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

#ifndef FUNCTION_UNDER_TEST
#define FUNCTION_UNDER_TEST gf_vect_dot_prod
#endif
#ifndef TEST_MIN_SIZE
#define TEST_MIN_SIZE 32
#endif

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

#define TEST_LEN  8192
#define TEST_SIZE (TEST_LEN / 2)

#ifndef TEST_SOURCES
#define TEST_SOURCES 16
#endif
#ifndef RANDOMS
#define RANDOMS 20
#endif

#define MMAX TEST_SOURCES
#define KMAX TEST_SOURCES

#ifdef EC_ALIGNED_ADDR
// Define power of 2 range to check ptr, len alignment
#define PTR_ALIGN_CHK_B 0
#define LEN_ALIGN_CHK_B 0 // 0 for aligned only
#else
// Define power of 2 range to check ptr, len alignment
#define PTR_ALIGN_CHK_B 32
#define LEN_ALIGN_CHK_B 32 // 0 for aligned only
#endif

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");
}

void
dump_matrix(unsigned char **s, int k, int m)
{
        int i, j;
        for (i = 0; i < k; i++) {
                for (j = 0; j < m; j++) {
                        printf(" %2x", s[i][j]);
                }
                printf("\n");
        }
        printf("\n");
}

void
dump_u8xu8(unsigned char *s, int k, int m)
{
        int i, j;
        for (i = 0; i < k; i++) {
                for (j = 0; j < m; j++) {
                        printf(" %2x", 0xff & s[j + (i * m)]);
                }
                printf("\n");
        }
        printf("\n");
}

int
main(int argc, char *argv[])
{
        int i, j, rtest, srcs, m, k, nerrs, r, err;
        void *buf;
        u8 g[TEST_SOURCES], g_tbls[TEST_SOURCES * 32], src_in_err[TEST_SOURCES];
        u8 *dest, *dest_ref, *temp_buff, *buffs[TEST_SOURCES];
        u8 a[MMAX * KMAX], b[MMAX * KMAX], d[MMAX * KMAX];
        u8 src_err_list[TEST_SOURCES], *recov[TEST_SOURCES];

        int align, size;
        unsigned char *efence_buffs[TEST_SOURCES];
        unsigned int offset;
        u8 *ubuffs[TEST_SOURCES];
        u8 *udest_ptr;

        printf(xstr(FUNCTION_UNDER_TEST) ": %dx%d ", TEST_SOURCES, TEST_LEN);

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

        if (posix_memalign(&buf, 64, TEST_LEN)) {
                printf("alloc error: Fail");
                return -1;
        }
        dest = buf;

        if (posix_memalign(&buf, 64, TEST_LEN)) {
                printf("alloc error: Fail");
                return -1;
        }
        dest_ref = buf;

        if (posix_memalign(&buf, 64, TEST_LEN)) {
                printf("alloc error: Fail");
                return -1;
        }
        temp_buff = buf;

        // Test of all zeros
        for (i = 0; i < TEST_SOURCES; i++)
                memset(buffs[i], 0, TEST_LEN);

        memset(dest, 0, TEST_LEN);
        memset(temp_buff, 0, TEST_LEN);
        memset(dest_ref, 0, TEST_LEN);
        memset(g, 0, TEST_SOURCES);

        for (i = 0; i < TEST_SOURCES; i++)
                gf_vect_mul_init(g[i], &g_tbls[i * 32]);

        gf_vect_dot_prod_base(TEST_LEN, TEST_SOURCES, &g_tbls[0], buffs, dest_ref);

        FUNCTION_UNDER_TEST(TEST_LEN, TEST_SOURCES, g_tbls, buffs, dest);

        if (0 != memcmp(dest_ref, dest, TEST_LEN)) {
                printf("Fail zero " xstr(FUNCTION_UNDER_TEST) " \n");
                dump_matrix(buffs, 5, TEST_SOURCES);
                printf("dprod_base:");
                dump(dest_ref, 25);
                printf("dprod:");
                dump(dest, 25);
                return -1;
        }
#ifdef TEST_VERBOSE
        else
                putchar('.');
#endif

