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/* $Id$ */

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/** @file waypoint.h Base of waypoints. */

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#ifndef WAYPOINT_H

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#define WAYPOINT_H

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#include "waypoint_type.h"

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#include "oldpool.h"

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#include "rail_map.h"

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#include "command_type.h"

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#include "station_type.h"

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#include "town_type.h"

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#include "viewport_type.h"

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DECLARE_OLD_POOL(Waypoint, Waypoint, 3, 8000)

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struct Waypoint : PoolItem<Waypoint, WaypointID, &_Waypoint_pool> {

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	TileIndex xy;      ///< Tile of waypoint

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	TownID town_index; ///< Town associated with the waypoint

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	uint16 town_cn;    ///< The Nth waypoint for this town (consecutive number)

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	StringID string;   ///< C000-C03F have special meaning in old games

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	char *name;        ///< Custom name. If not set, town + town_cn is used for naming

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	ViewportSign sign; ///< Dimensions of sign (not saved)

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	Date build_date;   ///< Date of construction

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	byte stat_id;      ///< ID of waypoint within the waypoint class (not saved)

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	uint32 grfid;      ///< ID of GRF file

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	byte localidx;     ///< Index of station within GRF file

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	byte deleted;      ///< Delete counter. If greater than 0 then it is decremented until it reaches 0; the waypoint is then is deleted.

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	Waypoint(TileIndex tile = 0);

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	~Waypoint();

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	inline bool IsValid() const { return this->xy != 0; }

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};

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static inline bool IsValidWaypointID(WaypointID index)

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{

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	return index < GetWaypointPoolSize() && GetWaypoint(index)->IsValid();

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}

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static inline void DeleteWaypoint(Waypoint *wp)

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{

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	wp->~Waypoint();

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}

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#define FOR_ALL_WAYPOINTS_FROM(wp, start) for (wp = GetWaypoint(start); wp != NULL; wp = (wp->index + 1U < GetWaypointPoolSize()) ? GetWaypoint(wp->index + 1U) : NULL) if (wp->IsValid())

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#define FOR_ALL_WAYPOINTS(wp) FOR_ALL_WAYPOINTS_FROM(wp, 0)

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/**

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 * Fetch a waypoint by tile

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 * @param tile Tile of waypoint

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 * @return Waypoint

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 */

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static inline Waypoint *GetWaypointByTile(TileIndex tile)

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{

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	assert(IsTileType(tile, MP_RAILWAY) && IsRailWaypoint(tile));

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	return GetWaypoint(GetWaypointIndex(tile));

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}

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CommandCost RemoveTrainWaypoint(TileIndex tile, uint32 flags, bool justremove);

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Station *ComposeWaypointStation(TileIndex tile);

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void ShowRenameWaypointWindow(const Waypoint *cp);

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void DrawWaypointSprite(int x, int y, int stat_id, RailType railtype);

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void FixOldWaypoints();

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void UpdateAllWaypointSigns();

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void AfterLoadWaypoints();

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#endif /* WAYPOINT_H */