"use strict";

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

const ruleName = "media-feature-name-no-vendor-prefix";

const messages = ruleMessages(ruleName, {
  rejected: "Unexpected vendor-prefix"
});

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

    root.walkAtRules(/^media$/i, atRule => {
      const params = atRule.params;

      if (!isAutoprefixable.mediaFeatureName(params)) {
        return;
      }
      const matches = atRule.toString().match(/[a-z-]+device-pixel-ratio/gi);

      if (!matches) {
        return;
      }

      matches.forEach(match => {
        report({
          message: messages.rejected,
          node: atRule,
          word: match,
          result,
          ruleName
        });
      });
    });
  };
};

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