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 = new Date(date)
  return new Intl.DateTimeFormat('pt-BR', {
    day: '2-digit',
    month: '2-digit',
    year: 'numeric',
  }).format(d)
}

export function formatDateTime(date: Date | string): string {
  const d = new Date(date)
  return new Intl.DateTimeFormat('pt-BR', {
    day: '2-digit',
    month: '2-digit',
    year: 'numeric',
    hour: '2-digit',
    minute: '2-digit',
  }).format(d)
}

export function formatRelativeTime(date: Date | string): string {
  const d = new 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 (days > 7) {
    return formatDate(d)
  } else if (days > 0) {
    return `${days}d atrás`
  } else if (hours > 0) {
    return `${hours}h atrás`
  } else if (minutes > 0) {
    return `${minutes}min atrás`
  } else {
    return 'agora'
  }
}

export function truncate(str: string, length: number): string {
  if (str.length <= length) return str
  return str.slice(0, length) + '...'
}