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/* $Id$ */

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/** @vehicle.h */

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#ifndef VEHICLE_H

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#define VEHICLE_H

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#include "oldpool.h"

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#include "order.h"

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#include "rail.h"

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#include "road.h"

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#include "cargopacket.h"

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#include "texteff.hpp"

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/** The returned bits of VehicleEnterTile. */

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enum VehicleEnterTileStatus {

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	VETS_ENTERED_STATION  = 1, ///< The vehicle entered a station

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	VETS_ENTERED_WORMHOLE = 2, ///< The vehicle either entered a bridge, tunnel or depot tile (this includes the last tile of the bridge/tunnel)

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	VETS_CANNOT_ENTER     = 3, ///< The vehicle cannot enter the tile

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	/**

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	 * Shift the VehicleEnterTileStatus this many bits

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	 * to the right to get the station ID when

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	 * VETS_ENTERED_STATION is set

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	 */

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	VETS_STATION_ID_OFFSET = 8,

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	/** Bit sets of the above specified bits */

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	VETSB_CONTINUE         = 0,                          ///< The vehicle can continue normally

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	VETSB_ENTERED_STATION  = 1 << VETS_ENTERED_STATION,  ///< The vehicle entered a station

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	VETSB_ENTERED_WORMHOLE = 1 << VETS_ENTERED_WORMHOLE, ///< The vehicle either entered a bridge, tunnel or depot tile (this includes the last tile of the bridge/tunnel)

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	VETSB_CANNOT_ENTER     = 1 << VETS_CANNOT_ENTER,     ///< The vehicle cannot enter the tile

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};

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/** Road vehicle states */

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enum RoadVehicleStates {

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	/*

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	 * Lower 4 bits are used for vehicle track direction. (Trackdirs)

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	 * When in a road stop (bit 5 or bit 6 set) these bits give the

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	 * track direction of the entry to the road stop.

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	 * As the entry direction will always be a diagonal

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	 * direction (X_NE, Y_SE, X_SW or Y_NW) only bits 0 and 3

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	 * are needed to hold this direction. Bit 1 is then used to show

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	 * that the vehicle is using the second road stop bay.

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	 * Bit 2 is then used for drive-through stops to show the vehicle

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	 * is stopping at this road stop.

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	 */

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	/* Numeric values */

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	RVSB_IN_DEPOT                = 0xFE,                      ///< The vehicle is in a depot

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	RVSB_WORMHOLE                = 0xFF,                      ///< The vehicle is in a tunnel and/or bridge

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	/* Bit numbers */

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	RVS_USING_SECOND_BAY         =    1,                      ///< Only used while in a road stop

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	RVS_IS_STOPPING              =    2,                      ///< Only used for drive-through stops. Vehicle will stop here

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	RVS_DRIVE_SIDE               =    4,                      ///< Only used when retrieving move data

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	RVS_IN_ROAD_STOP             =    5,                      ///< The vehicle is in a road stop

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	RVS_IN_DT_ROAD_STOP          =    6,                      ///< The vehicle is in a drive-through road stop

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	/* Bit sets of the above specified bits */

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	RVSB_IN_ROAD_STOP            = 1 << RVS_IN_ROAD_STOP,     ///< The vehicle is in a road stop

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	RVSB_IN_ROAD_STOP_END        = RVSB_IN_ROAD_STOP + TRACKDIR_END,

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	RVSB_IN_DT_ROAD_STOP         = 1 << RVS_IN_DT_ROAD_STOP,  ///< The vehicle is in a drive-through road stop

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	RVSB_IN_DT_ROAD_STOP_END     = RVSB_IN_DT_ROAD_STOP + TRACKDIR_END,

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	RVSB_TRACKDIR_MASK           = 0x0F,                      ///< The mask used to extract track dirs

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	RVSB_ROAD_STOP_TRACKDIR_MASK = 0x09                       ///< Only bits 0 and 3 are used to encode the trackdir for road stops

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};

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enum VehicleType {

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	VEH_TRAIN,

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	VEH_ROAD,

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	VEH_SHIP,

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	VEH_AIRCRAFT,

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	VEH_SPECIAL,

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	VEH_DISASTER,

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	VEH_END,

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	VEH_INVALID = 0xFF,

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};

