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/* $Id$ */

/*
 * 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 station_type.h Types related to stations. */

#ifndef STATION_TYPE_H
#define STATION_TYPE_H

#include "core/smallstack_type.hpp"
#include "tilearea_type.h"
#include <set>

typedef uint16 StationID;
typedef uint16 RoadStopID;

struct BaseStation;
struct Station;
struct RoadStop;
struct StationSpec;
struct Waypoint;

static const StationID NEW_STATION = 0xFFFE;
static const StationID INVALID_STATION = 0xFFFF;

typedef SmallStack<StationID, StationID, INVALID_STATION, 8, 0xFFFD> StationIDStack;

/** Station types */
enum StationType {
	STATION_RAIL,
	STATION_AIRPORT,
	STATION_TRUCK,
	STATION_BUS,
	STATION_OILRIG,
	STATION_DOCK,
	STATION_BUOY,
	STATION_WAYPOINT,
};

/** Types of RoadStops */
enum RoadStopType {
	ROADSTOP_BUS,    ///< A standard stop for buses
	ROADSTOP_TRUCK,  ///< A standard stop for trucks
};

/** The facilities a station might be having */
enum StationFacility : byte {
	FACIL_NONE       = 0,      ///< The station has no facilities at all
	FACIL_TRAIN      = 1 << 0, ///< Station with train station
	FACIL_TRUCK_STOP = 1 << 1, ///< Station with truck stops
	FACIL_BUS_STOP   = 1 << 2, ///< Station with bus stops
	FACIL_AIRPORT    = 1 << 3, ///< Station with an airport
	FACIL_DOCK       = 1 << 4, ///< Station with a dock
	FACIL_WAYPOINT   = 1 << 7, ///< Station is a waypoint
};
DECLARE_ENUM_AS_BIT_SET(StationFacility)

/** The vehicles that may have visited a station */
enum StationHadVehicleOfType : byte {
	HVOT_NONE     = 0,      ///< Station has seen no vehicles
	HVOT_TRAIN    = 1 << 1, ///< Station has seen a train
	HVOT_BUS      = 1 << 2, ///< Station has seen a bus
	HVOT_TRUCK    = 1 << 3, ///< Station has seen a truck
	HVOT_AIRCRAFT = 1 << 4, ///< Station has seen an aircraft
	HVOT_SHIP     = 1 << 5, ///< Station has seen a ship

	HVOT_WAYPOINT = 1 << 6, ///< Station is a waypoint (NewGRF only!)
};
DECLARE_ENUM_AS_BIT_SET(StationHadVehicleOfType)

/** The different catchment areas used */
enum CatchmentArea {
	CA_NONE            =  0, ///< Catchment when the station has no facilities
	CA_BUS             =  3, ///< Catchment for bus stops with "modified catchment" enabled
	CA_TRUCK           =  3, ///< Catchment for truck stops with "modified catchment" enabled
	CA_TRAIN           =  4, ///< Catchment for train stations with "modified catchment" enabled
	CA_DOCK            =  5, ///< Catchment for docks with "modified catchment" enabled

	CA_UNMODIFIED      =  4, ///< Catchment for all stations with "modified catchment" disabled

	MAX_CATCHMENT      = 10, ///< Maximum catchment for airports with "modified catchment" enabled
};

static const uint MAX_LENGTH_STATION_NAME_CHARS = 32; ///< The maximum length of a station name in characters including '\0'

struct StationCompare {
	bool operator() (const Station *lhs, const Station *rhs) const;
};

/** List of stations */
typedef std::set<Station *, StationCompare> StationList;

/**
 * Structure contains cached list of stations nearby. The list
 * is created upon first call to GetStations()
 */
class StationFinder : TileArea {
	StationList stations; ///< List of stations nearby
public:
	/**
	 * Constructs StationFinder
	 * @param area the area to search from
	 */
	StationFinder(const TileArea &area) : TileArea(area) {}
	const StationList *GetStations();
};

#endif /* STATION_TYPE_H */