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/* $Id$ */

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/** @file aircraft.h */

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#ifndef AIRCRAFT_H

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#define AIRCRAFT_H

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#include "station_map.h"

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#include "engine.h"

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/** An aircraft can be one ot those types */

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enum AircraftSubType {

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	AIR_HELICOPTER = 0, ///< an helicopter

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	AIR_AIRCRAFT   = 2, ///< an airplane

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	AIR_SHADOW     = 4, ///< shadow of the aircraft

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	AIR_ROTOR      = 6  ///< rotor of an helicopter

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};

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/** Check if the aircraft type is a normal flying device; eg

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 * not a rotor or a shadow

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 * @param v vehicle to check

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 * @return Returns true if the aircraft is a helicopter/airplane and

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 * false if it is a shadow or a rotor) */

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static inline bool IsNormalAircraft(const Vehicle *v)

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{

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	assert(v->type == VEH_AIRCRAFT);

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	/* To be fully correct the commented out functionality is the proper one,

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	 * but since value can only be 0 or 2, it is sufficient to only check <= 2

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	 * return (v->subtype == AIR_HELICOPTER) || (v->subtype == AIR_AIRCRAFT);

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	 * limited to lower 3 bits so that seaplanes are still regarded as normal aircraft */

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	return (v->subtype & 0x07) <= AIR_AIRCRAFT;

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}

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/** Checks if an aircraft can use the station in question

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 * @param engine The engine to test

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 * @param st The station

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 * @return true if the aircraft can use the station

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 */

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static inline bool CanAircraftUseStation(EngineID engine, const Station *st)

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{

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	const AirportFTAClass *apc = st->Airport();

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	const AircraftVehicleInfo *avi = AircraftVehInfo(engine);

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	if ((apc->flags & AirportFTAClass::SEAPLANES) && ((avi->subtype & AirportFTAClass::SEAPLANES) == 0)) return false;

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	return (apc->flags & (avi->subtype & AIR_CTOL ? AirportFTAClass::AIRPLANES : AirportFTAClass::HELICOPTERS)) != 0;

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}

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/** Checks if an aircraft can use the station at the tile in question

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 * @param engine The engine to test

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 * @param tile The tile where the station is

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 * @return true if the aircraft can use the station

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 */

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static inline bool CanAircraftUseStation(EngineID engine, TileIndex tile)

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{

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	return CanAircraftUseStation(engine, GetStationByTile(tile));

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}

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/**

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 * Calculates cargo capacity based on an aircraft's passenger

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 * and mail capacities.

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 * @param cid Which cargo type to calculate a capacity for.

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 * @param avi Which engine to find a cargo capacity for.

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 * @return New cargo capacity value.

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 */

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uint16 AircraftDefaultCargoCapacity(CargoID cid, const AircraftVehicleInfo *avi);

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/**

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 * This is the Callback method after the construction attempt of an aircraft

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 * @param success indicates completion (or not) of the operation

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 * @param tile of depot where aircraft is built

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 * @param p1 unused

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 * @param p2 unused

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 */

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void CcBuildAircraft(bool success, TileIndex tile, uint32 p1, uint32 p2);

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/** Handle Aircraft specific tasks when a an Aircraft enters a hangar

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 * @param *v Vehicle that enters the hangar

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 */

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void HandleAircraftEnterHangar(Vehicle *v);

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/** Get the size of the sprite of an aircraft sprite heading west (used for lists)

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 * @param engine The engine to get the sprite from

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 * @param width The width of the sprite

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 * @param height The height of the sprite

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 */

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void GetAircraftSpriteSize(EngineID engine, uint &width, uint &height);

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/**

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 * Updates the status of the Aircraft heading or in the station

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 * @param st Station been updated

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 */

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void UpdateAirplanesOnNewStation(const Station *st);

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/** Update cached values of an aircraft.

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 * Currently caches callback 36 max speed.

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 * @param v Vehicle

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 */

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void UpdateAircraftCache(Vehicle *v);

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/**

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 * This class 'wraps' Vehicle; you do not actually instantiate this class.

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 * You create a Vehicle using AllocateVehicle, so it is added to the pool

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 * and you reinitialize that to a Train using:

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 *   v = new (v) Aircraft();

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 *

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 * As side-effect the vehicle type is set correctly.

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 */

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struct Aircraft : public Vehicle {

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	/** Initializes the Vehicle to an aircraft */

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	Aircraft() { this->type = VEH_AIRCRAFT; }

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	/** We want to 'destruct' the right class. */

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	virtual ~Aircraft() { this->PreDestructor(); }

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	const char *GetTypeString() const { return "aircraft"; }

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	void MarkDirty();

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	void UpdateDeltaXY(Direction direction);

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	ExpensesType GetExpenseType(bool income) const { return income ? EXPENSES_AIRCRAFT_INC : EXPENSES_AIRCRAFT_RUN; }

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	WindowClass GetVehicleListWindowClass() const { return WC_AIRCRAFT_LIST; }

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	bool IsPrimaryVehicle() const { return IsNormalAircraft(this); }

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	int GetImage(Direction direction) const;

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	int GetDisplaySpeed() const { return this->cur_speed * 10 / 16; }

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	int GetDisplayMaxSpeed() const { return this->max_speed * 10 / 16; }

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	Money GetRunningCost() const { return AircraftVehInfo(this->engine_type)->running_cost * _price.aircraft_running; }

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	bool IsInDepot() const { return (this->vehstatus & VS_HIDDEN) != 0 && IsHangarTile(this->tile); }

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	void Tick();

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};

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#endif /* AIRCRAFT_H */