/* -*- 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 recovery of an update log entry which changes values at keys

static const int envflags = DB_INIT_MPOOL|DB_CREATE|DB_THREAD|DB_INIT_LOCK|DB_INIT_LOG|DB_INIT_TXN|DB_PRIVATE;
uint32_t four_byte_desc = 101;
uint64_t eight_byte_desc = 10101;

static void assert_desc_four (DB* db) {
    assert(db->descriptor->dbt.size == sizeof(four_byte_desc));
    assert(*(uint32_t *)(db->descriptor->dbt.data) == four_byte_desc);
}
static void assert_desc_eight (DB* db) {
    assert(db->descriptor->dbt.size == sizeof(eight_byte_desc));
    assert(*(uint32_t *)(db->descriptor->dbt.data) == eight_byte_desc);
}

bool do_crash;

static void checkpoint_callback_1(void * extra) {
    assert(extra == NULL);
    if (do_crash) {
       toku_hard_crash_on_purpose();
    }
}

static void run_test(void)
{
    DB_ENV *env;
    DB *db;
    DB *db2;
    DB *db3;
    DB_TXN* txn;
    DB_TXN* txn2;
    DB_TXN* txn3;
    DBT desc;

    do_crash = false;
    
    memset(&desc, 0, sizeof(desc));
    desc.size = sizeof(four_byte_desc);
    desc.data = &four_byte_desc;

    DBT other_desc;
    memset(&other_desc, 0, sizeof(other_desc));
    other_desc.size = sizeof(eight_byte_desc);
    other_desc.data = &eight_byte_desc;

    toku_os_recursive_delete(TOKU_TEST_FILENAME);
    { int chk_r = toku_os_mkdir(TOKU_TEST_FILENAME, S_IRWXU+S_IRWXG+S_IRWXO); CKERR(chk_r); }
    { int chk_r = db_env_create(&env, 0); CKERR(chk_r); }
    db_env_set_checkpoint_callback(checkpoint_callback_1, NULL);
    env->set_errfile(env, stderr);
    { int chk_r = env->open(env, TOKU_TEST_FILENAME, envflags, S_IRWXU+S_IRWXG+S_IRWXO); CKERR(chk_r); }

    IN_TXN_COMMIT(env, NULL, txn_1, 0, {
            { int chk_r = db_create(&db, env, 0); CKERR(chk_r); }
            { int chk_r = db->open(db, txn_1, "foo.db", NULL, DB_BTREE, DB_CREATE, 0666); CKERR(chk_r); }
        });
    IN_TXN_COMMIT(env, NULL, txn_2, 0, {
            { int chk_r = db_create(&db2, env, 0); CKERR(chk_r); }
            { int chk_r = db2->open(db2, txn_2, "foo2.db", NULL, DB_BTREE, DB_CREATE, 0666); CKERR(chk_r); }
            { int chk_r = db2->change_descriptor(db2, txn_2, &other_desc, 0); CKERR(chk_r); }
            assert_desc_eight(db2);
        });
    IN_TXN_COMMIT(env, NULL, txn_3, 0, {
            { int chk_r = db_create(&db3, env, 0); CKERR(chk_r); }
            { int chk_r = db3->open(db3, txn_3, "foo3.db", NULL, DB_BTREE, DB_CREATE, 0666); CKERR(chk_r); }
            { int chk_r = db3->change_descriptor(db3, txn_3, &other_desc, 0); CKERR(chk_r); }
            assert_desc_eight(db3);
        });
    
    { int chk_r = env->txn_begin(env, NULL, &txn, 0); CKERR(chk_r); }
    { int chk_r = db->change_descriptor(db, txn, &desc, 0); CKERR(chk_r); }
    { int chk_r = txn->commit(txn,0); CKERR(chk_r); }

    { int chk_r = env->txn_begin(env, NULL, &txn2, 0); CKERR(chk_r); }
    { int chk_r = db2->change_descriptor(db2, txn2, &desc, 0); CKERR(chk_r); }
    { int chk_r = txn2->abort(txn2); CKERR(chk_r); }

    { int chk_r = env->txn_begin(env, NULL, &txn3, 0); CKERR(chk_r); }
    { int chk_r = db3->change_descriptor(db3, txn3, &desc, 0); CKERR(chk_r); }

    do_crash = true;
    env->txn_checkpoint(env,0,0,0);
}


static void run_recover(void)
{
    DB_ENV *env;
    DB *db;
    DB *db2;
    DB *db3;

    { int chk_r = db_env_create(&env, 0); CKERR(chk_r); }
    env->set_errfile(env, stderr);
    { int chk_r = env->open(env, TOKU_TEST_FILENAME, envflags|DB_RECOVER, S_IRWXU+S_IRWXG+S_IRWXO); CKERR(chk_r); }

    { int chk_r = db_create(&db, env, 0); CKERR(chk_r); }
    { int chk_r = db->open(db, NULL, "foo.db", NULL, DB_BTREE, DB_AUTO_COMMIT, 0666); CKERR(chk_r); }
    assert_desc_four(db);
    { int chk_r = db->close(db, 0); CKERR(chk_r); }

    { int chk_r = db_create(&db2, env, 0); CKERR(chk_r); }
    { int chk_r = db2->open(db2, NULL, "foo2.db", NULL, DB_BTREE, DB_AUTO_COMMIT, 0666); CKERR(chk_r); }
    assert_desc_eight(db2);
    { int chk_r = db2->close(db2, 0); CKERR(chk_r); }

    { int chk_r = db_create(&db3, env, 0); CKERR(chk_r); }
    { int chk_r = db3->open(db3, NULL, "foo3.db", NULL, DB_BTREE, DB_AUTO_COMMIT, 0666); CKERR(chk_r); }
    assert_desc_eight(db3);
    { int chk_r = db3->close(db3, 0); CKERR(chk_r); }

    { int chk_r = env->close(env, 0); CKERR(chk_r); }
}

static int usage(void)
{
    return 1;
}

int test_main(int argc, char * const argv[])
{
    bool do_test = false;
    bool do_recover = false;

    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--;
            if (verbose < 0)
                verbose = 0;
            continue;
        }
        if (strcmp(arg, "--test") == 0) {
            do_test = true;
            continue;
        }
        if (strcmp(arg, "--recover") == 0) {
            do_recover = true;
            continue;
        }
        if (strcmp(arg, "--help") == 0) {
            return usage();
        }
    }

    if (do_test) {
        run_test();
    }
    if (do_recover) {
        run_recover();
    }

    return 0;
}
