/* -*- mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*- */
// vim: ft=cpp:expandtab:ts=8:sw=4:softtabstop=4:
#ident "$Id$"
#ident "Copyright (c) 2007-2012 Tokutek Inc.  All rights reserved."
#ident "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."
#include "test.h"

// verify that deletes on single dictionaries delete the correct key and create the correct lock

static void
verify_locked(DB_ENV *env, DB *db, int k) {
    int r;
    DB_TXN *txn = NULL;
    r = env->txn_begin(env, NULL, &txn, 0); assert_zero(r);
    DBT key; dbt_init(&key, &k, sizeof k);
    r = db->del(db, txn, &key, DB_DELETE_ANY); assert(r == DB_LOCK_NOTGRANTED);
    r = txn->abort(txn); assert_zero(r);
}

static void
verify_empty(DB_ENV *env, DB *db) {
    int r;
    DB_TXN *txn = NULL;
    r = env->txn_begin(env, NULL, &txn, 0); assert_zero(r);

    DBC *cursor = NULL;
    r = db->cursor(db, txn, &cursor, 0); assert_zero(r);
    int i;
    for (i = 0; ; i++) {
        DBT key; memset(&key, 0, sizeof key);
        DBT val; memset(&val, 0, sizeof val);
        r = cursor->c_get(cursor, &key, &val, DB_NEXT);
        if (r != 0)
            break;
    }
    assert_zero(i);
    r = cursor->c_close(cursor); assert_zero(r);
    r = txn->commit(txn, 0); assert_zero(r);
}

static void
verify_del(DB_ENV *env, DB *db, int nrows) {
    int r;
    DB_TXN *deltxn = NULL;
    r = env->txn_begin(env, NULL, &deltxn, 0); assert_zero(r);
    for (int i = 0; i < nrows; i++) {
        int k = htonl(i);
        DBT key; dbt_init(&key, &k, sizeof k);
        r = db->del(db, deltxn, &key, DB_DELETE_ANY); assert_zero(r);
        verify_locked(env, db, k);
    }
    r = deltxn->commit(deltxn, 0); assert_zero(r);
    verify_empty(env, db);
}

static void
test_del(int nrows) {
    int r;
    DB_ENV *env = NULL;
    r = db_env_create(&env, 0); assert_zero(r);

    r = env->open(env, ENVDIR, DB_INIT_MPOOL|DB_CREATE|DB_THREAD |DB_INIT_LOCK|DB_INIT_LOG|DB_INIT_TXN|DB_PRIVATE, S_IRWXU+S_IRWXG+S_IRWXO); assert_zero(r);

    DB *db = NULL;
    r = db_create(&db, env, 0); assert_zero(r);

    r = db->open(db, NULL, "test.db", NULL, DB_BTREE, DB_AUTO_COMMIT+DB_CREATE, S_IRWXU+S_IRWXG+S_IRWXO); assert_zero(r);

    DB_TXN *txn = NULL;
    r = env->txn_begin(env, NULL, &txn, 0); assert_zero(r);

    // populate
    for (int i = 0; i < nrows; i++) {
        int k = htonl(i);
        int v = i;
        DBT key; dbt_init(&key, &k, sizeof k);
        DBT val; dbt_init(&val, &v, sizeof v);
        r = db->put(db, txn, &key, &val, 0); assert_zero(r);
    }

    r = txn->commit(txn, 0); assert_zero(r);

    verify_del(env, db, nrows);

    r = db->close(db, 0); assert_zero(r);

    r = env->close(env, 0); assert_zero(r);
}

int
test_main(int argc, char * const argv[]) {
    int r;
    int nrows = 2;

    // parse_args(argc, argv);
    for (int i = 1; i < argc; i++) {
        char * const arg = argv[i];
        if (strcmp(arg, "-v") == 0) {
            verbose++;
            continue;
        }
        if (strcmp(arg, "-q") == 0) {
            verbose = 0;
            continue;
        }
        if (strcmp(arg, "--nrows") == 0 && i+1 < argc) {
            nrows = atoi(argv[++i]);
            continue;
        }
    }

    r = system("rm -rf " ENVDIR); assert_zero(r);
    r = toku_os_mkdir(ENVDIR, S_IRWXU+S_IRWXG+S_IRWXO); assert_zero(r);

    test_del(nrows);

    return 0;
}

