/* @flow */
"use strict";

const getPreviousNonSharedLineCommentNode = require("./getPreviousNonSharedLineCommentNode");
const hasBlock = require("./hasBlock");

module.exports = function(atRule /*: postcss$atRule*/) /*: boolean*/ {
  if (atRule.type !== "atrule") {
    return false;
  }

  const previousNode = getPreviousNonSharedLineCommentNode(atRule);

  if (previousNode === undefined) {
    return false;
  }

  return (
    previousNode.type === "atrule" &&
    !hasBlock(previousNode) &&
    !hasBlock(atRule)
  );
};