/* -*- 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) 2010 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"

#include "toku_os.h"
#include "checkpoint.h"

#define ENVDIR TOKU_TEST_FILENAME
#include "test-ft-txns.h"

static void do_txn(TOKULOGGER logger, bool readonly) {
    int r;
    TOKUTXN txn;
    r = toku_txn_begin_txn((DB_TXN*)NULL, (TOKUTXN)0, &txn, logger, TXN_SNAPSHOT_NONE);
    CKERR(r);

    if (!readonly) {
        toku_maybe_log_begin_txn_for_write_operation(txn);
    }
    r = toku_txn_commit_txn(txn, false, NULL, NULL);
    CKERR(r);

    toku_txn_close_txn(txn);
}

static void test_xid_lsn_independent(int N) {
    TOKULOGGER logger;
    CACHETABLE ct;
    int r;

    test_setup(TOKU_TEST_FILENAME, &logger, &ct);

    FT_HANDLE brt;

    TOKUTXN txn;
    r = toku_txn_begin_txn((DB_TXN*)NULL, (TOKUTXN)0, &txn, logger, TXN_SNAPSHOT_NONE);
    CKERR(r);

    r = toku_open_ft_handle("ftfile", 1, &brt, 1024, 256, TOKU_DEFAULT_COMPRESSION_METHOD, ct, txn, toku_builtin_compare_fun);
    CKERR(r);

    r = toku_txn_commit_txn(txn, false, NULL, NULL);
    CKERR(r);
    toku_txn_close_txn(txn);

    r = toku_txn_begin_txn((DB_TXN*)NULL, (TOKUTXN)0, &txn, logger, TXN_SNAPSHOT_NONE);
    CKERR(r);
    TXNID xid_first = txn->txnid.parent_id64;
    unsigned int rands[N];
    for (int i=0; i<N; i++) {
        char key[100],val[300];
        DBT k, v;
        rands[i] = random();
        snprintf(key, sizeof(key), "key%x.%x", rands[i], i);
        memset(val, 'v', sizeof(val));
        val[sizeof(val)-1]=0;
        toku_ft_insert(brt, toku_fill_dbt(&k, key, 1+strlen(key)), toku_fill_dbt(&v, val, 1+strlen(val)), txn);
    }
    {
        TOKUTXN txn2;
        r = toku_txn_begin_txn((DB_TXN*)NULL, (TOKUTXN)0, &txn2, logger, TXN_SNAPSHOT_NONE);
    CKERR(r);
        // Verify the txnid has gone up only by one (even though many log entries were done)
        invariant(txn2->txnid.parent_id64 == xid_first + 1);
        r = toku_txn_commit_txn(txn2, false, NULL, NULL);
    CKERR(r);
        toku_txn_close_txn(txn2);
    }
    r = toku_txn_commit_txn(txn, false, NULL, NULL);
    CKERR(r);
    toku_txn_close_txn(txn);
    {
        //TODO(yoni) #5067 will break this portion of the test. (End ids are also assigned, so it would increase by 4 instead of 2.)
        // Verify the txnid has gone up only by two (even though many log entries were done)
        TOKUTXN txn3;
        r = toku_txn_begin_txn((DB_TXN*)NULL, (TOKUTXN)0, &txn3, logger, TXN_SNAPSHOT_NONE);
    CKERR(r);
        invariant(txn3->txnid.parent_id64 == xid_first + 2);
        r = toku_txn_commit_txn(txn3, false, NULL, NULL);
    CKERR(r);
        toku_txn_close_txn(txn3);
    }
    CHECKPOINTER cp = toku_cachetable_get_checkpointer(ct);
    r = toku_checkpoint(cp, logger, NULL, NULL, NULL, NULL, CLIENT_CHECKPOINT);
    CKERR(r);
    r = toku_close_ft_handle_nolsn(brt, NULL);
    CKERR(r);

    clean_shutdown(&logger, &ct);
}

static TXNID
logger_get_last_xid(TOKULOGGER logger) {
    TXN_MANAGER mgr = toku_logger_get_txn_manager(logger);
    return toku_txn_manager_get_last_xid(mgr);
}

static void test_xid_lsn_independent_crash_recovery(int N) {
    TOKULOGGER logger;
    CACHETABLE ct;
    int r;

    test_setup(TOKU_TEST_FILENAME, &logger, &ct);

    for (int i=0; i < N - 1; i++) {
        do_txn(logger, true);
    }
    do_txn(logger, false);

