#include "Generator.hpp"
#include "../Math/Noise.hpp"

namespace MC::World {

Chunk Generator::generate(int64_t chunk_x, int64_t chunk_y) {
    Chunk chunk(chunk_x, chunk_y);

    uint8_t extent = 60;
    uint8_t base = 4;

    for (int x = 0; x < CHUNK_WIDTH; x++) {
        for (int z = 0; z < CHUNK_WIDTH; z++) {
            float noise = Math::noise2d(
                {(float)chunk_x * CHUNK_WIDTH + x, (float)chunk_y * CHUNK_WIDTH + z}
            ) * extent + base;

            uint height = std::round(noise);

            for (int y = 0; y < CHUNK_HEIGHT; y++) {
                BlockType type = BlockType::Air;
                if (y < height) {
                    type = BlockType::Dirt;
                } else if (y == height) {
                    type = BlockType::Grass;
                }

                chunk.set(x, y, z, type);
            }
        }
    }

    return chunk;
}

}