export function applyFormat(editor, format) {
  const wrap = (before, after = before, placeholder = "tekst") => {
    const start = editor.selectionStart, end = editor.selectionEnd;
    const selected = editor.value.slice(start, end) || placeholder;
    editor.setRangeText(before + selected + after, start, end, "select");
  };
  const prefix = (value) => {
    const start = editor.selectionStart, end = editor.selectionEnd;
    const lineStart = editor.value.lastIndexOf("\n", start - 1) + 1;
    const selected = editor.value.slice(lineStart, end);
    editor.setRangeText(selected.split("\n").map((line, index) => typeof value === "function" ? value(index) + line : value + line).join("\n"), lineStart, end, "select");
  };
  if (format === "bold") wrap("**");
  if (format === "italic") wrap("*");
  if (format === "strike") wrap("~~");
  if (format === "heading") prefix("## ");
  if (format === "bullet") prefix("- ");
  if (format === "number") prefix((index) => `${index + 1}. `);
  if (format === "quote") prefix("> ");
  if (format === "link") wrap("[", "](https://)", "opis linku");
  editor.focus();
  editor.dispatchEvent(new Event("input", { bubbles: true }));
}