import { Editor } from "editor/editor";

export const blockNames = [
  "paragraph",
  "h1",
  "h2",
  "h3",
  "h4",
  "h5",
  "h6",
  "unordered_list",
  "ordered_list",
  "blockquote",
];
export const markNames = [
  "bold",
  "italic",
  "deleted",
  "underline",
  "sub",
  "super",
  "mark",
  "link",
  "small",
];
export const parentBlockNames = ["left", "center", "right"];

export function moveChildren(from: Element, to: Element, toRef: Node | null) {
  while (from.firstChild) to.insertBefore(from.firstChild, toRef);
}

export function isDirectChild(node: Node, supposedChild: Node): boolean {
  for (const child of node.childNodes) {
    if (child == supposedChild) return true;
  }
  return false;
}

export function safeGetSelection(editor: Editor): Selection | null {
  const sel = window.getSelection();
  if (!sel) return null;
  // XXX: no damos la selección si esta fuera o _es_ el contentEl, ¿quizás
  // deberíamos mostrar un error?
  if (
    !editor.contentEl.contains(sel.anchorNode) ||
    !editor.contentEl.contains(sel.focusNode) ||
    sel.anchorNode == editor.contentEl ||
    sel.focusNode == editor.contentEl
  )
    return null;
  return sel;
}

export function safeGetRangeAt(selection: Selection, num = 0): Range | null {
  try {
    return selection.getRangeAt(num);
  } catch (error) {
    return null;
  }
}

interface SplitNode {
  range: Range;
  node: Node;
}

export function splitNode(node: Element, range: Range): [SplitNode, SplitNode] {
  const [left, right] = [
    { range: document.createRange(), node: node.cloneNode(false) },
    { range: document.createRange(), node: node.cloneNode(false) },
  ];

  if (node.firstChild) left.range.setStartBefore(node.firstChild);
  left.range.setEnd(range.startContainer, range.startOffset);
  left.range.surroundContents(left.node);

  right.range.setStart(range.endContainer, range.endOffset);
  if (node.lastChild) right.range.setEndAfter(node.lastChild);
  right.range.surroundContents(right.node);

  if (!node.parentElement)
    throw new Error("No pude separar los nodos por que no tiene parentNode");

  moveChildren(node, node.parentElement, node);
  node.parentElement.removeChild(node);

  return [left, right];
}

export function setAuxiliaryToolbar(
  editor: Editor,
  bar: HTMLElement | null
): void {
  for (const { parentEl } of Object.values(editor.toolbar.auxiliary)) {
    delete parentEl.dataset.editorAuxiliaryActive;
  }
  if (bar) bar.dataset.editorAuxiliaryActive = "active";
}
export function clearSelected(editor: Editor): void {
  const selectedEl = editor.contentEl.querySelector("[data-editor-selected]");
  if (selectedEl) delete (selectedEl as HTMLElement).dataset.editorSelected;
}