/*
 *   Copyright (C) 2000 Matthias Elter <elter@kde.org>
 *   Copyright (C) 2008 Laurent Montel <montel@kde.org>
 *
 *   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.
 *
 *   This program 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 General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program; if not, write to the Free Software
 *   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 *
 */

#include "basictab.h"

#include <QCheckBox>
#include <QLabel>
#include <QGroupBox>
#include <QVBoxLayout>
#include <QGridLayout>

#include <KLocale>
#include <KGlobal>
#include <KDialog>
#include <KLineEdit>
#include <KIconButton>
#include <KDesktopFile>
#include <KUrlRequester>
#include <KShell>
#include <KDebug>

#include "menuinfo.h"

#include "moc_basictab.cpp"

BasicTab::BasicTab( QWidget *parent )
    : KTabWidget(parent)
{
    _menuFolderInfo = 0;
    _menuEntryInfo = 0;

    // general group
    QWidget *general_group = new QWidget();
    QGridLayout *grid = new QGridLayout(general_group);
    grid->setMargin( KDialog::marginHint() );
    grid->setSpacing( KDialog::spacingHint() );

    general_group->setAcceptDrops(false);

    // setup line inputs
    _nameEdit = new KLineEdit(general_group);
    _nameEdit->setAcceptDrops(false);
    _descriptionEdit = new KLineEdit(general_group);
    _descriptionEdit->setAcceptDrops(false);
    _commentEdit = new KLineEdit(general_group);
    _commentEdit->setAcceptDrops(false);
    _execEdit = new KUrlRequester(general_group);
    _execEdit->lineEdit()->setAcceptDrops(false);
    _execEdit->setWhatsThis(i18n(
                                "Following the command, you can have several place holders which will be replaced "
                                "with the actual values when the actual program is run:\n"
                                "%f - a single file name\n"
                                "%F - a list of files; use for applications that can open several local files at once\n"
                                "%u - a single URL\n"
                                "%U - a list of URLs\n"
                                "%d - the folder of the file to open\n"
                                "%D - a list of folders\n"
                                "%i - the icon\n"
                                "%m - the mini-icon\n"
                                "%c - the caption"));

    _launchCB = new QCheckBox(i18n("Enable &launch feedback"), general_group);
    _onlyShowInKdeCB = new QCheckBox( i18n( "Only show in KDE" ), general_group );
    _hiddenEntryCB = new QCheckBox( i18n( "Hidden entry" ), general_group );
    _hiddenEntryCB->hide();

    // setup labels
    _nameLabel = new QLabel(i18n("&Name:"),general_group);
    _nameLabel->setBuddy(_nameEdit);
    _descriptionLabel = new QLabel(i18n("&Description:"),general_group);
    _descriptionLabel->setBuddy(_descriptionEdit);
    _commentLabel = new QLabel(i18n("&Comment:"),general_group);
    _commentLabel->setBuddy(_commentEdit);
    _execLabel = new QLabel(i18n("Co&mmand:"),general_group);
    _execLabel->setBuddy(_execEdit);
    grid->addWidget(_nameLabel, 0, 0);
    grid->addWidget(_descriptionLabel, 1, 0);
    grid->addWidget(_commentLabel, 2, 0);
    grid->addWidget(_execLabel, 3, 0);

    // connect line inputs
    connect(_nameEdit, SIGNAL(textChanged(QString)),
            SLOT(slotChanged()));
    connect(_descriptionEdit, SIGNAL(textChanged(QString)),
            SLOT(slotChanged()));
    connect(_commentEdit, SIGNAL(textChanged(QString)),
            SLOT(slotChanged()));
    connect(_execEdit, SIGNAL(textChanged(QString)),
            SLOT(slotChanged()));
    connect(_execEdit, SIGNAL(urlSelected(KUrl)),
            SLOT(slotExecSelected()));
    connect(_launchCB, SIGNAL(clicked()), SLOT(launchcb_clicked()));
    connect(_onlyShowInKdeCB, SIGNAL(clicked()), SLOT(onlyshowcb_clicked()) );
    connect( _hiddenEntryCB, SIGNAL(clicked()), SLOT(hiddenentrycb_clicked()) );
    // add line inputs to the grid
    grid->addWidget(_nameEdit, 0, 1, 1, 1);
    grid->addWidget(_descriptionEdit, 1, 1, 1, 1);
    grid->addWidget(_commentEdit, 2, 1, 1, 2);
    grid->addWidget(_execEdit, 3, 1, 1, 2);
    grid->addWidget(_launchCB, 4, 0, 1, 3 );
    grid->addWidget(_onlyShowInKdeCB, 5, 0, 1, 3 );
    grid->addWidget(_hiddenEntryCB, 6, 0, 1, 3 );

