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#pragma once
#include "tile.hpp"
#include "tile-iterator.hpp"
#include "scenery.hpp"
#include <type_traits>
#include <array>
#include <bitset>
#include <Magnum/GL/Mesh.h>

namespace floormat {

struct anim_atlas;

struct chunk final
{
    friend struct tile_ref;
    friend struct pass_mode_ref;

    tile_ref operator[](std::size_t idx) noexcept;
    tile_proto operator[](std::size_t idx) const noexcept;
    tile_ref operator[](local_coords xy) noexcept;
    tile_proto operator[](local_coords xy) const noexcept;

    using iterator = tile_iterator;
    using const_iterator = tile_const_iterator;

    iterator begin() noexcept;
    iterator end() noexcept;
    const_iterator cbegin() const noexcept;
    const_iterator cend() const noexcept;
    const_iterator begin() const noexcept;
    const_iterator end() const noexcept;

    bool empty(bool force = false) const noexcept;

    chunk() noexcept;
    chunk(const chunk&) = delete;
    chunk& operator=(const chunk&) = delete;
    chunk(chunk&&) noexcept;
    chunk& operator=(chunk&&) noexcept;

    void mark_modified() noexcept;
    bool is_modified() const noexcept;

    struct mesh_tuple { GL::Mesh& mesh; const std::array<std::uint8_t, TILE_COUNT>& ids; }; // NOLINT

    mesh_tuple ensure_ground_mesh() noexcept;
    tile_atlas* ground_atlas_at(std::size_t i) const noexcept;

private:
    std::array<std::shared_ptr<tile_atlas>, TILE_COUNT> _ground_atlases, _wall_north_atlases, _wall_west_atlases;
    std::array<std::shared_ptr<anim_atlas>, TILE_COUNT> _scenery_atlases;
    std::array<scenery, TILE_COUNT> _scenery_variants = {};
    std::array<variant_t, TILE_COUNT> _ground_variants = {}, _wall_north_variants = {}, _wall_west_variants = {};
    std::bitset<TILE_COUNT*2> _passability = {};
    std::array<std::uint8_t, TILE_COUNT> ground_indexes = {};
    GL::Mesh ground_mesh{NoCreate};
    mutable std::uint8_t _maybe_empty     : 1 = true,
                         _ground_modified : 1 = true;
};

} // namespace floormat