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/* $Id$ */

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/** @file station_base.h Base classes/functions for stations. */

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#ifndef STATION_BASE_H

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#define STATION_BASE_H

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#include "station_type.h"

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#include "airport.h"

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#include "oldpool.h"

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#include "cargopacket.h"

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#include "cargo_type.h"

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#include "town_type.h"

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#include "strings_type.h"

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#include "date_type.h"

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#include "vehicle_type.h"

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#include "player_type.h"

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#include "core/geometry_type.hpp"

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#include <list>

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DECLARE_OLD_POOL(Station, Station, 6, 1000)

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DECLARE_OLD_POOL(RoadStop, RoadStop, 5, 2000)

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static const byte INITIAL_STATION_RATING = 175;

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struct GoodsEntry {

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	enum AcceptancePickup {

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		ACCEPTANCE,

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		PICKUP

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	};

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	GoodsEntry() :

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		acceptance_pickup(0),

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		days_since_pickup(255),

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		rating(INITIAL_STATION_RATING),

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		last_speed(0),

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		last_age(255)

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	{}

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	byte acceptance_pickup;

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	byte days_since_pickup;

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	byte rating;

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	byte last_speed;

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	byte last_age;

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	CargoList cargo; ///< The cargo packets of cargo waiting in this station

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};

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/** A Stop for a Road Vehicle */

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struct RoadStop : PoolItem<RoadStop, RoadStopID, &_RoadStop_pool> {

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	static const int  cDebugCtorLevel =  5;  ///< Debug level on which Contructor / Destructor messages are printed

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	static const uint LIMIT           = 16;  ///< The maximum amount of roadstops that are allowed at a single station

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	static const uint MAX_BAY_COUNT   =  2;  ///< The maximum number of loading bays

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	TileIndex        xy;                    ///< Position on the map

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	byte             status;                ///< Current status of the Stop. Like which spot is taken. Access using *Bay and *Busy functions.

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	byte             num_vehicles;          ///< Number of vehicles currently slotted to this stop

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	struct RoadStop  *next;                 ///< Next stop of the given type at this station

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	RoadStop(TileIndex tile = 0);

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	virtual ~RoadStop();

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	/**

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	 * Determines whether a road stop exists

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	 * @return true if and only is the road stop exists

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	 */

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	inline bool IsValid() const { return this->xy != 0; }

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	/* For accessing status */

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	bool HasFreeBay() const;

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	bool IsFreeBay(uint nr) const;

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	uint AllocateBay();

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	void AllocateDriveThroughBay(uint nr);

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	void FreeBay(uint nr);

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	bool IsEntranceBusy() const;

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	void SetEntranceBusy(bool busy);

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	RoadStop *GetNextRoadStop(const Vehicle *v) const;

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};

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struct StationSpecList {

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	const StationSpec *spec;

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	uint32 grfid;      ///< GRF ID of this custom station

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	uint8  localidx;   ///< Station ID within GRF of station

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};

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/** StationRect - used to track station spread out rectangle - cheaper than scanning whole map */

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struct StationRect : public Rect {

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	enum StationRectMode

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	{

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		ADD_TEST = 0,

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		ADD_TRY,

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		ADD_FORCE

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	};

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	StationRect();

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	void MakeEmpty();

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	bool PtInExtendedRect(int x, int y, int distance = 0) const;

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	bool IsEmpty() const;

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	bool BeforeAddTile(TileIndex tile, StationRectMode mode);

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	bool BeforeAddRect(TileIndex tile, int w, int h, StationRectMode mode);

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	bool AfterRemoveTile(Station *st, TileIndex tile);

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	bool AfterRemoveRect(Station *st, TileIndex tile, int w, int h);

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	static bool ScanForStationTiles(StationID st_id, int left_a, int top_a, int right_a, int bottom_a);

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	StationRect& operator = (Rect src);

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};

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struct Station : PoolItem<Station, StationID, &_Station_pool> {

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public:

