/*************************************************
* Label By Performance - Lower Bids
* @version: 1.0.1 (non-functional)
* @author: KlientBoost
***************************************************/

var LABEL_NAME = 'REDUCE BIDS';
var CPA_ABOVE = 300;
var COST_ABOVE = 500;
var LAST_N_DAYS = 30;

function main() {

  var DATE_FROM = getAdWordsFormattedDate(LAST_N_DAYS, 'yyyyMMdd');
  var DATE_TO = getAdWordsFormattedDate(1, 'yyyyMMdd');

  resetLabel(LABEL_NAME);

  var iter = AdWordsApp.keywords()
  .withCondition('Cost > ' + COST_ABOVE)
  .withCondition('CostPerConversion > ' + CPA_ABOVE)
  .forDateRange(DATE_FROM, DATE_TO)
  .get();
  
  while(iter.hasNext()) {
    var kw = iter.next();
    var stats = kw.getStatsFor(DATE_FROM, DATE_TO);
    var cost = stats.getCost();
    var conv = stats.getConversions();
    var cpa = cost / conv;
    if(cpa <= CPA_ABOVE) { continue; }
    
    kw.applyLabel(LABEL_NAME);
  }
}

function resetLabel(name) {
  if(AdWordsApp.labels().withCondition('Name = "'+name+'"').get().hasNext()) {
    AdWordsApp.labels().withCondition('Name = "'+name+'"').get().next().remove();
  }
  
  AdWordsApp.createLabel(name);
}

function getAdWordsFormattedDate(d, format){
  var date = new Date();
  date.setDate(date.getDate() - d);
  return Utilities.formatDate(date,AdWordsApp.currentAccount().getTimeZone(),format);
}