// js/utils/time-utils.js

// Helper function to convert time string to minutes since midnight
function timeToMinutes(timeStr) {
  const match = timeStr.match(/([0-9]+)(?::([0-9]+))?(am|pm)/i);
  if (!match) return 0;
  
  let hours = parseInt(match[1]);
  const minutes = parseInt(match[2] || '0');
  const meridian = match[3].toLowerCase();
  
  if (meridian === 'pm' && hours !== 12) {
    hours += 12;
  } else if (meridian === 'am' && hours === 12) {
    hours = 0;
  }
  
  return hours * 60 + minutes;
}

// Helper function to ensure consistent time format
function formatTimeSlot(hour) {
  const meridian = hour >= 12 ? 'pm' : 'am';
  const displayHour = hour > 12 ? hour - 12 : (hour === 0 ? 12 : hour);
  return `${displayHour}:00${meridian}`;
}

// Format date as YYYY-MM-DD
function formatDate(date) {
  const year = date.getFullYear();
  const month = String(date.getMonth() + 1).padStart(2, '0');
  const day = String(date.getDate()).padStart(2, '0');
  return `${year}-${month}-${day}`;
}

// Parse date string to Date object
function parseDate(dateStr) {
  const [year, month, day] = dateStr.split('-').map(Number);
  return new Date(year, month - 1, day);
}

// Export functions for use in other files
export {
  timeToMinutes,
  formatTimeSlot,
  formatDate,
  parseDate
};