#ifndef INTCODE_COORD_HPP_
#define INTCODE_COORD_HPP_

#include <functional>
#include <map>
#include <ostream>
#include <tuple>

#include <intcode/Machine.hpp>

namespace intcode {

/// Cartesian coordinate
///
/// Coordinate where y grows down and x grows right
struct Coord {
  std::int64_t x, y;
  auto operator<=>(const Coord&) const = default;
};


auto Draw(std::ostream & out, std::map<Coord, ValueType> image) -> void;

/// Move one unit up
auto Up(Coord) -> Coord;

/// Move one unit down
auto Down(Coord) -> Coord;

/// Move one unit left
auto Left(Coord) -> Coord;

/// Move one unit right
auto Right(Coord) -> Coord;

/// Mirror coordinates about y=x line
auto Invert(Coord) -> Coord;

/// Rotate clockwise
auto CW(Coord) -> Coord;

/// Rotate counter-clockwise
auto CCW(Coord) -> Coord;

/// Add two coordinates pairwise
auto operator+(Coord, Coord) -> Coord;

/// Subtract two coordinates pairwise
auto operator-(Coord, Coord) -> Coord;

/// Compound assignment addition of coordinates
auto operator+=(Coord &, Coord) -> Coord &;

/// Compound assignment subtraction of coordinates
auto operator-=(Coord &, Coord) -> Coord &;

/// Write a coordinate to a string "(x,y)"
auto operator<<(std::ostream &, Coord) -> std::ostream &;

} // namespace

template<>
struct std::hash<intcode::Coord>
{
  auto operator()(intcode::Coord const& c) const noexcept -> std::size_t {
    std::hash<std::int64_t> h;
    return h(c.x) ^ h(c.y);
  }
};

#endif