/* -*- mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*- */
// vim: ft=cpp:expandtab:ts=8:sw=4:softtabstop=4:
#ident "$Id$"
/*
COPYING CONDITIONS NOTICE:

  This program is free software; you can redistribute it and/or modify
  it under the terms of version 2 of the GNU General Public License as
  published by the Free Software Foundation, and provided that the
  following conditions are met:

      * Redistributions of source code must retain this COPYING
        CONDITIONS NOTICE, the COPYRIGHT NOTICE (below), the
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        GRANT (below).

      * Redistributions in binary form must reproduce this COPYING
        CONDITIONS NOTICE, the COPYRIGHT NOTICE (below), the
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        PATENT MARKING NOTICE (below), and the PATENT RIGHTS
        GRANT (below) in the documentation and/or other materials
        provided with the distribution.

  You should have received a copy of the GNU General Public License
  along with this program; if not, write to the Free Software
  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  02110-1301, USA.

COPYRIGHT NOTICE:

  TokuDB, Tokutek Fractal Tree Indexing Library.
  Copyright (C) 2007-2013 Tokutek, Inc.

DISCLAIMER:

  This program is distributed in the hope that it will be useful, but
  WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  General Public License for more details.

UNIVERSITY PATENT NOTICE:

  The technology is licensed by the Massachusetts Institute of
  Technology, Rutgers State University of New Jersey, and the Research
  Foundation of State University of New York at Stony Brook under
  United States of America Serial No. 11/760379 and to the patents
  and/or patent applications resulting from it.

PATENT MARKING NOTICE:

  This software is covered by US Patent No. 8,185,551.

PATENT RIGHTS GRANT:

  THIS IMPLEMENTATION" means the copyrightable works distributed by
  Tokutek as part of the Fractal Tree project.

  "PATENT CLAIMS" means the claims of patents that are owned or
  licensable by Tokutek, both currently or in the future; and that in
  the absence of this license would be infringed by THIS
  IMPLEMENTATION or by using or running THIS IMPLEMENTATION.

  "PATENT CHALLENGE" shall mean a challenge to the validity,
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  Tokutek hereby grants to you, for the term and geographical scope of
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  otherwise run, modify, and propagate the contents of THIS
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  IMPLEMENTATION.  If you or your agent or licensee institute or order
  or agree to the institution of patent litigation against any entity
  (including a cross-claim or counterclaim in a lawsuit) alleging that
  THIS IMPLEMENTATION constitutes direct or contributory patent
  infringement, or inducement of patent infringement, then any rights
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  such litigation is filed.  If you or your agent or exclusive
  licensee institute or order or agree to the institution of a PATENT
  CHALLENGE, then Tokutek may terminate any rights granted to you
  under this License.
*/

#ident "Copyright (c) 2010-2013 Tokutek Inc.  All rights reserved."

// test the LE_CURSOR next function with provisionally deleted rows


#include "checkpoint.h"
#include "le-cursor.h"
#include "test.h"

static TOKUTXN const null_txn = 0;
static DB * const null_db = 0;

static int
get_next_callback(ITEMLEN UU(keylen), bytevec UU(key), ITEMLEN vallen, bytevec val, void *extra, bool lock_only) {
    DBT *CAST_FROM_VOIDP(val_dbt, extra);
    if (!lock_only) {
        toku_dbt_set(vallen, val, val_dbt, NULL);
    }
    return 0;
}

static int
le_cursor_get_next(LE_CURSOR cursor, DBT *val) {
    int r = toku_le_cursor_next(cursor, get_next_callback, val);
    return r;
}

static int test_ft_cursor_keycompare(DB *desc __attribute__((unused)), const DBT *a, const DBT *b) {
    return toku_keycompare(a->data, a->size, b->data, b->size);
}

// create a tree and populate it with n rows
static void
create_populate_tree(const char *logdir, const char *fname, int n) {
    if (verbose) fprintf(stderr, "%s %s %s %d\n", __FUNCTION__, logdir, fname, n);
    int error;

    TOKULOGGER logger = NULL;
    error = toku_logger_create(&logger);
    assert(error == 0);
    error = toku_logger_open(logdir, logger);
    assert(error == 0);
    CACHETABLE ct = NULL;
    toku_cachetable_create(&ct, 0, ZERO_LSN, logger);
    toku_logger_set_cachetable(logger, ct);
    error = toku_logger_open_rollback(logger, ct, true);
    assert(error == 0);

    TOKUTXN txn = NULL;
    error = toku_txn_begin_txn(NULL, NULL, &txn, logger, TXN_SNAPSHOT_NONE, false);
    assert(error == 0);

    FT_HANDLE brt = NULL;
    error = toku_open_ft_handle(fname, 1, &brt, 1<<12, 1<<9, TOKU_DEFAULT_COMPRESSION_METHOD, ct, txn, test_ft_cursor_keycompare);
    assert(error == 0);

    error = toku_txn_commit_txn(txn, true, NULL, NULL);
    assert(error == 0);
    toku_txn_close_txn(txn);

    txn = NULL;
    error = toku_txn_begin_txn(NULL, NULL, &txn, logger, TXN_SNAPSHOT_NONE, false);
    assert(error == 0);

