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/* $Id$ */

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#ifndef  YAPF_H

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#define  YAPF_H

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#include "../debug.h"

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Trackdir YapfChooseShipTrack(Vehicle *v, TileIndex tile, DiagDirection enterdir, TrackBits tracks);

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Trackdir YapfChooseRoadTrack(Vehicle *v, TileIndex tile, DiagDirection enterdir);

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Trackdir YapfChooseRailTrack(Vehicle *v, TileIndex tile, DiagDirection enterdir, TrackdirBits trackdirs);

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uint YapfRoadVehDistanceToTile(const Vehicle* v, TileIndex tile);

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Depot* YapfFindNearestRoadDepot(const Vehicle *v);

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bool YapfFindNearestRailDepotTwoWay(Vehicle *v, int max_distance, int reverse_penalty, TileIndex* depot_tile, bool* reversed);

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bool YapfCheckReverseTrain(Vehicle* v);

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void YapfNotifyTrackLayoutChange(TileIndex tile, Track track);

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void* NpfBeginInterval(void);

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int NpfEndInterval(void* perf);

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extern int _aystar_stats_open_size;

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extern int _aystar_stats_closed_size;

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/** Base struct for track followers. */

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typedef struct FollowTrack_t

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{

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	const Vehicle*      m_veh;

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	TileIndex     m_old_tile;

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	Trackdir      m_old_td;

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	TileIndex     m_new_tile;

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	TrackdirBits  m_new_td_bits;

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	DiagDirection m_exitdir;

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	bool          m_is_tunnel;

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	bool          m_is_station;

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	int           m_tiles_skipped;

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} FollowTrack_t;

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/** track followers */

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bool FollowTrackWater    (FollowTrack_t *This, TileIndex old_tile, Trackdir old_td);

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bool FollowTrackRoad     (FollowTrack_t *This, TileIndex old_tile, Trackdir old_td);

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bool FollowTrackRail     (FollowTrack_t *This, TileIndex old_tile, Trackdir old_td);

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bool FollowTrackWaterNo90(FollowTrack_t *This, TileIndex old_tile, Trackdir old_td);

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bool FollowTrackRoadNo90 (FollowTrack_t *This, TileIndex old_tile, Trackdir old_td);

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bool FollowTrackRailNo90 (FollowTrack_t *This, TileIndex old_tile, Trackdir old_td);

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enum {

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	YAPF_TILE_LENGTH = 100,

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	YAPF_TILE_CORNER_LENGTH = 71

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};

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#endif /* YAPF_H */