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#include <stdio.h>
#include <stdlib.h>
#include <string.h>		// for memset, memcmp
#include "erasure_code.h"
#include "types.h"
#include "test.h"

//By default, test multibinary version
#ifndef FUNCTION_UNDER_TEST
# define FUNCTION_UNDER_TEST ec_encode_data_update
# define REF_FUNCTION ec_encode_data
#endif

//By default, test EC(8+4)
#if (!defined(VECT))
# define VECT 4
#endif

#define str(s) #s
#define xstr(s) str(s)

//#define CACHED_TEST
#ifdef CACHED_TEST
// Cached test, loop many times over small dataset
# define TEST_SOURCES 32
# define TEST_LEN(m)  ((128*1024 / m) & ~(64-1))
# define TEST_LOOPS(m)   (10000*m)
# define TEST_TYPE_STR "_warm"
#else
# ifndef TEST_CUSTOM
// Uncached test.  Pull from large mem base.
#  define TEST_SOURCES 32
#  define GT_L3_CACHE  32*1024*1024	/* some number > last level cache */
#  define TEST_LEN(m)  ((GT_L3_CACHE / m) & ~(64-1))
#  define TEST_LOOPS(m)   (50*m)
#  define TEST_TYPE_STR "_cold"
# else
#  define TEST_TYPE_STR "_cus"
#  ifndef TEST_LOOPS
#    define TEST_LOOPS(m) 1000
#  endif
# endif
#endif

#define MMAX TEST_SOURCES
#define KMAX TEST_SOURCES

typedef unsigned char u8;

void dump(unsigned char *buf, int len)
{
	int i;
	for (i = 0; i < len;) {
		printf(" %2x", 0xff & buf[i++]);
		if (i % 32 == 0)
			printf("\n");
	}
	printf("\n");
}

int main(int argc, char *argv[])
{
	int i, j, rtest, m, k, nerrs, r;
	void *buf;
	u8 *temp_buffs[TEST_SOURCES], *buffs[TEST_SOURCES];
	u8 *update_buffs[TEST_SOURCES];
	u8 *perf_update_buffs[TEST_SOURCES];
	u8 a[MMAX * KMAX], b[MMAX * KMAX], c[MMAX * KMAX], d[MMAX * KMAX];
	u8 g_tbls[KMAX * TEST_SOURCES * 32], src_in_err[TEST_SOURCES];
	u8 src_err_list[TEST_SOURCES], *recov[TEST_SOURCES];
	struct perf start, stop;

	// Pick test parameters
	k = 10;
	m = k + VECT;
	nerrs = VECT;
	const u8 err_list[] = { 0, 2, 4, 5, 7, 8 };

	printf(xstr(FUNCTION_UNDER_TEST) "_perf: %dx%d %d\n", m, TEST_LEN(m), nerrs);

	if (m > MMAX || k > KMAX || nerrs > (m - k)) {
		printf(" Input test parameter error\n");
		return -1;
	}

	memcpy(src_err_list, err_list, nerrs);
	memset(src_in_err, 0, TEST_SOURCES);
	for (i = 0; i < nerrs; i++)
		src_in_err[src_err_list[i]] = 1;

	// Allocate the arrays
	for (i = 0; i < m; i++) {
		if (posix_memalign(&buf, 64, TEST_LEN(m))) {
			printf("alloc error: Fail\n");
			return -1;
		}
		buffs[i] = buf;
	}

	for (i = 0; i < (m - k); i++) {
		if (posix_memalign(&buf, 64, TEST_LEN(m))) {
			printf("alloc error: Fail\n");
			return -1;
		}
		temp_buffs[i] = buf;
		memset(temp_buffs[i], 0, TEST_LEN(m));	// initialize the destination buffer to be zero for update function
	}

	for (i = 0; i < TEST_SOURCES; i++) {
		if (posix_memalign(&buf, 64, TEST_LEN(m))) {
			printf("alloc error: Fail");
			return -1;
		}
		update_buffs[i] = buf;
		memset(update_buffs[i], 0, TEST_LEN(m));	// initialize the destination buffer to be zero for update function
	}
	for (i = 0; i < TEST_SOURCES; i++) {
		if (posix_memalign(&buf, 64, TEST_LEN(m))) {
			printf("alloc error: Fail");
			return -1;
		}
		perf_update_buffs[i] = buf;
		memset(perf_update_buffs[i], 0, TEST_LEN(m));	// initialize the destination buffer to be zero for update function
	}

	// Make random data
	for (i = 0; i < k; i++)
		for (j = 0; j < TEST_LEN(m); j++) {
			buffs[i][j] = rand();
			update_buffs[i][j] = buffs[i][j];
		}

	gf_gen_rs_matrix(a, m, k);
	ec_init_tables(k, m - k, &a[k * k], g_tbls);
	REF_FUNCTION(TEST_LEN(m), k, m - k, g_tbls, buffs, &buffs[k]);

	for (i = 0; i < k; i++) {
		FUNCTION_UNDER_TEST(TEST_LEN(m), k, m - k, i, g_tbls, update_buffs[i],
				    &update_buffs[k]);
	}
	for (i = 0; i < m - k; i++) {
		if (0 != memcmp(update_buffs[k + i], buffs[k + i], TEST_LEN(m))) {
			printf("\nupdate_buffs%d  :", i);
			dump(update_buffs[k + i], 25);
			printf("buffs%d         :", i);
			dump(buffs[k + i], 25);
			return -1;
		}
	}

