# Typed words, tallied. A list keyed by the word keeps each word once, in
# order; tallies[word] finds it by halving, whatever the list's length.
record Tally {
  word: text
  times = 0
}
state tallies: list of Tally by word
state at: index of tallies
input typed = text
input forget = key Delete
input up = key ArrowUp
input down = key ArrowDown

on typed {
  if !tallies.has(typed) {
    tallies.add(Tally { word: typed })
  }
  tallies[typed].times = tallies[typed].times + 1
  at = tallies[typed]
}
on forget.down { tallies.remove(at) }
on up.down { at = at - 1 }
on down.down { at = at + 1 }

view current = if tallies.count > 0 { "{at.word}: {at.times}" } else { "-" }
view words = tallies.count
view typed_total = sum(t.times for t in tallies)
view most = max(t.times for t in tallies)
view table = each t in tallies {
  word = t.word
  times = t.times
}