#pragma once

#include <forstio/codec/schema.h>

namespace kel {
namespace lbm {
namespace schema {
using namespace saw::schema;

template<typename T, uint64_t D, uint64_t Q>
struct Descriptor {};

template<typename T, uint64_t D, uint64_t Q, uint64_t SC, uint64_t DC, uint64_t QC>
using CellType = FixedArray<T,SC+D*DC+Q*QC>;

/**
 * T... is restricted to Member schemas
 */
template<typename... CellT> 
using CellData = Struct<
	CellT...
>;

/**
 * T is an array of CellData
 */
template<typename T, size_t D>
using Lattice = Array<T, D>;
}

template<typename T>
class df_info{};

template<typename T>
class df_info<Descriptor<T, 2, 5>> {
	static constexpr std::array<std::array<int32_t, 2>, 5> directions = {
		{ 0, 0},
		{-1, 0},
		{ 0,-1},
		{ 0, 1},
		{ 1, 0}
	};

	static constexpr std::array<std::ratio<int32_t>,5> weights = {
		{1,3},
		{1,6},
		{1,6},
		{1,6},
		{1,6}
	};

	static constexpr std::ratio<int32_t> cs2 = {1,3};
};
}
}