#pragma once

#include <cstdint>
#include <optional>
#include "BlockType.hpp"
#include "../GFX/Mesh.hpp"
#include "BlockSide.hpp"
#include "../GFX/Binder.hpp"

namespace MC::World {

class Chunk {
public:
    static constexpr const uint32_t Width = 16;
    static constexpr const uint32_t Height = 128;

    Chunk(int64_t x, int64_t y)
        : m_blocks{Chunk::Width * Chunk::Height * Chunk::Width, {BlockType::Air}},
        m_position{(float)x * Chunk::Width, 0.0f, (float)y * Chunk::Width} {};

    struct BlockData {
        BlockType type;
    };

    void set(uint32_t x, uint32_t y, uint32_t z, BlockData type);
    BlockData get(uint32_t x, uint32_t y, uint32_t z);

    Vector<3> position();
    GFX::Mesh mesh();
private:
    bool is_face_visible(uint32_t x, uint32_t y, uint32_t z, BlockSide side);

    static std::array<Vector<2>, 4> face_tex_coords(BlockType type, BlockSide side);
    static std::array<Vector<3>, 4> face_normals(BlockSide side);

    static uint64_t pos(uint32_t x, uint32_t y, uint32_t z);

    Vector<3> m_position;
    std::vector<BlockData> m_blocks;
};

}