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DECLARE_POSTFIX_INCREMENT(VehicleType);

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template <> struct EnumPropsT<VehicleType> : MakeEnumPropsT<VehicleType, byte, VEH_TRAIN, VEH_END, VEH_INVALID> {};

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typedef TinyEnumT<VehicleType> VehicleTypeByte;

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enum VehStatus {

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	VS_HIDDEN          = 0x01,

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	VS_STOPPED         = 0x02,

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	VS_UNCLICKABLE     = 0x04,

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	VS_DEFPAL          = 0x08,

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	VS_TRAIN_SLOWING   = 0x10,

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	VS_SHADOW          = 0x20,

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	VS_AIRCRAFT_BROKEN = 0x40,

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	VS_CRASHED         = 0x80,

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};

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enum VehicleFlags {

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	VF_LOADING_FINISHED,

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	VF_CARGO_UNLOADING,

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	VF_BUILT_AS_PROTOTYPE,

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	VF_TIMETABLE_STARTED,  ///< Whether the vehicle has started running on the timetable yet.

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	VF_AUTOFILL_TIMETABLE, ///< Whether the vehicle should fill in the timetable automatically.

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};

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/* Effect vehicle types */

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enum EffectVehicle {

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	EV_CHIMNEY_SMOKE   = 0,

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	EV_STEAM_SMOKE     = 1,

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	EV_DIESEL_SMOKE    = 2,

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	EV_ELECTRIC_SPARK  = 3,

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	EV_SMOKE           = 4,

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	EV_EXPLOSION_LARGE = 5,

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	EV_BREAKDOWN_SMOKE = 6,

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	EV_EXPLOSION_SMALL = 7,

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	EV_BULLDOZER       = 8,

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	EV_BUBBLE          = 9

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};

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struct VehicleRail {

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	uint16 last_speed; // NOSAVE: only used in UI

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	uint16 crash_anim_pos;

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	/* cached values, recalculated on load and each time a vehicle is added to/removed from the consist. */

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	uint16 cached_max_speed;  // max speed of the consist. (minimum of the max speed of all vehicles in the consist)

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	uint32 cached_power;      // total power of the consist.

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	uint8 cached_veh_length;  // length of this vehicle in units of 1/8 of normal length, cached because this can be set by a callback

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	uint16 cached_total_length; ///< Length of the whole train, valid only for first engine.

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	/* cached values, recalculated when the cargo on a train changes (in addition to the conditions above) */

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	uint32 cached_weight;     // total weight of the consist.

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	uint32 cached_veh_weight; // weight of the vehicle.

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	uint32 cached_max_te;     // max tractive effort of consist

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	/**

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	 * Position/type of visual effect.

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	 * bit 0 - 3 = position of effect relative to vehicle. (0 = front, 8 = centre, 15 = rear)

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	 * bit 4 - 5 = type of effect. (0 = default for engine class, 1 = steam, 2 = diesel, 3 = electric)

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	 * bit     6 = disable visual effect.

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	 * bit     7 = disable powered wagons.

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	 */

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	byte cached_vis_effect;

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	/* NOSAVE: for wagon override - id of the first engine in train

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	 * 0xffff == not in train */

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	EngineID first_engine;

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	TrackBitsByte track;

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	byte force_proceed;

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	RailTypeByte railtype;

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	RailTypeMask compatible_railtypes;

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	byte flags;

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	/* Link between the two ends of a multiheaded engine */

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	Vehicle *other_multiheaded_part;

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	/* Cached wagon override spritegroup */

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	const struct SpriteGroup *cached_override;

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};

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enum {

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	VRF_REVERSING         = 0,

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	/* used to calculate if train is going up or down */

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	VRF_GOINGUP           = 1,

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	VRF_GOINGDOWN         = 2,

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	/* used to store if a wagon is powered or not */

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	VRF_POWEREDWAGON      = 3,

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	/* used to reverse the visible direction of the vehicle */

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	VRF_REVERSE_DIRECTION = 4,

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	/* used to mark train as lost because PF can't find the route */

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	VRF_NO_PATH_TO_DESTINATION = 5,

