World Management

pub trait SimpleWorld: BlockAccessor + Send + Sync {
    fn set_block_state(
        self: Arc<Self>,
        position: &BlockPos,
        block_state_id: BlockStateId,
        flags: BlockFlags,
    ) -> WorldFuture<'_, BlockStateId>;
    
    fn update_neighbors(
        self: Arc<Self>,
        block_pos: &BlockPos,
        except: Option<BlockDirection>,
    ) -> WorldFuture<'_, ()>;
    
    fn spawn_from_type(
        self: Arc<Self>,
        entity_type: &'static EntityType,
        position: Vector3<f64>,
    ) -> WorldFuture<'static, ()>;
}

pub struct BlockFlags: u32 {
    const NOTIFY_NEIGHBORS = 0b000_0000_0001;
    const NOTIFY_LISTENERS = 0b000_0000_0010;
    const NOTIFY_ALL = 0b000_0000_0011;
    const FORCE_STATE = 0b000_0000_0100;
    const SKIP_DROPS = 0b000_0000_1000;
    const MOVED = 0b000_0001_0000;
    const SKIP_REDSTONE_WIRE_STATE_REPLACEMENT = 0b000_0010_0000;
    const SKIP_BLOCK_ENTITY_REPLACED_CALLBACK = 0b000_0100_0000;
    const SKIP_BLOCK_ADDED_CALLBACK = 0b000_1000_0000;
}

pub struct Level {
    pub seed: Seed,
    pub block_registry: Arc<dyn BlockRegistryExt>,
    pub level_folder: LevelFolder,
    pub lighting_config: LightingEngineConfig,
    
    pub loaded_chunks: Arc<DashMap<Vector2<i32>, SyncChunk>>,
    loaded_entity_chunks: Arc<DashMap<Vector2<i32>, SyncEntityChunk>>,
    pub chunk_loading: Mutex<ChunkLoading>,
    
    pub chunk_saver: Arc<dyn FileIO<Data = SyncChunk>>,
    pub world_gen: Arc<VanillaGenerator>,
    pub light_engine: DynamicLightEngine,
}

pub type SyncChunk = Arc<ChunkData>;
pub type SyncEntityChunk = Arc<ChunkEntityData>;

pub struct ChunkLoading {
    // Internal state for tracking chunk load requests
}

pub enum ChunkState {
    Empty,
    Loading,
    Loaded,
    Generating,
    Generated,
    Unloading,
}

pub fn get_world_gen(seed: Seed, dimension: Dimension) -> Box<VanillaGenerator> {
    Box::new(VanillaGenerator::new(seed, dimension))
}

pub mod section_coords {
    pub const fn block_to_section(coord: i32) -> i32 {
        coord >> 4  // Divide by 16
    }
    
    pub const fn section_to_block(coord: i32) -> i32 {
        coord << 4  // Multiply by 16
    }
}

pub mod biome_coords {
    pub const fn from_block(coord: i32) -> i32 {
        coord >> 2  // Divide by 4
    }
    
    pub const fn to_block(coord: i32) -> i32 {
        coord << 2  // Multiply by 4
    }
}

pub struct DynamicLightEngine {
    // Runtime lighting calculations
}

pub trait BlockAccessor: Send + Sync {
    fn get_block<'a>(
        &'a self,
        position: &'a BlockPos,
    ) -> Pin<Box<dyn Future<Output = &'static Block> + Send + 'a>>;
    
    fn get_block_state<'a>(
        &'a self,
        position: &'a BlockPos,
    ) -> Pin<Box<dyn Future<Output = &'static BlockState> + Send + 'a>>;
    
    fn get_block_state_id<'a>(
        &'a self,
        position: &'a BlockPos,
    ) -> Pin<Box<dyn Future<Output = BlockStateId> + Send + 'a>>;
}

pub struct Level {
    pub should_save: AtomicBool,
    pub autosave_ticks: u64,
}