    // insert keys 0, 1, 2, .. (n-1)
    for (int i = 0; i < n; i++) {
        int k = toku_htonl(i);
        int v = i;
        DBT key;
        toku_fill_dbt(&key, &k, sizeof k);
        DBT val;
        toku_fill_dbt(&val, &v, sizeof v);
        toku_ft_insert(brt, &key, &val, txn);
        assert(error == 0);
    }

    error = toku_txn_commit_txn(txn, true, NULL, NULL);
    assert(error == 0);
    toku_txn_close_txn(txn);

    error = toku_close_ft_handle_nolsn(brt, NULL);
    assert(error == 0);
    
    CHECKPOINTER cp = toku_cachetable_get_checkpointer(ct);
    error = toku_checkpoint(cp, logger, NULL, NULL, NULL, NULL, CLIENT_CHECKPOINT);
    assert(error == 0);

    toku_logger_close_rollback(logger);
    
    error = toku_checkpoint(cp, logger, NULL, NULL, NULL, NULL, CLIENT_CHECKPOINT);
    assert(error == 0);

    toku_logger_shutdown(logger);

    error = toku_logger_close(&logger);
    assert(error == 0);

    toku_cachetable_close(&ct);
}

// provionally delete all of the even keys
// the LE_CURSOR should see all of the leaf entries
static void 
test_provdel(const char *logdir, const char *fname, int n) {
    if (verbose) fprintf(stderr, "%s %s %s %d\n", __FUNCTION__, logdir, fname, n);
    int error;

    TOKULOGGER logger = NULL;
    error = toku_logger_create(&logger);
    assert(error == 0);
    error = toku_logger_open(logdir, logger);
    assert(error == 0);
    CACHETABLE ct = NULL;
    toku_cachetable_create(&ct, 0, ZERO_LSN, logger);
    toku_logger_set_cachetable(logger, ct);
    error = toku_logger_open_rollback(logger, ct, false);
    assert(error == 0);

    TOKUTXN txn = NULL;
    error = toku_txn_begin_txn(NULL, NULL, &txn, logger, TXN_SNAPSHOT_NONE, false);
    assert(error == 0);

    FT_HANDLE brt = NULL;
    error = toku_open_ft_handle(fname, 1, &brt, 1<<12, 1<<9, TOKU_DEFAULT_COMPRESSION_METHOD, ct, txn, test_ft_cursor_keycompare);
    assert(error == 0);

    error = toku_txn_commit_txn(txn, true, NULL, NULL);
    assert(error == 0);
    toku_txn_close_txn(txn);

    txn = NULL;
    error = toku_txn_begin_txn(NULL, NULL, &txn, logger, TXN_SNAPSHOT_NONE, false);
    assert(error == 0);

    // del keys 0, 2, 4, ...
    for (int i = 0; i < n; i += 2) {
        int k = toku_htonl(i);
        DBT key;
        toku_fill_dbt(&key, &k, sizeof k);
        toku_ft_delete(brt, &key, txn);
        assert(error == 0);
    }

    TOKUTXN cursortxn = NULL;
    error = toku_txn_begin_txn(NULL, NULL, &cursortxn, logger, TXN_SNAPSHOT_NONE, false);
    assert(error == 0);

    LE_CURSOR cursor = NULL;
    error = toku_le_cursor_create(&cursor, brt, cursortxn);
    assert(error == 0);

    DBT key;
    toku_init_dbt(&key); key.flags = DB_DBT_REALLOC;
    DBT val;
    toku_init_dbt(&val); val.flags = DB_DBT_REALLOC;

    int i;
    for (i=0; ; i++) {
        error = le_cursor_get_next(cursor, &val);
        if (error != 0) 
            break;
        
        LEAFENTRY le = (LEAFENTRY) val.data;
        assert(le->type == LE_MVCC);
        assert(le->keylen == sizeof (int));
        int ii;
        memcpy(&ii, le->u.mvcc.key_xrs, le->keylen);
        assert((int) toku_htonl(i) == ii);
    }
    assert(i == n);

    toku_destroy_dbt(&key);
    toku_destroy_dbt(&val);

    toku_le_cursor_close(cursor);

    error = toku_txn_commit_txn(cursortxn, true, NULL, NULL);
    assert(error == 0);
    toku_txn_close_txn(cursortxn);

    error = toku_txn_commit_txn(txn, true, NULL, NULL);
    assert(error == 0);
    toku_txn_close_txn(txn);

    error = toku_close_ft_handle_nolsn(brt, NULL);
    assert(error == 0);
    CHECKPOINTER cp = toku_cachetable_get_checkpointer(ct);
    error = toku_checkpoint(cp, logger, NULL, NULL, NULL, NULL, CLIENT_CHECKPOINT);
    assert(error == 0);

    toku_logger_close_rollback(logger);
    error = toku_logger_close(&logger);
    assert(error == 0);

    toku_cachetable_close(&ct);
}

static void
init_logdir(const char *logdir) {
    int error;

    toku_os_recursive_delete(logdir);
    error = toku_os_mkdir(logdir, 0777);
    assert(error == 0);
}

int
test_main (int argc , const char *argv[]) {
    default_parse_args(argc, argv);
    toku_os_recursive_delete(TOKU_TEST_FILENAME);
    int r = toku_os_mkdir(TOKU_TEST_FILENAME, S_IRWXU);
    assert_zero(r);

    char logdir[TOKU_PATH_MAX+1];
    toku_path_join(logdir, 2, TOKU_TEST_FILENAME, "logdir");
    init_logdir(logdir);
    int error = chdir(logdir);
    assert(error == 0);

    const int n = 10;
    create_populate_tree(".", "ftfile", n);
    test_provdel(".", "ftfile", n);

    return 0;
}