    // setup icon button
    _iconButton = new KIconButton(general_group);
    _iconButton->setFixedSize(56,56);
    _iconButton->setIconSize(32);
    connect(_iconButton, SIGNAL(iconChanged(QString)), SLOT(slotChanged()));
    grid->addWidget(_iconButton, 0, 2, 2, 1);
    grid->addItem(new QSpacerItem(0, 0, QSizePolicy::Minimum, QSizePolicy::MinimumExpanding), 8, 0, 1, 3);

    // add the general group to the main layout
    addTab(general_group, i18n("General"));

    QWidget *advanced = new QWidget();
    QVBoxLayout *advancedLayout = new QVBoxLayout(advanced);

    // path group
    _path_group = new QGroupBox(this);
    QHBoxLayout *hboxLayout1 = new QHBoxLayout(_path_group);
    hboxLayout1->setSpacing(KDialog::spacingHint());
    hboxLayout1->setMargin(KDialog::marginHint());

    _pathLabel = new QLabel(i18n("&Work path:"), _path_group);
    hboxLayout1->addWidget(_pathLabel);
    _pathEdit = new KUrlRequester(_path_group);
    hboxLayout1->addWidget(_pathEdit);
    _pathEdit->setMode(KFile::Directory | KFile::LocalOnly);
    _pathEdit->lineEdit()->setAcceptDrops(false);

    _pathLabel->setBuddy(_pathEdit);

    connect(_pathEdit, SIGNAL(textChanged(QString)),
            SLOT(slotChanged()));
    advancedLayout->addWidget(_path_group);

    // terminal group
    _term_group = new QGroupBox(this);
    QVBoxLayout *vbox = new QVBoxLayout(_term_group);
    vbox->setMargin(KDialog::marginHint());
    vbox->setSpacing(KDialog::spacingHint());

    _terminalCB = new QCheckBox(i18n("Run in term&inal"), _term_group);
    connect(_terminalCB, SIGNAL(clicked()), SLOT(termcb_clicked()));
    vbox->addWidget(_terminalCB);

    QWidget *hbox = new QWidget(_term_group);
    QHBoxLayout *hboxLayout2 = new QHBoxLayout(hbox);
    hbox->setLayout(hboxLayout2);
    hboxLayout2->setSpacing(KDialog::spacingHint());
    _termOptLabel = new QLabel(i18n("Terminal &options:"), hbox);
    hboxLayout2->addWidget(_termOptLabel);
    _termOptEdit = new KLineEdit(hbox);
    hboxLayout2->addWidget(_termOptEdit);
    _termOptEdit->setAcceptDrops(false);
    _termOptLabel->setBuddy(_termOptEdit);

    connect(_termOptEdit, SIGNAL(textChanged(QString)),
            SLOT(slotChanged()));
    vbox->addWidget(hbox);
    advancedLayout->addWidget(_term_group);

    _termOptEdit->setEnabled(false);

    // uid group
    _uid_group = new QGroupBox(this);
    vbox = new QVBoxLayout(_uid_group);
    vbox->setMargin(KDialog::marginHint());
    vbox->setSpacing(KDialog::spacingHint());

    _uidCB = new QCheckBox(i18n("&Run as a different user"), _uid_group);
    connect(_uidCB, SIGNAL(clicked()), SLOT(uidcb_clicked()));
    vbox->addWidget(_uidCB);

    hbox = new QWidget(_uid_group);
    QHBoxLayout *hboxLayout3 = new QHBoxLayout(hbox);
    hbox->setLayout(hboxLayout3);
    hboxLayout3->setSpacing(KDialog::spacingHint());
    _uidLabel = new QLabel(i18n("&Username:"), hbox);
    hboxLayout3->addWidget(_uidLabel);
    _uidEdit = new KLineEdit(hbox);
    hboxLayout3->addWidget(_uidEdit);
    _uidEdit->setAcceptDrops(false);
    _uidLabel->setBuddy(_uidEdit);

    connect(_uidEdit, SIGNAL(textChanged(QString)),
            SLOT(slotChanged()));
    vbox->addWidget(hbox);
    advancedLayout->addWidget(_uid_group);