        // Rand data test
        for (rtest = 0; rtest < RANDOMS; rtest++) {
                for (i = 0; i < TEST_SOURCES; i++)
                        for (j = 0; j < TEST_LEN; j++)
                                buffs[i][j] = rand();

                for (i = 0; i < TEST_SOURCES; i++)
                        g[i] = rand();

                for (i = 0; i < TEST_SOURCES; i++)
                        gf_vect_mul_init(g[i], &g_tbls[i * 32]);

                gf_vect_dot_prod_base(TEST_LEN, TEST_SOURCES, &g_tbls[0], buffs, dest_ref);
                FUNCTION_UNDER_TEST(TEST_LEN, TEST_SOURCES, g_tbls, buffs, dest);

                if (0 != memcmp(dest_ref, dest, TEST_LEN)) {
                        printf("Fail rand " xstr(FUNCTION_UNDER_TEST) " 1\n");
                        dump_matrix(buffs, 5, TEST_SOURCES);
                        printf("dprod_base:");
                        dump(dest_ref, 25);
                        printf("dprod:");
                        dump(dest, 25);
                        return -1;
                }

#ifdef TEST_VERBOSE
                putchar('.');
#endif
        }

        // Rand data test with varied parameters
        for (rtest = 0; rtest < RANDOMS; rtest++) {
                for (srcs = TEST_SOURCES; srcs > 0; srcs--) {
                        for (i = 0; i < srcs; i++)
                                for (j = 0; j < TEST_LEN; j++)
                                        buffs[i][j] = rand();

                        for (i = 0; i < srcs; i++)
                                g[i] = rand();

                        for (i = 0; i < srcs; i++)
                                gf_vect_mul_init(g[i], &g_tbls[i * 32]);

                        gf_vect_dot_prod_base(TEST_LEN, srcs, &g_tbls[0], buffs, dest_ref);
                        FUNCTION_UNDER_TEST(TEST_LEN, srcs, g_tbls, buffs, dest);

                        if (0 != memcmp(dest_ref, dest, TEST_LEN)) {
                                printf("Fail rand " xstr(FUNCTION_UNDER_TEST) " test 2\n");
                                dump_matrix(buffs, 5, srcs);
                                printf("dprod_base:");
                                dump(dest_ref, 5);
                                printf("dprod:");
                                dump(dest, 5);
                                return -1;
                        }

#ifdef TEST_VERBOSE
                        putchar('.');
#endif
                }
        }

        // Test erasure code using gf_vect_dot_prod

        // Pick a first test
        m = 9;
        k = 5;
        if (m > MMAX || k > KMAX)
                return -1;

        gf_gen_rs_matrix(a, m, k);

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

        // Make parity vects
        for (i = k; i < m; i++) {
                for (j = 0; j < k; j++)
                        gf_vect_mul_init(a[k * i + j], &g_tbls[j * 32]);
#ifndef USEREF
                FUNCTION_UNDER_TEST(TEST_LEN, k, g_tbls, buffs, buffs[i]);
#else
                gf_vect_dot_prod_base(TEST_LEN, k, &g_tbls[0], buffs, buffs[i]);
#endif
        }

        // Random buffers in erasure
        memset(src_in_err, 0, TEST_SOURCES);
        for (i = 0, nerrs = 0; i < k && nerrs < m - k; i++) {
                err = 1 & rand();
                src_in_err[i] = err;
                if (err)
                        src_err_list[nerrs++] = i;
        }

        // construct b by removing error rows
        for (i = 0, r = 0; i < k; i++, r++) {
                while (src_in_err[r]) {
                        r++;
                        continue;
                }
                for (j = 0; j < k; j++)
                        b[k * i + j] = a[k * r + j];
        }

        if (gf_invert_matrix((u8 *) b, (u8 *) d, k) < 0)
                printf("BAD MATRIX\n");

        for (i = 0, r = 0; i < k; i++, r++) {
                while (src_in_err[r]) {
                        r++;
                        continue;
                }
                recov[i] = buffs[r];
        }

        // Recover data
        for (i = 0; i < nerrs; i++) {
                for (j = 0; j < k; j++)
                        gf_vect_mul_init(d[k * src_err_list[i] + j], &g_tbls[j * 32]);
#ifndef USEREF
                FUNCTION_UNDER_TEST(TEST_LEN, k, g_tbls, recov, temp_buff);
#else
                gf_vect_dot_prod_base(TEST_LEN, k, &g_tbls[0], recov, temp_buff);
#endif

                if (0 != memcmp(temp_buff, buffs[src_err_list[i]], TEST_LEN)) {
                        printf("Fail error recovery (%d, %d, %d)\n", m, k, nerrs);
                        printf("recov %d:", src_err_list[i]);
                        dump(temp_buff, 25);
                        printf("orig   :");
                        dump(buffs[src_err_list[i]], 25);
                        return -1;
                }
        }

