/**
   * @fileoverview Visual Studio compatible formatter
   * @author Ronald Pijnacker
   */
  
  "use strict";
  
  //------------------------------------------------------------------------------
  // Helper Functions
  //------------------------------------------------------------------------------
  
  /**
   * Returns the severity of warning or error
   * @param {Object} message message object to examine
   * @returns {string} severity level
   * @private
   */
  function getMessageType(message) {
      if (message.fatal || message.severity === 2) {
          return "error";
      }
      return "warning";
  
  }
  
  
  //------------------------------------------------------------------------------
  // Public Interface
  //------------------------------------------------------------------------------
  
  module.exports = function(results) {
  
      let output = "",
          total = 0;
  
      results.forEach(result => {
  
          const messages = result.messages;
  
          total += messages.length;
  
          messages.forEach(message => {
  
              output += result.filePath;
              output += `(${message.line || 0}`;
              output += message.column ? `,${message.column}` : "";
              output += `): ${getMessageType(message)}`;
              output += message.ruleId ? ` ${message.ruleId}` : "";
              output += ` : ${message.message}`;
              output += "
  ";
  
          });
  
      });
  
      if (total === 0) {
          output += "no problems";
      } else {
          output += `
  ${total} problem${total !== 1 ? "s" : ""}`;
      }
  
      return output;
  };