->m_urlCombo->setDuplicatesEnabled(false);

    d->m_contextMenu = new QMenu(this);

    QAction *newFolder = new QAction(i18nc("@action:inmenu", "New Folder..."), this);
    d->m_actions->addAction(newFolder->objectName(), newFolder);
    newFolder->setIcon(QIcon::fromTheme("folder-new"));
    newFolder->setShortcut(Qt::Key_F10);
    connect(newFolder, SIGNAL(triggered(bool)), this, SLOT(slotNewFolder()));
    d->m_contextMenu->addAction(newFolder);

    d->moveToTrash = new QAction(i18nc("@action:inmenu", "Move to Trash"), this);
    d->m_actions->addAction(d->moveToTrash->objectName(), d->moveToTrash);
    d->moveToTrash->setIcon(QIcon::fromTheme("user-trash"));
    d->moveToTrash->setShortcut(Qt::Key_Delete);
    connect(d->moveToTrash, SIGNAL(triggered(bool)), this, SLOT(slotMoveToTrash()));
    d->m_contextMenu->addAction(d->moveToTrash);

    d->deleteAction = new QAction(i18nc("@action:inmenu", "Delete"), this);
    d->m_actions->addAction(d->deleteAction->objectName(), d->deleteAction);
    d->deleteAction->setIcon(QIcon::fromTheme("edit-delete"));
    d->deleteAction->setShortcut(Qt::SHIFT + Qt::Key_Delete);
    connect(d->deleteAction, SIGNAL(triggered(bool)), this, SLOT(slotDelete()));
    d->m_contextMenu->addAction(d->deleteAction);

    d->m_contextMenu->addSeparator();

    d->showHiddenFoldersAction = new KToggleAction(i18nc("@option:check", "Show Hidden Folders"), this);
    d->m_actions->addAction(d->showHiddenFoldersAction->objectName(), d->showHiddenFoldersAction);
    d->showHiddenFoldersAction->setShortcut(Qt::Key_F8);
    connect(d->showHiddenFoldersAction, SIGNAL(triggered(bool)), d->m_treeView, SLOT(setShowHiddenFiles(bool)));
    d->m_contextMenu->addAction(d->showHiddenFoldersAction);
    d->m_contextMenu->addSeparator();

    QAction *propertiesAction = new QAction(i18nc("@action:inmenu", "Properties"), this);
    d->m_actions->addAction(propertiesAction->objectName(), propertiesAction);
    propertiesAction->setIcon(QIcon::fromTheme("document-properties"));
    propertiesAction->setShortcut(Qt::ALT + Qt::Key_Return);
    connect(propertiesAction, SIGNAL(triggered(bool)), this, SLOT(slotProperties()));
    d->m_contextMenu->addAction(propertiesAction);

    d->m_startURL = KFileWidget::getStartUrl(startDir, d->m_recentDirClass);
    if (localOnly && !d->m_startURL.isLocalFile()) {
        d->m_startURL = QUrl();
        QString docPath = QStandardPaths::writableLocation(QStandardPaths::DocumentsLocation);
        if (QDir(docPath).exists()) {
            d->m_startURL.setPath(docPath);
        } else {
            d->m_startURL.setPath(QDir::homePath());
        }
    }

    d->m_startDir = d->m_startURL;
    d->m_rootUrl = d->m_treeView->rootUrl();

    d->readConfig(KSharedConfig::openConfig(), "DirSelect Dialog");

    mainLayout->addWidget(d->m_treeView, 1);
    mainLayout->addWidget(d->m_urlCombo, 0);

    connect(d->m_treeView, SIGNAL(currentChanged(QUrl)),
            SLOT(slotCurrentChanged()));
    connect(d->m_treeView, SIGNAL(activated(QModelIndex)),
            SLOT(slotExpand(QModelIndex)));
    connect(d->m_treeView, SIGNAL(customContextMenuRequested(QPoint)),
            SLOT(slotContextMenuRequested(QPoint)));

