// Rôle : regroupe les constantes et helpers DOM du bloc-notes riche.
export const TEXT_COLORS = ["#f5f7ff", "#b4bdd3", "#f6c453", "#22d3ee", "#8b5cf6", "#d946ef"];
export const HIGHLIGHT_COLORS = ["#f6c453", "#22d3ee", "#8b5cf6", "#d946ef", "#202745"];
export const DRAWING_WIDTHS = [2, 4, 8, 12];

export function getPlainText(element) {
  return (element?.innerText || "").replace(/\n{3,}/g, "\n\n").trim();
}

export function getSelectionTextOffset(container) {
  const selection = document.getSelection();
  if (!container || !selection?.rangeCount || !container.contains(selection.anchorNode)) return null;
  const range = selection.getRangeAt(0);
  const prefix = range.cloneRange();
  prefix.selectNodeContents(container);
  prefix.setEnd(range.startContainer, range.startOffset);
  return prefix.toString().length;
}

export function restoreSelectionTextOffset(container, offset) {
  if (!container || offset == null) return;
  const walker = document.createTreeWalker(container, NodeFilter.SHOW_TEXT);
  let remaining = offset;
  let node = walker.nextNode();
  while (node) {
    const length = node.textContent.length;
    if (remaining <= length) {
      const range = document.createRange();
      range.setStart(node, remaining);
      range.collapse(true);
      const selection = document.getSelection();
      selection.removeAllRanges();
      selection.addRange(range);
      return;
    }
    remaining -= length;
    node = walker.nextNode();
  }
  const range = document.createRange();
  range.selectNodeContents(container);
  range.collapse(false);
  const selection = document.getSelection();
  selection.removeAllRanges();
  selection.addRange(range);
}

export function isHtmlEmpty(html, text) {
  return !text && !String(html || "").replace(/<br\s*\/?>/gi, "").replace(/<[^>]*>/g, "").replace(/&nbsp;/gi, " ").trim();
}

export function formatUpdatedAt(value) {
  if (!value) return "";
  const date = new Date(value);
  if (Number.isNaN(date.getTime())) return "";
  return new Intl.DateTimeFormat("fr-FR", {
    dateStyle: "short",
    timeStyle: "short"
  }).format(date);
}

export function queryCommandState(command) {
  try {
    return document.queryCommandState(command);
  } catch {
    return false;
  }
}

export function queryBlockFormat() {
  try {
    return String(document.queryCommandValue("formatBlock") || "").replace(/[<>]/g, "").toLowerCase();
  } catch {
    return "";
  }
}