/*
 * Copyright (C) 2003-2007 Imendio AB
 * Copyright (C) 2007-2012 Collabora Ltd.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * Authors: Richard Hult <richard@imendio.com>
 */

#include "config.h"
#include "empathy-time.h"

#include <glib/gi18n-lib.h>

/* Note: EmpathyTime is always in UTC. */

gint64
empathy_time_get_current (void)
{
  GDateTime *now;
  gint64 result;

  now = g_date_time_new_now_utc ();
  result = g_date_time_to_unix (now);
  g_date_time_unref (now);

  return result;
}

/* Converts the UTC timestamp to a string, also in UTC.
 * Returns NULL on failure. */
gchar *
empathy_time_to_string_utc (gint64 t,
    const gchar *format)
{
  GDateTime *d;
  char *result;

  g_return_val_if_fail (format != NULL, NULL);

  d = g_date_time_new_from_unix_utc (t);
  result = g_date_time_format (d, format);
  g_date_time_unref (d);

  return result;
}

/* Converts the UTC timestamp to a string, in local time.
 * Returns NULL on failure. */
gchar *
empathy_time_to_string_local (gint64 t,
    const gchar *format)
{
  GDateTime *d, *local;
  gchar *result;

  g_return_val_if_fail (format != NULL, NULL);

  d = g_date_time_new_from_unix_utc (t);
  local = g_date_time_to_local (d);
  g_date_time_unref (d);

  result = g_date_time_format (local, format);
  g_date_time_unref (local);

  return result;
}

gchar *
empathy_duration_to_string (guint seconds)
{
  if (seconds < 60)
    {
      return g_strdup_printf (ngettext ("%d second ago",
        "%d seconds ago", seconds), seconds);
    }
  else if (seconds < (60 * 60))
    {
      seconds /= 60;
      return g_strdup_printf (ngettext ("%d minute ago",
        "%d minutes ago", seconds), seconds);
    }
  else if (seconds < (60 * 60 * 24))
    {
      seconds /= 60 * 60;
      return g_strdup_printf (ngettext ("%d hour ago",
        "%d hours ago", seconds), seconds);
    }
  else if (seconds < (60 * 60 * 24 * 7))
    {
      seconds /= 60 * 60 * 24;
      return g_strdup_printf (ngettext ("%d day ago",
        "%d days ago", seconds), seconds);
    }
  else if (seconds < (60 * 60 * 24 * 30))
    {
      seconds /= 60 * 60 * 24 * 7;
      return g_strdup_printf (ngettext ("%d week ago",
        "%d weeks ago", seconds), seconds);
    }
  else
    {
      seconds /= 60 * 60 * 24 * 30;
      return g_strdup_printf (ngettext ("%d month ago",
        "%d months ago", seconds), seconds);
    }
}

gchar  *
empathy_time_to_string_relative (gint64 t)
{
  GDateTime *now, *then;
  gint   seconds;
  GTimeSpan delta;
  gchar *result;

  now = g_date_time_new_now_utc ();
  then = g_date_time_new_from_unix_utc (t);

  delta = g_date_time_difference (now, then);
  seconds = delta / G_TIME_SPAN_SECOND;

  if (seconds > 0)
    result = empathy_duration_to_string (seconds);
  else
    result = g_strdup (_("in the future"));

  g_date_time_unref (now);
  g_date_time_unref (then);

  return result;
}
