text: "use strict";
  
  const blockString = require("../../utils/blockString");
  const hasBlock = require("../../utils/hasBlock");
  const hasEmptyBlock = require("../../utils/hasEmptyBlock");
  const hasEmptyLine = require("../../utils/hasEmptyLine");
  const isSingleLineString = require("../../utils/isSingleLineString");
  const optionsMatches = require("../../utils/optionsMatches");
  const report = require("../../utils/report");
  const ruleMessages = require("../../utils/ruleMessages");
  const validateOptions = require("../../utils/validateOptions");
  
  const ruleName = "block-closing-brace-empty-line-before";
  
  const messages = ruleMessages(ruleName, {
    expected: "Expected empty line before closing brace",
    rejected: "Unexpected empty line before closing brace"
  });
  
  const rule = function(expectation, options) {
    return (root, result) => {
      const validOptions = validateOptions(
        result,
        ruleName,
        {
          actual: expectation,
          possible: ["always-multi-line", "never"]
        },
        {
          actual: options,
          possible: {
            except: ["after-closing-brace"]
          },
          optional: true
        }
      );
      if (!validOptions) {
        return;
      }
  
      // Check both kinds of statements: rules and at-rules
      root.walkRules(check);
      root.walkAtRules(check);
  
      function check(statement) {
        // Return early if blockless or has empty block
        if (!hasBlock(statement) || hasEmptyBlock(statement)) {
          return;
        }
  
        // Get whitespace after ""}", ignoring extra semicolon
        const before = (statement.raws.after || "").replace(/;+/, "");
        if (before === undefined) {
          return;
        }
  
        // Calculate index
        const statementString = statement.toString();
        let index = statementString.length - 1;
        if (statementString[index - 1] === "\r") {
          index -= 1;
        }
  
        // Set expectation
        const expectEmptyLineBefore = (() => {
          const childNodeTypes = statement.nodes.map(item => item.type);
  
          // Reverse the primary options if `after-closing-brace` is set
          if (
            optionsMatches(options, "except", "after-closing-brace") &&
            (statement.type === "atrule" && childNodeTypes.indexOf("decl") === -1)
          ) {
            return expectation === "never" ? true : false;
          }
  
          return expectation === "always-multi-line" &&
            !isSingleLineString(blockString(statement))
            ? true
            : false;
        })();
  
        // Check for at least one empty line
        const hasEmptyLineBefore = hasEmptyLine(before);
  
        // Return if the expectation is met
        if (expectEmptyLineBefore === hasEmptyLineBefore) {
          return;
        }
  
        const message = expectEmptyLineBefore
          ? messages.expected
          : messages.rejected;
  
        report({
          message,
          result,
          ruleName,
          node: statement,
          index
        });
      }
    };
  };
  
  rule.ruleName = ruleName;
  rule.messages = messages;
  module.exports = rule;
  