/*      $OpenBSD: move_robs.c,v 1.9 2016/01/04 17:33:24 mestre Exp $    */
/*      $NetBSD: move_robs.c,v 1.3 1995/04/22 10:08:59 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 "robots.h"

/*
 * move_robots:
 *      Move the robots around
 */
void
move_robots(void)
{
        COORD   *rp;

#ifdef DEBUG
        move(Min.y, Min.x);
        addch(inch());
        move(Max.y, Max.x);
        addch(inch());
#endif /* DEBUG */
        for (rp = Robots; rp < &Robots[MAXROBOTS]; rp++) {
                if (rp->y < 0)
                        continue;
                mvaddch(rp->y, rp->x, ' ');
                Field[rp->y][rp->x]--;
                rp->y += sign(My_pos.y - rp->y);
                rp->x += sign(My_pos.x - rp->x);
                if (rp->y <= 0)
                        rp->y = 0;
                else if (rp->y >= Y_FIELDSIZE)
                        rp->y = Y_FIELDSIZE - 1;
                if (rp->x <= 0)
                        rp->x = 0;
                else if (rp->x >= X_FIELDSIZE)
                        rp->x = X_FIELDSIZE - 1;
                Field[rp->y][rp->x]++;
        }

        Min.y = Y_FIELDSIZE;
        Min.x = X_FIELDSIZE;
        Max.y = 0;
        Max.x = 0;
        for (rp = Robots; rp < &Robots[MAXROBOTS]; rp++)
                if (rp->y < 0)
                        continue;
                else if (rp->y == My_pos.y && rp->x == My_pos.x)
                        Dead = TRUE;
                else if (Field[rp->y][rp->x] > 1) {
                        mvaddch(rp->y, rp->x, HEAP);
                        rp->y = -1;
                        Num_robots--;
                        if (Waiting)
                                Wait_bonus++;
                        add_score(ROB_SCORE);
                }
                else {
                        mvaddch(rp->y, rp->x, ROBOT);
                        if (rp->y < Min.y)
                                Min.y = rp->y;
                        if (rp->x < Min.x)
                                Min.x = rp->x;
                        if (rp->y > Max.y)
                                Max.y = rp->y;
                        if (rp->x > Max.x)
                                Max.x = rp->x;
                }

#ifdef DEBUG
        standout();
        move(Min.y, Min.x);
        addch(inch());
        move(Max.y, Max.x);
        addch(inch());
        standend();
#endif /* DEBUG */
}

/*
 * add_score:
 *      Add a score to the overall point total
 */
void
add_score(int add)
{
        Score += add;
        move(Y_SCORE, X_SCORE);
        printw("%d", Score);
}

/*
 * sign:
 *      Return the sign of the number
 */
int
sign(int n)
{
        if (n < 0)
                return -1;
        else if (n > 0)
                return 1;
        else
                return 0;
}