#pragma once

#include <BWTA.h>
#include <vector>

#include "Common.h"
#include "GridDistances.h"

// Keep track of map information, like what tiles are walkable or buildable.

namespace UAlbertaBot
{
class The;
class Base;

class MapTools
{
	The & the;

	const size_t allMapsSize = 40;			// store this many distance maps in _allMaps

	std::map<BWAPI::TilePosition, GridDistances>
						_allMaps;			// a cache of already computed distance maps
	std::vector< std::vector<bool> >
						_terrainWalkable;	// walkable considering terrain only
	std::vector< std::vector<bool> >
						_walkable;			// walkable considering terrain and neutral units
	std::vector< std::vector<bool> >
						_buildable;
	std::vector< std::vector<bool> >
						_depotBuildable;
	bool				_hasIslandBases;

    void				setBWAPIMapData();					// reads in the map data from bwapi and stores it in our map format

	Base *				nextExpansion(bool hidden, bool wantMinerals, bool wantGas);

public:

	MapTools();

	static MapTools &	Instance();

	int		getGroundTileDistance(BWAPI::TilePosition from, BWAPI::TilePosition to);
	int		getGroundTileDistance(BWAPI::Position from, BWAPI::Position to);
	int		getGroundDistance(BWAPI::Position from, BWAPI::Position to);

	// Pass only valid tiles to these routines!
	bool	isTerrainWalkable(BWAPI::TilePosition tile) const { return _terrainWalkable[tile.x][tile.y]; };
	bool	isWalkable(BWAPI::TilePosition tile) const { return _walkable[tile.x][tile.y]; };
	bool	isBuildable(BWAPI::TilePosition tile) const { return _buildable[tile.x][tile.y]; };
	bool	isDepotBuildable(BWAPI::TilePosition tile) const { return _depotBuildable[tile.x][tile.y]; };

	bool	isBuildable(BWAPI::TilePosition tile, BWAPI::UnitType type) const;

	const std::vector<BWAPI::TilePosition> & getClosestTilesTo(BWAPI::TilePosition pos);
	const std::vector<BWAPI::TilePosition> & getClosestTilesTo(BWAPI::Position pos);

	void	drawHomeDistances();

	BWAPI::TilePosition	getNextExpansion(bool hidden, bool wantMinerals, bool wantGas);
	BWAPI::TilePosition	reserveNextExpansion(bool hidden, bool wantMinerals, bool wantGas);

	bool	hasIslandBases() const { return _hasIslandBases; };
};

}