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#pragma once
#include "compat/assert.hpp"
#include "tile-defs.hpp"
#include <type_traits>
namespace Magnum::Math {
template<class T> class Vector2;
template<class T> class Vector3;
} // namespace Magnum::Math
namespace floormat {
struct local_coords final {
uint8_t x : 4 = 0, y : 4 = 0;
explicit constexpr local_coords(size_t idx) noexcept;
constexpr local_coords() noexcept = default;
constexpr local_coords(uint8_t x, uint8_t y) noexcept : x{x}, y{y} {}
template<typename T> requires (std::is_integral_v<T> && sizeof(T) <= sizeof(size_t))
constexpr local_coords(T x, T y) noexcept;
template<typename T> requires requires (const Math::Vector2<T>& vec) { local_coords{vec.x(), vec.y()}; }
constexpr local_coords(Math::Vector2<T> vec) noexcept : local_coords{vec.x(), vec.y()} {}
constexpr uint8_t to_index() const noexcept { return y*TILE_MAX_DIM + x; }
constexpr bool operator==(const local_coords&) const noexcept = default;
template<typename T> explicit constexpr operator Math::Vector2<T>() const noexcept { return Math::Vector2<T>(T(x), T(y)); }
template<typename T> explicit constexpr operator Math::Vector3<T>() const noexcept { return Math::Vector3<T>(T(x), T(y), T(0)); }
};
constexpr local_coords::local_coords(size_t index) noexcept :
x{(uint8_t)(index % TILE_MAX_DIM)},
y{(uint8_t)(index / TILE_MAX_DIM)}
{
fm_assert(index < TILE_COUNT);
}
template<typename T>
requires (std::is_integral_v<T> && sizeof(T) <= sizeof(size_t))
constexpr local_coords::local_coords(T x, T y) noexcept
: x{(uint8_t)x}, y{(uint8_t)y}
{
fm_assert((size_t)x < TILE_MAX_DIM && (size_t)y < TILE_MAX_DIM);
}
} // namespace floormat
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