define(function(require, exports, module) {
'use strict';

var Calc = require('common/calc');

/**
 * This is a more crude version of what asuth does in email.
 * Right now this class is here only for debugging sync issues.
 * We need to add the settings so we can optionally turn this on.
 */
function EventLogger() {
  this.events = Object.create(null);
  this.occurs = Object.create(null);

  this.richLog = {};
}
module.exports = EventLogger;

EventLogger.prototype = {
  displayLog: function(id, string) {
    if (!(id in this.richLog)) {
      this.richLog[id] = [];
    }
    this.richLog[id].push(string);
  },

  addEvent: function(event) {
    var id = event.id;
    this.events[id] = event;
    var log = this.formatEvent(event);
    this.displayLog(id, log);
  },

  addBusytime: function(busy) {
    var id = busy.eventId;
    this.occurs[id] = busy;
    this.displayLog(id, this.formatBusytime(busy));
  },

  formatEvent: function(event) {
    var format = [
      'add event: (' + event.id + ')',
      'title:' + event.title,
      'start:' + (Calc.dateFromTransport(event.start)).toString(),
      'end:' + (Calc.dateFromTransport(event.end)).toString(),
      'isException:' + event.isException
    ];

    return format.join(' || ');
  },

  formatBusytime: function(busy) {
    var event = this.events[busy.eventId];
    var title = 'busytime for event: ' + busy.eventId;

    if (event) {
      title = 'busytime for event: ' + event.title;
    }

    var format = [
      title,
      'start:' + (Calc.dateFromTransport(busy.start)).toString(),
      'end:' + (Calc.dateFromTransport(busy.end)).toString(),
      'isException:' + busy.isException
    ];

    return format.join(' || ');
  }
};

});