/*-
 * SPDX-License-Identifier: BSD-3-Clause
 *
 * Copyright (c) 1990, 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Mike Olson.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <sys/param.h>
#include <fcntl.h>
#include <db.h>
#include <errno.h>
#include <stdio.h>
#include <ctype.h>
#include <stdlib.h>
#include <string.h>
#include "btree.h"

typedef struct cmd_table {
        char *cmd;
        int nargs;
        int rconv;
        void (*func)(DB *, char **);
        char *usage, *descrip;
} cmd_table;

int stopstop;
DB *globaldb;

void append(DB *, char **);
void bstat(DB *, char **);
void cursor(DB *, char **);
void delcur(DB *, char **);
void delete(DB *, char **);
void dump(DB *, char **);
void first(DB *, char **);
void get(DB *, char **);
void help(DB *, char **);
void iafter(DB *, char **);
void ibefore(DB *, char **);
void icursor(DB *, char **);
void insert(DB *, char **);
void keydata(DBT *, DBT *);
void last(DB *, char **);
void list(DB *, char **);
void load(DB *, char **);
void mstat(DB *, char **);
void next(DB *, char **);
int  parse(char *, char **, int);
void previous(DB *, char **);
void show(DB *, char **);
void usage(void);
void user(DB *);

cmd_table commands[] = {
        "?",    0, 0, help, "help", NULL,
        "a",    2, 1, append, "append key def", "append key with data def",
        "b",    0, 0, bstat, "bstat", "stat btree",
        "c",    1, 1, cursor,  "cursor word", "move cursor to word",
        "delc", 0, 0, delcur, "delcur", "delete key the cursor references",
        "dele", 1, 1, delete, "delete word", "delete word",
        "d",    0, 0, dump, "dump", "dump database",
        "f",    0, 0, first, "first", "move cursor to first record",
        "g",    1, 1, get, "get key", "locate key",
        "h",    0, 0, help, "help", "print command summary",
        "ia",   2, 1, iafter, "iafter key data", "insert data after key",
        "ib",   2, 1, ibefore, "ibefore key data", "insert data before key",
        "ic",   2, 1, icursor, "icursor key data", "replace cursor",
        "in",   2, 1, insert, "insert key def", "insert key with data def",
        "la",   0, 0, last, "last", "move cursor to last record",
        "li",   1, 1, list, "list file", "list to a file",
        "loa",  1, 0, load, "load file", NULL,
        "loc",  1, 1, get, "get key", NULL,
        "m",    0, 0, mstat, "mstat", "stat memory pool",
        "n",    0, 0, next, "next", "move cursor forward one record",
        "p",    0, 0, previous, "previous", "move cursor back one record",
        "q",    0, 0, NULL, "quit", "quit",
        "sh",   1, 0, show, "show page", "dump a page",
        { NULL },
};

int recno;                                      /* use record numbers */
char *dict = "words";                           /* default dictionary */
char *progname;

int
main(argc, argv)
        int argc;
        char **argv;
{
        int c;
        DB *db;
        BTREEINFO b;

        progname = *argv;

        b.flags = 0;
        b.cachesize = 0;
        b.maxkeypage = 0;
        b.minkeypage = 0;
        b.psize = 0;
        b.compare = NULL;
        b.prefix = NULL;
        b.lorder = 0;

        while ((c = getopt(argc, argv, "bc:di:lp:ru")) != -1) {
                switch (c) {
                case 'b':
                        b.lorder = BIG_ENDIAN;
                        break;
                case 'c':
                        b.cachesize = atoi(optarg);
                        break;
                case 'd':
                        b.flags |= R_DUP;
                        break;
                case 'i':
                        dict = optarg;
                        break;
                case 'l':
                        b.lorder = LITTLE_ENDIAN;
                        break;
                case 'p':
                        b.psize = atoi(optarg);
                        break;
                case 'r':
                        recno = 1;
                        break;
                case 'u':
                        b.flags = 0;
                        break;
                default:
                        usage();
                }
        }
        argc -= optind;
        argv += optind;

        if (recno)
                db = dbopen(*argv == NULL ? NULL : *argv, O_RDWR,
                    0, DB_RECNO, NULL);
        else
                db = dbopen(*argv == NULL ? NULL : *argv, O_CREAT|O_RDWR,
                    0600, DB_BTREE, &b);

