/*-
 * 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;

	/**
	 * File to read location from, `NULL` for default
	 */
	char *file;
};


static int
geofile_create(struct location_state **state_out)
{
	*state_out = emalloc(sizeof(**state_out));
	(*state_out)->file = NULL;
	return 0;
}


GCC_ONLY(__attribute__((__pure__)))
static int
geofile_start(struct location_state *state)
{
	struct libgeome_data data = {.requested_data = LIBGEOME_DATUM_LATITUDE | LIBGEOME_DATUM_LONGITUDE};
	struct libgeome_context ctx;
	int r;
	libgeome_basic_context(&ctx, argv0);
	r = libgeome_get_from_file(&ctx, &data, state->file);
	free(state->file);
	state->file = NULL;
	if (r || data.requested_data != (LIBGEOME_DATUM_LATITUDE | LIBGEOME_DATUM_LONGITUDE))
		return -1;
	state->location.latitude = data.latitude;
	state->location.longitude = data.longitude;
	return 0;
}


static void
geofile_free(struct location_state *state)
{
	free(state->file);
	free(state);
}


static void
geofile_print_help(void)
{
	printf(_("Specify location via file.\n"));
	printf("\n");

	printf("  file=%s   %s\n", _("FILE  "), _("File to read location from (empty for default)"));
	printf("\n");
}


static int
geofile_set_option(struct location_state *state, const char *key, const char *value)
{
	if (!strcasecmp(key, "file")) {
		free(state->file);
		state->file = *value ? estrdup(value) : NULL;
		return 0;
	} else {
		weprintf(_("Unknown provider parameter: `%s'."), key);
		return -1;
	}
}


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


static int
geofile_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 geofile_location_provider = LOCATION_PROVIDER_INIT("geofile", geofile);