/*
 *  Empire - A multi-player, client/server Internet based war game.
 *  Copyright (C) 1986-2007, Dave Pare, Jeff Bailey, Thomas Ruschak,
 *                           Ken Stevens, Steve McClure
 *
 *  This program 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 2 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, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 *  ---
 *
 *  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.
 *
 *  ---
 *
 *  material.c: Tries to find materials for production
 * 
 *  Known contributors to this file:
 *     Ville Virrankoski, 1996
 *     Markus Armbruster, 2007
 */

#include <config.h>

#include "budg.h"
#include "player.h"
#include "update.h"

/*
 * Get build materials from sector SP.
 * BP is the sector's build pointer.
 * MVEC[] defines the materials needed to build 100%.
 * PCT is the percentage to build.
 * Adjust build percentage downwards so that available materials
 * suffice.  Remove the materials.
 * Return adjusted build percentage.
 */
int
get_materials(struct sctstr *sp, struct bp *bp, int *mvec, int pct)
{
    int i, amt;

    for (i = I_NONE + 1; i <= I_MAX; i++) {
	if (mvec[i] == 0)
	    continue;
	amt = bp_get_item(bp, sp, i);
	if (amt * 100 < mvec[i] * pct)
	    pct = amt * 100 / mvec[i];
    }

    for (i = I_NONE + 1; i <= I_MAX; i++) {
	if (mvec[i] == 0)
	    continue;
	amt = bp_get_item(bp, sp, i);
	amt -= roundavg(mvec[i] * pct / 100.0);
	if (CANT_HAPPEN(amt < 0))
	    amt = 0;
	bp_put_item(bp, sp, i, amt);
	if (!player->simulation)
	    sp->sct_item[i] = amt;
    }

    return pct;
}