/* -*- mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*- */
// vim: ft=cpp:expandtab:ts=8:sw=4:softtabstop=4:
#ident "$Id$"
/*======
This file is part of PerconaFT.


Copyright (c) 2006, 2015, Percona and/or its affiliates. All rights reserved.

    PerconaFT is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License, version 2,
    as published by the Free Software Foundation.

    PerconaFT 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.

    You should have received a copy of the GNU General Public License
    along with PerconaFT.  If not, see <http://www.gnu.org/licenses/>.

----------------------------------------

    PerconaFT is free software: you can redistribute it and/or modify
    it under the terms of the GNU Affero General Public License, version 3,
    as published by the Free Software Foundation.

    PerconaFT 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 Affero General Public License for more details.

    You should have received a copy of the GNU Affero General Public License
    along with PerconaFT.  If not, see <http://www.gnu.org/licenses/>.
======= */

#ident "Copyright (c) 2006, 2015, Percona and/or its affiliates. All rights reserved."

#include "test.h"

// verify that update_multiple where we change the data in row[i] col[j] from x to x+1

static int
get_key(int i, int dbnum) {
    return htonl(2*(i + dbnum));
}

static int
get_new_key(int i, int dbnum) {
    return htonl(2*(i + dbnum) + 1);
}

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

static void
get_new_data(int *v, int i, int ndbs) {
    for (int dbnum = 0; dbnum < ndbs; dbnum++) {
        if ((i % ndbs) == dbnum)
            v[dbnum] = get_new_key(i, dbnum);
        else
            v[dbnum] = get_key(i, dbnum);
    }
}

static int
put_callback(DB *dest_db, DB *src_db, DBT_ARRAY *dest_key_arrays, DBT_ARRAY *dest_val_arrays, const DBT *src_key, const DBT *src_val) {
    toku_dbt_array_resize(dest_key_arrays, 1);
    DBT *dest_key = &dest_key_arrays->dbts[0];
    DBT *dest_val = NULL;
    if (dest_val_arrays) {
        toku_dbt_array_resize(dest_val_arrays, 1);
        dest_val = &dest_val_arrays->dbts[0];
    }

    (void) dest_db; (void) src_db; (void) dest_key; (void) dest_val; (void) src_key; (void) src_val;

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

    int *pri_key = (int *) src_key->data;
    int *pri_data = (int *) src_val->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_val) {
        switch (dest_val->flags) {
        case 0:
            if (dbnum == 0) {
                dest_val->size = src_val->size;
                dest_val->data = src_val->data;
            } else
                dest_val->size = 0;
            break;
        case DB_DBT_REALLOC:
            if (dbnum == 0) {
                dest_val->size = src_val->size;
                dest_val->data = toku_realloc(dest_val->data, dest_val->size);
                memcpy(dest_val->data, src_val->data, dest_val->size);
            } else
                dest_val->size = 0;
            break;
        default:
            assert(0);
        }
    }
    
    return 0;
}

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

#if 0
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);
}
#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;
        if (dbnum == 0 || (i % ndbs) != dbnum)
            expectk = get_key(i, dbnum);
        else
            expectk = get_new_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_new_data(v, i, ndbs);
            assert(memcmp(val.data, v, val.size) == 0);
        } else
            assert(val.size == 0);
    }
    assert(i == nrows); // if (i != nrows) printf("%s:%d %d %d\n", __FUNCTION__, __LINE__, i, nrows); // assert(i == nrows);
    r = cursor->c_close(cursor); assert_zero(r);
    r = txn->commit(txn, 0); assert_zero(r);
}

static void
update_diagonal(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 the data i % ndbs col from x to x+1

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

        int v[ndbs]; get_data(v, i, ndbs);
        DBT old_data; dbt_init(&old_data, &v[0], sizeof v);
        
        int newv[ndbs]; get_new_data(newv, i, ndbs);
        DBT new_data; dbt_init(&new_data, &newv[0], sizeof newv);
  
        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_test_no_array(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);
    }
    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-1; dbnum++) {
        if (dbnum == 0)
            populate_primary(env, db[dbnum], ndbs, nrows);
        else
            populate_secondary(env, db[dbnum], dbnum, nrows);
    }

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

    DB_INDEXER *indexer = NULL;
    uint32_t db_flags = 0;
    r = env->create_indexer(env, indexer_txn, &indexer, db[0], 1, &db[ndbs-1], &db_flags, 0); assert_zero(r);

    update_diagonal(env, db, ndbs, nrows);

    r = indexer->build(indexer); assert_zero(r);
    r = indexer->close(indexer); assert_zero(r);

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

    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;
}