/*
 * (C) 2013 by Holger Hans Peter Freyther
 * (C) 2022 by Harald Welte <laforge@osmocom.org>
 * All Rights Reserved
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Affero 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

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

#include <osmocom/msc/debug.h>
#include <osmocom/smpp/smpp_smsc.h>
#include <osmocom/core/application.h>
#include <osmocom/core/backtrace.h>

struct coding_test {
	uint8_t dcs;
	uint8_t coding;
	int	mode;
	int	res;
};

static struct coding_test codecs[] = {
	{ .dcs = 0xf6		, .coding = 0x02, .mode = MODE_8BIT,	.res = 0  },
	{ .dcs = 0xf2		, .coding = 0x01, .mode = MODE_7BIT,	.res = 0  },
	{ .dcs = 0x02		, .coding = 0x01, .mode = MODE_7BIT,	.res = 0  },
	{ .dcs = 0x06		, .coding = 0x02, .mode = MODE_8BIT,	.res = 0  },
	{ .dcs = 0x0A		, .coding = 0x08, .mode = MODE_8BIT,	.res = 0  },
	{ .dcs = 0x0E		, .coding = 0xFF, .mode = 0xFF,		.res = -1 },
	{ .dcs = 0xE0		, .coding = 0xFF, .mode = 0xFF,		.res = -1 },
};

static void test_coding_scheme(void)
{
	int i;
	printf("Testing coding scheme support\n");

	for (i = 0; i < ARRAY_SIZE(codecs); ++i) {
		uint8_t coding;
		int mode, res;

		res = smpp_determine_scheme(codecs[i].dcs, &coding, &mode);
		OSMO_ASSERT(res == codecs[i].res);
		if (res != -1) {
			OSMO_ASSERT(mode == codecs[i].mode);
			OSMO_ASSERT(coding == codecs[i].coding);
		}
	}
}

static const char *smpp_time_tests[] = {
	"\0",
	"220517175524000+",
	"220517175524000-",
	"220517175524004+",	/* 1 hour advanced compared to GMT */
	"220517175524004-",	/* 1 hour retarded compared to GMT */
	"000000010000000R",	/* 1 hour */
	"000001000000000R",	/* 1 day */
};

static void test_smpp_parse_time_format(void)
{
	time_t t_now = 1652745600;	/* 2022-05-17 00:00:00 UTC */
	char *orig_tz;

	printf("Testing SMPP time format parser\n");

	/* relative time format conversion depends on the local time */
	orig_tz = getenv("TZ");
	setenv("TZ", "UTC", 1);

	for (unsigned int i = 0; i < ARRAY_SIZE(smpp_time_tests); i++) {
		time_t t = smpp_parse_time_format(smpp_time_tests[i], &t_now);
		char buf[32];
		strftime(buf, sizeof(buf), "%Y-%m-%d %H:%M:%S", gmtime(&t));
		printf("'%s': %ld == %s\n", smpp_time_tests[i], t, buf);
	}

	if (orig_tz)
		setenv("TZ", orig_tz, 1);
	else
		unsetenv("TZ");

}

static const struct log_info_cat smpp_mirror_default_categories[] = {
	[DSMPP] = {
		.name = "DSMPP",
		.description = "SMPP interface for external SMS apps",
		.enabled = 1, .loglevel = LOGL_DEBUG,
	},
};

const struct log_info log_info = {
	.cat = smpp_mirror_default_categories,
	.num_cat = ARRAY_SIZE(smpp_mirror_default_categories),
};

int main(int argc, char **argv)
{
	void *ctx = talloc_named_const(NULL, 0, "smpp_test");
	osmo_init_logging2(ctx, &log_info);
	log_set_use_color(osmo_stderr_target, 0);
	log_set_print_filename2(osmo_stderr_target, LOG_FILENAME_NONE);
	log_set_print_category(osmo_stderr_target, 0);
	log_set_print_category_hex(osmo_stderr_target, 0);

	test_coding_scheme();
	test_smpp_parse_time_format();

	return EXIT_SUCCESS;
}