/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * 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 "ac/dynobj/scriptcamera.h"
#include "ac/gamestate.h"
#include "util/bbop.h"

using namespace AGS::Common;

ScriptCamera::ScriptCamera(int id) : _id(id) {}

const char *ScriptCamera::GetType()
{
    return "Camera2";
}

int ScriptCamera::Dispose(const char *address, bool force)
{
    // Note that ScriptCamera is a reference to actual Camera object,
    // and this deletes the reference, while camera may remain in GameState.
    delete this;
    return 1;
}

int ScriptCamera::Serialize(const char *address, char *buffer, int bufsize)
{
    StartSerialize(buffer);
    SerializeInt(_id);
    return EndSerialize();
}

void ScriptCamera::Unserialize(int index, const char *serializedData, int dataSize)
{
    StartUnserialize(serializedData, dataSize);
    _id = UnserializeInt();
    ccRegisterUnserializedObject(index, this, this);
}

ScriptCamera *Camera_Unserialize(int handle, const char *serializedData, int dataSize)
{
    // The way it works now, we must not create a new script object,
    // but acquire one from the GameState, which keeps the first reference.
    // This is essential because GameState should be able to invalidate any
    // script references when Camera gets removed.
    const int id = BBOp::Int32FromLE(*((int*)serializedData));
    if (id >= 0)
    {
        auto scam = play.RegisterRoomCamera(id, handle);
        if (scam)
            return scam;
    }
    return new ScriptCamera(-1); // make invalid reference
}