        if (db == NULL) {
                (void)fprintf(stderr, "dbopen: %s\n", strerror(errno));
                exit(1);
        }
        globaldb = db;
        user(db);
        exit(0);
        /* NOTREACHED */
}

void
user(db)
        DB *db;
{
        FILE *ifp;
        int argc, i, last;
        char *lbuf, *argv[4], buf[512];

        if ((ifp = fopen("/dev/tty", "r")) == NULL) {
                (void)fprintf(stderr,
                    "/dev/tty: %s\n", strerror(errno));
                exit(1);
        }
        for (last = 0;;) {
                (void)printf("> ");
                (void)fflush(stdout);
                if ((lbuf = fgets(&buf[0], 512, ifp)) == NULL)
                        break;
                if (lbuf[0] == '\n') {
                        i = last;
                        goto uselast;
                }
                lbuf[strlen(lbuf) - 1] = '\0';

                if (lbuf[0] == 'q')
                        break;

                argc = parse(lbuf, &argv[0], 3);
                if (argc == 0)
                        continue;

                for (i = 0; commands[i].cmd != NULL; i++)
                        if (strncmp(commands[i].cmd, argv[0],
                            strlen(commands[i].cmd)) == 0)
                                break;

                if (commands[i].cmd == NULL) {
                        (void)fprintf(stderr,
                            "%s: command unknown ('help' for help)\n", lbuf);
                        continue;
                }

                if (commands[i].nargs != argc - 1) {
                        (void)fprintf(stderr, "usage: %s\n", commands[i].usage);
                        continue;
                }

                if (recno && commands[i].rconv) {
                        static recno_t nlong;
                        nlong = atoi(argv[1]);
                        argv[1] = (char *)&nlong;
                }
uselast:        last = i;
                (*commands[i].func)(db, argv);
        }
        if ((db->sync)(db) == RET_ERROR)
                perror("dbsync");
        else if ((db->close)(db) == RET_ERROR)
                perror("dbclose");
}

int
parse(lbuf, argv, maxargc)
        char *lbuf, **argv;
        int maxargc;
{
        int argc = 0;
        char *c;

        c = lbuf;
        while (isspace(*c))
                c++;
        while (*c != '\0' && argc < maxargc) {
                *argv++ = c;
                argc++;
                while (!isspace(*c) && *c != '\0') {
                        c++;
                }
                while (isspace(*c))
                        *c++ = '\0';
        }
        return (argc);
}

void
append(db, argv)
        DB *db;
        char **argv;
{
        DBT key, data;
        int status;

        if (!recno) {
                (void)fprintf(stderr,
                    "append only available for recno db's.\n");
                return;
        }
        key.data = argv[1];
        key.size = sizeof(recno_t);
        data.data = argv[2];
        data.size = strlen(data.data);
        status = (db->put)(db, &key, &data, R_APPEND);
        switch (status) {
        case RET_ERROR:
                perror("append/put");
                break;
        case RET_SPECIAL:
                (void)printf("%s (duplicate key)\n", argv[1]);
                break;
        case RET_SUCCESS:
                break;
        }
}

void
cursor(db, argv)
        DB *db;
        char **argv;
{
        DBT data, key;
        int status;

        key.data = argv[1];
        if (recno)
                key.size = sizeof(recno_t);
        else
                key.size = strlen(argv[1]) + 1;
        status = (*db->seq)(db, &key, &data, R_CURSOR);
        switch (status) {
        case RET_ERROR:
                perror("cursor/seq");
                break;
        case RET_SPECIAL:
                (void)printf("key not found\n");
                break;
        case RET_SUCCESS:
                keydata(&key, &data);
                break;
        }
}

void
delcur(db, argv)
        DB *db;
        char **argv;
{
        int status;

        status = (*db->del)(db, NULL, R_CURSOR);

        if (status == RET_ERROR)
                perror("delcur/del");
}

void
delete(db, argv)
        DB *db;
        char **argv;
{
        DBT key;
        int status;

        key.data = argv[1];
        if (recno)
                key.size = sizeof(recno_t);
        else
                key.size = strlen(argv[1]) + 1;

        status = (*db->del)(db, &key, 0);
        switch (status) {
        case RET_ERROR:
                perror("delete/del");
                break;
        case RET_SPECIAL:
                (void)printf("key not found\n");
                break;
        case RET_SUCCESS:
                break;
        }
}

