import { $isAtNodeEnd } from "@lexical/selection"
import { ElementNode, RangeSelection, TextNode } from "lexical"

export function getSelectedNode(
  selection: RangeSelection
): TextNode | ElementNode {
  const anchor = selection.anchor
  const focus = selection.focus
  const anchorNode = selection.anchor.getNode()
  const focusNode = selection.focus.getNode()
  if (anchorNode === focusNode) {
    return anchorNode
  }
  const isBackward = selection.isBackward()
  if (isBackward) {
    return $isAtNodeEnd(focus) ? anchorNode : focusNode
  } else {
    return $isAtNodeEnd(anchor) ? anchorNode : focusNode
  }
}