/* This file is part of the KDE project
   Copyright (C) 2003 Jaroslaw Staniek <js@iidea.pl>

   This program is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library 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
   Library General Public License for more details.

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

#include "KexiProjectSelector.h"

#include <kexidb/drivermanager.h>
#include <kexidb/connectiondata.h>
#include "core/kexi.h"

#include <kapplication.h>
#include <kiconloader.h>
#include <kmimetype.h>
#include <klocale.h>
#include <kdebug.h>

#include <tqlabel.h>
#include <tqpushbutton.h>
#include <tqlayout.h>
#include <tqlistview.h>

#include <assert.h>

//! @internal
class KexiProjectSelectorWidgetPrivate
{
public:
	KexiProjectSelectorWidgetPrivate()
	{
		selectable = true;
	}
	TQPixmap fileicon, dbicon;
	bool showProjectNameColumn : 1;
	bool showConnectionColumns : 1;
	bool selectable : 1;
};

/*================================================================*/

//! helper class
class ProjectDataLVItem : public TQListViewItem
{
public:
	ProjectDataLVItem(KexiProjectData *d, 
		const KexiDB::Driver::Info& info, KexiProjectSelectorWidget *selector )
		: TQListViewItem(selector->list)
		, data(d)
	{
		int colnum = 0;
		const KexiDB::ConnectionData *cdata = data->constConnectionData();
		if (selector->d->showProjectNameColumn)
			setText(colnum++, data->caption()+"  ");
		
		setText(colnum++, data->databaseName()+"  ");
		
		if (selector->d->showConnectionColumns) {
			TQString drvname = info.caption.isEmpty() ? cdata->driverName : info.caption;
			if (info.fileBased) {
				setText(colnum++, i18n("File") + " ("+drvname+")  " );
			} else {
				setText(colnum++, drvname+"  " );
			}
		
			TQString conn;
			if (!cdata->caption.isEmpty())
				conn = cdata->caption + ": ";
			conn += cdata->serverInfoString();
			setText(3, conn + "  ");
		}
	}
	~ProjectDataLVItem() {}
	
	KexiProjectData *data;
};

/*================================================================*/

/*!
 *  Constructs a KexiProjectSelector which is a child of 'tqparent', with the 
 *  name 'name' and widget flags set to 'f' 
 */
KexiProjectSelectorWidget::KexiProjectSelectorWidget( 
	TQWidget* tqparent, const char* name, 
	KexiProjectSet* prj_set, bool showProjectNameColumn,
	bool showConnectionColumns )
    : KexiProjectSelectorBase( tqparent, name )
	,m_prj_set(prj_set)
	,d(new KexiProjectSelectorWidgetPrivate())
{
	d->showProjectNameColumn = showProjectNameColumn;
	d->showConnectionColumns = showConnectionColumns;
	TQString none, iconname = KMimeType::mimeType( KexiDB::Driver::defaultFileBasedDriverMimeType() )->icon(none,0);
	d->fileicon = KGlobal::iconLoader()->loadIcon( iconname, KIcon::Desktop );
	setIcon( d->fileicon );
	d->dbicon = SmallIcon("database");
//	list->setHScrollBarMode( TQScrollView::AlwaysOn );

	if (!d->showConnectionColumns) {
		list->removeColumn(2);
		list->removeColumn(2);
	}
	if (!d->showProjectNameColumn) {
		list->removeColumn(0);
	}
	setFocusProxy(list);

	//show projects
	setProjectSet( m_prj_set );
	connect(list,TQT_SIGNAL(doubleClicked(TQListViewItem*)),this,TQT_SLOT(slotItemExecuted(TQListViewItem*)));
	connect(list,TQT_SIGNAL(returnPressed(TQListViewItem*)),this,TQT_SLOT(slotItemExecuted(TQListViewItem*)));
	connect(list,TQT_SIGNAL(selectionChanged()),this,TQT_SLOT(slotItemSelected()));
}

/*!  
 *  Destroys the object and frees any allocated resources
 */
KexiProjectSelectorWidget::~KexiProjectSelectorWidget()
{
	delete d;
}

KexiProjectData* KexiProjectSelectorWidget::selectedProjectData() const
{
	ProjectDataLVItem *item = static_cast<ProjectDataLVItem*>(list->selectedItem());
	if (item)
		return item->data;
	return 0;
}

void KexiProjectSelectorWidget::slotItemExecuted(TQListViewItem *item)
{
	if (!d->selectable)
		return;
	ProjectDataLVItem *ditem = static_cast<ProjectDataLVItem*>(item);
	if (ditem)
		emit projectExecuted( ditem->data );
}

void KexiProjectSelectorWidget::slotItemSelected()
{
	if (!d->selectable)
		return;
	ProjectDataLVItem *ditem = static_cast<ProjectDataLVItem*>(list->selectedItem());
	emit selectionChanged( ditem ? ditem->data : 0 );
}

