function inputCaloriesByDay(day) {
  day = day.toLowerCase();
  if (day === 'monday') {
    return 2000;
  }
  if (day === 'tuesday') {
    return 1000;
  }
  if (day === 'wednesday') {
    return 1900;
  }
  if (day === 'thursday') {
    return 2600;
  }
  if (day === 'friday') {
    return 1000;
  }
  if (day === 'saturday') {
    return 1800;
  }
  if (day === 'sunday') {
    return 1000;
  }
  return 'invalid day, please try again';
}

function getTotalCalories() {
  var caloriesMonday = inputCaloriesByDay('monday');
  var caloriesTuesday = inputCaloriesByDay('tuesday');
  var caloriesWednesday = inputCaloriesByDay('wednesday');
  var caloriesThursday = inputCaloriesByDay('thursday');
  var caloriesFriday = inputCaloriesByDay('friday');
  var caloriesSaturday = inputCaloriesByDay('saturday');
  var caloriesSunday = inputCaloriesByDay('sunday');

  var weekCalories = caloriesMonday + caloriesTuesday + caloriesWednesday +
  caloriesThursday + caloriesFriday + caloriesSaturday + caloriesSunday;

  return weekCalories;
}

function getIdealCalories() {
  var idealDailyCalories = 2000;
  var idealWeeklyCalories = idealDailyCalories * 7;

  return idealWeeklyCalories;
}

function calculateHealthPlan() {
  var actualCalories = getTotalCalories();
  var idealCalories = getIdealCalories();
  if(actualCalories === idealCalories) {
    return "You ate just the right amount!";
  } else if(actualCalories > idealCalories) {
    return "Go to the gym you fatty!";
  } else if(actualCalories < idealCalories) {
    return "Eat more cake!";
  }
}

calculateHealthPlan();