void
dump(db, argv)
        DB *db;
        char **argv;
{
        __bt_dump(db);
}

void
first(db, argv)
        DB *db;
        char **argv;
{
        DBT data, key;
        int status;

        status = (*db->seq)(db, &key, &data, R_FIRST);

        switch (status) {
        case RET_ERROR:
                perror("first/seq");
                break;
        case RET_SPECIAL:
                (void)printf("no more keys\n");
                break;
        case RET_SUCCESS:
                keydata(&key, &data);
                break;
        }
}

void
get(db, argv)
        DB *db;
        char **argv;
{
        DBT data, key;
        int status;

        key.data = argv[1];
        if (recno)
                key.size = sizeof(recno_t);
        else
                key.size = strlen(argv[1]) + 1;

        status = (*db->get)(db, &key, &data, 0);

        switch (status) {
        case RET_ERROR:
                perror("get/get");
                break;
        case RET_SPECIAL:
                (void)printf("key not found\n");
                break;
        case RET_SUCCESS:
                keydata(&key, &data);
                break;
        }
}

void
help(db, argv)
        DB *db;
        char **argv;
{
        int i;

        for (i = 0; commands[i].cmd; i++)
                if (commands[i].descrip)
                        (void)printf("%s: %s\n",
                            commands[i].usage, commands[i].descrip);
}

void
iafter(db, argv)
        DB *db;
        char **argv;
{
        DBT key, data;
        int status;

        if (!recno) {
                (void)fprintf(stderr,
                    "iafter only available for recno db's.\n");
                return;
        }
        key.data = argv[1];
        key.size = sizeof(recno_t);
        data.data = argv[2];
        data.size = strlen(data.data);
        status = (db->put)(db, &key, &data, R_IAFTER);
        switch (status) {
        case RET_ERROR:
                perror("iafter/put");
                break;
        case RET_SPECIAL:
                (void)printf("%s (duplicate key)\n", argv[1]);
                break;
        case RET_SUCCESS:
                break;
        }
}

void
ibefore(db, argv)
        DB *db;
        char **argv;
{
        DBT key, data;
        int status;

        if (!recno) {
                (void)fprintf(stderr,
                    "ibefore only available for recno db's.\n");
                return;
        }
        key.data = argv[1];
        key.size = sizeof(recno_t);
        data.data = argv[2];
        data.size = strlen(data.data);
        status = (db->put)(db, &key, &data, R_IBEFORE);
        switch (status) {
        case RET_ERROR:
                perror("ibefore/put");
                break;
        case RET_SPECIAL:
                (void)printf("%s (duplicate key)\n", argv[1]);
                break;
        case RET_SUCCESS:
                break;
        }
}

void
icursor(db, argv)
        DB *db;
        char **argv;
{
        int status;
        DBT data, key;

        key.data = argv[1];
        if (recno)
                key.size = sizeof(recno_t);
        else
                key.size = strlen(argv[1]) + 1;
        data.data = argv[2];
        data.size = strlen(argv[2]) + 1;

        status = (*db->put)(db, &key, &data, R_CURSOR);
        switch (status) {
        case RET_ERROR:
                perror("icursor/put");
                break;
        case RET_SPECIAL:
                (void)printf("%s (duplicate key)\n", argv[1]);
                break;
        case RET_SUCCESS:
                break;
        }
}

void
insert(db, argv)
        DB *db;
        char **argv;
{
        int status;
        DBT data, key;

        key.data = argv[1];
        if (recno)
                key.size = sizeof(recno_t);
        else
                key.size = strlen(argv[1]) + 1;
        data.data = argv[2];
        data.size = strlen(argv[2]) + 1;

        status = (*db->put)(db, &key, &data, R_NOOVERWRITE);
        switch (status) {
        case RET_ERROR:
                perror("insert/put");
                break;
        case RET_SPECIAL:
                (void)printf("%s (duplicate key)\n", argv[1]);
                break;
        case RET_SUCCESS:
                break;
        }
}

void
last(db, argv)
        DB *db;
        char **argv;
{
        DBT data, key;
        int status;

        status = (*db->seq)(db, &key, &data, R_LAST);

        switch (status) {
        case RET_ERROR:
                perror("last/seq");
                break;
        case RET_SPECIAL:
                (void)printf("no more keys\n");
                break;
        case RET_SUCCESS:
                keydata(&key, &data);
                break;
        }
}

