export def lumen-assono-worktime-calc [datestr = string]: nothing -> string {
  let $datestr = $datestr | str replace ' +' ' '
  mut $dateArray = []
  let $rawDateArray = $datestr | split row ' '
  if (($rawDateArray | length) mod 2 == 1) {
    mut $spliceCounter = true
    for $i in $rawDateArray {
      if ($spliceCounter) {
        $dateArray = $dateArray | append $i
      }
      $spliceCounter = not $spliceCounter
    }
  } else {
    $dateArray = $rawDateArray
  }

  if (($dateArray | length) mod 2 == 1) {
    error make {msg: 'Uneven Times given!'}
  }

  mut $dateArrayOutput = []
  mut $dateArrayOutputBuilderCounter = true
  for $i in $dateArray {
    $dateArrayOutput = $dateArrayOutput | append ($i | date from-human | format date '%H:%M')
    if ($dateArrayOutputBuilderCounter) {
      $dateArrayOutput = $dateArrayOutput | append '-'
    } else {
      $dateArrayOutput = $dateArrayOutput | append '|'
    }
    $dateArrayOutputBuilderCounter = not $dateArrayOutputBuilderCounter
  }
  let $dateArrayOutput = ($dateArrayOutput | drop 1) | str join ' '

  # $dateArray[0]
  mut $hours = 0min
  while (($dateArray | length) > 0) {
    $hours += ($dateArray | get 1 | into datetime) - ($dateArray | get 0 | into datetime)
    $dateArray = $dateArray | skip 2
  }
  $"($dateArrayOutput)\n($hours | into string)"
}