/* sxiv: options.c
 * Copyright (c) 2011 Bert Muennich <muennich at informatik.hu-berlin.de>
 *
 * 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.
 */

#define _XOPEN_SOURCE

#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <unistd.h>

#include "options.h"
#include "util.h"
#include "config.h"

options_t _options;
const options_t *options = (const options_t*) &_options;

void print_usage() {
	printf("usage: sxiv [-cdFfhpqrstvZ] [-g GEOMETRY] [-n NUM] [-z ZOOM] FILES...\n");
}

void print_version() {
	printf("sxiv %s - simple x image viewer\n", VERSION);
}

void parse_options(int argc, char **argv) {
	float z;
	int n, opt;

	_options.startnum = 0;

	_options.scalemode = SCALE_MODE;
	_options.zoom = 1.0;
	_options.aa = 1;
	_options.thumbnails = 0;

	_options.fixed = 0;
	_options.fullscreen = 0;
	_options.geometry = NULL;

	_options.quiet = 0;
	_options.clean_cache = 0;
	_options.recursive = 0;

	while ((opt = getopt(argc, argv, "cdFfg:hn:pqrstvZz:")) != -1) {
		switch (opt) {
			case '?':
				print_usage();
				exit(1);
			case 'c':
				_options.clean_cache = 1;
				break;
			case 'd':
				_options.scalemode = SCALE_DOWN;
				break;
			case 'F':
				_options.fixed = 1;
				break;
			case 'f':
				_options.fullscreen = 1;
				break;
			case 'g':
				_options.geometry = optarg;
				break;
			case 'h':
				print_usage();
				exit(0);
			case 'n':
				if (!sscanf(optarg, "%d", &n) || n < 1) {
					fprintf(stderr, "sxiv: invalid argument for option -n: %s\n",
					        optarg);
					exit(1);
				} else {
					_options.startnum = n - 1;
				}
				break;
			case 'p':
				_options.aa = 0;
				break;
			case 'q':
				_options.quiet = 1;
				break;
			case 'r':
				_options.recursive = 1;
				break;
			case 's':
				_options.scalemode = SCALE_FIT;
				break;
			case 't':
				_options.thumbnails = 1;
				break;
			case 'v':
				print_version();
				exit(0);
			case 'Z':
				_options.scalemode = SCALE_ZOOM;
				_options.zoom = 1.0;
				break;
			case 'z':
				_options.scalemode = SCALE_ZOOM;
				if (!sscanf(optarg, "%f", &z) || z < 0) {
					fprintf(stderr, "sxiv: invalid argument for option -z: %s\n",
					        optarg);
					exit(1);
				} else {
					_options.zoom = z / 100.0;
				}
				break;
		}
	}

	_options.filenames = argv + optind;
	_options.filecnt = argc - optind;
	_options.from_stdin = _options.filecnt == 1 &&
	                      strcmp(_options.filenames[0], "-") == 0;
}