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/* $Id$ */

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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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/** 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 {

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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_INVALID = 0xFF,

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} ;

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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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};

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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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	uint16 days_since_order_progr;

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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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	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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	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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	Vehicle *other_multiheaded_part;

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};

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enum {

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	VRF_REVERSING         = 0,

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	VRF_GOINGUP           = 1,

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	VRF_GOINGDOWN         = 2,

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	VRF_POWEREDWAGON      = 3,

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	VRF_REVERSE_DIRECTION = 4,

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	VRF_NO_PATH_TO_DESTINATION = 5,

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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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	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 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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};

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struct VehicleSpecial {

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	uint16 unk0;

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	byte unk2;

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};

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struct VehicleDisaster {

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	uint16 image_override;

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	uint16 unk2;

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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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	byte type;               // type, ie roadven,train,ship,aircraft,special

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

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	VehicleID index;         // NOSAVE: Index in vehicle array

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	Vehicle *next;           // next

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

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	Vehicle *depot_list;     //NOSAVE: linked list to tell what vehicles entered a depot during the last tick. Used by autoreplace

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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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	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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	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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	byte cargo_days;         // how many days have the pieces been in transit

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	StationID cargo_source;  // source of cargo

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	TileIndex cargo_source_xy; //< stores the Tile where the source station is located, in case it is removed

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	uint16 cargo_cap;        // total capacity

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	uint16 cargo_count;      // how many pieces are used

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

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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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	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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	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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	uint16 cargo_paid_for;      // How much of the cargo currently on board has been paid for.

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

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	int32 profit_this_year;

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	int32 profit_last_year;

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	int32 cargo_feeder_share;      ///< value of feeder pickup to be paid for on delivery of cargo

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	TileIndex cargo_loaded_at_xy;  ///< tile index where feeder cargo was loaded

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	uint32 value;

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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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	void BeginLoading();

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	void LeaveStation();

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};

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#define is_custom_sprite(x) (x >= 0xFD)

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#define IS_CUSTOM_FIRSTHEAD_SPRITE(x) (x == 0xFD)

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#define IS_CUSTOM_SECONDHEAD_SPRITE(x) (x == 0xFE)

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typedef void *VehicleFromPosProc(Vehicle *v, void *data);

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void VehicleServiceInDepot(Vehicle *v);

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Vehicle *AllocateVehicle();

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bool AllocateVehicles(Vehicle **vl, int num);

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Vehicle *ForceAllocateVehicle();

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Vehicle *ForceAllocateSpecialVehicle();

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void VehiclePositionChanged(Vehicle *v);

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void AfterLoadVehicles();

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Vehicle *GetLastVehicleInChain(Vehicle *v);

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Vehicle *GetPrevVehicleInChain(const Vehicle *v);

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Vehicle *GetFirstVehicleInChain(const Vehicle *v);

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uint CountVehiclesInChain(const Vehicle* v);

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bool IsEngineCountable(const Vehicle *v);

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void DeleteVehicleChain(Vehicle *v);

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void *VehicleFromPos(TileIndex tile, void *data, VehicleFromPosProc *proc);

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void CallVehicleTicks();

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Vehicle *FindVehicleOnTileZ(TileIndex tile, byte z);

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void InitializeTrains();

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byte VehicleRandomBits();

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void ResetVehiclePosHash();

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bool CanFillVehicle(Vehicle *v);

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bool CanRefitTo(EngineID engine_type, CargoID cid_to);

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CargoID FindFirstRefittableCargo(EngineID engine_type);

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int32 GetRefitCost(EngineID engine_type);

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void ViewportAddVehicles(DrawPixelInfo *dpi);

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/* train_cmd.h */

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int GetTrainImage(const Vehicle* v, Direction direction);

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int GetAircraftImage(const Vehicle* v, Direction direction);

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int GetRoadVehImage(const Vehicle* v, Direction direction);

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int GetShipImage(const Vehicle* v, Direction direction);

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SpriteID GetRotorImage(const Vehicle *v);

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Vehicle *CreateEffectVehicle(int x, int y, int z, EffectVehicle type);

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Vehicle *CreateEffectVehicleAbove(int x, int y, int z, EffectVehicle type);

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Vehicle *CreateEffectVehicleRel(const Vehicle *v, int x, int y, int z, EffectVehicle type);

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uint32 VehicleEnterTile(Vehicle *v, TileIndex tile, int x, int y);

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StringID VehicleInTheWayErrMsg(const Vehicle* v);

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Vehicle *FindVehicleBetween(TileIndex from, TileIndex to, byte z, bool without_crashed = false);

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bool UpdateSignalsOnSegment(TileIndex tile, DiagDirection direction);

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void SetSignalsOnBothDir(TileIndex tile, byte track);

