const overtime = (hours, priorHours, terminal) => {
  switch (terminal) {
    case 'LAX':
    case 'SFO':
      return californiaRules(hours)
      break
    case 'LAS':
    case 'PHX':
      return federalRules(hours, priorHours)
      break
    default:
      throw new Error(`Overtime rules not implemented for ${terminal}.`)
  }
}

const californiaRules = (hours) => {
  const regularHours = Math.min(hours, 8)
  const overtimeHours = Math.min(Math.max(hours - 8, 0), 4)
  const doubletimeHours = Math.max(hours - 12, 0)
  return {regularHours, overtimeHours, doubletimeHours}
}

const federalRules = (hours, priorHours) => {
  const regularHours = Math.max(Math.min(40 - priorHours, hours), 0)
  const overtimeHours = hours - regularHours
  return {regularHours, overtimeHours, doubletimeHours: 0}
}

module.exports = overtime