/**
   * @fileoverview unix-style formatter.
   * @author oshi-shinobu
   * @copyright 2015 oshi-shinobu. All rights reserved.
   */
  "use strict";
  
  //------------------------------------------------------------------------------
  // Helper Functions
  //------------------------------------------------------------------------------
  
  /**
   * Returns a canonical error level string based upon the error message passed in.
   * @param {object} message Individual error message provided by eslint
   * @returns {String} Error level string
   */
  function getMessageType(message) {
      if (message.fatal || message.severity === 2) {
          return "Error";
      } else {
          return "Warning";
      }
  }
  
  
  //------------------------------------------------------------------------------
  // Public Interface
  //------------------------------------------------------------------------------
  
  module.exports = function(results) {
  
      var output = "",
          total = 0;
  
      results.forEach(function(result) {
  
          var messages = result.messages;
          total += messages.length;
  
          messages.forEach(function(message) {
  
              output += result.filePath + ":";
              output += (message.line || 0) + ":";
              output += (message.column || 0) + ":";
              output += " " + message.message + " ";
              output += "[" + getMessageType(message) +
                        (message.ruleId ? "/" + message.ruleId : "") + "]";
              output += "
  ";
  
          });
  
      });
  
      if (total > 0) {
          output += "
  " + total + " problem" + (total !== 1 ? "s" : "");
      }
  
      return output;
  };