#ifndef VOXEL_TERRAIN_H
#define VOXEL_TERRAIN_H

#include <scene/main/node.h>
#include "voxel_map.h"
#include "voxel_mesher.h"

// Infinite static terrain made of voxels.
// It is loaded around VoxelTerrainStreamers.
class VoxelTerrain : public Node /*, public IVoxelMapObserver*/ {
    OBJ_TYPE(VoxelTerrain, Node)

    // Parameters
    int _min_y; // In blocks, not voxels
    int _max_y;

    // Voxel storage
    Ref<VoxelMap> _map;

    Vector<Vector3i> _block_update_queue;
    Ref<VoxelMesher> _mesher;

public:
    VoxelTerrain();

    void force_load_blocks(Vector3i center, Vector3i extents);

    int get_block_update_count();

    Ref<VoxelMesher> get_mesher() { return _mesher; }

protected:
    void _notification(int p_what);
    void _process();

    void update_blocks();
    void update_block_mesh(Vector3i block_pos);

    // Observer events
    //void block_removed(VoxelBlock & block);

    static void _bind_methods();

    // Convenience
    Vector3 _voxel_to_block_binding(Vector3 pos) { return Vector3i(VoxelMap::voxel_to_block(pos)).to_vec3(); }
    Vector3 _block_to_voxel_binding(Vector3 pos) { return Vector3i(VoxelMap::block_to_voxel(pos)).to_vec3(); }
    void _force_load_blocks_binding(Vector3 center, Vector3 extents) { force_load_blocks(center, extents); }

};

#endif // VOXEL_TERRAIN_H