/* -*- 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"
#include "toku_pthread.h"
#include "key-val.h"
#include <db.h>
#include <sys/stat.h>

DB_ENV *env;
enum {NUM_DBS=1};
enum {NUM_KV_PAIRS=3};
struct kv_pair {
    int64_t key;
    int64_t val;
};
struct kv_pair kv_pairs[NUM_KV_PAIRS] = {{1,4},
                                         {2,5},
                                         {3,6}};

static void run_indexer(DB *src, DB **dbs)
{
    int r;
    DB_TXN    *txn;
    DB_INDEXER *indexer;
    uint32_t db_flags[NUM_DBS];

    if ( verbose ) printf("test_indexer\n");
    for(int i=0;i<NUM_DBS;i++) { 
        db_flags[i] = DB_NOOVERWRITE; 
    }

    // create and initialize loader
    r = env->txn_begin(env, NULL, &txn, 0);                                                               
    CKERR(r);

    if ( verbose ) printf("run_indexer create_indexer\n");
    r = env->create_indexer(env, txn, &indexer, src, NUM_DBS, dbs, db_flags, 0);
    CKERR(r);
    r = indexer->set_error_callback(indexer, NULL, NULL);
    CKERR(r);
    r = indexer->set_poll_function(indexer, poll_print, NULL);
    CKERR(r);

    if ( verbose ) printf("run_indexer build\n");
    r = indexer->build(indexer);
    CKERR(r);

    if ( verbose ) printf("run_indexer close\n");
    r = indexer->close(indexer);
    CKERR(r);
    r = txn->commit(txn, DB_TXN_SYNC);
    CKERR(r);
    
    if ( verbose ) printf("run_indexer done\n");
}

const char *src_name="src.db";

static void run_test(void) 
{
    int r;
    toku_os_recursive_delete(TOKU_TEST_FILENAME);
    r = toku_os_mkdir(TOKU_TEST_FILENAME, S_IRWXU+S_IRWXG+S_IRWXO);                          CKERR(r);
    char logname[TOKU_PATH_MAX+1];
    r = toku_os_mkdir(toku_path_join(logname, 2, TOKU_TEST_FILENAME, "log"), S_IRWXU+S_IRWXG+S_IRWXO);                   CKERR(r);

    r = db_env_create(&env, 0);                                                  CKERR(r);
    r = env->set_lg_dir(env, "log");                                             CKERR(r);
    r = env->set_default_bt_compare(env, int64_dbt_cmp);                         CKERR(r);
    r = env->set_generate_row_callback_for_put(env, put_multiple_generate_switch);      CKERR(r);
    int envflags = DB_INIT_LOCK | DB_INIT_LOG | DB_INIT_MPOOL | DB_INIT_TXN | DB_CREATE | DB_PRIVATE | DB_INIT_LOG;
    r = env->open(env, TOKU_TEST_FILENAME, envflags, S_IRWXU+S_IRWXG+S_IRWXO);               CKERR(r);
    db_env_enable_engine_status(0);  // disable engine status on crash
    env->set_errfile(env, stderr);
    //Disable auto-checkpointing
    r = env->checkpointing_set_period(env, 0);                                   CKERR(r);

    DB *src_db = NULL;
    r = db_create(&src_db, env, 0);                                                             CKERR(r);
    r = src_db->open(src_db, NULL, src_name, NULL, DB_BTREE, DB_AUTO_COMMIT|DB_CREATE, 0666);   CKERR(r);
    DBT key, val;
    DB_TXN *txn;
    r = env->txn_begin(env, NULL, &txn, 0);                                      CKERR(r);
    for(int i=0;i<NUM_KV_PAIRS;i++) {
        dbt_init(&key, &kv_pairs[i].key, sizeof(kv_pairs[i].key));
        dbt_init(&val, &kv_pairs[i].val, sizeof(kv_pairs[i].val));
        r = src_db->put(src_db, txn, &key, &val, 0);                             CKERR(r);
    }

    DB *dbs[NUM_DBS];
    for (int i = 0; i < NUM_DBS; i++) {
        r = db_create(&dbs[i], env, 0); CKERR(r);
        char key_name[32]; 
        sprintf(key_name, "key%d", i);
        r = dbs[i]->open(dbs[i], NULL, key_name, NULL, DB_BTREE, DB_AUTO_COMMIT|DB_CREATE, 0666);   CKERR(r);
        dbs[i]->app_private = (void *) (intptr_t) i;
    }

    run_indexer(src_db, dbs);

    // at this point the hot dictionary should have locks on the rows since the transaction 
    //   that created the src dictionary is still open

    // try overwriting a value in hot dictionary[0]
    {
        DB_TXN *owrt_txn;
        r = env->txn_begin(env, NULL, &owrt_txn, 0); 
        CKERR(r);
        
        dbt_init(&key, &kv_pairs[0].key, sizeof(kv_pairs[0].key));
        dbt_init(&key, &kv_pairs[0].val, sizeof(kv_pairs[0].val));
        r = dbs[0]->put(dbs[0], owrt_txn, &key, &val, 0);

        assert(r == DB_LOCK_NOTGRANTED );
        if ( verbose ) printf("lock contention detected, as expected ( put returns DB_LOCK_NOTGRANTED )\n");

        r = owrt_txn->commit(owrt_txn, DB_TXN_SYNC); 
        CKERR(r);
    }

    // close the transaction (releasing locks), and try writing again 
    r = txn->commit(txn, DB_TXN_SYNC);
    CKERR(r);
    {
        DB_TXN *owrt_txn;
        r = env->txn_begin(env, NULL, &owrt_txn, 0); 
        CKERR(r);
        
        dbt_init(&key, &kv_pairs[0].key, sizeof(kv_pairs[0].key));
        dbt_init(&key, &kv_pairs[0].val, sizeof(kv_pairs[0].val));
        r = dbs[0]->put(dbs[0], owrt_txn, &key, &val, 0);

        assert(r == 0 );
        if ( verbose ) printf("no lock contention detected, as expected ( put returns 0 )\n");

        r = owrt_txn->commit(owrt_txn, DB_TXN_SYNC); 
        CKERR(r);
    }


    if ( verbose ) printf("PASS\n");

    for(int i=0;i<NUM_DBS;i++) {
        r = dbs[i]->close(dbs[i], 0);                                            CKERR(r);
    }

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


// ------------ infrastructure ----------
static void do_args(int argc, char * const argv[]);

int test_main(int argc, char * const *argv) {
    do_args(argc, argv);
    run_test();
    return 0;
}

static void do_args(int argc, char * const argv[]) {
    int resultcode;
    char *cmd = argv[0];
    argc--; argv++;
    while (argc>0) {
	if (strcmp(argv[0], "-v")==0) {
	    verbose++;
	} else if (strcmp(argv[0],"-q")==0) {
	    verbose--;
	    if (verbose<0) verbose=0;
        } else if (strcmp(argv[0], "-h")==0) {
	    resultcode=0;
	do_usage:
	    fprintf(stderr, "Usage:\n%s\n", cmd);
	    exit(resultcode);
	} else {
	    fprintf(stderr, "Unknown arg: %s\n", argv[0]);
	    resultcode=1;
	    goto do_usage;
	}
	argc--;
	argv++;
    }
}