/**
   * @fileoverview Rule to require sorting of variables within a single Variable Declaration block
   * @author Ilya Volodin
   */
  
  "use strict";
  
  //------------------------------------------------------------------------------
  // Rule Definition
  //------------------------------------------------------------------------------
  
  module.exports = function(context) {
  
      var configuration = context.options[0] || {},
          ignoreCase = configuration.ignoreCase || false;
  
      return {
          "VariableDeclaration": function(node) {
              node.declarations.reduce(function(memo, decl) {
                  if (decl.id.type === "ObjectPattern" || decl.id.type === "ArrayPattern") {
                      return memo;
                  }
  
                  var lastVariableName = memo.id.name,
                      currenVariableName = decl.id.name;
  
                  if (ignoreCase) {
                      lastVariableName = lastVariableName.toLowerCase();
                      currenVariableName = currenVariableName.toLowerCase();
                  }
  
                  if (currenVariableName < lastVariableName) {
                      context.report(decl, "Variables within the same declaration block should be sorted alphabetically");
                      return memo;
                  } else {
                      return decl;
                  }
              }, node.declarations[0]);
          }
      };
  };
  
  module.exports.schema = [
      {
          "type": "object",
          "properties": {
              "ignoreCase": {
                  "type": "boolean"
              }
          },
          "additionalProperties": false
      }
  ];