// #region game core
// ...
const getStateAfterFoodProcessing = (state) => {
  const headSegment = new Segment(
    getLastElement(getWithoutLastElement(state.snake)),
    getLastElement(state.snake)
  )
  if (!headSegment.isPointInside(state.food)) return state

  const [tailEnd, beforeTailEnd, ...restOfSnake] = state.snake
  const tailSegment = new Segment(beforeTailEnd, tailEnd)
  const newTailEnd = tailEnd.add(tailSegment.getVector().normalize())
  const snake = [newTailEnd, beforeTailEnd, ...restOfSnake]
  const food = getFood(state.width, state.height, snake)
  return {
    ...state,
    snake,
    score: state.score + 1,
    food
  }
}