/**
   * @fileoverview A rule to ensure consistent quotes used in jsx syntax.
   * @author Mathias Schreck <https://github.com/lo1tuma>
   * @copyright 2015 Mathias Schreck
   */
  
  "use strict";
  
  //------------------------------------------------------------------------------
  // Requirements
  //------------------------------------------------------------------------------
  
  var astUtils = require("../ast-utils");
  
  //------------------------------------------------------------------------------
  // Constants
  //------------------------------------------------------------------------------
  
  var QUOTE_SETTINGS = {
      "prefer-double": {
          quote: "\"",
          description: "singlequote"
      },
      "prefer-single": {
          quote: "'",
          description: "doublequote"
      }
  };
  
  //------------------------------------------------------------------------------
  // Rule Definition
  //------------------------------------------------------------------------------
  
  module.exports = function(context) {
      var quoteOption = context.options[0] || "prefer-double",
          setting = QUOTE_SETTINGS[quoteOption];
  
      /**
       * Checks if the given string literal node uses the expected quotes
       * @param {ASTNode} node - A string literal node.
       * @returns {boolean} Whether or not the string literal used the expected quotes.
       * @public
       */
      function usesExpectedQuotes(node) {
          return node.value.indexOf(setting.quote) !== -1 || astUtils.isSurroundedBy(node.raw, setting.quote);
      }
  
      return {
          "JSXAttribute": function(node) {
              var attributeValue = node.value;
  
              if (attributeValue && astUtils.isStringLiteral(attributeValue) && !usesExpectedQuotes(attributeValue)) {
                  context.report(attributeValue, "Unexpected usage of {{description}}.", setting);
              }
          }
      };
  };
  
  module.exports.schema = [
      {
          "enum": [ "prefer-single", "prefer-double" ]
      }
  ];