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/* $Id$ */

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/** @file engine.h */

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#ifndef ENGINE_H

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#define ENGINE_H

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#include "oldpool.h"

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#include "rail.h"

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#include "sound.h"

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#include "vehicle.h"

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enum RailVehicleTypes {

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	RAILVEH_SINGLEHEAD,  ///< indicates a "standalone" locomotive

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	RAILVEH_MULTIHEAD,   ///< indicates a combination of two locomotives

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	RAILVEH_WAGON,       ///< simple wagon, not motorized

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};

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struct RailVehicleInfo {

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	byte image_index;

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	RailVehicleTypes railveh_type;

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	byte base_cost;

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	RailTypeByte railtype;

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	uint16 max_speed;

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	uint16 power;

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	uint16 weight;

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	byte running_cost_base;

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	byte running_cost_class;

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	byte engclass;         ///< 0: steam, 1: diesel, 2: electric

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	byte capacity;

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	CargoID cargo_type;

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	byte ai_rank;

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	uint16 pow_wag_power;

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	byte pow_wag_weight;

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	byte visual_effect; // NOTE: this is not 100% implemented yet, at the moment it is only used as a 'fallback' value

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	                    //       for when the 'powered wagon' callback fails. But it should really also determine what

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	                    //       kind of visual effect to generate for a vehicle (default, steam, diesel, electric).

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	                    //       Same goes for the callback result, which atm is only used to check if a wagon is powered.

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	byte shorten_factor;   ///< length on main map for this type is 8 - shorten_factor

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	byte tractive_effort; ///< Tractive effort coefficient

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	byte user_def_data;    ///< Property 0x25: "User-defined bit mask" Used only for (very few) NewGRF vehicles

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};

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struct ShipVehicleInfo {

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	byte image_index;

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	byte base_cost;

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	uint16 max_speed;

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	CargoID cargo_type;

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	uint16 capacity;

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	byte running_cost;

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	SoundFxByte sfx;

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	bool refittable;

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};

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/* AircraftVehicleInfo subtypes, bitmask type.

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 * If bit 0 is 0 then it is a helicopter, otherwise it is a plane

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 * in which case bit 1 tells us whether it's a big(fast) plane or not */

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enum {

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	AIR_HELI = 0,

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	AIR_CTOL = 1, ///< Conventional Take Off and Landing, i.e. planes

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	AIR_FAST = 2

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};

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struct AircraftVehicleInfo {

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	byte image_index;

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	byte base_cost;

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	byte running_cost;

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	byte subtype;

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	SoundFxByte sfx;

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	byte acceleration;

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	uint16 max_speed;

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	byte mail_capacity;

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	uint16 passenger_capacity;

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};

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struct RoadVehicleInfo {

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	byte image_index;

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	byte base_cost;

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	byte running_cost;

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	SoundFxByte sfx;

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	byte max_speed;

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	byte capacity;

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	CargoID cargo_type;

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};

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/** Information about a vehicle

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 *  @see table/engines.h

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 */

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struct EngineInfo {

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	Date base_intro;

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	Year lifelength;

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	Year base_life;

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	byte load_amount;

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	byte climates;

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	uint32 refit_mask;

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	byte refit_cost;

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	byte misc_flags;

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	byte callbackmask;

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};

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struct Engine {

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	Date intro_date;

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	Date age;

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	uint16 reliability;

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	uint16 reliability_spd_dec;

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	uint16 reliability_start, reliability_max, reliability_final;

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	uint16 duration_phase_1, duration_phase_2, duration_phase_3;

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	byte lifelength;

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	byte flags;

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	PlayerByte preview_player;

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	byte preview_wait;

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	byte player_avail;

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	byte type; ///< type, ie VEH_ROAD, VEH_TRAIN, etc. Same as in vehicle.h

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};

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/**

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 * EngineInfo.misc_flags is a bitmask, with the following values

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 */

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enum {

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	EF_RAIL_TILTS = 0, ///< Rail vehicle tilts in curves (unsupported)

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	EF_ROAD_TRAM  = 0, ///< Road vehicle is a tram/light rail vehicle (unsup)

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	EF_USES_2CC   = 1, ///< Vehicle uses two company colours

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	EF_RAIL_IS_MU = 2, ///< Rail vehicle is a multiple-unit (DMU/EMU)

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};

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/**

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 * Engine.flags is a bitmask, with the following values.

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 */

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enum {

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	ENGINE_AVAILABLE         = 1, ///< This vehicle is available to everyone.

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	ENGINE_EXCLUSIVE_PREVIEW = 2, ///< This vehicle is in the exclusive preview stage, either being used or being offered to a player.

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	ENGINE_OFFER_WINDOW_OPEN = 4, ///< The exclusive offer window is currently open for a player.

