#include "util.hpp"

#include <errno.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>

struct strftime_cache {
   time_t time;
   char buf[128];
};

static void log_(char const *log_type, FILE *stream, char const *fmt,
                 va_list args) {
   static struct strftime_cache strft;

   time_t t = time(NULL);
   if (t != strft.time) {
      strft.time = t;
      struct tm tm;
      struct tm *tmp = localtime_r(&t, &tm);
      strftime(strft.buf, sizeof(strft.buf), "%Y-%m-%dT%H:%M:%S", tmp);
   }

   fputs(program_invocation_short_name, stream);
   fputs("  ", stream);
   fputs(strft.buf, stream);
   fputs("  ", stream);
   fputs(log_type, stream);
   fputs("  ", stream);
   vfprintf(stream, fmt, args);
   fputs("\n", stream);
}

void lognotice(char const *fmt, ...) {
   va_list a;
   va_start(a, fmt);
   log_("notice", stdout, fmt, a);
   va_end(a);
}

void logerror(char const *fmt, ...) {
   va_list a;
   va_start(a, fmt);
   log_("error", stderr, fmt, a);
   va_end(a);
}

void fatal(char const *fmt, ...) {
   va_list a;
   va_start(a, fmt);
   log_("fatal", stderr, fmt, a);
   va_end(a);
   abort();
}

#ifdef DEBUG_OUTPUT
void logdebug(char const *fmt, ...) {
   va_list a;
   va_start(a, fmt);
   log_("debug", stdout, fmt, a);
   va_end(a);
}
#endif