iotDashboard/frontend/src/lib/utils.ts

import { type ClassValue, clsx } from "clsx"
import { twMerge } from "tailwind-merge"

export function cn(...inputs: ClassValue[]) {
  return twMerge(clsx(inputs))
}

export function formatDate(date: Date | string): string {
  const d = typeof date === 'string' ? new Date(date) : date
  return d.toLocaleDateString() + ' ' + d.toLocaleTimeString()
}

export function formatRelativeTime(date: Date | string): string {
  const d = typeof date === 'string' ? new Date(date) : date
  const now = new Date()
  const diff = now.getTime() - d.getTime()
  
  const seconds = Math.floor(diff / 1000)
  const minutes = Math.floor(seconds / 60)
  const hours = Math.floor(minutes / 60)
  const days = Math.floor(hours / 24)
  
  if (seconds < 60) return `${seconds}s ago`
  if (minutes < 60) return `${minutes}m ago`
  if (hours < 24) return `${hours}h ago`
  if (days < 30) return `${days}d ago`
  
  return formatDate(d)
}