/*
 *  Empire - A multi-player, client/server Internet based war game.
 *  Copyright (C) 1986-2015, Dave Pare, Jeff Bailey, Thomas Ruschak,
 *                Ken Stevens, Steve McClure, Markus Armbruster
 *
 *  Empire is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 *  ---
 *
 *  See files README, COPYING and CREDITS in the root of the source
 *  tree for related information and legal notices.  It is expected
 *  that future projects/authors will amend these files as needed.
 *
 *  ---
 *
 *  swap.c: Swap two sectors on the map
 *
 *  Known contributors to this file:
 *     Ken Stevens, 1995
 *     Markus Armbruster, 2006-2013
 */

#include <config.h>

#include "commands.h"

static void print_res(struct sctstr *);

/*
 * Syntax: swap <SECT> <SECT>
 */
int
swaps(void)
{
    struct sctstr secta, sectb, tmp;
    char buf[1024];
    char *p;
    int i;
    natid to;

    if (!(p = getstarg(player->argp[1], "First sector : ", buf)) ||
	!sarg_xy(p, &secta.sct_x, &secta.sct_y) ||
	!getsect(secta.sct_x, secta.sct_y, &secta))
	return RET_SYN;
    print_res(&secta);
    if (!(p = getstarg(player->argp[2], "Second sector : ", buf)) ||
	!sarg_xy(p, &sectb.sct_x, &sectb.sct_y) ||
	!getsect(sectb.sct_x, sectb.sct_y, &sectb))
	return RET_SYN;
    print_res(&sectb);
    if (!confirm("Are you sure these are the two sectors you wish to swap? "))
	return RET_FAIL;
    if (!check_sect_ok(&secta) || !check_sect_ok(&sectb))
	return RET_FAIL;
    for (i = 0; i <= (secta.sct_own != sectb.sct_own); i++) {
	to = i == 0 ? secta.sct_own : sectb.sct_own;
	if (to && to != player->cnum)
	    wu(0, to,
	       "Sector %s swapped with %s by an act of %s!\n",
	       xyas(secta.sct_x, secta.sct_y, to),
	       xyas(sectb.sct_x, sectb.sct_y, to),
	       cname(player->cnum));
    }
    tmp = secta;
    /* change the location of secta to that of sectb */
    secta.sct_x = sectb.sct_x;
    secta.sct_y = sectb.sct_y;
    ef_set_uid(EF_SECTOR, &secta, sectb.sct_uid);
    secta.sct_dist_x = sectb.sct_x;
    secta.sct_dist_y = sectb.sct_y;
    secta.sct_coastal = sectb.sct_coastal;
    /* change the location of sectb to where secta was */
    sectb.sct_x = tmp.sct_x;
    sectb.sct_y = tmp.sct_y;
    ef_set_uid(EF_SECTOR, &sectb, tmp.sct_uid);
    sectb.sct_dist_x = tmp.sct_x;
    sectb.sct_dist_y = tmp.sct_y;
    sectb.sct_coastal = tmp.sct_coastal;
    /* update coastal flag & put sectors */
    putsect(&sectb);
    set_coastal(&secta, sectb.sct_type, secta.sct_type);
    putsect(&secta);
    getsect(sectb.sct_x, sectb.sct_y, &sectb);
    set_coastal(&sectb, secta.sct_type, sectb.sct_type);
    putsect(&sectb);
    pr("done\n");
    return RET_OK;
}

static void
print_res(struct sctstr *sp)
{
    pr("own   sect        eff  min gold fert oil uran\n");

    pr("%3d ", sp->sct_own);

    prxy("%4d,%-4d", sp->sct_x, sp->sct_y);
    pr(" %c", dchr[sp->sct_type].d_mnem);
    if (sp->sct_newtype != sp->sct_type)
	pr("%c", dchr[sp->sct_newtype].d_mnem);
    else
	pr(" ");
    pr("%4d%%", sp->sct_effic);
    pr(" %4d", sp->sct_min);
    pr("%5d", sp->sct_gmin);
    pr("%5d", sp->sct_fertil);
    pr("%4d", sp->sct_oil);
    pr("%5d", sp->sct_uran);
    pr("\n");
}
