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/* $Id$ */

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/** @file  vehicle_base.h Base class for all vehicles. */

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#ifndef VEHICLE_BASE_H

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#define VEHICLE_BASE_H

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#include "vehicle_type.h"

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#include "track_type.h"

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#include "rail_type.h"

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#include "road_type.h"

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#include "cargo_type.h"

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#include "direction_type.h"

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#include "window_type.h"

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#include "gfx_type.h"

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#include "command_type.h"

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#include "date_type.h"

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#include "player_type.h"

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#include "oldpool.h"

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#include "order_base.h"

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#include "cargopacket.h"

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#include "texteff.hpp"

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#include "group_type.h"

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#include "engine_type.h"

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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 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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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_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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	/**

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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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	byte user_def_data;

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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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	RailTypes compatible_railtypes;

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};

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enum VehicleRailFlags {

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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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	/* used for vehicle var 0xFE bit 8 (toggled each time the train is reversed, accurate for first vehicle only) */

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	VRF_TOGGLE_REVERSE = 7,

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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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	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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DECLARE_OLD_POOL(Vehicle, Vehicle, 9, 125)

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/* Some declarations of functions, so we can make them friendly */

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struct SaveLoad;

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extern const SaveLoad *GetVehicleDescription(VehicleType vt);

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extern void AfterLoadVehicles(bool clear_te_id);

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struct LoadgameState;

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extern bool LoadOldVehicle(LoadgameState *ls, int num);

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

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private:

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public:

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	char *name;              ///< Name of vehicle

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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 x_extent;           // x-extent of vehicle bounding box

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	byte y_extent;           // y-extent of vehicle bounding box

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	byte z_extent;           // z-extent of vehicle bounding box

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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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	StationID last_station_visited;

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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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	byte running_ticks;      ///< Number of ticks this vehicle was not stopped this day

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

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	uint16 load_unload_time_rem;

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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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		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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	/** Destroy all stuff that (still) needs the virtual functions to work properly */

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	void PreDestructor();

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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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	 * This method marks the area of the vehicle on the screen as dirty.

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	 * It can be use to repaint the vehicle.

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	 *

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	 * @ingroup dirty

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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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	 * 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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	/**

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	 * Gets the speed in mph that can be sent into SetDParam for string processing.

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	 * @return the vehicle's speed

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	 */

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	virtual int GetDisplaySpeed() const { return 0; }

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	/**

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	 * Gets the maximum speed in mph that can be sent into SetDParam for string processing.

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	 * @return the vehicle's maximum speed

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	 */

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	virtual int GetDisplayMaxSpeed() const { return 0; }

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	/**

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	 * Gets the running cost of a vehicle

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	 * @return the vehicle's running cost

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	 */

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	virtual Money GetRunningCost() const { return 0; }

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	/**

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	 * Check whether the vehicle is in the depot.

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	 * @return true if and only if the vehicle is in the depot.

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	 */

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	virtual bool IsInDepot() const { return false; }

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	/**

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	 * Check whether the vehicle is in the depot *and* stopped.

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	 * @return true if and only if the vehicle is in the depot and stopped.

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	 */

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	virtual bool IsStoppedInDepot() const { return this->IsInDepot() && (this->vehstatus & VS_STOPPED) != 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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	/**

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	 * Calls the new day handler of the vehicle

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	 */

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	virtual void OnNewDay() {};

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	/**

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	 * Gets the running cost of a vehicle  that can be sent into SetDParam for string processing.

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	 * @return the vehicle's running cost

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	 */

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	Money GetDisplayRunningCost() const { return (this->GetRunningCost() >> 8); }

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	/**

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	 * Gets the profit vehicle had this year. It can be sent into SetDParam for string processing.

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	 * @return the vehicle's profit this year

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	 */

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	Money GetDisplayProfitThisYear() const { return (this->profit_this_year >> 8); }

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	/**

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	 * Gets the profit vehicle had last year. It can be sent into SetDParam for string processing.

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	 * @return the vehicle's profit last year

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	 */

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	Money GetDisplayProfitLastYear() const { return (this->profit_last_year >> 8); }

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	/**

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	 * Set the next vehicle of this vehicle.

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	 * @param next the next vehicle. NULL removes the next vehicle.

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	 */

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	void SetNext(Vehicle *next);

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	/**

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	 * Get the next vehicle of this vehicle.

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	 * @note articulated parts are also counted as vehicles.

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	 * @return the next vehicle or NULL when there isn't a next vehicle.

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	 */

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	inline Vehicle *Next() const { return this->next; }

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	/**

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	 * Get the previous vehicle of this vehicle.

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	 * @note articulated parts are also counted as vehicles.

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	 * @return the previous vehicle or NULL when there isn't a previous vehicle.

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	 */

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	inline Vehicle *Previous() const { return this->previous; }

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	/**

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	 * Get the first vehicle of this vehicle chain.

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	 * @return the first vehicle of the chain.

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	 */

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	inline Vehicle *First() const { return this->first; }

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	/**

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	 * Check if we share our orders with another vehicle.

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	 * This is done by checking the previous and next pointers in the shared chain.

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	 * @return true if there are other vehicles sharing the same order

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	 */

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	inline bool IsOrderListShared() const { return this->next_shared != NULL || this->prev_shared != NULL; };

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	bool NeedsAutorenewing(const Player *p) const;

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	/**

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	 * Check if the vehicle needs to go to a depot in near future (if a opportunity presents itself) for service or replacement.

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	 *

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	 * @see NeedsAutomaticServicing()

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	 * @return true if the vehicle should go to a depot if a opportunity presents itself.

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	 */

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	bool NeedsServicing() const;

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	/**

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	 * Checks if the current order should be interupted for a service-in-depot-order.

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	 * @see NeedsServicing()

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	 * @return true if the current order should be interupted.

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	 */

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	bool NeedsAutomaticServicing() const;

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	/**

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	 * Determine the location for the station where the vehicle goes to next.

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	 * Things done for example are allocating slots in a road stop or exact

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	 * location of the platform is determined for ships.

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	 * @param station the station to make the next location of the vehicle.

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	 * @return the location (tile) to aim for.

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	 */

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	virtual TileIndex GetOrderStationLocation(StationID station) { return INVALID_TILE; }

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	/**

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	 * Find the closest depot for this vehicle and tell us the location,

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	 * DestinationID and whether we should reverse.