protocol Context {
  var itemsCount: Float { get }
}

protocol Position {
  var x: Float { get }
  var y: Float { get }
}

func memoryGap() -> Float {
  return memorySide() + memorySpace()
}

func memoryGroups(c: Context) -> Record<Float, Float> {
  var items: Record<Float, Float> = {};
  // @ts-ignore
  let ids = utsIndexArray(c.itemsCount);
  ids.forEach { i in
    // @ts-ignore
    items[i] = utsFloor(Float(i) / 2)
  }
  return items;
}

func memorySide() -> Float {
  return 50
}

func memorySpace() -> Float {
  return 20
}

func memoryItemPositions(c: Context) -> [Position] {
  var pos: [Position] = []

  // @ts-ignore
  let ids = utsIndexArray(c.itemsCount);
  ids.forEach { i in
    // @ts-ignore
    let row = utsFloor(Float(i) / 4)
    let x = memoryGap() + (Float(i) - row * 4) * memoryGap()
    let y = memoryGap() + row * memoryGap()
    // @ts-ignore
    pos.append(memoryCreatePosition(x, y))
  }
  return pos
}