void
list(db, argv)
        DB *db;
        char **argv;
{
        DBT data, key;
        FILE *fp;
        int status;

        if ((fp = fopen(argv[1], "w")) == NULL) {
                (void)fprintf(stderr, "%s: %s\n", argv[1], strerror(errno));
                return;
        }
        status = (*db->seq)(db, &key, &data, R_FIRST);
        while (status == RET_SUCCESS) {
                (void)fprintf(fp, "%s\n", key.data);
                status = (*db->seq)(db, &key, &data, R_NEXT);
        }
        if (status == RET_ERROR)
                perror("list/seq");
}

DB *BUGdb;
void
load(db, argv)
        DB *db;
        char **argv;
{
        char *p, *t;
        FILE *fp;
        DBT data, key;
        recno_t cnt;
        size_t len;
        int status;
        char *lp, buf[16 * 1024];

        BUGdb = db;
        if ((fp = fopen(argv[1], "r")) == NULL) {
                (void)fprintf(stderr, "%s: %s\n", argv[1], strerror(errno));
                return;
        }
        (void)printf("loading %s...\n", argv[1]);

        for (cnt = 1; (lp = fgetline(fp, &len)) != NULL; ++cnt) {
                if (recno) {
                        key.data = &cnt;
                        key.size = sizeof(recno_t);
                        data.data = lp;
                        data.size = len + 1;
                } else {
                        key.data = lp;
                        key.size = len + 1;
                        for (p = lp + len - 1, t = buf; p >= lp; *t++ = *p--);
                        *t = '\0';
                        data.data = buf;
                        data.size = len + 1;
                }

                status = (*db->put)(db, &key, &data, R_NOOVERWRITE);
                switch (status) {
                case RET_ERROR:
                        perror("load/put");
                        exit(1);
                case RET_SPECIAL:
                        if (recno)
                                (void)fprintf(stderr,
                                    "duplicate: %ld {%s}\n", cnt, data.data);
                        else
                                (void)fprintf(stderr,
                                    "duplicate: %ld {%s}\n", cnt, key.data);
                        exit(1);
                case RET_SUCCESS:
                        break;
                }
        }
        (void)fclose(fp);
}

void
next(db, argv)
        DB *db;
        char **argv;
{
        DBT data, key;
        int status;

        status = (*db->seq)(db, &key, &data, R_NEXT);

        switch (status) {
        case RET_ERROR:
                perror("next/seq");
                break;
        case RET_SPECIAL:
                (void)printf("no more keys\n");
                break;
        case RET_SUCCESS:
                keydata(&key, &data);
                break;
        }
}

void
previous(db, argv)
        DB *db;
        char **argv;
{
        DBT data, key;
        int status;

        status = (*db->seq)(db, &key, &data, R_PREV);

        switch (status) {
        case RET_ERROR:
                perror("previous/seq");
                break;
        case RET_SPECIAL:
                (void)printf("no more keys\n");
                break;
        case RET_SUCCESS:
                keydata(&key, &data);
                break;
        }
}

void
show(db, argv)
        DB *db;
        char **argv;
{
        BTREE *t;
        PAGE *h;
        pgno_t pg;

        pg = atoi(argv[1]);
        t = db->internal;
        if ((h = mpool_get(t->bt_mp, pg, 0)) == NULL) {
                (void)printf("getpage of %ld failed\n", pg);
                return;
        }
        if (pg == 0)
                __bt_dmpage(h);
        else
                __bt_dpage(h);
        mpool_put(t->bt_mp, h, 0);
}

void
bstat(db, argv)
        DB *db;
        char **argv;
{
        (void)printf("BTREE\n");
        __bt_stat(db);
}

void
mstat(db, argv)
        DB *db;
        char **argv;
{
        (void)printf("MPOOL\n");
        mpool_stat(((BTREE *)db->internal)->bt_mp);
}

void
keydata(key, data)
        DBT *key, *data;
{
        if (!recno && key->size > 0)
                (void)printf("%s/", key->data);
        if (data->size > 0)
                (void)printf("%s", data->data);
        (void)printf("\n");
}

void
usage()
{
        (void)fprintf(stderr,
            "usage: %s [-bdlu] [-c cache] [-i file] [-p page] [file]\n",
            progname);
        exit (1);
}