#include "chunk.hpp"

namespace floormat {

bool chunk::empty(bool force) const noexcept
{
    if (!force && !_maybe_empty)
        return false;

    for (std::size_t i = 0; i < TILE_COUNT; i++)
    {
        if (_ground_atlases[i] || _wall_north_atlases[i] || _wall_west_atlases[i])
        {
            _maybe_empty = false;
            return false;
        }
    }

    return true;
}

tile_ref chunk::operator[](std::size_t idx) noexcept { return { *this, std::uint8_t(idx) }; }
tile_proto chunk::operator[](std::size_t idx) const noexcept { return tile_proto(tile_ref { *const_cast<chunk*>(this), std::uint8_t(idx) }); }
tile_ref chunk::operator[](local_coords xy) noexcept { return operator[](xy.to_index()); }
tile_proto chunk::operator[](local_coords xy) const noexcept { return operator[](xy.to_index()); }

auto chunk::begin() noexcept -> iterator { return iterator { *this, 0 }; }
auto chunk::end() noexcept -> iterator { return iterator { *this, TILE_COUNT }; }
auto chunk::cbegin() const noexcept -> const_iterator { return const_iterator { *this, 0 }; }
auto chunk::cend() const noexcept -> const_iterator { return const_iterator { *this, TILE_COUNT }; }
auto chunk::begin() const noexcept -> const_iterator { return cbegin(); }
auto chunk::end() const noexcept -> const_iterator { return cend(); }

chunk::chunk(chunk&&) noexcept = default;
chunk& chunk::operator=(chunk&&) noexcept = default;

} // namespace floormat