/* $Id$ */

/*
 * This file is part of OpenTTD.
 * OpenTTD 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, version 2.
 * OpenTTD 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 OpenTTD. If not, see <http://www.gnu.org/licenses/>.
 */

/** @file newgrf_object.cpp Handling of object NewGRFs. */

#include "stdafx.h"
#include "core/mem_func.hpp"
#include "date_func.h"
#include "newgrf.h"
#include "newgrf_class_func.h"
#include "newgrf_object.h"
#include "object_map.h"
#include "openttd.h"

/** The override manager for our objects. */
ObjectOverrideManager _object_mngr(NEW_OBJECT_OFFSET, NUM_OBJECTS, INVALID_OBJECT_TYPE);

extern const ObjectSpec _original_objects[NEW_OBJECT_OFFSET];
/** All the object specifications. */
ObjectSpec _object_specs[NUM_OBJECTS];

/* static */ const ObjectSpec *ObjectSpec::Get(ObjectType index)
{
	assert(index < NUM_OBJECTS);
	return &_object_specs[index];
}

/* static */ const ObjectSpec *ObjectSpec::GetByTile(TileIndex tile)
{
	return ObjectSpec::Get(GetObjectType(tile));
}

bool ObjectSpec::IsAvailable() const
{
	return
			this->enabled &&
			_date > this->introduction_date &&
			(_date < this->end_of_life_date || this->end_of_life_date < this->introduction_date + 365) &&
			HasBit(this->climate, _settings_game.game_creation.landscape) &&
			(flags & (_game_mode != GM_EDITOR ? OBJECT_FLAG_ONLY_IN_SCENEDIT : OBJECT_FLAG_ONLY_IN_GAME)) == 0;
}

uint ObjectSpec::Index() const
{
	return this - _object_specs;
}

/** This function initialize the spec arrays of objects. */
void ResetObjects()
{
	/* Clean the pool. */
	MemSetT(_object_specs, 0, lengthof(_object_specs));

	/* And add our originals. */
	MemCpyT(_object_specs, _original_objects, lengthof(_original_objects));
}

template <typename Tspec, typename Tid, Tid Tmax>
/* static */ void NewGRFClass<Tspec, Tid, Tmax>::InsertDefaults()
{
	/* We only add the transmitters in the scenario editor. */
	if (_game_mode != GM_EDITOR) return;

	ObjectClassID cls = ObjectClass::Allocate('LTHS');
	ObjectClass::SetName(cls, STR_OBJECT_CLASS_LTHS);
	_object_specs[OBJECT_LIGHTHOUSE].cls_id = cls;
	ObjectClass::Assign(&_object_specs[OBJECT_LIGHTHOUSE]);

	cls = ObjectClass::Allocate('TRNS');
	ObjectClass::SetName(cls, STR_OBJECT_CLASS_TRNS);
	_object_specs[OBJECT_TRANSMITTER].cls_id = cls;
	ObjectClass::Assign(&_object_specs[OBJECT_TRANSMITTER]);
}

INSTANTIATE_NEWGRF_CLASS_METHODS(ObjectClass, ObjectSpec, ObjectClassID, OBJECT_CLASS_MAX)