/* opt.c: a module used to parse command line options for newsfetch */
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <stdlib.h>

#include "newsfetch.h"

/* this has a lot of crap to bring in */
int get_commandline(int argc, char *argv[], char *dirname, char *rcname,
	      int *cleanup, int *wait_after_articles, int *wait_for_time,
		    int *command_flag, char *execute_command,
		    int *pipe_flag, char *pipe_command, int *only_list,
		    int *procmailrc, int *timeout)
{
	extern char *optarg;
	extern int optind, opterr, optopt, news_target;

	int c, i, tmp;
	char *multi_spPyY =
		"You can only specify one of the -s, -y, -Y, -p or -P option";

	while (1) {

/* Options (not all supported) 

   -d dirname to store news file
   -s print news to stdout
   -f alternative rc file
   -v| -V -> Print version and exit
   -c -> Do not update configuration file after downloading articles
   -w -> Wait for T sec  after downloading of N articles
   -t -> time
   -T -> timeout
   -x -> execute command after each group fetching
   -p -> pipe each article 
   -P -> pipe group
   -y -> pipe to procmail
   -Y -> pipe each article
 */
		c = getopt(argc, argv, "w:t:T:d:f:U:N:x:p:P:Y:yslVvchH-");
		if (c == EOF)
			break;

		switch (c) {
		case ':':
			fprintf(stderr, "missing parameter %s", optarg);
			break;

		case 'd':
			i = strlen(optarg);
			if (i < 100) {
				if (optarg[0] == '.') {
					/* for odd behavior of procmail */
					strcat(dirname, "/");
					strcat(dirname, optarg);
				} else
					strcpy(dirname, optarg);
				i = strlen(dirname);
				if (dirname[i - 1] == '/')
					dirname[i - 1] = '\0';
				if (!create_directory(dirname))
					exit(1);
			} else {
				fprintf(stderr, "dirname too long\n");
				exit(1);
			}
			break;

		case 'f':
			strcpy(rcname, optarg);
			break;

		case 'c':
			*cleanup = 0;
			break;

		case 'l':
			*only_list = 1;
			return (1);

		case 's':
			if (news_target) {
				fprintf(stderr, "%s\n", multi_spPyY);
				exit(1);
			}
			news_target = 2;
			break;

		case 'p':
			if (news_target) {
				fprintf(stderr, "%s\n", multi_spPyY);
				exit(1);
			}
			news_target = 3;
			strcpy(pipe_command, optarg);
			break;

		case 'P':
			if (news_target) {
				fprintf(stderr, "%s\n", multi_spPyY);
				exit(1);
			}
			news_target = 4;
			strcpy(pipe_command, optarg);
			break;

		case 'y':
			if (news_target) {
				fprintf(stderr, "%s\n", multi_spPyY);
				exit(1);
			}
			news_target = 3;
			*procmailrc = 1;
			strcpy(pipe_command, PROCMAIL_COMMAND);
			break;

		case 'Y':
			if (news_target) {
				fprintf(stderr, "%s\n", multi_spPyY);
				exit(1);
			}
			news_target = 3;
			*procmailrc = 1;
			strcpy(pipe_command, optarg);
			strcat(pipe_command, " ");
			break;

		case 'v':
		case 'V':
			exit(1);

		case 'h':
		case 'H':
			opt_help(argv[0]);
			return (1);	/* unreachable */

		case 'w':
			tmp = atoi(optarg);
			if (tmp == 0) {
				fprintf(stderr, 
				 "argument to -w should be valid number\n");
				exit(-1);
			} else
				(*wait_after_articles) = tmp;
			break;

		case 't':
			tmp = atoi(optarg);
			if (tmp == 0) {
				fprintf(stderr, 
				 "argument to -t should be valid number\n");
				exit(-1);
			}
			(*wait_for_time) = tmp;
			break;

		case 'T':
			/* not checking optarg */
			(*timeout) = atoi(optarg);
			break;

		case 'x':
			*command_flag = 1;
			strcpy(execute_command, optarg);
			break;

		case '?':
			exit(-1);

		case '-':
			opt_help(argv[0]);
			exit(1);
			return (-1);

		default:
			return (-1);
		}
	}

	return (1);
}

/* pretty obvious i'd say */
void opt_help(char *prog_name)
/* later on replace prog_name with a NAME definition in newsfetch.h */
{
	fprintf(stderr, "Usage: %s nntp_server [options]\n", prog_name);
	fprintf(stderr, "Options:\n");
	fprintf(stderr, "   [-clsyvV] [-d dirname] [-f rcfile] [-t N]\n"); 
	fprintf(stderr, "[-T timeout][-w M][-pPY filter][-x command]\n");
	exit(1);
}