    TXNID last_xid_before = logger_get_last_xid(logger);

    toku_logger_close_rollback(logger);

    toku_cachetable_close(&ct);
    // "Crash"
    r = toku_logger_close(&logger);
    CKERR(r);
    ct = NULL;
    logger = NULL;

    // "Recover"
    test_setup_and_recover(TOKU_TEST_FILENAME, &logger, &ct);

    TXNID last_xid_after = logger_get_last_xid(logger);

    invariant(last_xid_after == last_xid_before);

    shutdown_after_recovery(&logger, &ct);
}

static void test_xid_lsn_independent_shutdown_recovery(int N) {
    TOKULOGGER logger;
    CACHETABLE ct;
    test_setup(TOKU_TEST_FILENAME, &logger, &ct);

    for (int i=0; i < N - 1; i++) {
        do_txn(logger, true);
    }
    do_txn(logger, false);

    TXNID last_xid_before = logger_get_last_xid(logger);

    clean_shutdown(&logger, &ct);

    // Did a clean shutdown.

    // "Recover"
    test_setup_and_recover(TOKU_TEST_FILENAME, &logger, &ct);

    TXNID last_xid_after = logger_get_last_xid(logger);

    invariant(last_xid_after == last_xid_before);

    shutdown_after_recovery(&logger, &ct);
}

static void test_xid_lsn_independent_parents(int N) {
    TOKULOGGER logger;
    CACHETABLE ct;
    int r;

    // Lets txns[-1] be NULL
    TOKUTXN txns_hack[N+1];
    TOKUTXN *txns=&txns_hack[1];

    int num_non_cascade = N;
    do {
        test_setup(TOKU_TEST_FILENAME, &logger, &ct);
        ZERO_ARRAY(txns_hack);

        for (int i = 0; i < N; i++) {
            r = toku_txn_begin_txn((DB_TXN*)NULL, txns[i-1], &txns[i], logger, TXN_SNAPSHOT_NONE);
            CKERR(r);

            if (i < num_non_cascade) {
                toku_maybe_log_begin_txn_for_write_operation(txns[i]);
                invariant(txns[i]->begin_was_logged);
            }
            else {
                invariant(!txns[i]->begin_was_logged);
            }
        }
        for (int i = 0; i < N; i++) {
            if (i < num_non_cascade) {
                toku_maybe_log_begin_txn_for_write_operation(txns[i]);
                invariant(txns[i]->begin_was_logged);
            }
            else {
                invariant(!txns[i]->begin_was_logged);
            }
        }
        toku_maybe_log_begin_txn_for_write_operation(txns[N-1]);
        for (int i = 0; i < N; i++) {
            invariant(txns[i]->begin_was_logged);
        }
        for (int i = N-1; i >= 0; i--) {
            r = toku_txn_commit_txn(txns[i], false, NULL, NULL);
            CKERR(r);

            toku_txn_close_txn(txns[i]);
        }
        clean_shutdown(&logger, &ct);

        num_non_cascade /= 2;
    } while (num_non_cascade > 0);
}

int test_main (int argc, const char *argv[]) {
    default_parse_args(argc, argv);
    for (int i=1; i<=128; i *= 2) {
        test_xid_lsn_independent(i);
        test_xid_lsn_independent_crash_recovery(i);
        test_xid_lsn_independent_shutdown_recovery(i);
        test_xid_lsn_independent_parents(i);
    }
    return 0;
}
