#include "../src/logerr.c"

#include <assert.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>

#include "../src/testing.h"
#include "slurp.h"



static const char
FNAME[] = __FILE__ ".txt";



static int
test_flogerrf(void) {
	int rc = -1;

	test_start("flogerrf()");
	FILE *file = NULL;
	char *str = NULL;

	{
		testing("empty varargs");

		file = fopen(FNAME, "w");
		if (file == NULL) {
			perror("fopen(FNAME, \"w\")");
			goto out;
		}

		#line 100
		flogerrf(__FILE__, __func__, __LINE__, file,
			"");

		const int ret = fclose(file);
		file = NULL;
		if (ret) {
			perror("fclose(file)");
			goto out;
		}

		if (slurp_for_tests(FNAME, &str)) {
			perror("slurp_for_tests(FNAME, &str)");
			goto out;
		}

		const char expected[] =
			"tests/logerr.c:test_flogerrf:100: \n";
		assert(strcmp(expected, str) == 0);

		free(str);
		str = NULL;

		test_ok();
	}
	{
		testing("a newline only");

		file = fopen(FNAME, "w");
		if (file == NULL) {
			perror("fopen(FNAME, \"w\")");
			goto out;
		}

		#line 200
		flogerrf(__FILE__, __func__, __LINE__, file,
			"\n");

		const int ret = fclose(file);
		file = NULL;
		if (ret) {
			perror("fclose(file)");
			goto out;
		}

		if (slurp_for_tests(FNAME, &str)) {
			perror("slurp_for_tests(FNAME, &str)");
			goto out;
		}

		const char expected[] =
			"tests/logerr.c:test_flogerrf:200: \n\n";
		assert(strcmp(expected, str) == 0);

		free(str);
		str = NULL;

		test_ok();
	}
	{
		testing("static format string");

		file = fopen(FNAME, "w");
		if (file == NULL) {
			perror("fopen(FNAME, \"w\")");
			goto out;
		}

		#line 300
		flogerrf(__FILE__, __func__, __LINE__, file,
			"some static string");

		const int ret = fclose(file);
		file = NULL;
		if (ret) {
			perror("fclose(file)");
			goto out;
		}

		if (slurp_for_tests(FNAME, &str)) {
			perror("slurp_for_tests(FNAME, &str)");
			goto out;
		}

		const char expected[] =
			"tests/logerr.c:test_flogerrf:300: "
			"some static string\n";
		assert(strcmp(expected, str) == 0);

		free(str);
		str = NULL;

		test_ok();
	}
	{
		testing("single arg format string");

		file = fopen(FNAME, "w");
		if (file == NULL) {
			perror("fopen(FNAME, \"w\")");
			goto out;
		}

		#line 400
		flogerrf(__FILE__, __func__, __LINE__, file,
			"fn(%s)", "an-arg");

		const int ret = fclose(file);
		file = NULL;
		if (ret) {
			perror("fclose(file)");
			goto out;
		}

		if (slurp_for_tests(FNAME, &str)) {
			perror("slurp_for_tests(FNAME, &str)");
			goto out;
		}

		const char expected[] =
			"tests/logerr.c:test_flogerrf:400: fn(an-arg)\n";
		assert(strcmp(expected, str) == 0);

		free(str);
		str = NULL;

		test_ok();
	}
	{
		testing("multiple format strings");

		file = fopen(FNAME, "w");
		if (file == NULL) {
			perror("fopen(FNAME, \"w\")");
			goto out;
		}

		#line 500
		flogerrf(__FILE__, __func__, __LINE__, file,
			"int (%d), string (%s) and char (%c)",
			123,
			"another-str",
			'z');

		const int ret = fclose(file);
		file = NULL;
		if (ret) {
			perror("fclose(file)");
			goto out;
		}

		if (slurp_for_tests(FNAME, &str)) {
			perror("slurp_for_tests(FNAME, &str)");
			goto out;
		}

		const char expected[] =
			"tests/logerr.c:test_flogerrf:500: "
			"int (123), string (another-str) and char (z)\n";
		assert(strcmp(expected, str) == 0);

		free(str);
		str = NULL;

		test_ok();
	}

	rc = 0;
out:
	if (str != NULL) {
		free(str);
		str = NULL;
	}
	if (file != NULL) {
		if (fclose(file)) {
			perror("fclose(file)");
			rc = -1;
		}
	}
	return rc;
}

static int
test_logerr(void) {
	int rc = -1;

	test_start("logerr()");

	FILE *file = fopen("/dev/null", "w");
	if (file == NULL) {
		perror("fopen(\"/dev/null\", \"w\")");
		goto out;
	}
	logerr_set_stream(file);

	{
		testing("can be called with an empty string");

		logerr("");

		test_ok();
	}
	{
		testing("can be called with a static string");

		logerr("some err");

		test_ok();
	}
	{
		testing("can be called with a formatted string");

		logerr("some err: %s", strerror(errno));

		test_ok();
	}
	{
		testing("can be called with formatting arguments");

		logerr("int: %d\tstr: %s", 123, "an example string");

		test_ok();
	}

	rc = 0;
out:
	logerr_set_stream(NULL);
	if (file != NULL) {
		if (fclose(file)) {
			perror("fclose(file)");
			rc = -1;
		}
	}
	return rc;
}


int
main(void) {
	int rc = EXIT_FAILURE;

	if (test_flogerrf()) {
		perror("test_flogerrf()");
		goto out;
	}

	if (test_logerr()) {
		perror("test_logerr()");
		goto out;
	}

	rc = EXIT_SUCCESS;
out:
	return rc;
}