/*      $OpenBSD: main.c,v 1.31 2022/12/04 23:50:45 cheloha Exp $       */
/*      $NetBSD: main.c,v 1.5 1995/04/22 10:08:54 cgd 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 <err.h>
#include <errno.h>
#include <fcntl.h>
#include <signal.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include "robots.h"

void
usage(void)
{
        fprintf(stderr, "usage: %s [-ajrst] [scorefile]\n", getprogname());
        exit(1);
}

int
main(int ac, char *av[])
{
        bool            show_only;
        extern char     Scorefile[PATH_MAX];
        int             score_wfd;     /* high score writable file descriptor */
        int             score_err = 0; /* hold errno from score file open */
        int             ch;
        int             ret;
        char            *home;
#ifdef FANCY
        char            *sp;
#endif

        home = getenv("HOME");
        if (home == NULL || *home == '\0')
                err(1, "getenv");

        ret = snprintf(Scorefile, sizeof(Scorefile), "%s/%s", home,
            ".robots.scores");
        if (ret < 0 || ret >= PATH_MAX)
                errc(1, ENAMETOOLONG, "%s/%s", home, ".robots.scores");

        if ((score_wfd = open(Scorefile, O_RDWR | O_CREAT, 0666)) == -1)
                score_err = errno;

        show_only = FALSE;
        while ((ch = getopt(ac, av, "srajt")) != -1)
                switch (ch) {
                case 's':
                        show_only = TRUE;
                        break;
                case 'r':
                        Real_time = TRUE;
                        /* Could be a command-line option */
                        tv.tv_sec = 3;
                        break;
                case 'a':
                        Start_level = 4;
                        break;
                case 'j':
                        Jump = TRUE;
                        break;
                case 't':
                        Teleport = TRUE;
                        break;
                default:
                        usage();
                }
        ac -= optind;
        av += optind;

        if (ac > 1)
                usage();
        if (ac == 1) {
                if (strlcpy(Scorefile, av[0], sizeof(Scorefile)) >=
                    sizeof(Scorefile))
                        errc(1, ENAMETOOLONG, "%s", av[0]);
                if (score_wfd >= 0)
                        close(score_wfd);
                /* This file requires no special privileges. */
                if ((score_wfd = open(Scorefile, O_RDWR | O_CREAT, 0666)) == -1)
                        score_err = errno;
#ifdef  FANCY
                sp = strrchr(Scorefile, '/');
                if (sp == NULL)
                        sp = Scorefile;
                if (strcmp(sp, "pattern_roll") == 0)
                        Pattern_roll = TRUE;
                else if (strcmp(sp, "stand_still") == 0)
                        Stand_still = TRUE;
                if (Pattern_roll || Stand_still)
                        Teleport = TRUE;
#endif
        }

        if (show_only) {
                show_score();
                return 0;
        }

        if (score_wfd < 0) {
                warnx("%s: %s; no scores will be saved", Scorefile,
                        strerror(score_err));
                sleep(1);
        }

        initscr();

        if (pledge("stdio tty", NULL) == -1)
                err(1, "pledge");

        signal(SIGINT, quit);
        cbreak();
        noecho();
        nonl();
        if (LINES != Y_SIZE || COLS != X_SIZE) {
                if (LINES < Y_SIZE || COLS < X_SIZE) {
                        endwin();
                        errx(1, "Need at least a %dx%d screen", Y_SIZE, X_SIZE);
                }
                delwin(stdscr);
                stdscr = newwin(Y_SIZE, X_SIZE, 0, 0);
        }

        do {
                init_field();
                for (Level = Start_level; !Dead; Level++) {
                        make_level();
                        play_level();
                }
                if (My_pos.x > X_FIELDSIZE - 16)
                        move(My_pos.y, X_FIELDSIZE - 16);
                else
                        move(My_pos.y, My_pos.x);
                printw("AARRrrgghhhh....");
                refresh();
                score(score_wfd);
        } while (another());
        quit(0);
}

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

/*
 * another:
 *      See if another game is desired
 */
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;
}