/*      $OpenBSD: shield.c,v 1.9 2016/01/07 14:37:51 mestre Exp $       */
/*      $NetBSD: shield.c,v 1.4 1995/04/24 12:26:09 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 <stdio.h>

#include "getpar.h"
#include "trek.h"

/*
**  SHIELD AND CLOAKING DEVICE CONTROL
**
**      'f' is one for auto shield up (in case of Condition RED),
**      zero for shield control, and negative one for cloaking
**      device control.
**
**      Called with an 'up' or 'down' on the same line, it puts
**      the shields/cloak into the specified mode.  Otherwise it
**      reports to the user the current mode, and asks if she wishes
**      to change.
**
**      This is not a free move.  Hits that occur as a result of
**      this move appear as though the shields are half up/down,
**      so you get partial hits.
*/

const struct cvntab Udtab[] =
{
        { "u",          "p",            (cmdfun)1,      0 },
        { "d",          "own",          (cmdfun)0,      0 },
        { NULL,         NULL,           NULL,           0 }
};

void
shield(int f)
{
        int                     i;
        const struct cvntab     *r;
        char                    s[100];
        const char              *device, *dev2, *dev3;
        int                     ind;
        char                    *stat;

        if (f > 0 && (Ship.shldup || damaged(SRSCAN)))
                return;
        if (f < 0)
        {
                /* cloaking device */
                if (Ship.ship == QUEENE)
                {
                        printf("Ye Faire Queene does not have the cloaking device.\n");
                        return;
                }
                device = "Cloaking device";
                dev2 = "is";
                ind = CLOAK;
                dev3 = "it";
                stat = &Ship.cloaked;
        }
        else
        {
                /* shields */
                device = "Shields";
                dev2 = "are";
                dev3 = "them";
                ind = SHIELD;
                stat = &Ship.shldup;
        }
        if (damaged(ind))
        {
                if (f <= 0)
                        out(ind);
                return;
        }
        if (Ship.cond == DOCKED)
        {
                printf("%s %s down while docked\n", device, dev2);
                return;
        }
        if (f <= 0 && !testnl())
        {
                r = getcodpar("Up or down", Udtab);
                i = (long) r->value;
        }
        else
        {
                if (*stat)
                        (void)snprintf(s, sizeof s,
                            "%s %s up.  Do you want %s down", device, dev2, dev3);
                else
                        (void)snprintf(s, sizeof s,
                            "%s %s down.  Do you want %s up", device, dev2, dev3);
                if (!getynpar(s))
                        return;
                i = !*stat;
        }
        if (*stat == i)
        {
                printf("%s already ", device);
                if (i)
                        printf("up\n");
                else
                        printf("down\n");
                return;
        }
        if (i)
        {
                if (f >= 0)
                        Ship.energy -= Param.shupengy;
                else
                        Ship.cloakgood = 0;
        }
        Move.free = 0;
        if (f >= 0)
                Move.shldchg = 1;
        *stat = i;
}