#ifdef DO_REF_PERF
	REF_FUNCTION(TEST_LEN(m), k, m - k, g_tbls, buffs, &buffs[k]);
	// Start encode test
	perf_start(&start);
	for (rtest = 0; rtest < TEST_LOOPS(m); rtest++) {
		// Make parity vects
		ec_init_tables(k, m - k, &a[k * k], g_tbls);
		REF_FUNCTION(TEST_LEN(m), k, m - k, g_tbls, buffs, &buffs[k]);
	}
	perf_stop(&stop);
	printf(xstr(REF_FUNCTION) TEST_TYPE_STR ": ");
	perf_print(stop, start, (long long)(TEST_LEN(m)) * (m) * rtest);
#endif
	for (i = 0; i < k; i++) {
		FUNCTION_UNDER_TEST(TEST_LEN(m), k, m - k, i, g_tbls, perf_update_buffs[i],
				    &perf_update_buffs[k]);
	}
	// Start encode test
	perf_start(&start);
	for (rtest = 0; rtest < TEST_LOOPS(m); rtest++) {
		// Make parity vects
		ec_init_tables(k, m - k, &a[k * k], g_tbls);
		for (i = 0; i < k; i++) {
			FUNCTION_UNDER_TEST(TEST_LEN(m), k, m - k, i, g_tbls,
					    perf_update_buffs[i], &perf_update_buffs[k]);
		}
	}
	perf_stop(&stop);
	printf(xstr(FUNCTION_UNDER_TEST) TEST_TYPE_STR ": ");
	perf_print(stop, start, (long long)(TEST_LEN(m)) * (m) * rtest);

	// Start encode test
	perf_start(&start);
	for (rtest = 0; rtest < TEST_LOOPS(m); rtest++) {
		// Make parity vects
		ec_init_tables(k, m - k, &a[k * k], g_tbls);
		FUNCTION_UNDER_TEST(TEST_LEN(m), k, m - k, 0, g_tbls, perf_update_buffs[0],
				    &perf_update_buffs[k]);
	}
	perf_stop(&stop);
	printf(xstr(FUNCTION_UNDER_TEST) "_single_src" TEST_TYPE_STR ": ");
	perf_print(stop, start, (long long)(TEST_LEN(m)) * (m - k + 1) * rtest);

	// Start encode test
	perf_start(&start);
	for (rtest = 0; rtest < TEST_LOOPS(m); rtest++) {
		// Make parity vects
		FUNCTION_UNDER_TEST(TEST_LEN(m), k, m - k, 0, g_tbls, perf_update_buffs[0],
				    &perf_update_buffs[k]);
	}
	perf_stop(&stop);
	printf(xstr(FUNCTION_UNDER_TEST) "_single_src_simple" TEST_TYPE_STR ": ");
	perf_print(stop, start, (long long)(TEST_LEN(m)) * (m - k + 1) * rtest);

	for (i = k; i < m; i++) {
		memset(update_buffs[i], 0, TEST_LEN(m));	// initialize the destination buffer to be zero for update function
	}
	for (i = 0; i < k; i++) {
		FUNCTION_UNDER_TEST(TEST_LEN(m), k, m - k, i, g_tbls, update_buffs[i],
				    &update_buffs[k]);
	}
	// Construct b by removing error rows
	for (i = 0, r = 0; i < k; i++, r++) {
		while (src_in_err[r])
			r++;
		recov[i] = update_buffs[r];
		for (j = 0; j < k; j++)
			b[k * i + j] = a[k * r + j];
	}

	if (gf_invert_matrix(b, d, k) < 0) {
		printf("BAD MATRIX\n");
		return -1;
	}

	for (i = 0; i < nerrs; i++)
		for (j = 0; j < k; j++)
			c[k * i + j] = d[k * src_err_list[i] + j];

	// Recover data
	ec_init_tables(k, nerrs, c, g_tbls);
	for (i = 0; i < k; i++) {
		FUNCTION_UNDER_TEST(TEST_LEN(m), k, nerrs, i, g_tbls, recov[i], temp_buffs);
	}
	// Start decode test
	perf_start(&start);
	for (rtest = 0; rtest < TEST_LOOPS(m); rtest++) {
		// Construct b by removing error rows
		for (i = 0, r = 0; i < k; i++, r++) {
			while (src_in_err[r])
				r++;
			recov[i] = update_buffs[r];
			for (j = 0; j < k; j++)
				b[k * i + j] = a[k * r + j];
		}

		if (gf_invert_matrix(b, d, k) < 0) {
			printf("BAD MATRIX\n");
			return -1;
		}

		for (i = 0; i < nerrs; i++)
			for (j = 0; j < k; j++)
				c[k * i + j] = d[k * src_err_list[i] + j];

		// Recover data
		ec_init_tables(k, nerrs, c, g_tbls);
		for (i = 0; i < k; i++) {
			FUNCTION_UNDER_TEST(TEST_LEN(m), k, nerrs, i, g_tbls, recov[i],
					    perf_update_buffs);
		}
	}
	perf_stop(&stop);

	for (i = 0; i < nerrs; i++) {
		if (0 != memcmp(temp_buffs[i], update_buffs[src_err_list[i]], TEST_LEN(m))) {
			printf("Fail error recovery (%d, %d, %d) - ", m, k, nerrs);
			return -1;
		}
	}

	printf(xstr(FUNCTION_UNDER_TEST) "_decode" TEST_TYPE_STR ": ");
	perf_print(stop, start, (long long)(TEST_LEN(m)) * (k + nerrs) * rtest);

	printf("done all: Pass\n");
	return 0;
}
