/*
# This file is part of the Astrometry.net suite.
# Licensed under a 3-clause BSD style license - see LICENSE
*/

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

#include "datalog.h"

static data_log_t g_datalog;

static data_log_t* get_logger() {
	return &g_datalog;
}

void data_log_init(int level) {
	data_log_t* log = get_logger();
	log->level = level;
	log->f = stdout;
	log->mask = 0;
	log->nitems = 0;
}

void data_log_start() {
	data_log_t* log = get_logger();
	fprintf(log->f, "[\n");
}

void data_log_end() {
	data_log_t* log = get_logger();
	fprintf(log->f, "]\n");
}

void data_log_start_item(data_mask_t mask, int level, const char* name) {
	data_log_t* log = get_logger();
	data_log(mask, level, "%s{\"%s\": ", (log->nitems ? ",\n" : ""), name);
}

void data_log_end_item(data_mask_t mask, int level) {
	data_log_t* log = get_logger();
	data_log(mask, level, "}");
	if (data_log_passes(mask, level))
		log->nitems++;
}

void data_log_enable(data_mask_t mask) {
	data_log_t* log = get_logger();
	log->mask |= mask;
}

void data_log_enable_all() {
	data_log_t* log = get_logger();
	log->mask |= DATALOG_MASK_ALL;
}

void data_log_set_level(int level) {
	data_log_t* log = get_logger();
	log->level = level;
}

void data_log_to(FILE* fid) {
	data_log_t* log = get_logger();
	log->f = fid;
}

anbool data_log_passes(data_mask_t mask, int level) {
	data_log_t* log = get_logger();
	if (level > log->level)
		return FALSE;
	if ((mask & log->mask) == 0)
		return FALSE;
	return TRUE;
}

void data_log(data_mask_t mask, int level, const char* format, ...) {
	data_log_t* log = get_logger();
	va_list va;
	if (!data_log_passes(mask, level))
		return;
	va_start(va, format);
	vfprintf(log->f, format, va);
	va_end(va);
	fflush(log->f);
}