/*      $OpenBSD: lhash_test.c,v 1.2 2024/05/08 15:13:23 jsing Exp $    */
/*
 * Copyright (c) 2024 Joel Sing <jsing@openbsd.org>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

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

#include <openssl/lhash.h>

/*
 * Need to add test coverage for:
 *  - custom hash function
 *  - custom comparison function
 */

static void
test_doall_count(void *arg1, void *arg2)
{
        int *count = arg2;

        (*count)++;
}

static int
test_lhash(void)
{
        const char *a = "a", *b = "b", *c = "c", *d = "d";
        const char *a2 = "a", *b2 = "b";
        _LHASH *lh;
        int count;
        int failed = 1;

        if ((lh = lh_new(NULL, NULL)) == NULL)
                goto failure;

        /*
         * Another amazing API... both a successful insert and a failure will
         * return NULL. The only way you can tell the difference is to follow
         * with a call to lh_error().
         */
        if (lh_retrieve(lh, "a") != NULL || lh_error(lh) != 0) {
                fprintf(stderr, "FAIL: retrieved a before insert\n");
                goto failure;
        }
        if (lh_insert(lh, (void *)a) != NULL || lh_error(lh) != 0) {
                fprintf(stderr, "FAIL: insert a\n");
                goto failure;
        }
        if (lh_retrieve(lh, "a") != a) {
                fprintf(stderr, "FAIL: failed to retrieve a\n");
                goto failure;
        }

        if (lh_retrieve(lh, "b") != NULL || lh_error(lh) != 0) {
                fprintf(stderr, "FAIL: retrieved b before insert\n");
                goto failure;
        }
        if (lh_insert(lh, (void *)b) != NULL || lh_error(lh) != 0) {
                fprintf(stderr, "FAIL: insert b\n");
                goto failure;
        }
        if (lh_retrieve(lh, "b") != b) {
                fprintf(stderr, "FAIL: failed to retrieve b\n");
                goto failure;
        }

        if (lh_retrieve(lh, "c") != NULL || lh_error(lh) != 0) {
                fprintf(stderr, "FAIL: retrieved c before insert\n");
                goto failure;
        }
        if (lh_insert(lh, (void *)c) != NULL || lh_error(lh) != 0) {
                fprintf(stderr, "FAIL: insert c\n");
                goto failure;
        }
        if (lh_retrieve(lh, "c") != c) {
                fprintf(stderr, "FAIL: failed to retrieve c\n");
                goto failure;
        }

        if (lh_retrieve(lh, "d") != NULL || lh_error(lh) != 0) {
                fprintf(stderr, "FAIL: retrieved d before insert\n");
                goto failure;
        }
        if (lh_insert(lh, (void *)d) != NULL || lh_error(lh) != 0) {
                fprintf(stderr, "FAIL: insert d\n");
                goto failure;
        }
        if (lh_retrieve(lh, "d") != d) {
                fprintf(stderr, "FAIL: failed to retrieve d\n");
                goto failure;
        }

        if (lh_num_items(lh) != 4) {
                fprintf(stderr, "FAIL: lh_num_items() = %ld, want 4\n",
                    lh_num_items(lh));
                goto failure;
        }

        /* Insert should replace. */
        if (lh_insert(lh, (void *)a2) != a || lh_error(lh) != 0) {
                fprintf(stderr, "FAIL: replace a\n");
                goto failure;
        }
        if (lh_retrieve(lh, "a") != a2) {
                fprintf(stderr, "FAIL: failed to retrieve a2\n");
                goto failure;
        }
        if (lh_insert(lh, (void *)b2) != b || lh_error(lh) != 0) {
                fprintf(stderr, "FAIL: replace b\n");
                goto failure;
        }
        if (lh_retrieve(lh, "b") != b2) {
                fprintf(stderr, "FAIL: failed to retrieve b2\n");
                goto failure;
        }

        if (lh_num_items(lh) != 4) {
                fprintf(stderr, "FAIL: lh_num_items() = %ld, want 4\n",
                    lh_num_items(lh));
                goto failure;
        }

        /* Do all. */
        count = 0;
        lh_doall_arg(lh, test_doall_count, &count);
        if (count != 4) {
                fprintf(stderr, "FAIL: lh_doall_arg failed (count = %d)\n",
                    count);
                goto failure;
        }

