/* $Id$ */

/*
 * 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 waypoint_base.h Base of waypoints. */

#ifndef WAYPOINT_BASE_H
#define WAYPOINT_BASE_H

#include "base_station_base.h"

/** Representation of a waypoint. */
struct Waypoint : SpecializedStation<Waypoint, true> {
	uint16 town_cn;    ///< The N-1th waypoint for this town (consecutive number)

	/**
	 * Create a waypoint at the given tile.
	 * @param tile The location of the waypoint.
	 */
	Waypoint(TileIndex tile = INVALID_TILE) : SpecializedStation<Waypoint, true>(tile) { }
	~Waypoint();

	void UpdateVirtCoord();

	/* virtual */ FORCEINLINE bool TileBelongsToRailStation(TileIndex tile) const
	{
		return IsRailWaypointTile(tile) && GetStationIndex(tile) == this->index;
	}

	/* virtual */ uint32 GetNewGRFVariable(const struct ResolverObject *object, byte variable, byte parameter, bool *available) const;

	/* virtual */ void GetTileArea(TileArea *ta, StationType type) const;

	/* virtual */ uint GetPlatformLength(TileIndex tile, DiagDirection dir) const
	{
		return 1;
	}

	/* virtual */ uint GetPlatformLength(TileIndex tile) const
	{
		return 1;
	}

	/**
	 * Is this a single tile waypoint?
	 * @return true if it is.
	 */
	FORCEINLINE bool IsSingleTile() const
	{
		return (this->facilities & FACIL_TRAIN) != 0 && this->train_station.w == 1 && this->train_station.h == 1;
	}

	/**
	 * Is the "type" of waypoint the same as the given waypoint,
	 * i.e. are both a rail waypoint or are both a buoy?
	 * @param wp The waypoint to compare to.
	 * @return true iff their types are equal.
	 */
	FORCEINLINE bool IsOfType(const Waypoint *wp) const
	{
		return this->string_id == wp->string_id;
	}
};

/**
 * Iterate over all waypoints.
 * @param var The variable used for iteration.
 */
#define FOR_ALL_WAYPOINTS(var) FOR_ALL_BASE_STATIONS_OF_TYPE(Waypoint, var)

#endif /* WAYPOINT_BASE_H */