#pragma once

#include <vector>

#include "Utility/G3DCore.hpp"

#include "Utility/UintSet.hpp"

#include "boost/cstdint.hpp"
#include "Utility/ClusterCellIterator.hpp"

#include "boost/unordered_map.hpp"

namespace Aya
{

// these constants visible for testing
const int kXZ_CHUNK_SIZE_AS_BITSHIFT = 5;
const int kXZ_CHUNK_SIZE_AS_BITMASK = 0x1f;
const int kY_CHUNK_SIZE_AS_BITSHIFT = 4;
const int kY_CHUNK_SIZE_AS_BITMASK = 0x0f;

namespace Network
{

typedef Vector3int16 ClusterCellUpdate;
typedef unsigned int ChunkIndex;


struct ClusterUpdateBuffer
{

private:
    typedef boost::unordered_map<SpatialRegion::Id, UintSet, SpatialRegion::Id::boost_compatible_hash_value> BitSetUpdateMap;
    BitSetUpdateMap::iterator lastFound;
    BitSetUpdateMap bitSetUpdates;

    size_t internalSize;

public:
    static void computeUintRepresentingLocationInChunk(const ClusterCellUpdate& update, unsigned int* out);
    static void computeGlobalLocationFromUintRepresentation(const unsigned int& info, const Vector3int16& baseCellOffset, ClusterCellUpdate* out);

    ClusterUpdateBuffer();

    size_t size() const;

    void push(const ClusterCellUpdate& inputData);

    bool chk(const ClusterCellUpdate& test);

    void pop(ClusterCellUpdate* out);

    static inline void nextCellInIterationOrder(const Vector3int16& cellpos, Vector3int16* out)
    {
        ClusterChunksIterator::nextCellInIterationOrder(cellpos, out);
    }
};

} // namespace Network

} // namespace Aya