#include "miner.h"

#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <stdio.h>

#include "sha3/sph_blake.h"
#include "sha3/sph_bmw.h"
#include "sha3/sph_groestl.h"
#include "sha3/sph_jh.h"
#include "sha3/sph_keccak.h"
#include "sha3/sph_skein.h"
#include "sha3/sph_luffa.h"
#include "sha3/sph_cubehash.h"
#include "sha3/sph_shavite.h"
#include "sha3/sph_simd.h"
#include "sha3/sph_echo.h"


void x11_hash(char* output, const char* input)
{
    sph_blake512_context     ctx_blake;
    sph_bmw512_context       ctx_bmw;
    sph_groestl512_context   ctx_groestl;
    sph_skein512_context     ctx_skein;
    sph_jh512_context        ctx_jh;
    sph_keccak512_context    ctx_keccak;

    sph_luffa512_context		ctx_luffa1;
    sph_cubehash512_context		ctx_cubehash1;
    sph_shavite512_context		ctx_shavite1;
    sph_simd512_context		ctx_simd1;
    sph_echo512_context		ctx_echo1;

    //these uint512 in the c++ source of the client are backed by an array of uint32
    uint32_t hashA[16], hashB[16];	

    sph_blake512_init(&ctx_blake);
    sph_blake512 (&ctx_blake, input, 80);
    sph_blake512_close (&ctx_blake, hashA);

    sph_bmw512_init(&ctx_bmw);
    sph_bmw512 (&ctx_bmw, hashA, 64);
    sph_bmw512_close(&ctx_bmw, hashB);

    sph_groestl512_init(&ctx_groestl);
    sph_groestl512 (&ctx_groestl, hashB, 64);
    sph_groestl512_close(&ctx_groestl, hashA);

    sph_skein512_init(&ctx_skein);
    sph_skein512 (&ctx_skein, hashA, 64);
    sph_skein512_close (&ctx_skein, hashB);

    sph_jh512_init(&ctx_jh);
    sph_jh512 (&ctx_jh, hashB, 64);
    sph_jh512_close(&ctx_jh, hashA);

    sph_keccak512_init(&ctx_keccak);
    sph_keccak512 (&ctx_keccak, hashA, 64);
    sph_keccak512_close(&ctx_keccak, hashB);
	
    sph_luffa512_init (&ctx_luffa1);
    sph_luffa512 (&ctx_luffa1, hashB, 64);
    sph_luffa512_close (&ctx_luffa1, hashA);	
	
    sph_cubehash512_init (&ctx_cubehash1); 
    sph_cubehash512 (&ctx_cubehash1, hashA, 64);   
    sph_cubehash512_close(&ctx_cubehash1, hashB);  
	
    sph_shavite512_init (&ctx_shavite1);
    sph_shavite512 (&ctx_shavite1, hashB, 64);   
    sph_shavite512_close(&ctx_shavite1, hashA);  
	
    sph_simd512_init (&ctx_simd1); 
    sph_simd512 (&ctx_simd1, hashA, 64);   
    sph_simd512_close(&ctx_simd1, hashB); 
	
    sph_echo512_init (&ctx_echo1); 
    sph_echo512 (&ctx_echo1, hashB, 64);   
    sph_echo512_close(&ctx_echo1, hashA); 

    memcpy(output, hashA, 32);
}

int scanhash_x11(int thr_id, uint32_t *pdata, const uint32_t *ptarget,
	uint32_t max_nonce, uint64_t *hashes_done)
{
	uint32_t n = pdata[19] - 1;
	const uint32_t first_nonce = pdata[19];
	const uint32_t Htarg = ptarget[7];

	uint32_t hash64[8] __attribute__((aligned(32)));
	uint32_t endiandata[32];
	