    _uidEdit->setEnabled(false);

    advancedLayout->addItem(new QSpacerItem(0, 0, QSizePolicy::Minimum, QSizePolicy::MinimumExpanding));

    addTab(advanced, i18n("Advanced"));
    slotDisableAction();
}

void BasicTab::slotDisableAction()
{
    //disable all group at the beginning.
    //because there is not file selected.
    _nameEdit->setEnabled(false);
    _descriptionEdit->setEnabled(false);
    _commentEdit->setEnabled(false);
    _execEdit->setEnabled(false);
    _launchCB->setEnabled(false);
    _onlyShowInKdeCB->setEnabled( false );
    _hiddenEntryCB->setEnabled( false );
    _nameLabel->setEnabled(false);
    _descriptionLabel->setEnabled(false);
    _commentLabel->setEnabled(false);
    _execLabel->setEnabled(false);
    _path_group->setEnabled(false);
    _term_group->setEnabled(false);
    _uid_group->setEnabled(false);
    _iconButton->setEnabled(false);
}

void BasicTab::enableWidgets(bool isDF, bool isDeleted)
{
    // set only basic attributes if it is not a .desktop file
    _nameEdit->setEnabled(!isDeleted);
    _descriptionEdit->setEnabled(!isDeleted);
    _commentEdit->setEnabled(!isDeleted);
    _iconButton->setEnabled(!isDeleted);
    _execEdit->setEnabled(isDF && !isDeleted);
    _launchCB->setEnabled(isDF && !isDeleted);
    _onlyShowInKdeCB->setEnabled(isDF && !isDeleted);
    _hiddenEntryCB->setEnabled(isDF && !isDeleted);
    _nameLabel->setEnabled(!isDeleted);
    _descriptionLabel->setEnabled(!isDeleted);
    _commentLabel->setEnabled(!isDeleted);
    _execLabel->setEnabled(isDF && !isDeleted);

    _path_group->setEnabled(isDF && !isDeleted);
    _term_group->setEnabled(isDF && !isDeleted);
    _uid_group->setEnabled(isDF && !isDeleted);

    _termOptEdit->setEnabled(isDF && !isDeleted && _terminalCB->isChecked());
    _termOptLabel->setEnabled(isDF && !isDeleted && _terminalCB->isChecked());

    _uidEdit->setEnabled(isDF && !isDeleted && _uidCB->isChecked());
    _uidLabel->setEnabled(isDF && !isDeleted && _uidCB->isChecked());
}

void BasicTab::setFolderInfo(MenuFolderInfo *folderInfo)
{
    blockSignals(true);
    _menuFolderInfo = folderInfo;
    _menuEntryInfo = 0;

    _nameEdit->setText(folderInfo->caption);
    _descriptionEdit->setText(folderInfo->genericname);
    _descriptionEdit->setCursorPosition(0);
    _commentEdit->setText(folderInfo->comment);
    _commentEdit->setCursorPosition(0);
    _iconButton->setIcon(folderInfo->icon);

    // clean all disabled fields and return
    _execEdit->lineEdit()->clear();
    _pathEdit->lineEdit()->clear();
    _termOptEdit->clear();
    _uidEdit->clear();
    _launchCB->setChecked(false);
    _terminalCB->setChecked(false);
    _onlyShowInKdeCB->setChecked( false );
    _hiddenEntryCB->setChecked( false );
    _uidCB->setChecked(false);

    enableWidgets(false, folderInfo->hidden);
    blockSignals(false);
}

void BasicTab::setEntryInfo(MenuEntryInfo *entryInfo)
{
    blockSignals(true);
    _menuFolderInfo = 0;
    _menuEntryInfo = entryInfo;

    if (!entryInfo)
    {
       _nameEdit->clear();
       _descriptionEdit->clear();
       _commentEdit->clear();
       _iconButton->setIcon( QString() );

       _execEdit->lineEdit()->clear();
       _onlyShowInKdeCB->setChecked( false );
       _hiddenEntryCB->setChecked( false );

       _pathEdit->lineEdit()->clear();
       _termOptEdit->clear();
       _uidEdit->clear();

       _launchCB->setChecked(false);
       _terminalCB->setChecked(false);
       _uidCB->setChecked(false);
       enableWidgets(true, true);
       blockSignals(false);
       return;
    }

    KDesktopFile *df = entryInfo->desktopFile();

    _nameEdit->setText(df->readName());
    _descriptionEdit->setText(df->readGenericName());
    _descriptionEdit->setCursorPosition(0);
    _commentEdit->setText(df->readComment());
    _commentEdit->setCursorPosition(0);
    _iconButton->setIcon(df->readIcon());

    _execEdit->lineEdit()->setText(df->desktopGroup().readEntry("Exec"));

    _pathEdit->lineEdit()->setText(df->readPath());
    _termOptEdit->setText(df->desktopGroup().readEntry("TerminalOptions"));
    _uidEdit->setText(df->desktopGroup().readEntry("X-KDE-Username"));

