/* -*- 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."

#define kv_pair_funcs 1 // pull in kv_pair generators from test.h

#include "test.h"
#include "toku_pthread.h"
#include <db.h>
#include <sys/stat.h>
#include "ydb-internal.h"

#include "test_kv_gen.h"
/*
 */

DB_ENV *env;
enum {MAX_NAME=128};
enum {ROWS_PER_TRANSACTION=10000};
int NUM_DBS=5;
int NUM_ROWS=100000;
int CHECK_RESULTS=0;
int optimize=0;
int littlenode = 0;
enum { old_default_cachesize=1024 }; // MB
int CACHESIZE=old_default_cachesize;
int ALLOW_DUPS=0;

static struct timeval starttime;
static double UU() elapsed_time (void) {
    struct timeval now;
    gettimeofday(&now, NULL);
    return now.tv_sec - starttime.tv_sec + 1e-6*(now.tv_usec - starttime.tv_usec);
}

static void preload_dbs(DB **dbs)
{
    gettimeofday(&starttime, NULL);
    int r;
    DB_TXN    *txn;

    DBT skey, sval;
    DBT key, val;
    dbt_init_realloc(&key);
    dbt_init_realloc(&val);
    unsigned int k, v;
    if ( verbose ) { printf("loading");fflush(stdout); }
    int outer_loop_num = ( NUM_ROWS <= ROWS_PER_TRANSACTION ) ? 1 : (NUM_ROWS / ROWS_PER_TRANSACTION);
    for(int x=0;x<outer_loop_num;x++) {
        r = env->txn_begin(env, NULL, &txn, 0);                                                              CKERR(r);
        for(int i=1;i<=ROWS_PER_TRANSACTION;i++) {
            k = i + (x*ROWS_PER_TRANSACTION);
            v = generate_val(k, 0);
            dbt_init(&skey, &k, sizeof(unsigned int));
            dbt_init(&sval, &v, sizeof(unsigned int));

            for(int db = 0;db < NUM_DBS;db++) {
                put_multiple_generate(dbs[db], // dest_db
                                      NULL, // src_db, ignored
                                      &key, &val, // dest_key, dest_val
                                      &skey, &sval, // src_key, src_val
                                      NULL); // extra, ignored

                r = dbs[db]->put(dbs[db], txn, &key, &val, 0);                                               CKERR(r);
                if (key.flags == 0) { dbt_init_realloc(&key); }
                if (val.flags == 0) { dbt_init_realloc(&val); }
            }
        }
        r = txn->commit(txn, 0);                                                                             CKERR(r);
        if ( verbose ) {printf(".");fflush(stdout);}
    }
    if ( key.flags ) { toku_free(key.data); key.data = NULL; }
    if ( val.flags ) { toku_free(val.data); key.data = NULL; }

    if (optimize) {
        if (verbose) { printf("\noptimizing");fflush(stdout);}
        do_hot_optimize_on_dbs(env, dbs, NUM_DBS);
    }

    if ( CHECK_RESULTS) {
        if ( verbose ) {printf("\nchecking");fflush(stdout);}
        check_results(env, dbs, NUM_DBS, NUM_ROWS);
    }
    if ( verbose) {printf("\ndone\n");fflush(stdout);}
}


char *free_me = NULL;
const char *env_dir = TOKU_TEST_FILENAME; // the default env_dir.

static void run_test(void) 
{
    int r;
    {
	int len = strlen(env_dir) + 20;
	char syscmd[len];
	r = snprintf(syscmd, len, "rm -rf %s", env_dir);
	assert(r<len);
	r = system(syscmd);                                                                                   CKERR(r);
    }
    r = toku_os_mkdir(env_dir, S_IRWXU+S_IRWXG+S_IRWXO);                                                      CKERR(r);

    r = db_env_create(&env, 0);                                                                               CKERR(r);
//    r = env->set_default_bt_compare(env, uint_dbt_cmp);                                                       CKERR(r);
//    r = env->set_default_dup_compare(env, uint_dbt_cmp);                                                      CKERR(r);
//    if ( verbose ) printf("CACHESIZE = %d MB\n", CACHESIZE);
//    r = env->set_cachesize(env, CACHESIZE / 1024, (CACHESIZE % 1024)*1024*1024, 1);                           CKERR(r);
//    CKERR(r);
    int envflags = DB_INIT_LOCK | DB_INIT_LOG | DB_INIT_MPOOL | DB_INIT_TXN | DB_CREATE | DB_PRIVATE;
    r = env->open(env, env_dir, envflags, S_IRWXU+S_IRWXG+S_IRWXO);                                            CKERR(r);
    env->set_errfile(env, stderr);
    r = env->checkpointing_set_period(env, 0);                                                                CKERR(r);

    DBT desc;
    dbt_init(&desc, "foo", sizeof("foo"));
    char name[MAX_NAME*2];

    DB **dbs = (DB**)toku_malloc(sizeof(DB*) * NUM_DBS);
    assert(dbs != NULL);
    int idx[MAX_DBS];
    for(int i=0;i<NUM_DBS;i++) {
        idx[i] = i;
        r = db_create(&dbs[i], env, 0);                                                                       CKERR(r);
	if (littlenode) {
	    r=dbs[i]->set_pagesize(dbs[i], 4096);
	    CKERR(0);	    
	}
        dbs[i]->app_private = &idx[i];
        snprintf(name, sizeof(name), "db_%04x", i);
        r = dbs[i]->open(dbs[i], NULL, name, NULL, DB_BTREE, DB_CREATE, 0666);                                CKERR(r);
        IN_TXN_COMMIT(env, NULL, txn_desc, 0, {
                { int chk_r = dbs[i]->change_descriptor(dbs[i], txn_desc, &desc, 0); CKERR(chk_r); }
        });
    }

    generate_permute_tables();

    // -------------------------- //
    preload_dbs(dbs);
    // -------------------------- //

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

    if (verbose >= 2)
	print_engine_status(env);
    r = env->close(env, 0);                                                                                   CKERR(r);
    toku_free(dbs);

    /*********** DO NOT TRIM LOGFILES: Trimming logfiles defeats purpose of upgrade tests which must handle untrimmed logfiles.
    // reopen, then close environment to trim logfiles
    r = db_env_create(&env, 0);                                                                               CKERR(r);
    r = env->open(env, env_dir, envflags, S_IRWXU+S_IRWXG+S_IRWXO);                                           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();
    if (free_me) toku_free(free_me);
    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: -h -c -n -d <num_dbs> -r <num_rows> %s\n", cmd);
	    exit(resultcode);
        } else if (strcmp(argv[0], "-d")==0) {
            argc--; argv++;
            NUM_DBS = atoi(argv[0]);
            if ( NUM_DBS > MAX_DBS ) {
                fprintf(stderr, "max value for -d field is %d\n", MAX_DBS);
                resultcode=1;
                goto do_usage;
            }
        } else if (strcmp(argv[0], "-r")==0) {
            argc--; argv++;
            NUM_ROWS = atoi(argv[0]);
        } else if (strcmp(argv[0], "-c")==0) {
            CHECK_RESULTS = 1;
        } else if (strcmp(argv[0], "-n")==0) {
            littlenode = 1;
        } else if (strcmp(argv[0], "-o")==0) {
            optimize = 1;
	} else {
	    fprintf(stderr, "Unknown arg: %s\n", argv[0]);
	    resultcode=1;
	    goto do_usage;
	}
	argc--;
	argv++;
    }
}