"use client";

// Format time ago from ISO UTC string like "2025-05-23T09:24:25.000000Z"
function formatTimeAgo(utcString: string): string {
  const utcDate = new Date(utcString); // No need to add "Z"
  const localDate = new Date();

  const diffInSeconds = Math.floor((localDate.getTime() - utcDate.getTime()) / 1000);
  const diffInMinutes = Math.floor(diffInSeconds / 60);
  const diffInHours = Math.floor(diffInMinutes / 60);
  const diffInDays = Math.floor(diffInHours / 24);
  const diffInMonths = Math.floor(diffInDays / 30); // Approximate
  const diffInYears = Math.floor(diffInDays / 365); // Approximate

  if (diffInYears > 0) {
    return `${diffInYears}y`;
  } else if (diffInMonths > 0) {
    return `${diffInMonths}mo`;
  } else if (diffInDays > 0) {
    return `${diffInDays}d`;
  } else if (diffInHours > 0) {
    return `${diffInHours}h`;
  } else if (diffInMinutes > 0) {
    return `${diffInMinutes}m`;
  } else {
    return `${diffInSeconds}s`;
  }
}

export default formatTimeAgo;