        // Do more random tests

        for (rtest = 0; rtest < RANDOMS; rtest++) {
                while ((m = (rand() % MMAX)) < 2)
                        ;
                while ((k = (rand() % KMAX)) >= m || k < 1)
                        ;

                if (m > MMAX || k > KMAX)
                        continue;

                gf_gen_rs_matrix(a, m, k);

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

                // Make parity vects
                for (i = k; i < m; i++) {
                        for (j = 0; j < k; j++)
                                gf_vect_mul_init(a[k * i + j], &g_tbls[j * 32]);
#ifndef USEREF
                        FUNCTION_UNDER_TEST(TEST_LEN, k, g_tbls, buffs, buffs[i]);
#else
                        gf_vect_dot_prod_base(TEST_LEN, k, &g_tbls[0], buffs, buffs[i]);
#endif
                }

                // Random errors
                memset(src_in_err, 0, TEST_SOURCES);
                for (i = 0, nerrs = 0; i < k && nerrs < m - k; i++) {
                        err = 1 & rand();
                        src_in_err[i] = err;
                        if (err)
                                src_err_list[nerrs++] = i;
                }
                if (nerrs == 0) { // should have at least one error
                        while ((err = (rand() % KMAX)) >= k)
                                ;
                        src_err_list[nerrs++] = err;
                        src_in_err[err] = 1;
                }
                // construct b by removing error rows
                for (i = 0, r = 0; i < k; i++, r++) {
                        while (src_in_err[r]) {
                                r++;
                                continue;
                        }
                        for (j = 0; j < k; j++)
                                b[k * i + j] = a[k * r + j];
                }

                if (gf_invert_matrix((u8 *) b, (u8 *) d, k) < 0)
                        printf("BAD MATRIX\n");

                for (i = 0, r = 0; i < k; i++, r++) {
                        while (src_in_err[r]) {
                                r++;
                                continue;
                        }
                        recov[i] = buffs[r];
                }

                // Recover data
                for (i = 0; i < nerrs; i++) {
                        for (j = 0; j < k; j++)
                                gf_vect_mul_init(d[k * src_err_list[i] + j], &g_tbls[j * 32]);
#ifndef USEREF
                        FUNCTION_UNDER_TEST(TEST_LEN, k, g_tbls, recov, temp_buff);
#else
                        gf_vect_dot_prod_base(TEST_LEN, k, &g_tbls[0], recov, temp_buff);
#endif
                        if (0 != memcmp(temp_buff, buffs[src_err_list[i]], TEST_LEN)) {
                                printf("Fail error recovery (%d, %d, %d) - ", m, k, nerrs);
                                printf(" - erase list = ");
                                for (i = 0; i < nerrs; i++)
                                        printf(" %d", src_err_list[i]);
                                printf("\na:\n");
                                dump_u8xu8((u8 *) a, m, k);
                                printf("inv b:\n");
                                dump_u8xu8((u8 *) d, k, k);
                                printf("orig data:\n");
                                dump_matrix(buffs, m, 25);
                                printf("orig   :");
                                dump(buffs[src_err_list[i]], 25);
                                printf("recov %d:", src_err_list[i]);
                                dump(temp_buff, 25);
                                return -1;
                        }
                }
#ifdef TEST_VERBOSE
                putchar('.');
#endif
        }

        // Run tests at end of buffer for Electric Fence
        align = (LEN_ALIGN_CHK_B != 0) ? 1 : 16;
        for (size = TEST_MIN_SIZE; size <= TEST_SIZE; size += align) {
                for (i = 0; i < TEST_SOURCES; i++)
                        for (j = 0; j < TEST_LEN; j++)
                                buffs[i][j] = rand();

                for (i = 0; i < TEST_SOURCES; i++) // Line up TEST_SIZE from end
                        efence_buffs[i] = buffs[i] + TEST_LEN - size;

                for (i = 0; i < TEST_SOURCES; i++)
                        g[i] = rand();

                for (i = 0; i < TEST_SOURCES; i++)
                        gf_vect_mul_init(g[i], &g_tbls[i * 32]);

                gf_vect_dot_prod_base(size, TEST_SOURCES, &g_tbls[0], efence_buffs, dest_ref);
                FUNCTION_UNDER_TEST(size, TEST_SOURCES, g_tbls, efence_buffs, dest);

                if (0 != memcmp(dest_ref, dest, size)) {
                        printf("Fail rand " xstr(FUNCTION_UNDER_TEST) " test 3\n");
                        dump_matrix(efence_buffs, 5, TEST_SOURCES);
                        printf("dprod_base:");
                        dump(dest_ref, align);
                        printf("dprod:");
                        dump(dest, align);
                        return -1;
                }

