#ifndef PKE_MEMORY_HPP
#define PKE_MEMORY_HPP

#include "macros.hpp"

#include <cstring>
#include <cstdint>
#include <cstdlib>
#include <cstdio>
#include <cassert>

#define DEFAULT_BUCKET_SIZE 1UL << 27

struct MemBucket;

template<typename T, typename CT>
struct BucketContainer {
	uint64_t incrementer = 2;
	CT bucketCounter{0};
	CT itemCounter{0};
	T *buckets = nullptr;
};

void *Pke_New(std::size_t sz);
void *Pke_New(std::size_t sz, MemBucket *bkt);
void Pke_Delete(const void *ptr, std::size_t sz);
void Pke_Delete(const void *ptr, std::size_t sz, MemBucket *bkt);

MemBucket *Pke_BeginTransientBucket(int64_t sz = DEFAULT_BUCKET_SIZE); // 256MB
void Pke_EndTransientBucket(MemBucket *bkt);
void Pke_MemoryFlush();

template <typename T>
inline T *Pke_New() {
	return reinterpret_cast<T *>(Pke_New(sizeof(T)));
}
template <typename T>
inline T *Pke_New(long count) {
	return reinterpret_cast<T *>(Pke_New(sizeof(T) * count));
}
template <typename T>
inline void Pke_Delete(const void *ptr) {
	return Pke_Delete(ptr, sizeof(T));
}
template <typename T>
inline void Pke_Delete(const void *ptr, long count) {
	return Pke_Delete(ptr, sizeof(T) * count);
}


template <typename T, typename CT>
void Buckets_Init(BucketContainer<T, CT> &bktContainer) {
	assert(bktContainer.buckets == nullptr && "bucket container already initialized");
	bktContainer.buckets = Pke_New<T>(bktContainer.incrementer);
}

uint64_t Buckets_NewHandle(std::size_t bucketBytes, uint64_t bucketItemCount, uint64_t &bucketIncrementer, uint64_t &bucketCounter, uint64_t &itemCounter, void*& buckets);

template <typename T> inline uint64_t Buckets_NewHandle(uint64_t bucketItemCount, uint64_t &bucketIncrementer, uint64_t &bucketCounter, uint64_t &itemCounter, T*& buckets) {
	void *ptr = reinterpret_cast<void *>(buckets);
	uint64_t handle = Buckets_NewHandle(sizeof(T), bucketItemCount, bucketIncrementer, bucketCounter, itemCounter, ptr);
	buckets = reinterpret_cast<T *>(ptr);
	return handle;
}

template <typename T, typename CT>
inline CT Buckets_NewHandle(uint64_t maxBucketItemCount, BucketContainer<T, CT> &bktContainer) {
	return Buckets_NewHandle(maxBucketItemCount, bktContainer.incrementer, bktContainer.bucketCounter, bktContainer.itemCounter, bktContainer.buckets);
}

static inline constexpr uint64_t Buckets_GetBucketIndex(uint64_t handle) {
	return handle & 0x00000000FFFFFFFF;
}

static inline constexpr uint64_t Buckets_GetItemIndex(uint64_t handle) {
	return handle >> 32;
}

#endif /* PKE_MEMORY_HPP */