/* -*- 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."

// verify that the comparison function get a valid db object pointer

#include <sys/stat.h>
#include "test.h"


char descriptor_contents[] = "Spoon full of sugar";

const int envflags = DB_INIT_MPOOL|DB_CREATE|DB_THREAD |DB_INIT_LOCK|DB_INIT_LOG|DB_INIT_TXN|DB_PRIVATE;
const char *namea="a.db";
const char *nameb="b.db";

static int my_compare(DB *UU(db), const DBT *a, const DBT *b) {
    assert(db);
    assert(db->cmp_descriptor);
    assert(db->cmp_descriptor->dbt.size == sizeof(descriptor_contents));
    assert(memcmp(db->cmp_descriptor->dbt.data, descriptor_contents, sizeof(descriptor_contents)) == 0);

    assert(a->size == b->size);
    return memcmp(a->data, b->data, a->size);
}   

static void
change_descriptor(DB_ENV* env, DB* db) {
    DBT descriptor;
    dbt_init(&descriptor, descriptor_contents, sizeof(descriptor_contents));
    IN_TXN_COMMIT(env, NULL, txn_desc, 0, {
            { int chk_r = db->change_descriptor(db, txn_desc, &descriptor, DB_UPDATE_CMP_DESCRIPTOR); CKERR(chk_r); }
      });
}

static void
do_x1_shutdown (bool do_commit, bool do_abort) {
    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 datadir[TOKU_PATH_MAX+1];
    r = toku_os_mkdir(toku_path_join(datadir, 2, TOKU_TEST_FILENAME, "data"), S_IRWXU+S_IRWXG+S_IRWXO); CKERR(r);
    DB_ENV *env;
    DB *dba, *dbb;
    r = db_env_create(&env, 0);                                                         CKERR(r);
    r = env->set_data_dir(env, "data");                                                 CKERR(r);
    r = env->set_default_bt_compare(env, my_compare);                                   CKERR(r);
    r = env->open(env, TOKU_TEST_FILENAME, envflags, S_IRWXU+S_IRWXG+S_IRWXO);                      CKERR(r);
    r = db_create(&dba, env, 0);                                                        CKERR(r);
    r = dba->open(dba, NULL, namea, NULL, DB_BTREE, DB_AUTO_COMMIT|DB_CREATE, 0666);    CKERR(r);
    change_descriptor(env, dba);
    r = db_create(&dbb, env, 0);                                                        CKERR(r);
    r = dbb->open(dbb, NULL, nameb, NULL, DB_BTREE, DB_AUTO_COMMIT|DB_CREATE, 0666);    CKERR(r);
    DB_TXN *txn;
    change_descriptor(env, dbb);
    r = env->txn_begin(env, NULL, &txn, 0);                                             CKERR(r);
    {
        DBT a,b;
        dbt_init(&a, "a", 2);
        dbt_init(&b, "b", 2);
	r = dba->put(dba, txn, &a, &b, 0);                                              CKERR(r);
	r = dba->put(dba, txn, &b, &a, 0);                                              CKERR(r);
	r = dbb->put(dbb, txn, &b, &a, 0);                                              CKERR(r);
    }
    //printf("opened\n");
    if (do_commit) {
	r = txn->commit(txn, 0);                                                        CKERR(r);
    } else if (do_abort) {
        r = txn->abort(txn);                                                            CKERR(r);
        
        // force an fsync of the log
        r = env->txn_begin(env, NULL, &txn, 0);                                         CKERR(r);
        r = txn->commit(txn, 0);                                                        CKERR(r);
    }
    //printf("shutdown\n");
    toku_hard_crash_on_purpose();
}

