#pragma once

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

namespace MC::World {

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

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

    struct BlockData {
        BlockType type;
    };

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

    struct Details {
        Matrix<Width, Width> landmass_values{};
        Matrix<Width, Width> hill_values{};
        Matrix<Width, Width, BiomeType> biome_values{};
    };
    void set_details(const Details& details) { m_details = details; }
    Details& details(){ return m_details; }

    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;

    Details m_details;
};

}