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	/* used to mark that electric train engine is allowed to run on normal rail */

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	VRF_EL_ENGINE_ALLOWED_NORMAL_RAIL = 6,

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};

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struct VehicleAir {

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	uint16 crashed_counter;

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	uint16 cached_max_speed;

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	byte pos;

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	byte previous_pos;

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	StationID targetairport;

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	byte state;

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};

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struct VehicleRoad {

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	byte state;             ///< @see RoadVehicleStates

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	byte frame;

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	uint16 blocked_ctr;

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	byte overtaking;

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	byte overtaking_ctr;

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	uint16 crashed_ctr;

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	byte reverse_ctr;

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	struct RoadStop *slot;

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	byte slot_age;

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	EngineID first_engine;

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	byte cached_veh_length;

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	RoadType roadtype;

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	RoadTypes compatible_roadtypes;

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};

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struct VehicleSpecial {

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	uint16 animation_state;

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	byte animation_substate;

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};

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struct VehicleDisaster {

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	uint16 image_override;

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	VehicleID big_ufo_destroyer_target;

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};

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struct VehicleShip {

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	TrackBitsByte state;

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};

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struct Vehicle;

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DECLARE_OLD_POOL(Vehicle, Vehicle, 9, 125)

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struct Vehicle : PoolItem<Vehicle, VehicleID, &_Vehicle_pool> {

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	VehicleTypeByte type;    ///< Type of vehicle

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	byte subtype;            // subtype (Filled with values from EffectVehicles/TrainSubTypes/AircraftSubTypes)

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	Vehicle *first;          // NOSAVE: pointer to the first vehicle in the chain

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	StringID string_id;      // Displayed string

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	UnitID unitnumber;       // unit number, for display purposes only

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	PlayerByte owner;        // which player owns the vehicle?

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	TileIndex tile;          // Current tile index

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	TileIndex dest_tile;     // Heading for this tile

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	int32 x_pos;             // coordinates

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	int32 y_pos;

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	byte z_pos;

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	DirectionByte direction; // facing

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	byte spritenum;          // currently displayed sprite index

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	                         // 0xfd == custom sprite, 0xfe == custom second head sprite

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	                         // 0xff == reserved for another custom sprite

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	uint16 cur_image;        // sprite number for this vehicle

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	byte sprite_width;       // width of vehicle sprite

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	byte sprite_height;      // height of vehicle sprite

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	byte z_height;           // z-height of vehicle sprite

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	int8 x_offs;             // x offset for vehicle sprite

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	int8 y_offs;             // y offset for vehicle sprite

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	EngineID engine_type;

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	TextEffectID fill_percent_te_id; // a text-effect id to a loading indicator object

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	/* for randomized variational spritegroups

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	 * bitmask used to resolve them; parts of it get reseeded when triggers

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	 * of corresponding spritegroups get matched */

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	byte random_bits;

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	byte waiting_triggers;   // triggers to be yet matched

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	uint16 max_speed;        // maximum speed

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	uint16 cur_speed;        // current speed

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	byte subspeed;           // fractional speed

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	byte acceleration;       // used by train & aircraft

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	byte progress;

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	uint32 motion_counter;

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	byte vehstatus;          // Status

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	StationID last_station_visited;

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	CargoID cargo_type;      // type of cargo this vehicle is carrying

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	uint16 cargo_cap;        // total capacity

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	byte cargo_subtype;      ///< Used for livery refits (NewGRF variations)

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	CargoList cargo;         ///< The cargo this vehicle is carrying

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	byte day_counter;        // increased by one for each day

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	byte tick_counter;       // increased by one for each tick

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	/* Begin Order-stuff */

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	Order current_order;     ///< The current order (+ status, like: loading)

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	VehicleOrderID cur_order_index; ///< The index to the current order

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	Order *orders;           ///< Pointer to the first order for this vehicle

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	VehicleOrderID num_orders;      ///< How many orders there are in the list

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	Vehicle *next_shared;    ///< If not NULL, this points to the next vehicle that shared the order

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	Vehicle *prev_shared;    ///< If not NULL, this points to the prev vehicle that shared the order

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	/* End Order-stuff */

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	/* Boundaries for the current position in the world and a next hash link.

