/**
   * @fileoverview A rule to set the maximum number of statements in a function.
   * @author Ian Christian Myers
   * @copyright 2013 Ian Christian Myers. All rights reserved.
   */
  
  "use strict";
  
  //------------------------------------------------------------------------------
  // Rule Definition
  //------------------------------------------------------------------------------
  
  module.exports = function(context) {
  
      //--------------------------------------------------------------------------
      // Helpers
      //--------------------------------------------------------------------------
  
      var functionStack = [],
          maxStatements = context.options[0] || 10;
  
      /**
       * When parsing a new function, store it in our function stack
       * @returns {void}
       * @private
       */
      function startFunction() {
          functionStack.push(0);
      }
  
      /**
       * Evaluate the node at the end of function
       * @param {ASTNode} node node to evaluate
       * @returns {void}
       * @private
       */
      function endFunction(node) {
          var count = functionStack.pop();
  
          if (count > maxStatements) {
              context.report(node, "This function has too many statements ({{count}}). Maximum allowed is {{max}}.",
                      { count: count, max: maxStatements });
          }
      }
  
      /**
       * Increment the count of the functions
       * @param {ASTNode} node node to evaluate
       * @returns {void}
       * @private
       */
      function countStatements(node) {
          functionStack[functionStack.length - 1] += node.body.length;
      }
  
      //--------------------------------------------------------------------------
      // Public API
      //--------------------------------------------------------------------------
  
      return {
          "FunctionDeclaration": startFunction,
          "FunctionExpression": startFunction,
          "ArrowFunctionExpression": startFunction,
  
          "BlockStatement": countStatements,
  
          "FunctionDeclaration:exit": endFunction,
          "FunctionExpression:exit": endFunction,
          "ArrowFunctionExpression:exit": endFunction
      };
  
  };
  
  module.exports.schema = [
      {
          "type": "integer"
      }
  ];