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#include <stdio.h>
#include <stdlib.h>
#include <string.h> // for memset, memcmp
#include "erasure-code.h"
#include "erasure/tests.h"

//#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;

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 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
        m = 14;
        k = 10;
        nerrs = 4;
        const u8 err_list[] = {2, 4, 5, 7};

        printf("erasure_code_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;
        }

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

        gf_gen_rs_matrix(a, m, k);
        ec_init_tables(k, m - k, &a[k * k], g_tbls);
        ec_encode_data(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);
                ec_encode_data(TEST_LEN(m), k, m - k, g_tbls, buffs, &buffs[k]);
        }
        perf_stop(&stop);
        printf("erasure_code_encode" TEST_TYPE_STR ": ");
        perf_print(stop, start, (long long)(TEST_LEN(m)) * (m) * rtest);

        // 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] = 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);
                ec_encode_data(TEST_LEN(m), k, nerrs, g_tbls, recov, temp_buffs);
        }
        perf_stop(&stop);

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

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

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