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

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

export function formatUptime(seconds: number): string {
  const h = Math.floor(seconds / 3600)
  const m = Math.floor((seconds % 3600) / 60)
  if (h === 0) return `${m}m`
  return `${h}h ${m}m`
}

export function formatMins(mins: number | null): string {
  if (mins === null) return '—'
  if (mins < 1) return '<1m'
  const d = Math.floor(mins / 1440)
  const h = Math.floor((mins % 1440) / 60)
  const m = Math.floor(mins % 60)
  const parts: string[] = []
  if (d) parts.push(`${d}d`)
  if (h) parts.push(`${h}h`)
  parts.push(`${m}m`)
  return parts.join(' ')
}

export function formatPrice(price: number | null, currency: string, priceUsd: number | null): string {
  if (price === null) return '—'
  const sym: Record<string, string> = {
    USD: '$', GBP: '£', EUR: '€', JPY: '¥', CAD: 'CA$', AUD: 'A$',
  }
  const s = sym[currency] ?? currency + ' '
  return `${s}${price % 1 === 0 ? price.toLocaleString() : price.toFixed(2)}`
}

export function timeAgo(isoString: string | null): string {
  if (!isoString) return 'never'
  const diff = Math.floor((Date.now() - new Date(isoString).getTime()) / 1000)
  if (diff < 10) return 'just now'
  if (diff < 60) return `${diff}s ago`
  if (diff < 3600) return `${Math.floor(diff / 60)}m ago`
  if (diff < 86400) return `${Math.floor(diff / 3600)}h ago`
  return `${Math.floor(diff / 86400)}d ago`
}