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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_base.h Base classes/functions for stations. */

#ifndef STATION_BASE_H
#define STATION_BASE_H

#include "base_station_base.h"
#include "airport.h"
#include "cargopacket.h"
#include "industry_type.h"

typedef Pool<BaseStation, StationID, 32, 64000> StationPool;
extern StationPool _station_pool;

static const byte INITIAL_STATION_RATING = 175;

struct GoodsEntry {
	enum AcceptancePickup {
		ACCEPTANCE,
		PICKUP
	};

	GoodsEntry() :
		acceptance_pickup(0),
		days_since_pickup(255),
		rating(INITIAL_STATION_RATING),
		last_speed(0),
		last_age(255)
	{}

	byte acceptance_pickup;
	byte days_since_pickup;
	byte rating;
	byte last_speed;
	byte last_age;
	StationCargoList cargo; ///< The cargo packets of cargo waiting in this station
};


typedef SmallVector<Industry *, 2> IndustryVector;

/** Station data structure */
struct Station : SpecializedStation<Station, false> {
public:
	RoadStop *GetPrimaryRoadStop(RoadStopType type) const
	{
		return type == ROADSTOP_BUS ? bus_stops : truck_stops;
	}

	RoadStop *GetPrimaryRoadStop(const struct RoadVehicle *v) const;

	const AirportFTAClass *Airport() const
	{
		if (airport.tile == INVALID_TILE) return GetAirport(AT_DUMMY);
		return GetAirport(airport_type);
	}

	const AirportSpec *GetAirportSpec() const
	{
		if (airport.tile == INVALID_TILE) return &AirportSpec::dummy;
		return AirportSpec::Get(this->airport_type);
	}

	RoadStop *bus_stops;    ///< All the road stops
	TileArea bus_station;   ///< Tile area the bus 'station' part covers
	RoadStop *truck_stops;  ///< All the truck stops
	TileArea truck_station; ///< Tile area the truck 'station' part covers

	TileArea airport;       ///< Tile area the airport covers
	TileIndex dock_tile;    ///< The location of the dock

	IndustryType indtype;   ///< Industry type to get the name from

	StationHadVehicleOfTypeByte had_vehicle_of_type;

	byte time_since_load;
	byte time_since_unload;
	byte airport_type;

	uint64 airport_flags;   ///< stores which blocks on the airport are taken. was 16 bit earlier on, then 32

	byte last_vehicle_type;
	std::list<Vehicle *> loading_vehicles;
	GoodsEntry goods[NUM_CARGO];  ///< Goods at this station
	uint32 always_accepted;       ///< Bitmask of always accepted cargo types (by houses, HQs, industry tiles when industry doesn't accept cargo)

	IndustryVector industries_near; ///< Cached list of industries near the station that can accept cargo, @see DeliverGoodsToIndustry()

	Station(TileIndex tile = INVALID_TILE);
	~Station();

	void AddFacility(StationFacility new_facility_bit, TileIndex facil_xy);

	/**
	 * Marks the tiles of the station as dirty.
	 *
	 * @ingroup dirty
	 */
	void MarkTilesDirty(bool cargo_change) const;

	void UpdateVirtCoord();

	/* virtual */ uint GetPlatformLength(TileIndex tile, DiagDirection dir) const;
	/* virtual */ uint GetPlatformLength(TileIndex tile) const;
	void RecomputeIndustriesNear();
	static void RecomputeIndustriesNearForAll();

	uint GetCatchmentRadius() const;
	Rect GetCatchmentRect() const;

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

	FORCEINLINE bool TileBelongsToAirport(TileIndex tile) const
	{
		return IsAirportTile(tile) && GetStationIndex(tile) == this->index;
	}

	FORCEINLINE TileIndex GetHangarTile(uint hangar_num) const
	{
		assert(this->airport.tile != INVALID_TILE);
		assert(hangar_num < this->GetAirportSpec()->nof_depots);
		return this->airport.tile + ToTileIndexDiff(this->GetAirportSpec()->depot_table[hangar_num]);
	}

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

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

#define FOR_ALL_STATIONS(var) FOR_ALL_BASE_STATIONS_OF_TYPE(Station, var)

#endif /* STATION_BASE_H */