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#include <stdio.h>
#include <stdlib.h>
#include "sha256_mb.h"
#include "endian_helper.h"
#include <openssl/sha.h>
#define TEST_LEN  		(1024*1024ull)	//1M
#define TEST_BUFS 		SHA256_MIN_LANES
#define ROTATION_TIMES 		10000	//total length processing = TEST_LEN * ROTATION_TIMES
#define UPDATE_SIZE		(13*SHA256_BLOCK_SIZE)
#define LEN_TOTAL		(TEST_LEN * ROTATION_TIMES)

/* Reference digest global to reduce stack usage */
static uint8_t digest_ref_upd[4 * SHA256_DIGEST_NWORDS];

struct user_data {
	int idx;
	uint64_t processed;
};

int main(void)
{
	SHA256_CTX o_ctx;	//openSSL
	SHA256_HASH_CTX_MGR *mgr = NULL;
	SHA256_HASH_CTX ctxpool[TEST_BUFS], *ctx = NULL;
	uint32_t i, j, k, fail = 0;
	unsigned char *bufs[TEST_BUFS];
	struct user_data udata[TEST_BUFS];

	posix_memalign((void *)&mgr, 16, sizeof(SHA256_HASH_CTX_MGR));
	sha256_ctx_mgr_init(mgr);

	printf("sha256_large_test\n");

	// Init ctx contents
	for (i = 0; i < TEST_BUFS; i++) {
		bufs[i] = (unsigned char *)calloc((size_t)TEST_LEN, 1);
		if (bufs[i] == NULL) {
			printf("malloc failed test aborted\n");
			return 1;
		}
		hash_ctx_init(&ctxpool[i]);
		ctxpool[i].user_data = (void *)&udata[i];
	}

	//Openssl SHA256 update test
	SHA256_Init(&o_ctx);
	for (k = 0; k < ROTATION_TIMES; k++) {
		SHA256_Update(&o_ctx, bufs[k % TEST_BUFS], TEST_LEN);
	}
	SHA256_Final(digest_ref_upd, &o_ctx);

	// Initialize pool
	for (i = 0; i < TEST_BUFS; i++) {
		struct user_data *u = (struct user_data *)ctxpool[i].user_data;
		u->idx = i;
		u->processed = 0;
	}

	printf("Starting updates\n");
	int highest_pool_idx = 0;
	ctx = &ctxpool[highest_pool_idx++];
	while (ctx) {
		int len = UPDATE_SIZE;
		int update_type = HASH_UPDATE;
		struct user_data *u = (struct user_data *)ctx->user_data;
		int idx = u->idx;

		if (u->processed == 0)
			update_type = HASH_FIRST;

		else if (hash_ctx_complete(ctx)) {
			if (highest_pool_idx < TEST_BUFS)
				ctx = &ctxpool[highest_pool_idx++];
			else
				ctx = sha256_ctx_mgr_flush(mgr);
			continue;
		} else if (u->processed >= (LEN_TOTAL - UPDATE_SIZE)) {
			len = (LEN_TOTAL - u->processed);
			update_type = HASH_LAST;
		}
		u->processed += len;
		ctx = sha256_ctx_mgr_submit(mgr, ctx, bufs[idx], len, update_type);

		if (NULL == ctx) {
			if (highest_pool_idx < TEST_BUFS)
				ctx = &ctxpool[highest_pool_idx++];
			else
				ctx = sha256_ctx_mgr_flush(mgr);
		}
	}

	printf("multibuffer SHA256 digest: \n");
	for (i = 0; i < TEST_BUFS; i++) {
		printf("Total processing size of buf[%d] is %ld \n", i,
		       ctxpool[i].total_length);
		for (j = 0; j < SHA256_DIGEST_NWORDS; j++) {
			printf("digest%d : %08X\n", j, ctxpool[i].job.result_digest[j]);
		}
	}
	printf("\n");

	printf("openssl SHA256 update digest: \n");
	for (i = 0; i < SHA256_DIGEST_NWORDS; i++)
		printf("%08X - ", to_be32(((uint32_t *) digest_ref_upd)[i]));
	printf("\n");

	for (i = 0; i < TEST_BUFS; i++) {
		for (j = 0; j < SHA256_DIGEST_NWORDS; j++) {
			if (ctxpool[i].job.result_digest[j] !=
			    to_be32(((uint32_t *) digest_ref_upd)[j])) {
				fail++;
			}
		}
	}

	if (fail)
		printf("Test failed SHA256 hash large file check %d\n", fail);
	else
		printf(" SHA256_hash_large_test: Pass\n");
	return fail;
}
