/* -*- 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 update_multiple where we only change key0

static int
get_key(int i, int dbnum) {
    return htonl(i + dbnum);
}

static void
get_data(int *v, int i, int ndbs) {
    for (int dbnum = 0; dbnum < ndbs; dbnum++) {
        v[dbnum] = get_key(i, dbnum);
    }
}

static int
put_callback(DB *dest_db, DB *src_db, DBT *dest_key, DBT *dest_data, const DBT *src_key, const DBT *src_data) {
    (void) dest_db; (void) src_db; (void) dest_key; (void) dest_data; (void) src_key; (void) src_data;

    unsigned int dbnum;
    assert(dest_db->descriptor->dbt.size == sizeof dbnum);
    memcpy(&dbnum, dest_db->descriptor->dbt.data, sizeof dbnum);
    assert(dbnum < src_data->size / sizeof (int));

    int *pri_key = (int *) src_key->data;
    int *pri_data = (int *) src_data->data;

    switch (dest_key->flags) {
    case 0:
        dest_key->size = sizeof (int);
        dest_key->data = dbnum == 0 ? &pri_key[dbnum] : &pri_data[dbnum];
        break;
    case DB_DBT_REALLOC:
        dest_key->size = sizeof (int);
        dest_key->data = toku_realloc(dest_key->data, dest_key->size);
        memcpy(dest_key->data, dbnum == 0 ? &pri_key[dbnum] : &pri_data[dbnum], dest_key->size);
        break;
    default:
        assert(0);
    }

    if (dest_data) {
        switch (dest_data->flags) {
        case 0:
            if (dbnum == 0) {
                dest_data->size = src_data->size;
                dest_data->data = src_data->data;
            } else
                dest_data->size = 0;
            break;
        case DB_DBT_REALLOC:
            if (dbnum == 0) {
                dest_data->size = src_data->size;
                dest_data->data = toku_realloc(dest_data->data, dest_data->size);
                memcpy(dest_data->data, src_data->data, dest_data->size);
            } else
                dest_data->size = 0;
            break;
        default:
            assert(0);
        }
    }
    
    return 0;
}

static int
del_callback(DB *dest_db, DB *src_db, DBT *dest_key, const DBT *src_key, const DBT *src_data) {
    return put_callback(dest_db, src_db, dest_key, NULL, src_key, src_data);
}

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);
}

#if 0
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);
}
#endif

static void
verify_seq(DB_ENV *env, DB *db, int dbnum, int ndbs, int nrows) {
    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;
        int k;
        int expectk = dbnum == 0 ? get_key(i + nrows, dbnum) : get_key(i, dbnum);
        assert(key.size == sizeof k);
        memcpy(&k, key.data, key.size);
        assert(k == expectk);

        if (dbnum == 0) {
            assert(val.size == ndbs * sizeof (int));
            int v[ndbs]; get_data(v, i, ndbs);
            assert(memcmp(val.data, v, val.size) == 0);
        } else
            assert(val.size == 0);
    }
    assert(i == nrows);
    r = cursor->c_close(cursor); assert_zero(r);
    r = txn->commit(txn, 0); assert_zero(r);
}

static void
update_key0(DB_ENV *env, DB *db[], int ndbs, int nrows) {
    assert(ndbs > 0);
    int r;
    DB_TXN *txn = NULL;
    r = env->txn_begin(env, NULL, &txn, 0); assert_zero(r);
    for (int i = 0; i < nrows; i++) {

        // update where new key0 = old key0 + nrows

        int k = get_key(i, 0);
        DBT old_key; dbt_init(&old_key, &k, sizeof k);
        int newk = get_key(i + nrows, 0);
        DBT new_key; dbt_init(&new_key, &newk, sizeof newk);

        int v[ndbs]; get_data(v, i, ndbs);
        DBT old_data; dbt_init(&old_data, &v[0], sizeof v);
        DBT new_data = old_data;
      
        int ndbts = 2 * ndbs;
        DBT keys[ndbts]; memset(keys, 0, sizeof keys);
        DBT vals[ndbts]; memset(vals, 0, sizeof vals);
        uint32_t flags_array[ndbs]; memset(flags_array, 0, sizeof(flags_array));

        r = env->update_multiple(env, ndbs > 0 ? db[0] : NULL, txn, &old_key, &old_data, &new_key, &new_data, ndbs, db, flags_array, ndbts, keys, ndbts, vals);
        assert_zero(r);

        verify_locked(env, db[0], k);
        verify_locked(env, db[0], newk);
    }
    r = txn->commit(txn, 0); assert_zero(r);
}

static void
populate_primary(DB_ENV *env, DB *db, int ndbs, int nrows) {
    int 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 = get_key(i, 0);
        int v[ndbs]; get_data(v, i, ndbs);
        DBT key; dbt_init(&key, &k, sizeof k);
        DBT val; dbt_init(&val, &v[0], sizeof v);
        r = db->put(db, txn, &key, &val, 0); assert_zero(r);
    }

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

static void
populate_secondary(DB_ENV *env, DB *db, int dbnum, int nrows) {
    int 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 = get_key(i, dbnum);
        DBT key; dbt_init(&key, &k, sizeof k);
        DBT val; dbt_init(&val, NULL, 0);
        r = db->put(db, txn, &key, &val, 0); assert_zero(r);
    }

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

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

    r = env->set_generate_row_callback_for_put(env, put_callback); assert_zero(r);
    r = env->set_generate_row_callback_for_del(env, del_callback); assert_zero(r);

    r = env->open(env, TOKU_TEST_FILENAME, 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[ndbs];
    for (int dbnum = 0; dbnum < ndbs; dbnum++) {
        r = db_create(&db[dbnum], env, 0); assert_zero(r);

        DBT dbt_dbnum; dbt_init(&dbt_dbnum, &dbnum, sizeof dbnum);
        char dbname[32]; sprintf(dbname, "%d.tdb", dbnum);
        r = db[dbnum]->open(db[dbnum], NULL, dbname, NULL, DB_BTREE, DB_AUTO_COMMIT+DB_CREATE, S_IRWXU+S_IRWXG+S_IRWXO); assert_zero(r);
        IN_TXN_COMMIT(env, NULL, txn_desc, 0, {
                { int chk_r = db[dbnum]->change_descriptor(db[dbnum], txn_desc, &dbt_dbnum, 0); CKERR(chk_r); }
        });
    }

    for (int dbnum = 0; dbnum < ndbs; dbnum++) {
        if (dbnum == 0)
            populate_primary(env, db[dbnum], ndbs, nrows);
        else
            populate_secondary(env, db[dbnum], dbnum, nrows);
    }

    update_key0(env, db, ndbs, nrows);
    for (int dbnum = 0; dbnum < ndbs; dbnum++) 
        verify_seq(env, db[dbnum], dbnum, ndbs, nrows);

    for (int dbnum = 0; dbnum < ndbs; dbnum++) 
        r = db[dbnum]->close(db[dbnum], 0); assert_zero(r);

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

int
test_main(int argc, char * const argv[]) {
    int r;
    int ndbs = 2;
    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, "--ndbs") == 0 && i+1 < argc) {
            ndbs = atoi(argv[++i]);
            continue;
        }
        if (strcmp(arg, "--nrows") == 0 && i+1 < argc) {
            nrows = atoi(argv[++i]);
            continue;
        }
    }

    toku_os_recursive_delete(TOKU_TEST_FILENAME);
    r = toku_os_mkdir(TOKU_TEST_FILENAME, S_IRWXU+S_IRWXG+S_IRWXO); assert_zero(r);

    run_test(ndbs, nrows);

    return 0;
}