static void
do_x1_recover (bool did_commit) {
    DB_ENV *env;
    DB *dba, *dbb;
    int r;
    char datadir[TOKU_PATH_MAX+1];
    toku_path_join(datadir, 2, TOKU_TEST_FILENAME, "data");
    toku_os_recursive_delete(datadir);
    r = toku_os_mkdir(datadir, S_IRWXU+S_IRWXG+S_IRWXO);                                    CKERR(r);
    r = db_env_create(&env, 0);                                                             CKERR(r);
    r = env->set_data_dir(env, "data");                                                     CKERR(r);
    r = env->set_default_bt_compare(env, my_compare);                                       CKERR(r);
    r = env->open(env, TOKU_TEST_FILENAME, envflags|DB_RECOVER, S_IRWXU+S_IRWXG+S_IRWXO);               CKERR(r);
    r = db_create(&dba, env, 0);                                                            CKERR(r);
    r = dba->open(dba, NULL, namea, NULL, DB_BTREE, DB_AUTO_COMMIT|DB_CREATE, 0666);        CKERR(r);
    r = db_create(&dbb, env, 0);                                                            CKERR(r);
    r = dba->open(dbb, NULL, nameb, NULL, DB_BTREE, DB_AUTO_COMMIT|DB_CREATE, 0666);        CKERR(r);
    DBT aa, ab;
    dbt_init(&aa, NULL, 0);
    dbt_init(&ab, NULL, 0);
    DBT ba, bb;
    dbt_init(&ba, NULL, 0);
    dbt_init(&bb, NULL, 0);
    DB_TXN *txn;
    DBC *ca,*cb;
    r = env->txn_begin(env, NULL, &txn, 0);                                                 CKERR(r);
    r = dba->cursor(dba, txn, &ca, 0);                                                      CKERR(r);
    r = dbb->cursor(dbb, txn, &cb, 0);                                                      CKERR(r);
    int ra = ca->c_get(ca, &aa, &ab, DB_FIRST);                                             CKERR(r);
    int rb = cb->c_get(cb, &ba, &bb, DB_FIRST);                                             CKERR(r);
    if (did_commit) {
	assert(ra==0);
	assert(rb==0);
	// verify key-value pairs
	assert(aa.size==2);
	assert(ab.size==2);
	assert(ba.size==2);
	assert(bb.size==2);
	const char a[2] = "a";
	const char b[2] = "b";
        assert(memcmp(aa.data, &a, 2)==0);
        assert(memcmp(ab.data, &b, 2)==0);
        assert(memcmp(ab.data, &b, 2)==0);
        assert(memcmp(bb.data, &a, 2)==0);
	assert(ca->c_get(ca, &aa, &ab, DB_NEXT) == 0);
        assert(aa.size == 2 && ab.size == 2 && memcmp(aa.data, b, 2) == 0 && memcmp(ab.data, a, 2) == 0);
	// make sure no other entries in DB
	assert(ca->c_get(ca, &aa, &ab, DB_NEXT) == DB_NOTFOUND);
	assert(cb->c_get(cb, &ba, &bb, DB_NEXT) == DB_NOTFOUND);
	fprintf(stderr, "Both verified. Yay!\n");
    } else {
	// It wasn't committed (it also wasn't aborted), but a checkpoint happened.
	assert(ra==DB_NOTFOUND);
	assert(rb==DB_NOTFOUND);
	fprintf(stderr, "Neither present. Yay!\n");
    }
    r = ca->c_close(ca);                                                                    CKERR(r);
    r = cb->c_close(cb);                                                                    CKERR(r);
    r = txn->commit(txn, 0);                                                                CKERR(r);
    r = dba->close(dba, 0);                                                                 CKERR(r);
    r = dbb->close(dbb, 0);                                                                 CKERR(r);
    r = env->close(env, 0);                                                                 CKERR(r);
    exit(0);
}

static void
do_x1_recover_only (void) {
    DB_ENV *env;
    int r;

    r = db_env_create(&env, 0);                                                             CKERR(r);
    r = env->open(env, TOKU_TEST_FILENAME, envflags|DB_RECOVER, S_IRWXU+S_IRWXG+S_IRWXO);                          CKERR(r);
    r = env->close(env, 0);                                                                 CKERR(r);
    exit(0);
}

static void
do_x1_no_recover (void) {
    DB_ENV *env;
    int r;

    r = db_env_create(&env, 0);                                                             CKERR(r);
    r = env->open(env, TOKU_TEST_FILENAME, envflags & ~DB_RECOVER, S_IRWXU+S_IRWXG+S_IRWXO);
    assert(r == DB_RUNRECOVERY);
    r = env->close(env, 0);                                                                 CKERR(r);
    exit(0);
}

const char *cmd;

