/* -*- 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."
// verify that the comparison function get a valid db object pointer

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


const char *descriptor_contents[] = {
    "Spoon full of sugar",
    "Bucket full of pants"
};

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";

int verified = 0;
uint32_t forced_version = 2;

#if USE_TDB

static int my_compare(DB *UU(db), const DBT *a, const DBT *b) {
    assert(db);
    assert(db->cmp_descriptor);
    uint32_t which = forced_version-1;
    size_t len = strlen(descriptor_contents[which])+1;

    assert(db->cmp_descriptor->dbt.size == len);
    assert(memcmp(db->cmp_descriptor->dbt.data, descriptor_contents[which], len) == 0);

    assert(a->size == b->size);
    verified = 1;
    return memcmp(a->data, b->data, a->size);
}   

#endif

static void
change_descriptor(DB* db, int which, DB_ENV* env) {
#if USE_TDB
    DBT descriptor;
    size_t len = strlen(descriptor_contents[which])+1;
    dbt_init(&descriptor, descriptor_contents[which], len);
    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); }
    });
#endif
}

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);
#if USE_TDB
    r = env->set_default_bt_compare(env, my_compare);                                   CKERR(r);
#endif
    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(dba, 0, env);

    r = db_create(&dbb, env, 0);                                                        CKERR(r);
    r = dbb->open(dbb, NULL, namea, NULL, DB_BTREE, DB_AUTO_COMMIT|DB_CREATE, 0666);    CKERR(r);
    change_descriptor(dbb, 1, env);
    DB_TXN *txn;
    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);
    }
    assert(verified);
    //printf("shutdown\n");
    toku_hard_crash_on_purpose();
}

static void
do_x1_recover (bool did_commit) {
    DB_ENV *env;
    DB *dba;
    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);
#if USE_TDB
    r = env->set_default_bt_compare(env, my_compare);                                       CKERR(r);
#endif
    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);
    DBT aa, ab;
    dbt_init(&aa, NULL, 0);
    dbt_init(&ab, NULL, 0);
    DB_TXN *txn;
    DBC *ca;
    r = env->txn_begin(env, NULL, &txn, 0);                                                 CKERR(r);
    r = dba->cursor(dba, txn, &ca, 0);                                                      CKERR(r);
    int ra = ca->c_get(ca, &aa, &ab, DB_FIRST);                                             CKERR(r);
    if (did_commit) {
	assert(ra==0);
	// verify key-value pairs
	assert(aa.size==2);
	assert(ab.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(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);
    } else {
	// It wasn't committed (it also wasn't aborted), but a checkpoint happened.
	assert(ra==DB_NOTFOUND);
    }
    r = ca->c_close(ca);                                                                    CKERR(r);
    r = txn->commit(txn, 0);                                                                CKERR(r);
    r = dba->close(dba, 0);                                                                 CKERR(r);
    r = env->close(env, 0);                                                                 CKERR(r);
    assert(verified);
    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;
}