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Vehicle *CheckClickOnVehicle(const ViewPort *vp, int x, int y);

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void DecreaseVehicleValue(Vehicle *v);

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void CheckVehicleBreakdown(Vehicle *v);

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void AgeVehicle(Vehicle *v);

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void VehicleEnteredDepotThisTick(Vehicle *v);

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void BeginVehicleMove(Vehicle *v);

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void EndVehicleMove(Vehicle *v);

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void ShowAircraftViewWindow(const Vehicle* v);

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UnitID GetFreeUnitNumber(byte type);

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int LoadUnloadVehicle(Vehicle *v, bool just_arrived);

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void TrainConsistChanged(Vehicle *v);

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void TrainPowerChanged(Vehicle *v);

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int32 GetTrainRunningCost(const Vehicle *v);

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int CheckTrainStoppedInDepot(const Vehicle *v);

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bool VehicleNeedsService(const Vehicle *v);

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uint GenerateVehicleSortList(const Vehicle*** sort_list, uint16 *length_of_array, byte type, PlayerID owner, uint32 index, uint16 window_type);

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void BuildDepotVehicleList(byte type, TileIndex tile, Vehicle ***engine_list, uint16 *engine_list_length, uint16 *engine_count, Vehicle ***wagon_list, uint16 *wagon_list_length, uint16 *wagon_count);

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int32 SendAllVehiclesToDepot(byte type, uint32 flags, bool service, PlayerID owner, uint16 vlw_flag, uint32 id);

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bool IsVehicleInDepot(const Vehicle *v);

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void VehicleEnterDepot(Vehicle *v);

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void InvalidateAutoreplaceWindow(EngineID e);

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int32 MaybeReplaceVehicle(Vehicle *v, bool check, bool display_costs);

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/* Flags to add to p2 for goto depot commands */

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/* Note: bits 8-10 are used for VLW flags */

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enum {

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	DEPOT_SERVICE       = (1 << 0),	// The vehicle will leave the depot right after arrival (serivce only)

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	DEPOT_MASS_SEND     = (1 << 1), // Tells that it's a mass send to depot command (type in VLW flag)

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	DEPOT_DONT_CANCEL   = (1 << 2), // Don't cancel current goto depot command if any

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	DEPOT_LOCATE_HANGAR = (1 << 3), // Find another airport if the target one lacks a hangar

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};

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struct GetNewVehiclePosResult {

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	int x,y;

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	TileIndex old_tile;

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	TileIndex new_tile;

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};

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/**

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 * Returns the Trackdir on which the vehicle is currently located.

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 * Works for trains and ships.

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 * Currently works only sortof for road vehicles, since they have a fuzzy

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 * concept of being "on" a trackdir. Dunno really what it returns for a road

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 * vehicle that is halfway a tile, never really understood that part. For road

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 * vehicles that are at the beginning or end of the tile, should just return

   429

 * the diagonal trackdir on which they are driving. I _think_.

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 * For other vehicles types, or vehicles with no clear trackdir (such as those

   431

 * in depots), returns 0xFF.

   432

 */

   433

Trackdir GetVehicleTrackdir(const Vehicle* v);

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   435

/* returns true if staying in the same tile */

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GetNewVehiclePosResult GetNewVehiclePos(const Vehicle *v);

   437

Direction GetDirectionTowards(const Vehicle* v, int x, int y);

   438

   439

#define BEGIN_ENUM_WAGONS(v) do {

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#define END_ENUM_WAGONS(v) } while ( (v=v->next) != NULL);

   441

   442

DECLARE_OLD_POOL(Vehicle, Vehicle, 9, 125)

   443

   444

static inline VehicleID GetMaxVehicleIndex()

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{

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

   447

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

   448

	 *  _really_ returns the highest index. Now it just returns

   449

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

   450

	 */

   451

	return GetVehiclePoolSize() - 1;

   452

}

   453

   454

static inline uint GetNumVehicles()

   455

{

   456

	return GetVehiclePoolSize();

   457

}

   458

   459

/**

   460

 * Check if a Vehicle really exists.

   461

 */

   462

static inline bool IsValidVehicle(const Vehicle *v)

   463

{

   464

	return v->type != VEH_INVALID;

   465

}

   466

   467

void DestroyVehicle(Vehicle *v);

   468

   469

static inline void DeleteVehicle(Vehicle *v)

   470

{

   471

	DestroyVehicle(v);

   472

	v->type = VEH_INVALID;

   473

}

   474

   475

static inline bool IsPlayerBuildableVehicleType(byte type)

   476

{

   477

	switch (type) {

   478

		case VEH_TRAIN:

   479

		case VEH_ROAD:

   480

		case VEH_SHIP:

   481

		case VEH_AIRCRAFT:

   482

			return true;

   483

	}

   484

	return false;

   485

}

   486