var config = {
  payout: {value: 3.5, type: 'multiplier'},
  stop: {value: 20000000, type: 'balance', label: 'stop if bet >'},
};

let logsVar = {
  playedGamesStats: {
    games: 0,
    netProfit: 0,
    lastTimeStop: 0,
    maxLosingStreak: 0
  },
  userStats: {
    balance: userInfo.balance,
    profit: userInfo.profit
  },
  fibonacci: {
    lastVal: 0
  }
};

log('Script is running..');
log(`at start: userBalance: ${logsVar.userStats.balance / 100} | userProfit: ${logsVar.userStats.profit / 100}`);

let currentBet = 100;
let losingStreak = 0;

// Always try to bet when script is started + start listeners
engine.bet(roundBit(currentBet), config.payout.value);
engine.on('GAME_STARTING', onGameStarted);
engine.on('GAME_ENDED', onGameEnded);

const onWin = () => {
  losingStreak = 0;
  logsVar.playedGamesStats.netProfit += (config.payout.value * currentBet) - currentBet;
  logsVar.fibonacci.lastVal = 0;
  currentBet = 100;
  log('We won, so next bet will be', currentBet / 100, 'bits')
};

const onLose = () => {
  const nextVal = currentBet + logsVar.fibonacci.lastVal;

  losingStreak++;
  if (losingStreak > logsVar.playedGamesStats.maxLosingStreak)
    logsVar.playedGamesStats.maxLosingStreak = losingStreak;
  logsVar.playedGamesStats.netProfit -= currentBet;
  logsVar.fibonacci.lastVal = currentBet;
  currentBet = nextVal;
  log('We lost, so next bet will be', currentBet / 100, 'bits');
};

const onStop = () => {
  log(`Was about to bet ${currentBet / 100}, which triggers the stop, start back with base bet value.`);
  log(`From the last stop, ${logsVar.playedGamesStats.lastTimeStop} games ago, we earned: ${logsVar.playedGamesStats.netProfit / 100} bits.`);
  log(`actual user account informations: userBalance: ${logsVar.userStats.balance / 100} | userProfit: ${logsVar.userStats.profit / 100}`);
  logsVar.playedGamesStats.lastTimeStop = 0;
  logsVar.fibonacci.lastVal = 0;
  currentBet = 100;
};

function onGameStarted() {
  engine.bet(roundBit(currentBet), config.payout.value);
}

function onGameEnded() {
  var lastGame = engine.history.first();

  // If we wagered, it means we played
  if (lastGame.wager) {
    logsVar.playedGamesStats.games++;
    logsVar.playedGamesStats.lastTimeStop++;
    lastGame.cashedAt
      ? onWin()
      : onLose();
  }
  if (currentBet > config.stop.value)
    onStop();
  log(`Actual profit: ${logsVar.playedGamesStats.netProfit / 100} in ${logsVar.playedGamesStats.games} games played.`);
  log(`Highest losing streak with payout at ${config.payout.value} was: ${logsVar.playedGamesStats.maxLosingStreak}`);
}

function roundBit(bet) {
  return Math.round(bet / 100) * 100;
}