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};

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enum {

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	NUM_VEHICLE_TYPES = 6

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};

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static const EngineID INVALID_ENGINE = 0xFFFF;

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void AddTypeToEngines();

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void StartupEngines();

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void DrawTrainEngine(int x, int y, EngineID engine, SpriteID pal);

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void DrawRoadVehEngine(int x, int y, EngineID engine, SpriteID pal);

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void DrawShipEngine(int x, int y, EngineID engine, SpriteID pal);

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void DrawAircraftEngine(int x, int y, EngineID engine, SpriteID pal);

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void LoadCustomEngineNames();

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void DeleteCustomEngineNames();

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bool IsEngineBuildable(EngineID engine, byte type, PlayerID player);

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enum {

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	NUM_NORMAL_RAIL_ENGINES = 54,

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	NUM_MONORAIL_ENGINES    = 30,

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	NUM_MAGLEV_ENGINES      = 32,

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	NUM_TRAIN_ENGINES       = NUM_NORMAL_RAIL_ENGINES + NUM_MONORAIL_ENGINES + NUM_MAGLEV_ENGINES,

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	NUM_ROAD_ENGINES        = 88,

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	NUM_SHIP_ENGINES        = 11,

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	NUM_AIRCRAFT_ENGINES    = 41,

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	TOTAL_NUM_ENGINES       = NUM_TRAIN_ENGINES + NUM_ROAD_ENGINES + NUM_SHIP_ENGINES + NUM_AIRCRAFT_ENGINES,

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	AIRCRAFT_ENGINES_INDEX  = NUM_TRAIN_ENGINES + NUM_ROAD_ENGINES + NUM_SHIP_ENGINES,

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	SHIP_ENGINES_INDEX      = NUM_TRAIN_ENGINES + NUM_ROAD_ENGINES,

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	ROAD_ENGINES_INDEX      = NUM_TRAIN_ENGINES,

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};

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static inline EngineID GetFirstEngineOfType(byte type)

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{

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	const EngineID start[] = {0, ROAD_ENGINES_INDEX, SHIP_ENGINES_INDEX, AIRCRAFT_ENGINES_INDEX};

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	return start[type];

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}

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static inline EngineID GetLastEngineOfType(byte type)

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{

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	const EngineID end[] = {

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		NUM_TRAIN_ENGINES,

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		ROAD_ENGINES_INDEX + NUM_ROAD_ENGINES,

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		SHIP_ENGINES_INDEX + NUM_SHIP_ENGINES,

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		AIRCRAFT_ENGINES_INDEX + NUM_AIRCRAFT_ENGINES};

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	return end[type];

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}

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VARDEF Engine _engines[TOTAL_NUM_ENGINES];

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#define FOR_ALL_ENGINES(e) for (e = _engines; e != endof(_engines); e++)

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#define FOR_ALL_ENGINEIDS_OF_TYPE(e, type) for (e = GetFirstEngineOfType(type); e != GetLastEngineOfType(type); e++)

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static inline Engine* GetEngine(EngineID i)

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{

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	assert(i < lengthof(_engines));

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	return &_engines[i];

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}

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VARDEF StringID _engine_name_strings[TOTAL_NUM_ENGINES];

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static inline bool IsEngineIndex(uint index)

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{

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	return index < TOTAL_NUM_ENGINES;

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}

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/* Access Vehicle Data */

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//#include "table/engines.h"

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extern const EngineInfo orig_engine_info[TOTAL_NUM_ENGINES];

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extern const RailVehicleInfo orig_rail_vehicle_info[NUM_TRAIN_ENGINES];

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extern const ShipVehicleInfo orig_ship_vehicle_info[NUM_SHIP_ENGINES];

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extern const AircraftVehicleInfo orig_aircraft_vehicle_info[NUM_AIRCRAFT_ENGINES];

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extern const RoadVehicleInfo orig_road_vehicle_info[NUM_ROAD_ENGINES];

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extern EngineInfo _engine_info[TOTAL_NUM_ENGINES];

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extern RailVehicleInfo _rail_vehicle_info[NUM_TRAIN_ENGINES];

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extern ShipVehicleInfo _ship_vehicle_info[NUM_SHIP_ENGINES];

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extern AircraftVehicleInfo _aircraft_vehicle_info[NUM_AIRCRAFT_ENGINES];

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extern RoadVehicleInfo _road_vehicle_info[NUM_ROAD_ENGINES];

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static inline const EngineInfo *EngInfo(EngineID e)

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{

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	assert(e < lengthof(_engine_info));

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	return &_engine_info[e];

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}

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static inline const RailVehicleInfo* RailVehInfo(EngineID e)

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{

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	assert(e < lengthof(_rail_vehicle_info));

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	return &_rail_vehicle_info[e];

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}

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static inline const ShipVehicleInfo* ShipVehInfo(EngineID e)

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{

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	assert(e >= SHIP_ENGINES_INDEX && e < SHIP_ENGINES_INDEX + lengthof(_ship_vehicle_info));

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	return &_ship_vehicle_info[e - SHIP_ENGINES_INDEX];