        /* Delete. */
        if (lh_delete(lh, "z") != NULL || lh_error(lh) != 0) {
                fprintf(stderr, "FAIL: delete succeeded for z\n");
                goto failure;
        }
        if (lh_delete(lh, "a") != a2 || lh_error(lh) != 0) {
                fprintf(stderr, "FAIL: delete failed for a\n");
                goto failure;
        }
        if (lh_retrieve(lh, "a") != NULL || lh_error(lh) != 0) {
                fprintf(stderr, "FAIL: retrieved a after deletion\n");
                goto failure;
        }
        if (lh_delete(lh, "b") != b2 || lh_error(lh) != 0) {
                fprintf(stderr, "FAIL: delete failed for b\n");
                goto failure;
        }
        if (lh_retrieve(lh, "b") != NULL || lh_error(lh) != 0) {
                fprintf(stderr, "FAIL: retrieved b after deletion\n");
                goto failure;
        }
        if (lh_delete(lh, "c") != c || lh_error(lh) != 0) {
                fprintf(stderr, "FAIL: delete failed for c\n");
                goto failure;
        }
        if (lh_retrieve(lh, "c") != NULL || lh_error(lh) != 0) {
                fprintf(stderr, "FAIL: retrieved c after deletion\n");
                goto failure;
        }
        if (lh_delete(lh, "d") != d || lh_error(lh) != 0) {
                fprintf(stderr, "FAIL: delete failed for d\n");
                goto failure;
        }
        if (lh_retrieve(lh, "d") != NULL || lh_error(lh) != 0) {
                fprintf(stderr, "FAIL: retrieved d after deletion\n");
                goto failure;
        }

        if (lh_num_items(lh) != 0) {
                fprintf(stderr, "FAIL: lh_num_items() = %ld, want 0\n",
                    lh_num_items(lh));
                goto failure;
        }

        failed = 0;

 failure:
        lh_free(lh);

        return failed;
}

static void
test_doall_fn(void *arg1)
{
}

static int
test_lhash_doall(void)
{
        _LHASH *lh;
        int i;
        int failed = 1;

        if ((lh = lh_new(NULL, NULL)) == NULL)
                goto failure;

        /* Call doall multiple times while linked hash is empty. */
        for (i = 0; i < 100; i++)
                lh_doall(lh, test_doall_fn);

        failed = 0;

 failure:
        lh_free(lh);

        return failed;
}

static void
test_doall_delete_some(void *arg1, void *arg2)
{
        void *data;

        if (arc4random_uniform(32) != 0)
                return;

        data = lh_delete(arg2, arg1);
        free(data);
}

static void
test_doall_delete_all(void *arg1, void *arg2)
{
        void *data;

        data = lh_delete(arg2, arg1);
        free(data);
}

static int
test_lhash_load(void)
{
        uint8_t c3 = 1, c2 = 1, c1 = 1, c0 = 1;
        _LHASH *lh;
        char *data = NULL;
        int i, j;
        int failed = 1;

        if ((lh = lh_new(NULL, NULL)) == NULL)
                goto failure;

        for (i = 0; i < 1024; i++) {
                for (j = 0; j < 1024; j++) {
                        if ((data = calloc(1, 128)) == NULL)
                                goto failure;

                        data[0] = c0;
                        data[1] = c1;
                        data[2] = c2;
                        data[3] = c3;

                        if (++c0 == 0) {
                                c0++;
                                c1++;
                        }
                        if (c1 == 0) {
                                c1++;
                                c2++;
                        }
                        if (c2 == 0) {
                                c2++;
                                c3++;
                        }

                        if (lh_insert(lh, data) != NULL || lh_error(lh) != 0) {
                                fprintf(stderr, "FAIL: lh_insert() failed\n");
                                goto failure;
                        }
                        data = NULL;
                }
                lh_doall_arg(lh, test_doall_delete_some, lh);
        }

        /* We should have ~31,713 entries. */
        if (lh_num_items(lh) < 31000 || lh_num_items(lh) > 33000) {
                fprintf(stderr, "FAIL: unexpected number of entries (%ld)\n",
                    lh_num_items(lh));
                goto failure;
        }

        failed = 0;

 failure:
        if (lh != NULL)
                lh_doall_arg(lh, test_doall_delete_all, lh);

        lh_free(lh);
        free(data);

        return failed;
}

int
main(int argc, char **argv)
{
        int failed = 0;

        failed |= test_lhash();
        failed |= test_lhash_doall();
        failed |= test_lhash_load();

        return failed;
}