[@tailrec] Split time interval in smaller interval (Scala and Joda Time)

SplitTimeInterval.scala

  import org.joda.time.format.DateTimeFormat
  import org.joda.time._
  import scala.annotation.tailrec

  val timeWindow: Seconds = Seconds.seconds(Hours.hours(12).toStandardSeconds.getSeconds)
  type Delta = (DateTime, DateTime)
  
  def splitInterval(from: DateTime, to: DateTime, interval: Seconds): Seq[Delta] = {
    @tailrec
    def loop(_from: DateTime, intervalList: Seq[Delta]): Seq[Delta] = {
      _from match {
        case f if f.isAfter(to) => intervalList
        case f => {
          val fplus1 = f.plus(timeWindow)
          loop(fplus1, intervalList ++ Seq((f, fplus1)))
        }
      }
    }
    // We don't want the last split (I hate this glitch)
    loop(from, Seq()).dropRight(1)
  }
  // Note: probably there's a way to do this in one line in JodaTime :D