#ifdef TEST_VERBOSE
                putchar('.');
#endif
        }

        // Test rand ptr alignment if available

        for (rtest = 0; rtest < RANDOMS; rtest++) {
                size = (TEST_LEN - PTR_ALIGN_CHK_B) & ~(TEST_MIN_SIZE - 1);
                srcs = rand() % TEST_SOURCES;
                if (srcs == 0)
                        continue;

                offset = (PTR_ALIGN_CHK_B != 0) ? 1 : PTR_ALIGN_CHK_B;
                // Add random offsets
                for (i = 0; i < srcs; i++)
                        ubuffs[i] = buffs[i] + (rand() & (PTR_ALIGN_CHK_B - offset));

                udest_ptr = dest + (rand() & (PTR_ALIGN_CHK_B - offset));

                memset(dest, 0, TEST_LEN); // zero pad to check write-over

                for (i = 0; i < srcs; i++)
                        for (j = 0; j < size; j++)
                                ubuffs[i][j] = rand();

                for (i = 0; i < srcs; i++)
                        g[i] = rand();

                for (i = 0; i < srcs; i++)
                        gf_vect_mul_init(g[i], &g_tbls[i * 32]);

                gf_vect_dot_prod_base(size, srcs, &g_tbls[0], ubuffs, dest_ref);

                FUNCTION_UNDER_TEST(size, srcs, g_tbls, ubuffs, udest_ptr);

                if (memcmp(dest_ref, udest_ptr, size)) {
                        printf("Fail rand " xstr(FUNCTION_UNDER_TEST) " ualign srcs=%d\n", srcs);
                        dump_matrix(ubuffs, 5, TEST_SOURCES);
                        printf("dprod_base:");
                        dump(dest_ref, 25);
                        printf("dprod:");
                        dump(udest_ptr, 25);
                        return -1;
                }
                // Confirm that padding around dests is unchanged
                memset(dest_ref, 0, PTR_ALIGN_CHK_B); // Make reference zero buff
                offset = udest_ptr - dest;

                if (memcmp(dest, dest_ref, offset)) {
                        printf("Fail rand ualign pad start\n");
                        return -1;
                }
                if (memcmp(dest + offset + size, dest_ref, PTR_ALIGN_CHK_B - offset)) {
                        printf("Fail rand ualign pad end\n");
                        return -1;
                }

#ifdef TEST_VERBOSE
                putchar('.');
#endif
        }

        // Test all size alignment
        align = (LEN_ALIGN_CHK_B != 0) ? 1 : 16;

        for (size = TEST_LEN; size >= TEST_MIN_SIZE; size -= align) {
                srcs = TEST_SOURCES;

                for (i = 0; i < srcs; i++)
                        for (j = 0; j < size; j++)
                                buffs[i][j] = rand();

                for (i = 0; i < srcs; i++)
                        g[i] = rand();

                for (i = 0; i < srcs; i++)
                        gf_vect_mul_init(g[i], &g_tbls[i * 32]);

                gf_vect_dot_prod_base(size, srcs, &g_tbls[0], buffs, dest_ref);

                FUNCTION_UNDER_TEST(size, srcs, g_tbls, buffs, dest);

                if (memcmp(dest_ref, dest, size)) {
                        printf("Fail rand " xstr(FUNCTION_UNDER_TEST) " ualign len=%d\n", size);
                        dump_matrix(buffs, 5, TEST_SOURCES);
                        printf("dprod_base:");
                        dump(dest_ref, 25);
                        printf("dprod:");
                        dump(dest, 25);
                        return -1;
                }
        }

        printf("done all: Pass\n");

        // Free allocated memory
        for (i = 0; i < TEST_SOURCES; i++) {
                aligned_free(buffs[i]);
        }
        aligned_free(dest);
        aligned_free(dest_ref);
        aligned_free(temp_buff);

        return 0;
}
