
/**************************************************************************
 *                                                                        *
 *  Regina - A Normal Surface Theory Calculator                           *
 *  Qt User Interface                                                     *
 *                                                                        *
 *  Copyright (c) 1999-2023, Ben Burton                                   *
 *  For further details contact Ben Burton (bab@debian.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.                       *
 *                                                                        *
 *  As an exception, when this program is distributed through (i) the     *
 *  App Store by Apple Inc.; (ii) the Mac App Store by Apple Inc.; or     *
 *  (iii) Google Play by Google Inc., then that store may impose any      *
 *  digital rights management, device limits and/or redistribution        *
 *  restrictions that are required by its terms of service.               *
 *                                                                        *
 *  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 St, Fifth Floor, Boston,       *
 *  MA 02110-1301, USA.                                                   *
 *                                                                        *
 **************************************************************************/

#include "snappea/snappeatriangulation.h"

#include "reginamain.h"
#include "reginasupport.h"
#include "snappeahandler.h"
#include "../packetfilter.h"

#include <QFile>
#include <QTextDocument>

const SnapPeaHandler SnapPeaHandler::instance;

std::shared_ptr<regina::Packet> SnapPeaHandler::importData(
        const QString& fileName, ReginaMain* parentWidget) const {
    try {
        return regina::make_packet<regina::SnapPeaTriangulation>(std::in_place,
            static_cast<const char*>(QFile::encodeName(fileName)));
    } catch (const regina::FileError&) {
        ReginaSupport::sorry(parentWidget,
            QObject::tr("The import failed."),
            QObject::tr("<qt>Please check that the file <tt>%1</tt> "
                "is readable and in SnapPea format.</qt>").
                arg(fileName.toHtmlEscaped()));
        return nullptr;
    }
}

PacketFilter* SnapPeaHandler::canExport() const {
    return new SubclassFilter<regina::Triangulation<3>>();
}

bool SnapPeaHandler::exportData(const regina::Packet& data,
        const QString& fileName, QWidget* parentWidget) const {
    // Cast all the way up to Triangulation<3>, so that we catch both
    // Triangulation<3> and SnapPeaTriangulation packets.
    auto& tri = regina::static_triangulation3_cast(data);
    if (! tri.isValid()) {
        ReginaSupport::sorry(parentWidget,
            QObject::tr("This triangulation is not valid."),
            QObject::tr("I can only export valid triangulations "
                "to SnapPea format."));
        return false;
    }
    if (tri.hasBoundaryTriangles()) {
        ReginaSupport::sorry(parentWidget,
            QObject::tr("This triangulation has boundary triangles."),
            QObject::tr("I can only export closed or ideal triangulations "
                "to SnapPea format."));
        return false;
    }
    if (! tri.saveSnapPea(
            static_cast<const char*>(QFile::encodeName(fileName)))) {
        ReginaSupport::warn(parentWidget,
            QObject::tr("The export failed."),
            QObject::tr("<qt>An unknown error occurred, probably related "
            "to file I/O.  Please check that you have permissions to write "
            "to the file <tt>%1</tt>.</qt>").arg(fileName.toHtmlEscaped()));
        return false;
    }
    return true;
}

