#pragma once

#include "tile_key.hpp"
#include "std/function.hpp"
#include "std/set.hpp"

namespace df
{

using TTilesCollection = set<TileKey>;

/// This function determines the coverage of a tile in specified zoom level.
void CalcTilesCoverage(TileKey const & tileKey, int targetZoom, TTilesCollection & tiles);

/// This function determines the coverage of tiles in specified zoom level.
void CalcTilesCoverage(set<TileKey> const & tileKeys, int targetZoom, TTilesCollection & tiles);

/// This function determines the coverage of a tile in specified zoom level. Each new tile can be processed.
/// in processTile callback.
void CalcTilesCoverage(TileKey const & tileKey, int targetZoom, function<void(TileKey const &)> const & processTile);

/// This function checks if targetTileKey is above tileKey.
bool IsTileAbove(TileKey const & tileKey, TileKey const & targetTileKey);

/// This function checks if targetTileKey is below tileKey.
bool IsTileBelow(TileKey const & tileKey, TileKey const & targetTileKey);

/// This function returns parent tile on specified zoom level.
TileKey GetParentTile(TileKey const & tileKey, int targetZoom);

bool IsNeighbours(TileKey const & tileKey1, TileKey const & tileKey2);

} // namespace df