/*      $NetBSD: graphics.c,v 1.21 2021/05/02 12:50:43 rillig Exp $     */

/*-
 * Copyright (c) 1990, 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Ed James.
 *
 * 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.
 */

/*
 * Copyright (c) 1987 by Ed James, UC Berkeley.  All rights reserved.
 *
 * Copy permission is hereby granted provided that this notice is
 * retained on all partial or complete copies.
 *
 * For more info on this and all of my stuff, mail edjames@berkeley.edu.
 */

#include <sys/cdefs.h>
#ifndef lint
#if 0
static char sccsid[] = "@(#)graphics.c  8.1 (Berkeley) 5/31/93";
#else
__RCSID("$NetBSD: graphics.c,v 1.21 2021/05/02 12:50:43 rillig Exp $");
#endif
#endif /* not lint */

#include <stdio.h>
#include <stdlib.h>
#include <curses.h>
#include <errno.h>
#include <err.h>

#include "def.h"
#include "struct.h"
#include "extern.h"
#include "tunable.h"

#define C_TOPBOTTOM             '-'
#define C_LEFTRIGHT             '|'
#define C_AIRPORT               '='
#define C_LINE                  '+'
#define C_BACKROUND             '.'
#define C_BEACON                '*'
#define C_CREDIT                '*'

static void draw_line(WINDOW *, int, int, int, int, const char *);

static WINDOW *radar, *cleanradar, *credit, *input, *planes;

int
getAChar(void)
{
        int c;

        errno = 0;
        while ((c = getchar()) == EOF && errno == EINTR) {
                errno = 0;
                clearerr(stdin);
        }
        return(c);
}

void
erase_all(void)
{
        PLANE   *pp;

        for (pp = air.head; pp != NULL; pp = pp->next) {
                (void)wmove(cleanradar, pp->ypos, pp->xpos * 2);
                (void)wmove(radar, pp->ypos, pp->xpos * 2);
                (void)waddch(radar, winch(cleanradar));
                (void)wmove(cleanradar, pp->ypos, pp->xpos * 2 + 1);
                (void)wmove(radar, pp->ypos, pp->xpos * 2 + 1);
                (void)waddch(radar, winch(cleanradar));
        }
}

void
draw_all(void)
{
        PLANE   *pp;

        for (pp = air.head; pp != NULL; pp = pp->next) {
                if (pp->status == S_MARKED)
                        (void)wstandout(radar);
                (void)wmove(radar, pp->ypos, pp->xpos * 2);
                (void)waddch(radar, name(pp));
                (void)waddch(radar, '0' + pp->altitude);
                if (pp->status == S_MARKED)
                        (void)wstandend(radar);
        }
        (void)wrefresh(radar);
        (void)planewin();
        (void)wrefresh(input);          /* return cursor */
        (void)fflush(stdout);
}

void
init_gr(void)
{
        static char     buffer[BUFSIZ];

        if (!initscr())
                errx(0, "couldn't initialize screen");
        setbuf(stdout, buffer);
        input = newwin(INPUT_LINES, COLS - PLANE_COLS, LINES - INPUT_LINES, 0);
        credit = newwin(INPUT_LINES, PLANE_COLS, LINES - INPUT_LINES,
                COLS - PLANE_COLS);
        planes = newwin(LINES - INPUT_LINES, PLANE_COLS, 0, COLS - PLANE_COLS);
}

void
shutdown_gr(void)
{
        (void)clear();  /* move to top of screen */
        (void)refresh();
        (void)fflush(stdout);
        (void)endwin();
}

void
setup_screen(const C_SCREEN *scp)
{
        int     i, j;
        unsigned iu;
        char    str[3];
        const char *airstr;

        str[2] = '\0';

        if (radar != NULL)
                (void)delwin(radar);
        radar = newwin(scp->height, scp->width * 2, 0, 0);

        if (cleanradar != NULL)
                (void)delwin(cleanradar);
        cleanradar = newwin(scp->height, scp->width * 2, 0, 0);

        /* minus one here to prevent a scroll */
        for (i = 0; i < PLANE_COLS - 1; i++) {
                (void)wmove(credit, 0, i);
                (void)waddch(credit, C_CREDIT);
                (void)wmove(credit, INPUT_LINES - 1, i);
                (void)waddch(credit, C_CREDIT);
        }
        (void)wmove(credit, INPUT_LINES / 2, 1);
        (void)waddstr(credit, AUTHOR_STR);

        for (i = 1; i < scp->height - 1; i++) {
                for (j = 1; j < scp->width - 1; j++) {
                        (void)wmove(radar, i, j * 2);
                        (void)waddch(radar, C_BACKROUND);
                }
        }

        /*
         * Draw the lines first, since people like to draw lines
         * through beacons and exit points.
         */
        str[0] = C_LINE;
        for (iu = 0; iu < scp->num_lines; iu++) {
                str[1] = ' ';
                draw_line(radar, scp->line[iu].p1.x, scp->line[iu].p1.y,
                        scp->line[iu].p2.x, scp->line[iu].p2.y, str);
        }

        str[0] = C_TOPBOTTOM;
        str[1] = C_TOPBOTTOM;
        (void)wmove(radar, 0, 0);
        for (i = 0; i < scp->width - 1; i++)
                (void)waddstr(radar, str);
        (void)waddch(radar, C_TOPBOTTOM);

        str[0] = C_TOPBOTTOM;
        str[1] = C_TOPBOTTOM;
        (void)wmove(radar, scp->height - 1, 0);
        for (i = 0; i < scp->width - 1; i++)
                (void)waddstr(radar, str);
        (void)waddch(radar, C_TOPBOTTOM);

