/*-
 * redshift-ng - Automatically adjust display colour temperature according the Sun
 * 
 * Copyright (c) 2009-2018        Jon Lund Steffensen <jonlst@gmail.com>
 * Copyright (c) 2014-2016, 2025  Mattias Andrée <m@maandree.se>
 * 
 * redshift-ng 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.
 * 
 * redshift-ng 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 redshift-ng.  If not, see <http://www.gnu.org/licenses/>.
 */
#include "common.h"


struct location_state {
	/**
	 * The loaded location
	 */
	struct location location;
};


static int
timezone_create(struct location_state **state_out)
{
	*state_out = emalloc(sizeof(**state_out));
	return 0;
}


GCC_ONLY(__attribute__((__pure__)))
static int
timezone_start(struct location_state *state)
{
	struct libgeome_data data;
	struct libgeome_context ctx;
	int r;
	libgeome_basic_context(&ctx, argv0);

	data.requested_data = LIBGEOME_DATUM_LATITUDE | LIBGEOME_DATUM_LONGITUDE;
	r = libgeome_get_from_timezone(&ctx, &data);
	if (r) {
		data.requested_data = LIBGEOME_DATUM_LATITUDE | LIBGEOME_DATUM_LONGITUDE;
		r = libgeome_get_from_time(&ctx, &data);
	}

	if (r || !(data.requested_data & LIBGEOME_DATUM_LONGITUDE))
		return -1;
	if (data.requested_data & LIBGEOME_DATUM_LATITUDE)
		state->location.latitude = data.latitude;
	else
		state->location.latitude = 0;
	state->location.longitude = data.longitude;
	return 0;
}


static void
timezone_free(struct location_state *state)
{
	free(state);
}


static void
timezone_print_help(void)
{
	printf(_("Get rough location from timezone.\n"));
	printf("\n");
}


static int
timezone_set_option(struct location_state *state, const char *key, const char *value)
{
	(void) state;
	(void) value;
	weprintf(_("Unknown provider parameter: `%s'."), key);
	return -1;
}


static int
timezone_get_fd(struct location_state *state)
{
	(void) state;
	return -1;
}


static int
timezone_fetch(struct location_state *state, struct location *location_out, int *available_out)
{
	*location_out = state->location;
	*available_out = 1;
	return 0;
}


const struct location_provider timezone_location_provider = LOCATION_PROVIDER_INIT("timezone", timezone);