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

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

export function formatCurrency(amount: number | string | null | undefined, currency = 'USD'): string {
  if (amount === null || amount === undefined) return '$0.00'
  const num = typeof amount === 'string' ? parseFloat(amount) : amount
  return new Intl.NumberFormat('en-US', {
    style: 'currency',
    currency,
    minimumFractionDigits: 2,
  }).format(num)
}

export function formatDate(date: Date | string | null | undefined): string {
  if (!date) return '-'
  const d = typeof date === 'string' ? new Date(date) : date
  return new Intl.DateTimeFormat('en-US', {
    day: '2-digit',
    month: 'short',
    year: 'numeric',
  }).format(d)
}

export function formatDateTime(date: Date | string | null | undefined): string {
  if (!date) return '-'
  const d = typeof date === 'string' ? new Date(date) : date
  return new Intl.DateTimeFormat('en-US', {
    day: '2-digit',
    month: 'short',
    year: 'numeric',
    hour: '2-digit',
    minute: '2-digit',
  }).format(d)
}

export function getInitials(name: string): string {
  return name
    .split(' ')
    .map((n) => n[0])
    .join('')
    .toUpperCase()
    .slice(0, 2)
}

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