/*      $NetBSD: main.c,v 1.34 2022/06/27 18:48:49 christos Exp $       */

/*
 * Copyright (c) 1980, 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 * 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/cdefs.h>
#ifndef lint
__COPYRIGHT("@(#) Copyright (c) 1980, 1993\
 The Regents of the University of California.  All rights reserved.");
#endif /* not lint */

#ifndef lint
#if 0
static char sccsid[] = "@(#)main.c      8.1 (Berkeley) 5/31/93";
#else
__RCSID("$NetBSD: main.c,v 1.34 2022/06/27 18:48:49 christos Exp $");
#endif
#endif /* not lint */

#include <ctype.h>
#include <curses.h>
#include <string.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <signal.h>
#include <stdlib.h>
#include <time.h>
#include <unistd.h>
#include "robots.h"

extern const char *Scorefile;
extern int Max_per_uid;

static bool another(void);

int
main(int argc, char **argv)
{
        const char *word;
        bool show_only;
        int score_wfd; /* high score writable file descriptor */
        int score_err = 0; /* hold errno from score file open */
        int maximum = 0;
        int ch, i;

        score_wfd = open(Scorefile, O_RDWR);
        if (score_wfd < 0)
                score_err = errno;
        else if (score_wfd < 3)
                exit(1);

        /* Revoke setgid privileges */
        setgid(getgid());

        show_only = false;
        Num_games = 1;

        while ((ch = getopt(argc, argv, "Aajnrst")) != -1) {
                switch (ch) {
                    case 'A':
                        Auto_bot = true;
                        break;
                    case 'a':
                        Start_level = 4;
                        break;
                    case 'j':
                        Jump = true;
                        break;
                    case 'n':
                        Num_games++;
                        break;
                    case 'r':
                        Real_time = true;
                        break;
                    case 's':
                        show_only = true;
                        break;
                    case 't':
                        Teleport = true;
                        break;
                    default:
                        errx(1,
                            "Usage: robots [-Aajnrst] [maximum] [scorefile]");
                        break;
                }
        }

        for (i = optind; i < argc; i++) {
                word = argv[i];
                if (isdigit((unsigned char)word[0])) {
                        maximum = atoi(word);
                } else {
                        Scorefile = word;
                        Max_per_uid = maximum;
                        if (score_wfd >= 0)
                                close(score_wfd);
                        score_wfd = open(Scorefile, O_RDWR);
                        if (score_wfd < 0)
                                score_err = errno;
#ifdef FANCY
                        word = strrchr(Scorefile, '/');
                        if (word == NULL)
                                word = Scorefile;
                        if (strcmp(word, "pattern_roll") == 0)
                                Pattern_roll = true;
                        else if (strcmp(word, "stand_still") == 0)
                                Stand_still = true;
                        if (Pattern_roll || Stand_still)
                                Teleport = true;
#endif
                }
        }

        if (show_only) {
                show_score();
                exit(0);
                /* NOTREACHED */
        }

        if (score_wfd < 0) {
                errno = score_err;
                warn("%s", Scorefile);
                warnx("High scores will not be recorded!");
                sleep(2);
        }

        if (!initscr())
                errx(0, "couldn't initialize screen");
        signal(SIGINT, quit);
        cbreak();
        noecho();
        nonl();
        if (LINES != Y_SIZE || COLS != X_SIZE) {
                if (LINES < Y_SIZE || COLS < X_SIZE) {
                        endwin();
                        printf("Need at least a %dx%d screen\n",
                            Y_SIZE, X_SIZE);
                        exit(1);
                }
                delwin(stdscr);
                stdscr = newwin(Y_SIZE, X_SIZE, 0, 0);
        }

        if (Real_time)
                signal(SIGALRM, move_robots);
        do {
                while (Num_games--) {
                        init_field();
                        for (Level = Start_level; !Dead; Level++) {
                                make_level();
                                play_level();
                                if (Auto_bot)
                                        sleep(1);
                        }
                        move(My_pos.y, My_pos.x);
                        printw("AARRrrgghhhh....");
                        refresh();
                        if (Auto_bot)
                                sleep(1);
                        score(score_wfd);
                        if (Auto_bot)
                                sleep(1);
                        refresh();
                }
                Num_games = 1;
        } while (!Auto_bot && another());
        quit(0);
        /* NOTREACHED */
        return(0);
}

/*
 * quit:
 *      Leave the program elegantly.
 */
void
quit(int dummy __unused)
{
        endwin();
        exit(0);
        /* NOTREACHED */
}

/*
 * another:
 *      See if another game is desired
 */
static bool
another(void)
{
        int y;

#ifdef FANCY
        if ((Stand_still || Pattern_roll) && !Newscore)
                return true;
#endif

        if (query("Another game?")) {
                if (Full_clear) {
                        for (y = 1; y <= Num_scores; y++) {
                                move(y, 1);
                                clrtoeol();
                        }
                        refresh();
                }
                return true;
        }
        return false;
}