void KexiProjectSelectorWidget::setProjectSet( KexiProjectSet* prj_set )
{
	if (prj_set) {
		//old list
		list->clear();
	}
	m_prj_set = prj_set; 
	if (!m_prj_set)
		return;
//TODO: what with project set's ownership?
	if (m_prj_set->error()) {
		kdDebug() << "KexiProjectSelectorWidget::setProjectSet() : m_prj_set->error() !"<<endl;
		return;
	}
	KexiDB::DriverManager manager;
	KexiProjectData::List prjlist = m_prj_set->list();
	KexiProjectData *data = prjlist.first();
	while (data) {
		KexiDB::Driver::Info info = manager.driverInfo(data->constConnectionData()->driverName);
		if (!info.name.isEmpty()) {
			ProjectDataLVItem *item = new ProjectDataLVItem(data, info, this);
			if (!d->selectable)
				item->setSelectable(false);
			if (info.fileBased)
				item->setPixmap( 0, d->fileicon );
			else
				item->setPixmap( 0, d->dbicon );
		}
		else {
			kdWarning() << "KexiProjectSelector::KexiProjectSelector(): no driver found for '" 
				<< data->constConnectionData()->driverName << "'!" << endl;
		}
		data=prjlist.next();
	}
	if (list->firstChild()) {
		list->setSelected(list->firstChild(),true);
	}
}

void KexiProjectSelectorWidget::setSelectable(bool set)
{
	if (d->selectable == set)
		return;
	d->selectable = set;
	//update items' state
	TQListViewItemIterator it( list );
	while ( it.current() ) {
		it.current()->setSelectable( d->selectable );
	}
}
	
bool KexiProjectSelectorWidget::isSelectable() const
{
	return d->selectable;
}

/*================================================================*/

KexiProjectSelectorDialog::KexiProjectSelectorDialog( TQWidget *tqparent, const char *name,
	KexiProjectSet* prj_set, bool showProjectNameColumn, bool showConnectionColumns)
	: KDialogBase( Plain, i18n("Open Recent Project"), 
#ifndef KEXI_NO_UNFINISHED 
	//! @todo re-add Help when doc is available
	Help | 
#endif
	Ok | Cancel, Ok, tqparent, name )
{
	init(prj_set, showProjectNameColumn, showConnectionColumns);
}

KexiProjectSelectorDialog::KexiProjectSelectorDialog( TQWidget *tqparent, const char *name,
	KexiDB::ConnectionData* cdata, 
	bool showProjectNameColumn, bool showConnectionColumns)
	: KDialogBase( 
		Plain, i18n("Open Project"), 
#ifndef KEXI_NO_UNFINISHED 
	//! @todo re-add Help when doc is available
	Help | 
#endif
	Ok | Cancel, Ok, tqparent, name, true/*modal*/, false/*sep*/ )
{
	setButtonGuiItem(Ok, KGuiItem(i18n("&Open"), "fileopen", i18n("Open Database Connection")));
	assert(cdata);
	if (!cdata)
		return;
	KexiProjectSet *prj_set = new KexiProjectSet( *cdata );
	init(prj_set, showProjectNameColumn, showConnectionColumns);
	
	m_sel->label->setText( i18n("Select a project on <b>%1</b> database server to open:")
		.tqarg(cdata->serverInfoString(false)) );
}

KexiProjectSelectorDialog::~KexiProjectSelectorDialog()
{
}

void KexiProjectSelectorDialog::init(KexiProjectSet* prj_set, bool showProjectNameColumn, 
	bool showConnectionColumns)
{
	setSizeGripEnabled(true);
	
	TQVBoxLayout *lyr = new TQVBoxLayout(plainPage(), 0, KDialogBase::spacingHint(), "lyr");
	m_sel = new KexiProjectSelectorWidget(plainPage(), "sel", 
		prj_set, showProjectNameColumn, showConnectionColumns);
	lyr->addWidget(m_sel);
	setIcon(*m_sel->icon());
	m_sel->setFocus();
	
	connect(m_sel,TQT_SIGNAL(projectExecuted(KexiProjectData*)),
		this,TQT_SLOT(slotProjectExecuted(KexiProjectData*)));
	connect(m_sel,TQT_SIGNAL(selectionChanged(KexiProjectData*)),
		this,TQT_SLOT(slotProjectSelectionChanged(KexiProjectData*)));
}

KexiProjectData* KexiProjectSelectorDialog::selectedProjectData() const
{
	return m_sel->selectedProjectData();
}

void KexiProjectSelectorDialog::slotProjectExecuted(KexiProjectData*)
{
	accept();
}

void KexiProjectSelectorDialog::slotProjectSelectionChanged(KexiProjectData* pdata)
{
	enableButtonOK(pdata);
}

void KexiProjectSelectorDialog::show()
{
	KDialogBase::show();
	KDialog::centerOnScreen(this);
}

#include "KexiProjectSelector.moc"