extern "C" {
#include "sph/sph_blake.h"
#include "sph/sph_groestl.h"
#include "sph/sph_skein.h"
#include "sph/sph_keccak.h"
#include "lyra2/Lyra2.h"
}

#include "miner.h"
#include "cuda_helper.h"

static uint64_t* d_hash[MAX_GPUS];
//static uint64_t* d_matrix[MAX_GPUS];

extern void blake256_cpu_init(int thr_id, uint32_t threads);
extern void blake256_cpu_hash_80(const int thr_id, const uint32_t threads, const uint32_t startNonce, uint64_t *Hash, int order);
extern void blake256_cpu_setBlock_80(uint32_t *pdata);
extern void keccak256_cpu_hash_32(int thr_id, uint32_t threads, uint32_t startNonce, uint64_t *d_outputHash, int order);
extern void keccak256_cpu_init(int thr_id, uint32_t threads);
extern void keccak256_cpu_free(int thr_id);
extern void skein256_cpu_hash_32(int thr_id, uint32_t threads, uint32_t startNonce, uint64_t *d_outputHash, int order);
extern void skein256_cpu_init(int thr_id, uint32_t threads);

//extern void lyra2_cpu_init(int thr_id, uint32_t threads, uint64_t *hash);
extern void lyra2_cpu_hash_32(int thr_id, uint32_t threads, uint32_t startNonce, uint64_t *d_outputHash, int order);

extern void groestl256_cpu_init(int thr_id, uint32_t threads);
extern void groestl256_cpu_free(int thr_id);
extern void groestl256_setTarget(const void *ptarget);
extern uint32_t groestl256_cpu_hash_32(int thr_id, uint32_t threads, uint32_t startNounce, uint64_t *d_outputHash, int order);
extern uint32_t groestl256_getSecNonce(int thr_id, int num);

#ifdef _DEBUG
#define TRACE(algo) { \
	if (max_nonce == 1 && pdata[19] <= 1) { \
		uint32_t* debugbuf = NULL; \
		cudaMallocHost(&debugbuf, 8*sizeof(uint32_t)); \
		cudaMemcpy(debugbuf, d_hash[thr_id], 8*sizeof(uint32_t), cudaMemcpyDeviceToHost); \
		printf("lyra %s %08x %08x %08x %08x...\n", algo, swab32(debugbuf[0]), swab32(debugbuf[1]), \
			swab32(debugbuf[2]), swab32(debugbuf[3])); \
		cudaFreeHost(debugbuf); \
	} \
}
#else
#define TRACE(algo) {}
#endif

extern "C" void lyra2re_hash(void *state, const void *input)
{
	uint32_t hashA[8], hashB[8];

	sph_blake256_context     ctx_blake;
	sph_keccak256_context    ctx_keccak;
	sph_skein256_context     ctx_skein;
	sph_groestl256_context   ctx_groestl;

	sph_blake256_set_rounds(14);

	sph_blake256_init(&ctx_blake);
	sph_blake256(&ctx_blake, input, 80);
	sph_blake256_close(&ctx_blake, hashA);

	sph_keccak256_init(&ctx_keccak);
	sph_keccak256(&ctx_keccak, hashA, 32);
	sph_keccak256_close(&ctx_keccak, hashB);

	LYRA2(hashA, 32, hashB, 32, hashB, 32, 1, 8, 8);

	sph_skein256_init(&ctx_skein);
	sph_skein256(&ctx_skein, hashA, 32);
	sph_skein256_close(&ctx_skein, hashB);

	sph_groestl256_init(&ctx_groestl);
	sph_groestl256(&ctx_groestl, hashB, 32);
	sph_groestl256_close(&ctx_groestl, hashA);

	memcpy(state, hashA, 32);
}

static bool init[MAX_GPUS] = { 0 };

extern "C" int scanhash_lyra2(int thr_id, struct work* work, uint32_t max_nonce, unsigned long *hashes_done)
{
	uint32_t *pdata = work->data;
	uint32_t *ptarget = work->target;
	const uint32_t first_nonce = pdata[19];
	int intensity = (device_sm[device_map[thr_id]] >= 500 && !is_windows()) ? 18 : 17;
	uint32_t throughput = device_intensity(thr_id, __func__, 1U << intensity); // 18=256*256*4;
	throughput = min(throughput, max_nonce - first_nonce);

	if (opt_benchmark)
		ptarget[7] = 0x00ff;

	if (!init[thr_id])
	{
		cudaSetDevice(device_map[thr_id]);
		cudaGetLastError(); // reset last error

		blake256_cpu_init(thr_id, throughput);
		keccak256_cpu_init(thr_id,throughput);
		skein256_cpu_init(thr_id, throughput);
		groestl256_cpu_init(thr_id, throughput);

		// DMatrix
//		cudaMalloc(&d_matrix[thr_id], (size_t)16 * 8 * 8 * sizeof(uint64_t) * throughput);
//		lyra2_cpu_init(thr_id, throughput, d_matrix[thr_id]);

		CUDA_SAFE_CALL(cudaMalloc(&d_hash[thr_id], (size_t)32 * throughput));

		init[thr_id] = true;
	}

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

	blake256_cpu_setBlock_80(pdata);
	groestl256_setTarget(ptarget);

	do {
		int order = 0;
		uint32_t foundNonce;

		*hashes_done = pdata[19] - first_nonce + throughput;

		blake256_cpu_hash_80(thr_id, throughput, pdata[19], d_hash[thr_id], order++);
		keccak256_cpu_hash_32(thr_id, throughput, pdata[19], d_hash[thr_id], order++);
		lyra2_cpu_hash_32(thr_id, throughput, pdata[19], d_hash[thr_id], order++);
		skein256_cpu_hash_32(thr_id, throughput, pdata[19], d_hash[thr_id], order++);
		TRACE("S")

		foundNonce = groestl256_cpu_hash_32(thr_id, throughput, pdata[19], d_hash[thr_id], order++);
		if (foundNonce != UINT32_MAX)
		{
			uint32_t _ALIGN(64) vhash64[8];

			be32enc(&endiandata[19], foundNonce);
			lyra2re_hash(vhash64, endiandata);

			if (vhash64[7] <= ptarget[7] && fulltest(vhash64, ptarget)) {
				int res = 1;
				uint32_t secNonce = groestl256_getSecNonce(thr_id, 1);
				work_set_target_ratio(work, vhash64);
				if (secNonce != UINT32_MAX)
				{
					be32enc(&endiandata[19], secNonce);
					lyra2re_hash(vhash64, endiandata);
					if (vhash64[7] <= ptarget[7] && fulltest(vhash64, ptarget)) {
						if (opt_debug)
							applog(LOG_BLUE, "GPU #%d: found second nonce %08x", device_map[thr_id], secNonce);
						if (bn_hash_target_ratio(vhash64, ptarget) > work->shareratio)
							work_set_target_ratio(work, vhash64);
						pdata[21] = secNonce;
						res++;
					}
				}
				pdata[19] = foundNonce;
				return res;
			} else {
				applog(LOG_WARNING, "GPU #%d: result for %08x does not validate on CPU!", device_map[thr_id], foundNonce);
			}
		}

		pdata[19] += throughput;

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

	return 0;
}

// cleanup
extern "C" void free_lyra2(int thr_id)
{
	if (!init[thr_id])
		return;

	cudaSetDevice(device_map[thr_id]);

	cudaFree(d_hash[thr_id]);
	//cudaFree(d_matrix[thr_id]);

	keccak256_cpu_free(thr_id);
	groestl256_cpu_free(thr_id);

	init[thr_id] = false;

	cudaDeviceSynchronize();
}