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/* $Id$ */

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/** @file ai_town.cpp handles the functions of the AIRoad class */

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#include "ai_road.hpp"

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#include "../../command.h"

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#include "../../road_map.h"

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#include "../../station_map.h"

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bool AIRoad::IsRoadTile(TileIndex tile)

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{

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	/* Outside of the map */

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	if (tile >= _map_size) return false;

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	return IsTileType(tile, MP_STREET) && GetRoadTileType(tile) != ROAD_TILE_DEPOT;

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}

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bool AIRoad::BuildRoad(TileIndex start, TileIndex end)

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{

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	/* Outside of the map */

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	if (start >= _map_size || end >= _map_size || start == end) return false;

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	/* Not on one line */

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	if (TileX(start) != TileX(end) &&

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			TileY(start) != TileY(end)) return false;

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	return this->DoCommand(end, start, (TileY(start) != TileY(end) ? 4 : 0) | (start < end ? 1 : 2), CMD_BUILD_LONG_ROAD);

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}

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bool AIRoad::BuildRoadDepot(TileIndex tile, TileIndex front)

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{

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	/* Outside of the map */

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	if (tile >= _map_size || tile == front) return false;

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	uint entrance_dir = (TileX(tile) == TileX(front)) ? (TileY(tile) < TileY(front) ? 1 : 3) : (TileX(tile) < TileX(front) ? 2 : 0);

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	return this->DoCommand(tile, entrance_dir, 0, CMD_BUILD_ROAD_DEPOT);

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}

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bool AIRoad::BuildRoadStation(TileIndex tile, TileIndex front, bool truck, bool drive_through)

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{

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	/* Outside of the map */

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	if (tile >= _map_size || tile == front) return false;

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	uint entrance_dir;

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	if (drive_through) {

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		entrance_dir = TileY(tile) != TileY(front);

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	} else {

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		entrance_dir = (TileX(tile) == TileX(front)) ? (TileY(tile) < TileY(front) ? 1 : 3) : (TileX(tile) < TileX(front) ? 2 : 0);

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	}

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	return this->DoCommand(tile, entrance_dir, (drive_through ? 2 : 0) | (truck ? 1 : 0), CMD_BUILD_ROAD_STOP);

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}

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bool AIRoad::RemoveRoad(TileIndex start, TileIndex end)

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{

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	/* Outside of the map */

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	if (start >= _map_size || end >= _map_size) return false;

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	/* Not on one line */

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	if (TileX(start) != TileX(end) &&

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			TileY(start) != TileY(end)) return false;

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	return this->DoCommand(end, start, (TileY(start) != TileY(end) ? 4 : 0) | (start < end ? 1 : 2), CMD_REMOVE_LONG_ROAD);

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}

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bool AIRoad::RemoveRoadDepot(TileIndex tile)

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{

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	/* Outside of the map */

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	if (tile >= _map_size) return false;

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	/* Not a road depot tile */

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	if (!IsTileType(tile, MP_STREET) || GetRoadTileType(tile) != ROAD_TILE_DEPOT) return false;

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	return this->DoCommand(tile, 0, 0, CMD_LANDSCAPE_CLEAR);

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}

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bool AIRoad::RemoveRoadStation(TileIndex tile)

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{

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	/* Outside of the map */

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	if (tile >= _map_size) return false;

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	/* Not a road station tile */

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	if (!IsTileType(tile, MP_STATION) || !IsRoadStop(tile)) return false;

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	return this->DoCommand(tile, 0, GetRoadStopType(tile), CMD_REMOVE_ROAD_STOP);

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}