"use strict";

const report = require("../../utils/report");
const ruleMessages = require("../../utils/ruleMessages");
const validateOptions = require("../../utils/validateOptions");

const ruleName = "no-empty-source";

const messages = ruleMessages(ruleName, {
  rejected: "Unexpected empty source"
});

const rule = function(actual) {
  return (root, result) => {
    const validOptions = validateOptions(result, ruleName, { actual });
    if (!validOptions) {
      return;
    }

    if (!/^\s*$/.test(root.source.input.css)) {
      return;
    }

    report({
      message: messages.rejected,
      node: root,
      result,
      ruleName
    });
  };
};

rule.ruleName = ruleName;
rule.messages = messages;
module.exports = rule;