        for (i = 1; i < scp->height - 1; i++) {
                (void)wmove(radar, i, 0);
                (void)waddch(radar, C_LEFTRIGHT);
                (void)wmove(radar, i, (scp->width - 1) * 2);
                (void)waddch(radar, C_LEFTRIGHT);
        }

        str[0] = C_BEACON;
        for (iu = 0; iu < scp->num_beacons; iu++) {
                str[1] = '0' + iu;
                (void)wmove(radar, scp->beacon[iu].y, scp->beacon[iu].x * 2);
                (void)waddstr(radar, str);
        }

        for (iu = 0; iu < scp->num_exits; iu++) {
                (void)wmove(radar, scp->exit[iu].y, scp->exit[iu].x * 2);
                (void)waddch(radar, '0' + iu);
        }

        airstr = "^?>?v?<?";
        for (iu = 0; iu < scp->num_airports; iu++) {
                str[0] = airstr[scp->airport[iu].dir];
                str[1] = '0' + iu;
                (void)wmove(radar, scp->airport[iu].y, scp->airport[iu].x * 2);
                (void)waddstr(radar, str);
        }

        (void)overwrite(radar, cleanradar);
        (void)wrefresh(radar);
        (void)wrefresh(credit);
        (void)fflush(stdout);
}

static void
draw_line(WINDOW *w, int x, int y, int lx, int ly, const char *s)
{
        int     dx, dy;

        dx = SGN(lx - x);
        dy = SGN(ly - y);
        for (;;) {
                (void)wmove(w, y, x * 2);
                (void)waddstr(w, s);
                if (x == lx && y == ly)
                        break;
                x += dx;
                y += dy;
        }
}

void
ioclrtoeol(int pos)
{
        (void)wmove(input, 0, pos);
        (void)wclrtoeol(input);
        (void)wrefresh(input);
        (void)fflush(stdout);
}

void
iomove(int pos)
{
        (void)wmove(input, 0, pos);
        (void)wrefresh(input);
        (void)fflush(stdout);
}

void
ioaddstr(int pos, const char *str)
{
        (void)wmove(input, 0, pos);
        (void)waddstr(input, str);
        (void)wrefresh(input);
        (void)fflush(stdout);
}

void
ioclrtobot(void)
{
        (void)wclrtobot(input);
        (void)wrefresh(input);
        (void)fflush(stdout);
}

void
ioerror(int pos, int len, const char *str)
{
        int     i;

        (void)wmove(input, 1, pos);
        for (i = 0; i < len; i++)
                (void)waddch(input, '^');
        (void)wmove(input, 2, 0);
        (void)waddstr(input, str);
        (void)wrefresh(input);
        (void)fflush(stdout);
}

static int ioquit_x, ioquit_y;

void
ioaskquit(void)
{
        getyx(input, ioquit_y, ioquit_x);
        (void)wmove(input, 2, 0);
        (void)waddstr(input, "Really quit? (y/n) ");
        (void)wclrtobot(input);
        (void)wrefresh(input);
        (void)fflush(stdout);
}

void
ionoquit(void)
{
        (void)wmove(input, 2, 0);
        (void)wclrtobot(input);
        (void)wmove(input, ioquit_y, ioquit_x);
        (void)wrefresh(input);
        (void)fflush(stdout);
}

void
planewin(void)
{
        PLANE   *pp;
        int     warning = 0;

#ifdef BSD
        (void)wclear(planes);
#endif

        (void)wmove(planes, 0,0);

#ifdef SYSV
        wclrtobot(planes);
#endif
        (void)wprintw(planes, "Time: %-4d Safe: %d", clck, safe_planes);
        (void)wmove(planes, 2, 0);

        (void)waddstr(planes, "pl dt  comm");
        for (pp = air.head; pp != NULL; pp = pp->next) {
                if (waddch(planes, '\n') == ERR) {
                        warning++;
                        break;
                }
                (void)waddstr(planes, command(pp));
        }
        (void)waddch(planes, '\n');
        for (pp = ground.head; pp != NULL; pp = pp->next) {
                if (waddch(planes, '\n') == ERR) {
                        warning++;
                        break;
                }
                (void)waddstr(planes, command(pp));
        }
        if (warning) {
                (void)wmove(planes, LINES - INPUT_LINES - 1, 0);
                (void)waddstr(planes, "---- more ----");
                (void)wclrtoeol(planes);
        }
        (void)wrefresh(planes);
        (void)fflush(stdout);
}

void
losermsg(const PLANE *p, const char *msg)
{
        (void)wmove(input, 0, 0);
        (void)wclrtobot(input);
        /* p may be NULL if we ran out of memory */
        if (p == NULL)
                (void)wprintw(input, "%s\n\nHit space for top players list...",
                    msg);
        else {
                (void)wprintw(input, "Plane '%c' %s\n\n", name(p), msg);
                (void)wprintw(input, "Hit space for top players list...");
        }
        (void)wrefresh(input);
        (void)fflush(stdout);
}

void
redraw(void)
{
        (void)clear();
        (void)refresh();

        (void)touchwin(radar);
        (void)wrefresh(radar);
        (void)touchwin(planes);
        (void)wrefresh(planes);
        (void)touchwin(credit);
        (void)wrefresh(credit);

        /* refresh input last to get cursor in right place */
        (void)touchwin(input);
        (void)wrefresh(input);
        (void)fflush(stdout);
}

void
done_screen(void)
{
        (void)clear();
        (void)refresh();
        (void)endwin();   /* clean up curses */
}