extern "C"
{
#include "sph/sph_blake.h"
#include "sph/sph_groestl.h"
#include "sph/sph_skein.h"
#include "sph/sph_jh.h"
#include "sph/sph_keccak.h"
#include "miner.h"
}

#include <stdint.h>

// aus cpu-miner.c
extern int device_map[8];

// Speicher für Input/Output der verketteten Hashfunktionen
static uint32_t *d_hash[8];

extern void quark_blake512_cpu_init(int thr_id, int threads);
extern void quark_blake512_cpu_setBlock_80(void *pdata);
extern void quark_blake512_cpu_hash_80(int thr_id, int threads, uint32_t startNounce, uint32_t *d_hash, int order);

extern void quark_groestl512_cpu_init(int thr_id, int threads);
extern void quark_groestl512_cpu_hash_64(int thr_id, int threads, uint32_t startNounce, uint32_t *d_nonceVector, uint32_t *d_hash, int order);

extern void quark_jh512_cpu_init(int thr_id, int threads);
extern void quark_jh512_cpu_hash_64(int thr_id, int threads, uint32_t startNounce, uint32_t *d_nonceVector, uint32_t *d_hash, int order);

extern void quark_keccak512_cpu_init(int thr_id, int threads);
extern void quark_keccak512_cpu_hash_64(int thr_id, int threads, uint32_t startNounce, uint32_t *d_nonceVector, uint32_t *d_hash, int order);

extern void quark_skein512_cpu_init(int thr_id, int threads);
extern void quark_skein512_cpu_hash_64(int thr_id, int threads, uint32_t startNounce, uint32_t *d_nonceVector, uint32_t *d_hash, int order);

extern void quark_check_cpu_init(int thr_id, int threads);
extern void quark_check_cpu_setTarget(const void *ptarget);
extern uint32_t quark_check_cpu_hash_64(int thr_id, int threads, uint32_t startNounce, uint32_t *d_nonceVector, uint32_t *d_inputHash, int order);

// Original nist5hash Funktion aus einem miner Quelltext
inline void nist5hash(void *state, const void *input)
{
    sph_blake512_context ctx_blake;
    sph_groestl512_context ctx_groestl;
    sph_jh512_context ctx_jh;
    sph_keccak512_context ctx_keccak;
    sph_skein512_context ctx_skein;
    
    unsigned char hash[64];

    sph_blake512_init(&ctx_blake);
    // ZBLAKE;
    sph_blake512 (&ctx_blake, input, 80);
    sph_blake512_close(&ctx_blake, (void*) hash);
    
    sph_groestl512_init(&ctx_groestl);
    // ZGROESTL;
    sph_groestl512 (&ctx_groestl, (const void*) hash, 64);
    sph_groestl512_close(&ctx_groestl, (void*) hash);

    sph_jh512_init(&ctx_jh);
    // ZJH;
    sph_jh512 (&ctx_jh, (const void*) hash, 64);
    sph_jh512_close(&ctx_jh, (void*) hash);

    sph_keccak512_init(&ctx_keccak);
    // ZKECCAK;
    sph_keccak512 (&ctx_keccak, (const void*) hash, 64);
    sph_keccak512_close(&ctx_keccak, (void*) hash);

    sph_skein512_init(&ctx_skein);
    // ZSKEIN;
    sph_skein512 (&ctx_skein, (const void*) hash, 64);
    sph_skein512_close(&ctx_skein, (void*) hash);

    memcpy(state, hash, 32);
}


extern bool opt_benchmark;

extern "C" int scanhash_nist5(int thr_id, uint32_t *pdata,
    const uint32_t *ptarget, uint32_t max_nonce,
    unsigned long *hashes_done)
{
	const uint32_t first_nonce = pdata[19];

	// TODO: entfernen für eine Release! Ist nur zum Testen!
	if (opt_benchmark)
		((uint32_t*)ptarget)[7] = 0x0000ff;

	const uint32_t Htarg = ptarget[7];

	const int throughput = 256*4096; // 100;

	static bool init[8] = {0,0,0,0,0,0,0,0};
	if (!init[thr_id])
	{
		cudaSetDevice(device_map[thr_id]);

		// Konstanten kopieren, Speicher belegen
		cudaMalloc(&d_hash[thr_id], 16 * sizeof(uint32_t) * throughput);
		quark_blake512_cpu_init(thr_id, throughput);
		quark_groestl512_cpu_init(thr_id, throughput);
		quark_jh512_cpu_init(thr_id, throughput);
		quark_keccak512_cpu_init(thr_id, throughput);
		quark_skein512_cpu_init(thr_id, throughput);
		quark_check_cpu_init(thr_id, throughput);
		init[thr_id] = true;
	}

	uint32_t endiandata[20];
	for (int k=0; k < 20; k++)
		be32enc(&endiandata[k], ((uint32_t*)pdata)[k]);

	quark_blake512_cpu_setBlock_80((void*)endiandata);
	quark_check_cpu_setTarget(ptarget);

	do {
		int order = 0;

		// erstes Blake512 Hash mit CUDA
		quark_blake512_cpu_hash_80(thr_id, throughput, pdata[19], d_hash[thr_id], order++);

		// das ist der unbedingte Branch für Groestl512
		quark_groestl512_cpu_hash_64(thr_id, throughput, pdata[19], NULL, d_hash[thr_id], order++);

		// das ist der unbedingte Branch für JH512
		quark_jh512_cpu_hash_64(thr_id, throughput, pdata[19], NULL, d_hash[thr_id], order++);

		// das ist der unbedingte Branch für Keccak512
		quark_keccak512_cpu_hash_64(thr_id, throughput, pdata[19], NULL, d_hash[thr_id], order++);

		// das ist der unbedingte Branch für Skein512
		quark_skein512_cpu_hash_64(thr_id, throughput, pdata[19], NULL, d_hash[thr_id], order++);

		// Scan nach Gewinner Hashes auf der GPU
		uint32_t foundNonce = quark_check_cpu_hash_64(thr_id, throughput, pdata[19], NULL, d_hash[thr_id], order++);
		if  (foundNonce != 0xffffffff)
		{
			uint32_t vhash64[8];
			be32enc(&endiandata[19], foundNonce);
			nist5hash(vhash64, endiandata);

			if ((vhash64[7]<=Htarg) && fulltest(vhash64, ptarget)) {

				pdata[19] = foundNonce;
				*hashes_done = foundNonce - first_nonce + 1;
				return 1;
			} else {
				applog(LOG_INFO, "GPU #%d: result for nonce $%08X does not validate on CPU!", thr_id, foundNonce);
			}
		}

		pdata[19] += throughput;

	} while (pdata[19] < max_nonce && !work_restart[thr_id].restart);

	*hashes_done = pdata[19] - first_nonce + 1;
	return 0;
}