let Utility = {};

Utility.delay = function(milliseconds) {
  return new Promise(resolve => setTimeout(resolve, milliseconds));
}

Utility.meta = function(key) {
  return $("meta[name=" + key + "]").attr("content");
}

Utility.test_max_width = function(width) {
  if (!window.matchMedia) {
    return false;
  }
  var mq = window.matchMedia('(max-width: ' + width + 'px)');
  return mq.matches;
}

Utility.notice_timeout_id = undefined;

Utility.notice = function(msg, permanent) {
  $('#notice').addClass("ui-state-highlight").removeClass("ui-state-error").fadeIn("fast").children("span").html(msg);

  if (Utility.notice_timeout_id !== undefined) {
    clearTimeout(Utility.notice_timeout_id)
  }
  if (!permanent) {
    Utility.notice_timeout_id = setTimeout(function() {
      $("#close-notice-link").click();
      Utility.notice_timeout_id = undefined;
    }, 6000);
  }
}

Utility.error = function(msg) {
  $('#notice').removeClass("ui-state-highlight").addClass("ui-state-error").fadeIn("fast").children("span").html(msg);

  if (Utility.notice_timeout_id !== undefined) {
    clearTimeout(Utility.notice_timeout_id)
  }
}

Utility.dialog = function(title, html) {
  const $dialog = $(html).dialog({
    title: title,
    width: 700,
    modal: true,
    close: function() {
      // Defer removing the dialog to avoid detaching the <form> tag before the
      // form is submitted (which would prevent the submission from going through).
      $(() => $dialog.dialog("destroy"));
    },
    buttons: {
      "Submit": function() {
        $dialog.find("form").submit();
      },
      "Cancel": function() {
        $dialog.dialog("close");
      }
    }
  });

  $dialog.find("form").on("submit.danbooru", function() {
    $dialog.dialog("close");
  });
}

Utility.keydown = function(keys, namespace, handler) {
  if (Utility.meta("enable-js-navigation") === "true") {
    $(document).on("keydown.danbooru." + namespace, null, keys, handler);
  }
};

Utility.is_subset = function(array, subarray) {
  var all = true;

  $.each(subarray, function(i, val) {
    if ($.inArray(val, array) === -1) {
      all = false;
    }
  });

  return all;
}

Utility.intersect = function(a, b) {
  a = a.slice(0).sort();
  b = b.slice(0).sort();
  var result = [];
  while (a.length > 0 && b.length > 0) {
    if (a[0] < b[0]) {
      a.shift();
    } else if (a[0] > b[0]) {
      b.shift();
    } else {
      result.push(a.shift());
      b.shift();
    }
  }
  return result;
}

Utility.regexp_escape = function(string) {
  return string.replace(/([.?*+^$[\]\\(){}|-])/g, "\\$1");
}

$.fn.selectEnd = function() {
  return this.each(function() {
    this.focus();
    this.setSelectionRange(this.value.length, this.value.length);
  })
}

export default Utility