	//char testdata[] = {"\x70\x00\x00\x00\x5d\x38\x5b\xa1\x14\xd0\x79\x97\x0b\x29\xa9\x41\x8f\xd0\x54\x9e\x7d\x68\xa9\x5c\x7f\x16\x86\x21\xa3\x14\x20\x10\x00\x00\x00\x00\x57\x85\x86\xd1\x49\xfd\x07\xb2\x2f\x3a\x8a\x34\x7c\x51\x6d\xe7\x05\x2f\x03\x4d\x2b\x76\xff\x68\xe0\xd6\xec\xff\x9b\x77\xa4\x54\x89\xe3\xfd\x51\x17\x32\x01\x1d\xf0\x73\x10\x00"};
	
	//we need bigendian data...
	//lessons learned: do NOT endianchange directly in pdata, this will all proof-of-works be considered as stale from minerd.... 
	int kk=0;
	for (; kk < 32; kk++)
	{
		be32enc(&endiandata[kk], ((uint32_t*)pdata)[kk]);
	};

//	if (opt_debug) 
//	{
//		applog(LOG_DEBUG, "Thr: %02d, firstN: %08x, maxN: %08x, ToDo: %d", thr_id, first_nonce, max_nonce, max_nonce-first_nonce);
//	}
	
	/* I'm to lazy to put the loop in an inline function... so dirty copy'n'paste.... */
	/* i know that i could set a variable, but i don't know how the compiler will optimize it, not that then the cpu needs to load the value *everytime* in a register */
	if (ptarget[7]==0) {
		do {
			pdata[19] = ++n;
			be32enc(&endiandata[19], n); 
			x11_hash((char*) hash64, (const char*) endiandata);
			if (((hash64[7]&0xFFFFFFFF)==0) && 
					fulltest(hash64, ptarget)) {
				*hashes_done = n - first_nonce + 1;
				return true;
			}
		} while (n < max_nonce && !work_restart[thr_id].restart);	
	} 
	else if (ptarget[7]<=0xF) 
	{
		do {
			pdata[19] = ++n;
			be32enc(&endiandata[19], n); 
			x11_hash((char*) hash64, (const char*) endiandata);
			if (((hash64[7]&0xFFFFFFF0)==0) && 
					fulltest(hash64, ptarget)) {
				*hashes_done = n - first_nonce + 1;
				return true;
			}
		} while (n < max_nonce && !work_restart[thr_id].restart);	
	} 
	else if (ptarget[7]<=0xFF) 
	{
		do {
			pdata[19] = ++n;
			be32enc(&endiandata[19], n); 
			x11_hash((char*) hash64, (const char*) endiandata);
			if (((hash64[7]&0xFFFFFF00)==0) && 
					fulltest(hash64, ptarget)) {
				*hashes_done = n - first_nonce + 1;
				return true;
			}
		} while (n < max_nonce && !work_restart[thr_id].restart);	
	} 
	else if (ptarget[7]<=0xFFF) 
	{
		do {
			pdata[19] = ++n;
			be32enc(&endiandata[19], n); 
			x11_hash((char*) hash64, (const char*) endiandata);
			if (((hash64[7]&0xFFFFF000)==0) && 
					fulltest(hash64, ptarget)) {
				*hashes_done = n - first_nonce + 1;
				return true;
			}
		} while (n < max_nonce && !work_restart[thr_id].restart);	

	} 
	else if (ptarget[7]<=0xFFFF) 
	{
		do {
			pdata[19] = ++n;
			be32enc(&endiandata[19], n); 
			x11_hash((char*) hash64, (const char*) endiandata);
			if (((hash64[7]&0xFFFF0000)==0) && 
					fulltest(hash64, ptarget)) {
				*hashes_done = n - first_nonce + 1;
				return true;
			}
		} while (n < max_nonce && !work_restart[thr_id].restart);	

	} 
	else 
	{
		do {
			pdata[19] = ++n;
			be32enc(&endiandata[19], n); 
			x11_hash((char*) hash64, (const char*) endiandata);
			if (fulltest(hash64, ptarget)) {
				*hashes_done = n - first_nonce + 1;
				return true;
			}
		} while (n < max_nonce && !work_restart[thr_id].restart);	
	}
	
	
	*hashes_done = n - first_nonce + 1;
	pdata[19] = n;
	return 0;
}