    _launchCB->setChecked(df->desktopGroup().readEntry("StartupNotify", false));

    // or maybe enable only if it contains nothing but KDE?
    _onlyShowInKdeCB->setChecked( df->desktopGroup().readXdgListEntry("OnlyShowIn").contains("KDE"));

    if ( df->desktopGroup().hasKey("NoDisplay"))
        _hiddenEntryCB->setChecked(df->desktopGroup().readEntry("NoDisplay", true));
    else
        _hiddenEntryCB->setChecked(false);

    if(df->desktopGroup().readEntry("Terminal", 0) == 1)
        _terminalCB->setChecked(true);
    else
        _terminalCB->setChecked(false);

    _uidCB->setChecked(df->desktopGroup().readEntry("X-KDE-SubstituteUID", false));

    enableWidgets(true, entryInfo->hidden);
    blockSignals(false);
}

void BasicTab::apply()
{
    if (_menuEntryInfo)
    {
        _menuEntryInfo->setDirty();
        _menuEntryInfo->setCaption(_nameEdit->text());
        _menuEntryInfo->setDescription(_descriptionEdit->text());
        _menuEntryInfo->setIcon(_iconButton->icon());

        KDesktopFile *df = _menuEntryInfo->desktopFile();
        KConfigGroup dg = df->desktopGroup();
        dg.writeEntry("Comment", _commentEdit->text());
        dg.writeEntry("Exec", _execEdit->lineEdit()->text());

        dg.writePathEntry("Path", _pathEdit->lineEdit()->text());

        if (_terminalCB->isChecked())
            dg.writeEntry("Terminal", 1);
        else
            dg.writeEntry("Terminal", 0);

        dg.writeEntry("TerminalOptions", _termOptEdit->text());
        dg.writeEntry("X-KDE-SubstituteUID", _uidCB->isChecked());
        dg.writeEntry("X-KDE-Username", _uidEdit->text());
        dg.writeEntry("StartupNotify", _launchCB->isChecked());
        dg.writeEntry( "NoDisplay", _hiddenEntryCB->isChecked() );

        QStringList onlyShowIn = df->desktopGroup().readXdgListEntry("OnlyShowIn");
        /* the exact semantics of this checkbox are unclear if there is more than just KDE in the list...
         * For example: - The list is "Gnome;", the user enables "Only show in KDE" - should we remove Gnome?
         *              - The list is "Gnome;KDE;", the user unchecks the box - should we keep Gnome?
         */
        if ( _onlyShowInKdeCB->isChecked() && !onlyShowIn.contains("KDE"))
            onlyShowIn << "KDE";
        else if ( !_onlyShowInKdeCB->isChecked() && onlyShowIn.contains("KDE"))
            onlyShowIn.removeAll("KDE");
        if (onlyShowIn.isEmpty())
            dg.deleteEntry("OnlyShowIn");
        else
            dg.writeXdgListEntry("OnlyShowIn", onlyShowIn);
    }
    else
    {
        _menuFolderInfo->setCaption(_nameEdit->text());
        _menuFolderInfo->setGenericName(_descriptionEdit->text());
        _menuFolderInfo->setComment(_commentEdit->text());
        _menuFolderInfo->setIcon(_iconButton->icon());
    }
}

void BasicTab::slotChanged()
{
    if (signalsBlocked())
       return;
    apply();
    if (_menuEntryInfo)
       emit changed( _menuEntryInfo );
    else
       emit changed( _menuFolderInfo );
}

void BasicTab::launchcb_clicked()
{
    slotChanged();
}

void BasicTab::onlyshowcb_clicked()
{
    slotChanged();
}

void BasicTab::hiddenentrycb_clicked()
{
    slotChanged();
}

void BasicTab::termcb_clicked()
{
    _termOptEdit->setEnabled(_terminalCB->isChecked());
    _termOptLabel->setEnabled(_terminalCB->isChecked());
    slotChanged();
}

void BasicTab::uidcb_clicked()
{
    _uidEdit->setEnabled(_uidCB->isChecked());
    _uidLabel->setEnabled(_uidCB->isChecked());
    slotChanged();
}

void BasicTab::slotExecSelected()
{
    QString path = _execEdit->lineEdit()->text();
    if (!path.startsWith('\''))
        _execEdit->lineEdit()->setText(KShell::quoteArg(path));
}

void BasicTab::updateHiddenEntry( bool show )
{
    if ( show )
        _hiddenEntryCB->show();
    else
        _hiddenEntryCB->hide();
}