/*
 *  Empire - A multi-player, client/server Internet based war game.
 *  Copyright (C) 1986-2016, 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.
 *
 *  ---
 *
 *  sect.c: Sector pre-write and post-read data massage
 *
 *  Known contributors to this file:
 *     Dave Pare, 1989
 *     Steve McClure, 1996
 *     Markus Armbruster, 2004-2016
 */

#include <config.h>

#include <ctype.h>
#include "file.h"
#include "game.h"
#include "lost.h"
#include "misc.h"
#include "nsc.h"
#include "optlist.h"
#include "player.h"
#include "prototypes.h"
#include "sect.h"
#include "update.h"
#include "xy.h"

void
sct_postread(int id, void *ptr)
{
    struct sctstr *sp = ptr;

    player->owner = (player->god || sp->sct_own == player->cnum);

    if (opt_MOB_ACCESS && sp->sct_own && sp->sct_type != SCT_SANCT
	&& !update_running)
	mob_inc_sect(sp, game_tick_to_now(&sp->sct_access));
}

void
sct_prewrite(int id, void *old, void *new)
{
    struct sctstr *oldsp = old;
    struct sctstr *sp = new;
    coord x, y;
    int mil, civs;
    natid own, prev_own;

    sctoff2xy(&x, &y, sp->sct_uid);
    if (CANT_HAPPEN(sp->sct_x != x || sp->sct_y != y)) {
	sp->sct_x = x;
	sp->sct_y = y;
    }

    bridge_damaged(sp);
    item_prewrite(sp->sct_item);

    mil = sp->sct_item[I_MILIT];
    civs = sp->sct_item[I_CIVIL];
    own = sp->sct_own;
    prev_own = oldsp->sct_own;

    if (!civs) {
	sp->sct_work = 100;
	sp->sct_loyal = 0;
	sp->sct_oldown = own;
    }

    /*
     * Without civilians, military and land units, revert to deity.
     * Note: would_abandon() must match this condition.
     */
    if (own && !civs && !mil && !has_units(sp->sct_x, sp->sct_y, own)
	&& !(sp->sct_flags & MOVE_IN_PROGRESS)) {
	own = sp->sct_own = 0;
	sp->sct_oldown = 0;
	sp->sct_mobil = 0;
	if (sp->sct_type == SCT_CAPIT || sp->sct_type == SCT_MOUNT)
	    caploss(sp, prev_own, "");
    }

    if (prev_own != own)
	lost_and_found(EF_SECTOR, prev_own, own, 0, sp->sct_x, sp->sct_y);
}

void
item_prewrite(short *item)
{
    i_type i;

    for (i = I_NONE + 1; i <= I_MAX; ++i) {
	if (CANT_HAPPEN(item[i] < 0))
	    item[i] = 0;
	else if (CANT_HAPPEN(item[i] > ITEM_MAX))
	    item[i] = ITEM_MAX;
    }
}

int
issector(char *arg)
{
    char c;

    while (0 != (c = *arg++))
	if (!isdigit(c) && !isspace(c) && (c != '/'))
	    return 1;

    return 0;
}