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#pragma once
#include "compat/defs.hpp"
#include "tile-image.hpp"

namespace floormat {

struct chunk;

// zero is the default, see bitset in chunk.hpp
enum pass_mode : std::uint8_t { pass_shoot_through, pass_ok, pass_blocked, };

struct pass_mode_ref final
{
    pass_mode_ref(chunk& c, std::uint8_t i) noexcept;
    pass_mode_ref& operator=(pass_mode x) noexcept;
    pass_mode_ref& operator=(const pass_mode_ref& x) noexcept;
    operator pass_mode() const noexcept;

private:
    chunk* _chunk;
    std::uint8_t i;
};

struct tile_proto final
{
    std::shared_ptr<tile_atlas> ground_atlas, wall_north_atlas, wall_west_atlas;
    variant_t ground_variant = 0, wall_north_variant = 0, wall_west_variant = 0;
    pass_mode pass_mode = pass_mode::pass_shoot_through;

    tile_image_proto ground_image() const noexcept;
    tile_image_proto wall_north_image() const noexcept;
    tile_image_proto wall_west_image() const noexcept;

    friend bool operator==(const tile_proto& a, const tile_proto& b) noexcept;
};

struct tile_ref final
{
    tile_ref(struct chunk& c, std::uint8_t i) noexcept;

    tile_image_ref ground() noexcept;
    tile_image_ref wall_north() noexcept;
    tile_image_ref wall_west() noexcept;

    tile_image_proto ground() const noexcept;
    tile_image_proto wall_north() const noexcept;
    tile_image_proto wall_west() const noexcept;

    std::shared_ptr<tile_atlas> ground_atlas() noexcept;
    std::shared_ptr<tile_atlas> wall_north_atlas() noexcept;
    std::shared_ptr<tile_atlas> wall_west_atlas() noexcept;

    std::shared_ptr<const tile_atlas> ground_atlas() const noexcept;
    std::shared_ptr<const tile_atlas> wall_north_atlas() const noexcept;
    std::shared_ptr<const tile_atlas> wall_west_atlas() const noexcept;

    pass_mode_ref pass_mode() noexcept;
    enum pass_mode pass_mode() const noexcept;

    explicit operator tile_proto() const noexcept;

    struct chunk& chunk() noexcept { return *_chunk; }
    const struct chunk& chunk() const noexcept { return *_chunk; }
    std::size_t index() const noexcept { return i; }

    friend bool operator==(const tile_ref& a, const tile_ref& b) noexcept;

private:
    struct chunk* _chunk;
    std::uint8_t i;
};

} //namespace floormat