#include "../src/trace.c"

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

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



static const char *const
FNAME = __FILE__ ".txt";



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

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

	{
		testing("empty varargs");

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

		#line 100
		vtrace(__FILE__, __func__, __LINE__,
			TraceLevel_INFO, "");

		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 *const expected =
			"tests/trace.c:test_vtrace:100: \n";
		printf("\n");
		printf("expected: >>>%s<<<\n", expected);
		printf("str:      >>>%s<<<\n", str);
		// FIXME
		assert(strcmp(expected, str) == 0);

		freeit((void *)&str);

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

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

		#line 200
		vtrace(__FILE__, __func__, __LINE__,
			TraceLevel_INFO,
			"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 *const expected =
			"tests/trace.c:test_vtrace:200: "
			"int (123), string (another-str) and char (z)\n";
		printf("\n");
		printf("expected: >>>%s<<<\n", expected);
		printf("str:      >>>%s<<<\n", str);
		// FIXME
		// assert(strcmp(expected, str) == 0);

		freeit((void *)&str);

		test_ok();
	}
	{
		testing("insufficient trace level");

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

		vtrace(__FILE__, __func__, __LINE__,
			TraceLevel_INFO, "ignored");

		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;
		}

		// FIXME
		// assert(strcmp("", str) == 0);

		freeit((void *)&str);

		test_ok();
	}

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

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

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

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

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

		trace(TraceLevel_INFO, "");

		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;
		}

		// FIXME
		/*
		const char *const expected =
			"tests/trace.c:test_vtrace:200: "
			"int (123), string (another-str) and char (z)\n";
		*/
		// assert(strcmp(expected, str) == 0);

		freeit((void *)&str);

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

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

		// FIXME
		// trace(TraceLevel_INFO, "int: %d\tstr: %s", 123, "an example 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 *const expected =
			"";
		assert(strcmp(expected, str) == 0);
		*/

		freeit((void *)&str);

		test_ok();
	}

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


int
main(void) {
	int rc = EXIT_FAILURE;

	TRACE_LEVEL = TraceLevel_INFO;
	TRACE_LEVEL = TraceLevel_DEBUG;

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

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

	rc = EXIT_SUCCESS;
out:
	return rc;
}