#include "config.h"

#include <assert.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <threads.h>

#include "trace.h"



thread_local enum TraceLevel
TRACE_LEVEL = TraceLevel_INFO;

thread_local FILE *
TRACE_OUTPUT = NULL;



void
set_level(const enum TraceLevel level) {
	assert(level >= TraceLevel_NONE);
	assert(level <= TraceLevel_ERROR);
	TRACE_LEVEL = level;
}

void
set_output(FILE *stream) {
	TRACE_OUTPUT = stream;
}

int
vtrace(
	const char *const file,
	const char *const function,
	const int lineno,
	const enum TraceLevel level,
	const char *restrict format,
	...
) {
	int rc = 0;

	// FIXME: test
	if (level < TRACE_LEVEL) {
		return rc;
	}

	if (TRACE_OUTPUT == NULL) {
		TRACE_OUTPUT = stderr;
	}

	// FIXME: weavify!
	if (fprintf(TRACE_OUTPUT, "%s:%s:%d: ", file, function, lineno) < 0) {
		perror(__FILE__ ":vtrace(): fprintf() < 0");
		rc = -1;
	}

	va_list args;
	va_start(args, format);
	if (vfprintf(TRACE_OUTPUT, format, args) < 0) {
		perror(__FILE__ ":vtrace(): vfprintf() < 0");
		rc = -1;
	}
	va_end(args);

	if (fprintf(TRACE_OUTPUT, "\n") < 0) {
		perror(__FILE__ ":vtrace(): fprintf() < 0");
		rc = -1;
	}

	return rc;
}