Cancellation Deadline Note

"use client"

import * as React from "react"

import { DateField } from "@/components/ui/date-field"
import {
  addMinutesToDateTime,
  diffMinutes,
  formatDateTime,
  nowLocal,
  toDateTime,
} from "@/components/ui/date-time-core"

export interface CancellationDeadlineNoteProps {
  value?: string | null
  defaultValue?: string | null
  onValueChange?: (checkIn: string | null) => void
  hoursBefore?: number
  checkInTime?: string
  now?: string
  locale?: string
}

export function cancellationDeadline(
  checkIn: string,
  time: string,
  hoursBefore: number
) {
  return addMinutesToDateTime(toDateTime(checkIn, time), -hoursBefore * 60)
}

export function CancellationDeadlineNote({
  value,
  defaultValue = null,
  onValueChange,
  hoursBefore = 48,
  checkInTime = "15:00",
  now: nowProp,
  locale,
}: CancellationDeadlineNoteProps) {
  const now = nowProp ?? nowLocal()
  const [inner, setInner] = React.useState<string | null>(defaultValue)
  const checkIn = value === undefined ? inner : value

  let note = "Choose a check-in date to see the cancellation deadline."
  let state: "open" | "soon" | "closed" | null = null
  if (checkIn) {
    const deadline = cancellationDeadline(checkIn, checkInTime, hoursBefore)
    const left = diffMinutes(now, deadline)
    if (left <= 0) {
      state = "closed"
      note = "Non-refundable: the free cancellation period has ended."
    } else {
      state = left < 24 * 60 ? "soon" : "open"
      note = `Free cancellation until ${formatDateTime(deadline, locale)}${state === "soon" ? " (less than 24 hours left)" : ""}.`
    }
  }

  return (
    <div className="flex flex-col gap-2">
      <DateField
        label="Check-in date"
        locale={locale}
        value={checkIn}
        onValueChange={(next) => {
          if (value === undefined) setInner(next)
          onValueChange?.(next)
        }}
      />
      <p
        role="status"
        data-state={state ?? undefined}
        className="data-[state=closed]:text-destructive text-sm data-[state=soon]:font-medium"
      >
        {note}
      </p>
    </div>
  )
}