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/* $Id$ */

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#ifndef NEWGRF_ENGINE_H

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#define NEWGRF_ENGINE_H

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#include "direction.h"

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/** @file newgrf_engine.h

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 */

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VARDEF const uint32 _default_refitmasks[NUM_VEHICLE_TYPES];

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VARDEF const CargoID _global_cargo_id[NUM_LANDSCAPE][NUM_CARGO];

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VARDEF const uint32 _landscape_global_cargo_mask[NUM_LANDSCAPE];

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VARDEF const CargoID _local_cargo_id_ctype[NUM_GLOBAL_CID];

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VARDEF const uint32 cargo_classes[16];

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void SetWagonOverrideSprites(EngineID engine, struct SpriteGroup *group, byte *train_id, int trains);

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void SetCustomEngineSprites(EngineID engine, byte cargo, struct SpriteGroup *group);

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// loaded is in percents, overriding_engine 0xffff is none

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int GetCustomEngineSprite(EngineID engine, const Vehicle* v, Direction direction);

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uint16 GetVehicleCallback(byte callback, uint32 param1, uint32 param2, EngineID engine, const Vehicle *v);

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bool UsesWagonOverride(const Vehicle *v);

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#define GetCustomVehicleSprite(v, direction) GetCustomEngineSprite(v->engine_type, v, direction)

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#define GetCustomVehicleIcon(et, direction) GetCustomEngineSprite(et, NULL, direction)

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typedef enum VehicleTrigger {

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	VEHICLE_TRIGGER_NEW_CARGO = 1,

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	// Externally triggered only for the first vehicle in chain

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	VEHICLE_TRIGGER_DEPOT = 2,

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	// Externally triggered only for the first vehicle in chain, only if whole chain is empty

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	VEHICLE_TRIGGER_EMPTY = 4,

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	// Not triggered externally (called for the whole chain if we got NEW_CARGO)

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	VEHICLE_TRIGGER_ANY_NEW_CARGO = 8,

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} VehicleTrigger;

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void TriggerVehicle(Vehicle *veh, VehicleTrigger trigger);

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void SetCustomEngineName(EngineID engine, const char *name);

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StringID GetCustomEngineName(EngineID engine);

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void UnloadWagonOverrides(void);

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void UnloadCustomEngineSprites(void);

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void UnloadCustomEngineNames(void);

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void ResetEngineListOrder(void);

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EngineID GetRailVehAtPosition(EngineID pos);

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void AlterRailVehListOrder(EngineID engine, EngineID target);

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#endif /* NEWGRF_ENGINE_H */