#if 0

static void
do_test_internal (bool commit)
{
    pid_t pid;
    if (0 == (pid=fork())) {
	int r=execl(cmd, verbose ? "-v" : "-q", commit ? "--commit" : "--abort", NULL);
	assert(r==-1);
	printf("execl failed: %d (%s)\n", errno, strerror(errno));
	assert(0);
    }
    {
	int r;
	int status;
	r = waitpid(pid, &status, 0);
	//printf("signaled=%d sig=%d\n", WIFSIGNALED(status), WTERMSIG(status));
	assert(WIFSIGNALED(status) && WTERMSIG(status)==SIGABRT);
    }
    // Now find out what happend
    
    if (0 == (pid = fork())) {
	int r=execl(cmd, verbose ? "-v" : "-q", commit ? "--recover-committed" : "--recover-aborted", NULL);
	assert(r==-1);
	printf("execl failed: %d (%s)\n", errno, strerror(errno));
	assert(0);
    }
    {
	int r;
	int status;
	r = waitpid(pid, &status, 0);
	//printf("recovery exited=%d\n", WIFEXITED(status));
	assert(WIFEXITED(status) && WEXITSTATUS(status)==0);
    }
}

static void
do_test (void) {
    do_test_internal(true);
    do_test_internal(false);
}

#endif


bool do_commit=false, do_abort=false, do_explicit_abort=false, do_recover_committed=false,  do_recover_aborted=false, do_recover_only=false, do_no_recover = false;

static void
x1_parse_args (int argc, char * const argv[]) {
    int resultcode;
    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], "--commit")==0 || strcmp(argv[0], "--test") == 0) {
	    do_commit=true;
	} else if (strcmp(argv[0], "--abort")==0) {
	    do_abort=true;
	} else if (strcmp(argv[0], "--explicit-abort")==0) {
	    do_explicit_abort=true;
	} else if (strcmp(argv[0], "--recover-committed")==0 || strcmp(argv[0], "--recover") == 0) {
	    do_recover_committed=true;
	} else if (strcmp(argv[0], "--recover-aborted")==0) {
	    do_recover_aborted=true;
        } else if (strcmp(argv[0], "--recover-only") == 0) {
            do_recover_only=true;
        } else if (strcmp(argv[0], "--no-recover") == 0) {
            do_no_recover=true;
	} else if (strcmp(argv[0], "-h")==0) {
	    resultcode=0;
	do_usage:
	    fprintf(stderr, "Usage:\n%s [-v|-q]* [-h] {--commit | --abort | --explicit-abort | --recover-committed | --recover-aborted } \n", cmd);
	    exit(resultcode);
	} else {
	    fprintf(stderr, "Unknown arg: %s\n", argv[0]);
	    resultcode=1;
	    goto do_usage;
	}
	argc--;
	argv++;
    }
    {
	int n_specified=0;
	if (do_commit)            n_specified++;
	if (do_abort)             n_specified++;
	if (do_explicit_abort)    n_specified++;
	if (do_recover_committed) n_specified++;
	if (do_recover_aborted)   n_specified++;
	if (do_recover_only)      n_specified++;
	if (do_no_recover)        n_specified++;
	if (n_specified>1) {
	    printf("Specify only one of --commit or --abort or --recover-committed or --recover-aborted\n");
	    resultcode=1;
	    goto do_usage;
	}
    }
}

int
test_main (int argc, char * const argv[])
{
    x1_parse_args(argc, argv);
    if (do_commit) {
	do_x1_shutdown (true, false);
    } else if (do_abort) {
	do_x1_shutdown (false, false);
    } else if (do_explicit_abort) {
        do_x1_shutdown(false, true);
    } else if (do_recover_committed) {
	do_x1_recover(true);
    } else if (do_recover_aborted) {
	do_x1_recover(false);
    } else if (do_recover_only) {
        do_x1_recover_only();
    } else if (do_no_recover) {
        do_x1_no_recover();
    } 
#if 0
    else {
	do_test();
    }
#endif
    return 0;
}