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	RoadStop *GetPrimaryRoadStop(RoadStopType type) const

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	{

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		return type == ROADSTOP_BUS ? bus_stops : truck_stops;

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	}

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	RoadStop *GetPrimaryRoadStop(const Vehicle *v) const;

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	const AirportFTAClass *Airport() const

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	{

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		if (airport_tile == 0) return GetAirport(AT_DUMMY);

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		return GetAirport(airport_type);

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	}

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	TileIndex xy;

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	RoadStop *bus_stops;

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	RoadStop *truck_stops;

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	TileIndex train_tile;

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	TileIndex airport_tile;

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	TileIndex dock_tile;

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	Town *town;

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	StringID string_id;     ///< Default name (town area) of station

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	char *name;             ///< Custom name

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	ViewportSign sign;

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	uint16 had_vehicle_of_type;

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	byte time_since_load;

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	byte time_since_unload;

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	byte delete_ctr;

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	PlayerByte owner;

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	byte facilities;

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	byte airport_type;

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	/* trainstation width/height */

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	byte trainst_w, trainst_h;

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	/** List of custom stations (StationSpecs) allocated to the station */

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	uint8 num_specs;

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	StationSpecList *speclist;

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	Date build_date;

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

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	byte last_vehicle_type;

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	std::list<Vehicle *> loading_vehicles;

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	GoodsEntry goods[NUM_CARGO];

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	uint16 random_bits;

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	byte waiting_triggers;

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	StationRect rect; ///< Station spread out rectangle (not saved) maintained by StationRect_xxx() functions

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	static const int cDebugCtorLevel = 5;

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	Station(TileIndex tile = 0);

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	virtual ~Station();

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	void AddFacility(byte new_facility_bit, TileIndex facil_xy);

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	/**

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	 * Mark the sign of a station dirty for repaint.

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	 *

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	 * @ingroup dirty

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	 */

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	void MarkDirty() const;

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	/**

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	 * Marks the tiles of the station as dirty.

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	 *

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	 * @ingroup dirty

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	 */

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	void MarkTilesDirty(bool cargo_change) const;

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	bool TileBelongsToRailStation(TileIndex tile) const;

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	uint GetPlatformLength(TileIndex tile, DiagDirection dir) const;

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	uint GetPlatformLength(TileIndex tile) const;

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	bool IsBuoy() const;

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	/**

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	 * Determines whether a station exists

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	 * @return true if and only is the station exists

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	 */

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	inline bool IsValid() const { return this->xy != 0; }

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};

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static inline StationID GetMaxStationIndex()

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{

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	/* TODO - This isn't the real content of the function, but

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	 *  with the new pool-system this will be replaced with one that

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	 *  _really_ returns the highest index. Now it just returns

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	 *  the next safe value we are sure about everything is below.

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	 */

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	return GetStationPoolSize() - 1;

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}

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static inline uint GetNumStations()

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{

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	return GetStationPoolSize();

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}

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static inline bool IsValidStationID(StationID index)

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{

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	return index < GetStationPoolSize() && GetStation(index)->IsValid();

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}

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#define FOR_ALL_STATIONS_FROM(st, start) for (st = GetStation(start); st != NULL; st = (st->index + 1U < GetStationPoolSize()) ? GetStation(st->index + 1U) : NULL) if (st->IsValid())

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#define FOR_ALL_STATIONS(st) FOR_ALL_STATIONS_FROM(st, 0)

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/* Stuff for ROADSTOPS */

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#define FOR_ALL_ROADSTOPS_FROM(rs, start) for (rs = GetRoadStop(start); rs != NULL; rs = (rs->index + 1U < GetRoadStopPoolSize()) ? GetRoadStop(rs->index + 1U) : NULL) if (rs->IsValid())

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#define FOR_ALL_ROADSTOPS(rs) FOR_ALL_ROADSTOPS_FROM(rs, 0)

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/* End of stuff for ROADSTOPS */

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#endif /* STATION_BASE_H */