import { dancerSubstitution } from "./define-figure.js"
import { throw_up } from "./util.js"

var invertPairHash = {
  ladles: "gentlespoons",
  gentlespoons: "ladles",
  ones: "twos",
  twos: "ones",
  "first corners": "second corners",
  "second corners": "first corners",
  "*": "*",
}
// If this names 2 dancers, this returns the names for the other 2 dancers
// it's sketchy, because it assumes 4 dancers, so only use it in contra moves.
// Formerly known as dancers complement.
export function invertPair(whostr, dialect) {
  if (!whostr) {
    return "others"
  } // undefined is ok
  var dancers = invertPairHash[whostr]
  if (dancers) {
    return dancerSubstitution(dancers, dialect)
  } else {
    throw_up("bogus parameter to invertPairHash: " + whostr)
  }
}

export function labelForBeats(beats) {
  if (beats % 16 == 0)
    switch (beats / 16) {
      case 0:
        return "A1"
      case 1:
        return "A2"
      case 2:
        return "B1"
      case 3:
        return "B2"
      case 4:
        return "C1"
      case 5:
        return "C2"
      case 6:
        return "D1"
      case 7:
        return "D2"
    }
  return ""
}