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

/** Fixed locale so SSR and browser output match (avoids hydration mismatch). */
const countFormatter = new Intl.NumberFormat('en-US')

export function formatCount(value: number): string {
  return countFormatter.format(value)
}

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

/**
 * Next occurrence of `hour`:`minute` (0–23, 0–59) in the local timezone.
 * If that time today is still in the future, returns today; otherwise tomorrow.
 */
export function getNextLocalWallClockDate(hour: number, minute = 0): Date {
  const d = new Date()
  d.setHours(hour, minute, 0, 0)
  if (d.getTime() <= Date.now()) {
    d.setDate(d.getDate() + 1)
  }
  return d
}