Days since you were born

export const take = [
  { type: "date", label: "Date of birth", value: "1988-01-23" },
]

export const make = (eventDate) => {
  if (!eventDate) return

  const todayDate = new Date()

  const dayMs = 1000 * 60 * 60 * 24
  const delta = Math.abs(Math.round((eventDate - todayDate) / dayMs))

  const days = new Intl.NumberFormat().format(delta)

  const date = new Intl.DateTimeFormat(undefined, {
    year: "numeric",
    day: "numeric",
    month: "long",
    weekday: "long",
    era: eventDate.getFullYear() < 1200 ? "short" : undefined,
  }).format(eventDate)

  const isOrAre = delta === 1 ? "is" : "are"
  const dayOrDays = delta === 1 ? "day" : "days"

  let value, detail

  if (delta === 0) {
    value = `It’s here!`
    detail = `It’s ${date} today!`
  } else if (eventDate - todayDate > 0) {
    value = `${days} ${dayOrDays} left`
    detail = `There ${isOrAre} ${days} ${dayOrDays} to go until ${date}!`
  } else {
    value = `${days} ${dayOrDays} ago`
    detail = `It’s been ${days} ${dayOrDays} since ${date}!`
  }

  return {
    type: "card",
    value,
    detail,
  }
}