/*
 * Copyright (C) 2016 Andy Spencer <andy753421@gmail.com>
 *
 * 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 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/>.
 */

#include <stdlib.h>
#include <stdio.h>
#include <getopt.h>

#include "util.h"
#include "args.h"
#include "date.h"
#include "cal.h"

/* Global data */
int PRINT  = 0;

/* Local data */
char **calendars = NULL;

/* Options */
static char *short_options = "hp::d";

struct option long_options[] = {
	{"help",   0, NULL, 'h'},
	{"print",  2, NULL, 'p'},
};

/* Usage */
static void usage(char *name)
{
	printf("Usage:\n");
	printf("  %s [OPTION...] [CALENDAR]\n", name);
	printf("\n");
	printf("Options:\n");
	printf("  -h, --help        Print usage information\n");
	printf("  -p, --print=[dw]  Show upcomming events\n");
}

/* Initialize */
void args_setup(int argc, char **argv)
{
	/* Parse arguments */
	while (1) {
		int c = getopt_long(argc, argv,
				short_options, long_options, NULL);
		if (c == -1)
			break;
		switch (c) {
			case 'h':
				usage(argv[0]);
				exit(0);
				break;
			case 'p':
				PRINT = match(optarg, NULL)   ? 1 :
				        match(optarg, "d")    ? 1 :
				        match(optarg, "day")  ? 1 :
				        match(optarg, "w")    ? 7 :
				        match(optarg, "week") ? 7 : -1;
				break;
		}
	}

	/* Save default calendar */
	calendars = &argv[optind];

	/* Validate arguments */
	if (PRINT < 0)
		error("Unknown print: %s\n", optarg);

	/* Load calendars */
	for (int i = 0; calendars[i]; i++)
		cal_config("ical", calendars[i], "location", calendars[i]);
}

void args_start(void)
{
	/* Focus the default calendar */
	if (calendars[0]) {
		event_t *event = EVENTS;
		date_t   start = {SEL.year, SEL.month, SEL.day, 0, 0};
		while (event && compare(&start, &event->start) > 0)
			event = event->next;
		while (event && !match(calendars[0], event->cal->name))
			event = event->next;
		if (!event)
			event = EVENTS;
		while (event && !match(calendars[0], event->cal->name))
			event = event->next;
		if (event)
			SEL = event->start;
	}
}