var conditionalSum = function(values, condition) {
  if (!values || values.length === 0) {
    // Invalid inputs
    // console.log("Values input is null or length = 0");
    return 0;
  }

  condition = condition.toLowerCase();
  let isEven = false;
  if (condition === "even") {
    isEven = true;
  } else if (condition === "odd") {
    isEven = false;
  } else {
    // Invalid inputs
    // console.log("Valid values for condition are even or odd, found " + condition);
    return 0;
  }

  let sum = 0;
  for (let val of values) {
    let numVal = Number(val);
    // Even Value
    if (numVal % 2 === 0) {
      if (isEven) {
        sum += numVal;
      }
    } else {
      // Odd Value
      if (!isEven) {
        sum += numVal;
      }
    }
  }
  return sum;
};

var runTask2 = function() {
  console.log(conditionalSum([1, 2, 3, 4, 5], "even"));
  console.log(conditionalSum([1, 2, 3, 4, 5], "odd"));
  console.log(conditionalSum([13, 88, 12, 44, 99], "even"));
  console.log(conditionalSum([], "odd"));
  /*
    6
    9
    144
    0
    */
};

runTask2();