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	 * NOSAVE: All of those can be updated with VehiclePositionChanged() */

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	int32 left_coord;

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	int32 top_coord;

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	int32 right_coord;

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	int32 bottom_coord;

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	Vehicle *next_hash;

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	Vehicle *next_new_hash;

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	Vehicle **old_new_hash;

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	/* Related to age and service time */

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	Date age;     // Age in days

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	Date max_age; // Maximum age

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	Date date_of_last_service;

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	Date service_interval;

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	uint16 reliability;

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	uint16 reliability_spd_dec;

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	byte breakdown_ctr;

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	byte breakdown_delay;

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	byte breakdowns_since_last_service;

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	byte breakdown_chance;

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	Year build_year;

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	bool leave_depot_instantly; // NOSAVE: stores if the vehicle needs to leave the depot it just entered. Used by autoreplace

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	uint16 load_unload_time_rem;

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	byte vehicle_flags;         // Used for gradual loading and other miscellaneous things (@see VehicleFlags enum)

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	Money profit_this_year;

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	Money profit_last_year;

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	Money value;

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	GroupID group_id;              ///< Index of group Pool array

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	/* Used for timetabling. */

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	uint32 current_order_time;     ///< How many ticks have passed since this order started.

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	int32 lateness_counter;        ///< How many ticks late (or early if negative) this vehicle is.

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	union {

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		VehicleRail rail;

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		VehicleAir air;

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		VehicleRoad road;

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		VehicleSpecial special;

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		VehicleDisaster disaster;

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		VehicleShip ship;

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	} u;

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	/**

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	 * Allocates a lot of vehicles.

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	 * @param vl pointer to an array of vehicles to get allocated. Can be NULL if the vehicles aren't needed (makes it test only)

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	 * @param num number of vehicles to allocate room for

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	 * @return true if there is room to allocate all the vehicles

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	 */

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	static bool AllocateList(Vehicle **vl, int num);

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	/** Create a new vehicle */

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	Vehicle();

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

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	virtual ~Vehicle();

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	void BeginLoading();

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	void LeaveStation();

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	/**

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	 * Handle the loading of the vehicle; when not it skips through dummy

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	 * orders and does nothing in all other cases.

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	 * @param mode is the non-first call for this vehicle in this tick?

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	 */

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	void HandleLoading(bool mode = false);

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	/**

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	 * Get a string 'representation' of the vehicle type.

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	 * @return the string representation.

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	 */

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	virtual const char* GetTypeString() const { return "base vehicle"; }

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	/**

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	 * Marks the vehicles to be redrawn and updates cached variables

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	 */

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	virtual void MarkDirty() {}

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	/**

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	 * Updates the x and y offsets and the size of the sprite used

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	 * for this vehicle.

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	 * @param direction the direction the vehicle is facing

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	 */

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	virtual void UpdateDeltaXY(Direction direction) {}

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	/**

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	 * Sets the expense type associated to this vehicle type

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	 * @param income whether this is income or (running) expenses of the vehicle

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	 */

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	virtual ExpensesType GetExpenseType(bool income) const { return EXPENSES_OTHER; }

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	/**

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	 * Invalidates the vehicle list window of this type of vehicle

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	 */

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	virtual WindowClass GetVehicleListWindowClass() const { return WC_NONE; }

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	/**

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	 * Play the sound associated with leaving the station

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	 */

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	virtual void PlayLeaveStationSound() const {}

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	/**

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	 * Whether this is the primary vehicle in the chain.

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	 */

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	virtual bool IsPrimaryVehicle() const { return false; }

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	/**

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	 * Whether this vehicle understands the concept of a front engine, so

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	 * basically, if GetFirstVehicleInChain() can be called for it.

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	 */

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	virtual bool HasFront() const { return false; }

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	/**

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	 * Gets the sprite to show for the given direction

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	 * @param direction the direction the vehicle is facing

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	 * @return the sprite for the given vehicle in the given direction

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	 */

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	virtual int GetImage(Direction direction) const { return 0; }

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	/**

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	 * Calls the tick handler of the vehicle

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	 */

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	virtual void Tick() {};

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