/* This file is part of the KDE project
   Copyright (C) 2013 Boudewijn Rempt <boud@valdyas.org>

   This program is free software; you can redistribute it and/or
   modify it under the terms of the Lesser 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 code is based on Thacher Ulrich PSD loading code released
   on public domain. See: http://tulrich.com/geekstuff/
*/

#include "ora.h"

#include <QImage>
#include <QScopedPointer>

#include <kzip.h>

#include <kis_image.h>
#include <KisDocument.h>
#include <kis_group_layer.h>
#include <kis_image.h>
#include <kis_open_raster_stack_load_visitor.h>
#include "ora_load_context.h"
#include <kis_paint_layer.h>

#include <kdebug.h>

OraHandler::OraHandler()
{
}

bool OraHandler::canRead() const
{
    if (canRead(device())) {
        setFormat("ora");
        return true;
    }
    return false;
}

bool OraHandler::read(QImage *image)
{
    KZip zip(device());
    if (!zip.open(QIODevice::ReadOnly)) return false;

    const KArchiveEntry *entry = zip.directory()->entry("mergedimage.png");
    if (!entry || !entry->isFile()) return false;

    const KZipFileEntry* fileZipEntry = static_cast<const KZipFileEntry*>(entry);

    image->loadFromData(fileZipEntry->data(), "PNG");

    return true;
}

bool OraHandler::write(const QImage &)
{
    // TODO Stub!
    return false;
}

QByteArray OraHandler::name() const
{
    return "ora";
}

bool OraHandler::canRead(QIODevice *device)
{
    if (!device) {
        qWarning("KraHandler::canRead() called with no device");
        return false;
    }

    KZip zip(device);
    if (!zip.open(QIODevice::ReadOnly)) return false;

    const KArchiveEntry *entry = zip.directory()->entry("mimetype");
    if (!entry || !entry->isFile()) return false;

    const KZipFileEntry* fileZipEntry = static_cast<const KZipFileEntry*>(entry);

    return (qstrcmp(fileZipEntry->data().constData(), "image/openraster") == 0);
}


class OraPlugin : public QImageIOPlugin
{
public:
    QStringList keys() const;
    Capabilities capabilities(QIODevice *device, const QByteArray &format) const;
    QImageIOHandler *create(QIODevice *device, const QByteArray &format = QByteArray()) const;
};

QStringList OraPlugin::keys() const
{
    return QStringList() << "ora" << "ORA";
}

QImageIOPlugin::Capabilities OraPlugin::capabilities(QIODevice *device, const QByteArray &format) const
{
    Q_UNUSED(device);
    if (format == "ora" || format == "ORA")
        return Capabilities(CanRead);
    else
        return 0;

}

QImageIOHandler *OraPlugin::create(QIODevice *device, const QByteArray &format) const
{
    QImageIOHandler *handler = new OraHandler;
    handler->setDevice(device);
    handler->setFormat(format);
    return handler;
}

Q_EXPORT_STATIC_PLUGIN(OraPlugin)
Q_EXPORT_PLUGIN2(Ora, OraPlugin)
