export function cleanText(value) {
  return String(value ?? "").trim();
}

export function isTruthy(value) {
  return value === true || value === "true" || value === "1" || value === 1 || value === "on" || value === "yes";
}

export function escapeHtml(value) {
  return String(value ?? "")
    .replace(/&/g, "&")
    .replace(/</g, "&lt;")
    .replace(/>/g, "&gt;")
    .replace(/"/g, "&quot;")
    .replace(/'/g, "&#39;");
}

export function escapeAttr(value) {
  return escapeHtml(value).replace(/`/g, "&#96;");
}

export function formatDateTime(value) {
  if (!value) return "";
  const date = new Date(value);
  if (Number.isNaN(date.getTime())) return escapeHtml(value);
  const yyyy = date.getFullYear();
  const mm = String(date.getMonth() + 1).padStart(2, "0");
  const dd = String(date.getDate()).padStart(2, "0");
  const hh = String(date.getHours()).padStart(2, "0");
  const mi = String(date.getMinutes()).padStart(2, "0");
  return `${yyyy}-${mm}-${dd} ${hh}:${mi}`;
}

export function stripMarkdown(text) {
  return String(text ?? "")
    .replace(/```[\s\S]*?```/g, " ")
    .replace(/\$\$[\s\S]*?\$\$/g, " ")
    .replace(/\$[^$\n]+\$/g, " ")
    .replace(/!\[([^\]]*)\]\([^)]*\)/g, "$1")
    .replace(/\[([^\]]+)\]\([^)]*\)/g, "$1")
    .replace(/^\s{0,3}#{1,6}\s+/gm, "")
    .replace(/^\s{0,3}>\s?/gm, "")
    .replace(/^\s{0,3}[-*+]\s+/gm, "")
    .replace(/^\s{0,3}\d+[.)]\s+/gm, "")
    .replace(/[*_`~#]/g, " ")
    .replace(/\s+/g, " ")
    .trim();
}

export function b64EncodeUtf8(str) {
  return btoa(unescape(encodeURIComponent(str)));
}