/**
 * \file qt4/FileDialog.cpp
 * This file is part of LyX, the document processor.
 * Licence details can be found in the file COPYING.
 *
 * \author John Levon
 * \author Jean-Marc Lasgouttes
 *
 * Full author contact details are available in file CREDITS.
 */

#include <config.h>

#include "FileDialog.h"

#include "LyXFileDialog.h"
#include "qt_helpers.h"

#include "support/debug.h"
#include "support/FileName.h"
#include "support/filetools.h"
#include "support/gettext.h"
#include "support/os.h"

#include <string>

/** when this is defined, the code will use
 * QFileDialog::getOpenFileName and friends to create filedialogs.
 * Effects:
 * - the dialog does not use the quick directory buttons (Button
 *   parameters);
 * - with Qt/Mac or Qt/Win, the dialogs native to the environment are used.
 * - with Qt/Win and Qt <= 4.3.0, there was a number of bugs with our own
 *   file dialog (http://www.lyx.org/trac/ticket/3907).
 *
 * Therefore there is a tradeoff in enabling or disabling this (JMarc)
 */
#if defined(Q_OS_MAC) || defined(Q_OS_WIN)
#define USE_NATIVE_FILEDIALOG 1
#endif

#ifdef USE_NATIVE_FILEDIALOG
#include <QApplication>
#endif

namespace lyx {

using namespace support;


class FileDialog::Private {
public:
	Button b1;
	Button b2;
};


FileDialog::FileDialog(QString const & t)
	: private_(new FileDialog::Private), title_(t)
{}


FileDialog::~FileDialog()
{
	delete private_;
}


void FileDialog::setButton1(QString const & label, QString const & dir)
{
	private_->b1.first = label;
	private_->b1.second = dir;
}


void FileDialog::setButton2(QString const & label, QString const & dir)
{
	private_->b2.first = label;
	private_->b2.second = dir;
}


FileDialog::Result FileDialog::save(QString const & path,
	QStringList const & filters, QString const & suggested,
	QString * selectedFilter)
{
	LYXERR(Debug::GUI, "Select with path \"" << path
			   << "\", mask \"" << filters.join(";;")
			   << "\", suggested \"" << suggested << '"');

	FileDialog::Result result;
	result.first = FileDialog::Chosen;

#ifdef USE_NATIVE_FILEDIALOG
	QString const startsWith = makeAbsPath(suggested, path);
	QString const name = 
		QFileDialog::getSaveFileName(qApp->focusWidget(),
		title_, startsWith, filters.join(";;"),
		selectedFilter, QFileDialog::DontConfirmOverwrite);
	if (name.isNull())
		result.first = FileDialog::Later;
	else
		result.second = toqstr(os::internal_path(fromqstr(name)));
#else
	LyXFileDialog dlg(title_, path, filters, private_->b1, private_->b2);
	dlg.setFileMode(QFileDialog::AnyFile);
	dlg.setAcceptMode(QFileDialog::AcceptSave);
	dlg.setConfirmOverwrite(false);
	if (selectedFilter != 0 && !selectedFilter->isEmpty())
		dlg.selectNameFilter(*selectedFilter);

	if (!suggested.isEmpty())
		dlg.selectFile(suggested);

	LYXERR(Debug::GUI, "Synchronous FileDialog: ");
	int res = dlg.exec();
	LYXERR(Debug::GUI, "result " << res);
	if (res == QDialog::Accepted)
		result.second = internalPath(dlg.selectedFiles()[0]);
	else
		result.first = FileDialog::Later;
	if (selectedFilter != 0)
		*selectedFilter = dlg.selectedNameFilter();
	dlg.hide();
#endif
	return result;
}


FileDialog::Result FileDialog::save(QString const & path,
	QStringList const & filters, QString const & suggested)
{
	return save(path, filters, suggested, 0);
}


FileDialog::Result FileDialog::open(QString const & path,
	QStringList const & filters, QString const & suggested)
{
	LYXERR(Debug::GUI, "Select with path \"" << path
			   << "\", mask \"" << filters.join(";;")
			   << "\", suggested \"" << suggested << '"');
	FileDialog::Result result;
	result.first = FileDialog::Chosen;

#ifdef USE_NATIVE_FILEDIALOG
	QString const startsWith = makeAbsPath(suggested, path);
	QString const file = QFileDialog::getOpenFileName(qApp->focusWidget(),
		title_, startsWith, filters.join(";;"));
	if (file.isNull())
		result.first = FileDialog::Later;
	else
		result.second = internalPath(file);
#else
	LyXFileDialog dlg(title_, path, filters, private_->b1, private_->b2);

	if (!suggested.isEmpty())
		dlg.selectFile(suggested);

	LYXERR(Debug::GUI, "Synchronous FileDialog: ");
	int res = dlg.exec();
	LYXERR(Debug::GUI, "result " << res);
	if (res == QDialog::Accepted)
		result.second = internalPath(dlg.selectedFiles()[0]);
	else
		result.first = FileDialog::Later;
	dlg.hide();
#endif
	return result;
}


FileDialog::Result FileDialog::opendir(QString const & path,
	QString const & suggested)
{
	LYXERR(Debug::GUI, "Select with path \"" << path
			   << "\", suggested \"" << suggested << '"');
	FileDialog::Result result;
	result.first = FileDialog::Chosen;

#ifdef USE_NATIVE_FILEDIALOG
	QString const startsWith = toqstr(makeAbsPath(fromqstr(suggested),
		fromqstr(path)).absFileName());
	QString const dir = QFileDialog::getExistingDirectory(qApp->focusWidget(),
		title_, startsWith);
	if (dir.isNull())
		result.first = FileDialog::Later;
	else
		result.second = toqstr(os::internal_path(fromqstr(dir)));
#else
	LyXFileDialog dlg(title_, path, QStringList(qt_("Directories")),
		private_->b1, private_->b2);

	dlg.setFileMode(QFileDialog::DirectoryOnly);

	if (!suggested.isEmpty())
		dlg.selectFile(suggested);

	LYXERR(Debug::GUI, "Synchronous FileDialog: ");
	int res = dlg.exec();
	LYXERR(Debug::GUI, "result " << res);
	if (res == QDialog::Accepted)
		result.second = internalPath(dlg.selectedFiles()[0]);
	else
		result.first = FileDialog::Later;
	dlg.hide();
#endif
	return result;
}


} // namespace lyx