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}

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static inline const AircraftVehicleInfo* AircraftVehInfo(EngineID e)

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{

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	assert(e >= AIRCRAFT_ENGINES_INDEX && e < AIRCRAFT_ENGINES_INDEX + lengthof(_aircraft_vehicle_info));

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	return &_aircraft_vehicle_info[e - AIRCRAFT_ENGINES_INDEX];

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}

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static inline const RoadVehicleInfo* RoadVehInfo(EngineID e)

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{

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	assert(e >= ROAD_ENGINES_INDEX && e < ROAD_ENGINES_INDEX + lengthof(_road_vehicle_info));

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	return &_road_vehicle_info[e - ROAD_ENGINES_INDEX];

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}

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/************************************************************************

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 * Engine Replacement stuff

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 ************************************************************************/

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/**

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 * Struct to store engine replacements. DO NOT USE outside of engine.c. Is

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 * placed here so the only exception to this rule, the saveload code, can use

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 * it.

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 */

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struct EngineRenew {

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	EngineRenewID index;

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	EngineID from;

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	EngineID to;

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	EngineRenew *next;

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};

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/**

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 * Memory pool for engine renew elements. DO NOT USE outside of engine.c. Is

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 * placed here so the only exception to this rule, the saveload code, can use

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 * it.

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 */

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DECLARE_OLD_POOL(EngineRenew, EngineRenew, 3, 8000)

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/**

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 * Check if a EngineRenew really exists.

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 */

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static inline bool IsValidEngineRenew(const EngineRenew *er)

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{

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	return er->from != INVALID_ENGINE;

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}

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static inline void DeleteEngineRenew(EngineRenew *er)

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{

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	er->from = INVALID_ENGINE;

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}

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#define FOR_ALL_ENGINE_RENEWS_FROM(er, start) for (er = GetEngineRenew(start); er != NULL; er = (er->index + 1U < GetEngineRenewPoolSize()) ? GetEngineRenew(er->index + 1U) : NULL) if (er->from != INVALID_ENGINE) if (IsValidEngineRenew(er))

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#define FOR_ALL_ENGINE_RENEWS(er) FOR_ALL_ENGINE_RENEWS_FROM(er, 0)

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/**

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 * A list to group EngineRenew directives together (such as per-player).

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 */

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typedef EngineRenew* EngineRenewList;

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/**

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 * Remove all engine replacement settings for the player.

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 * @return The new renewlist for the player.

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 */

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void RemoveAllEngineReplacement(EngineRenewList* erl);

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/**

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 * Retrieve the engine replacement in a given renewlist for an original engine type.

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 * @param  erl The renewlist to search in.

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 * @param  engine Engine type to be replaced.

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 * @return The engine type to replace with, or INVALID_ENGINE if no

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 * replacement is in the list.

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 */

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EngineID EngineReplacement(EngineRenewList erl, EngineID engine);

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/**

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 * Add an engine replacement to the given renewlist.

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 * @param erl The renewlist to add to.

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 * @param old_engine The original engine type.

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 * @param new_engine The replacement engine type.

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 * @param flags The calling command flags.

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 * @return 0 on success, CMD_ERROR on failure.

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 */

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int32 AddEngineReplacement(EngineRenewList* erl, EngineID old_engine, EngineID new_engine, uint32 flags);

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/**

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 * Remove an engine replacement from a given renewlist.

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 * @param erl The renewlist from which to remove the replacement

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 * @param engine The original engine type.

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 * @param flags The calling command flags.

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 * @return 0 on success, CMD_ERROR on failure.

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 */

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int32 RemoveEngineReplacement(EngineRenewList* erl, EngineID engine, uint32 flags);

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/** When an engine is made buildable or is removed from being buildable, add/remove it from the build/autoreplace lists

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 * @param type The type of engine

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 */

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void AddRemoveEngineFromAutoreplaceAndBuildWindows(byte type);

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/* Engine list manipulators - current implementation is only C wrapper of CBlobT<EngineID> class (helpers.cpp) */

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void EngList_Create(EngineList *el);            ///< Creates engine list

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void EngList_Destroy(EngineList *el);           ///< Deallocate and destroy engine list

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uint EngList_Count(const EngineList *el);       ///< Returns number of items in the engine list

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void EngList_Add(EngineList *el, EngineID eid); ///< Append one item at the end of engine list

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EngineID* EngList_Items(EngineList *el);        ///< Returns engine list items as C array

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void EngList_RemoveAll(EngineList *el);         ///< Removes all items from engine list

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typedef int CDECL EngList_SortTypeFunction(const void*, const void*); ///< argument type for EngList_Sort()

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void EngList_Sort(EngineList *el, EngList_SortTypeFunction compare); ///< qsort of the engine list

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void EngList_SortPartial(EngineList *el, EngList_SortTypeFunction compare, uint begin, uint num_items); ///< qsort of specified portion of the engine list

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#endif /* ENGINE_H */