#include "voxel_generator.h"
#include "../constants/voxel_string_names.h"
#include "../storage/voxel_buffer_gd.h"

namespace zylann::voxel {

VoxelGenerator::VoxelGenerator() {}

VoxelGenerator::Result VoxelGenerator::generate_block(VoxelQueryData &input) {
	return Result();
}

int VoxelGenerator::get_used_channels_mask() const {
	return 0;
}

VoxelSingleValue VoxelGenerator::generate_single(Vector3i pos, unsigned int channel) {
	// Default slow implementation
	// TODO Optimize: a small part of the slowness is caused by the allocator.
	// It is not a good use of `VoxelMemoryPool` for such a small size called so often.
	// Instead it would be faster if it was a thread-local using the default allocator.
	VoxelBufferInternal buffer;
	buffer.create(1, 1, 1);
	VoxelQueryData q{ buffer, pos, 0 };
	generate_block(q);
	VoxelSingleValue v;
	if (channel == VoxelBufferInternal::CHANNEL_SDF) {
		v.f = buffer.get_voxel_f(0, 0, 0, channel);
	} else {
		v.i = buffer.get_voxel(0, 0, 0, channel);
	}
	return v;
}

void VoxelGenerator::_b_generate_block(Ref<gd::VoxelBuffer> out_buffer, Vector3 origin_in_voxels, int lod) {
	ERR_FAIL_COND(lod < 0);
	ERR_FAIL_COND(lod >= int(constants::MAX_LOD));
	ERR_FAIL_COND(out_buffer.is_null());
	VoxelQueryData q = { out_buffer->get_buffer(), origin_in_voxels, uint8_t(lod) };
	generate_block(q);
}

void VoxelGenerator::_bind_methods() {
	ClassDB::bind_method(
			D_METHOD("generate_block", "out_buffer", "origin_in_voxels", "lod"), &VoxelGenerator::_b_generate_block);
}

} // namespace zylann::voxel