    connect(d->m_urlCombo, SIGNAL(editTextChanged(QString)),
            SLOT(slotComboTextChanged(QString)));
    connect(d->m_urlCombo, SIGNAL(activated(QString)),
            SLOT(slotUrlActivated(QString)));
    connect(d->m_urlCombo, SIGNAL(returnPressed(QString)),
            SLOT(slotUrlActivated(QString)));

    setCurrentUrl(d->m_startURL);
}

KDirSelectDialog::~KDirSelectDialog()
{
    delete d;
}

QUrl KDirSelectDialog::url() const
{
    QUrl comboUrl = QUrl::fromUserInput(d->m_urlCombo->currentText());

    if (comboUrl.isValid()) {
        KIO::StatJob *statJob = KIO::stat(comboUrl, KIO::HideProgressInfo);
        KJobWidgets::setWindow(statJob, d->m_parent);
        const bool ok = statJob->exec();
        if (ok && statJob->statResult().isDir()) {
            return comboUrl;
        }
    }

    // qDebug() << comboUrl.path() << " is not an accessible directory";
    return d->m_treeView->currentUrl();
}

QAbstractItemView *KDirSelectDialog::view() const
{
    return d->m_treeView;
}

bool KDirSelectDialog::localOnly() const
{
    return d->m_localOnly;
}

QUrl KDirSelectDialog::startDir() const
{
    return d->m_startDir;
}

void KDirSelectDialog::setCurrentUrl(const QUrl &url)
{
    if (!url.isValid()) {
        return;
    }

    if (url.scheme() != d->m_rootUrl.scheme()) {
        QUrl u(url);
        u.setPath("/");//NOTE portability?
        d->m_treeView->setRootUrl(u);
        d->m_rootUrl = u;
    }

    //Check if url represents a hidden folder and enable showing them
    QString fileName = url.fileName();
    //TODO a better hidden file check?
    bool isHidden = fileName.length() > 1 && fileName[0] == '.' &&
                    (fileName.length() > 2 ? fileName[1] != '.' : true);
    bool showHiddenFiles = isHidden && !d->m_treeView->showHiddenFiles();
    if (showHiddenFiles) {
        d->showHiddenFoldersAction->setChecked(true);
        d->m_treeView->setShowHiddenFiles(true);
    }

    d->m_treeView->setCurrentUrl(url);
}

void KDirSelectDialog::accept()
{
    QUrl selectedUrl = url();
    if (!selectedUrl.isValid()) {
        return;
    }

    if (!d->m_recentDirClass.isEmpty()) {
        KRecentDirs::add(d->m_recentDirClass, selectedUrl.toString());
    }

    d->m_urlCombo->addToHistory(selectedUrl.toDisplayString());
    KFileWidget::setStartDir(url());

    QDialog::accept();
}

void KDirSelectDialog::hideEvent(QHideEvent *event)
{
    d->saveConfig(KSharedConfig::openConfig(), "DirSelect Dialog");

    QDialog::hideEvent(event);
}

// static
QUrl KDirSelectDialog::selectDirectory(const QUrl &startDir,
                                       bool localOnly,
                                       QWidget *parent,
                                       const QString &caption)
{
    KDirSelectDialog myDialog(startDir, localOnly, parent);

    if (!caption.isNull()) {
        myDialog.setWindowTitle(caption);
    }

    if (myDialog.exec() == QDialog::Accepted) {
        QUrl url = myDialog.url();

        //Returning the most local url
        if (url.isLocalFile()) {
            return url;
        }

        KIO::StatJob *job = KIO::stat(url);
        KJobWidgets::setWindow(job, parent);

        if (!job->exec()) {
            return url;
        }

        KIO::UDSEntry entry = job->statResult();
        const QString path = entry.stringValue(KIO::UDSEntry::UDS_LOCAL_PATH);

        return path.isEmpty() ? url : QUrl::fromLocalFile(path);
    } else {
        return QUrl();
    }
}

#include "moc_kdirselectdialog.cpp"
