'use client';import { Volume2, VolumeX } from 'lucide-react';import { AnimatePresence, LazyMotion, MotionConfig, domMax, m } from 'motion/react';import { useEffect, useId, useMemo, useState, type ComponentProps } from 'react';import { cn } from '@/lib/utils';import { CityList } from './city-list';import { DEFAULT_CITIES, DEFAULT_HOME_ID, type ClockCity } from './data';import { Dial } from './dial';import { SWAP } from './motion';import { Odometer } from './odometer';import { buildViews, describeOffset, formatTime, formatDelta } from './time';export type { ClockCity } from './data';export type WorldClockProps = Omit<ComponentProps<'section'>, 'children'> & { cities?: ClockCity[]; /** Id of the home city; every offset is measured from it. */ homeId?: string; /** Id of the city shown on open. Defaults to the home city. */ defaultSelectedId?: string; /** Freeze the clock on this instant (stories, screenshots). Omit for the live time. */ now?: Date; onSelectedChange?: (id: string) => void; /** `auto` follows the page's `.dark` class. */ theme?: 'auto' | 'light' | 'dark'; /** Click sound while the sun moves; the speaker button toggles it. Default on. */ sound?: boolean;};/* Light and dark tokens, scoped to the clock. `theme="auto"` follows a `.dark` ancestor (what next-themes and shadcn set), so it matches the rest of the page; force one with `theme`.*/const THEME_CSS = `.wc{--wc-bg:#f3f3f0;--wc-face:#fff;--wc-card:#fff;--wc-line:rgb(0 0 0/.11);--wc-tint:rgb(0 0 0/.04);--wc-text:#17171a;--wc-muted:#6c6c72;--wc-day:#1c9a55;--wc-hand:#17171a;--wc-focus:#2563eb}.wc[data-wc-theme=dark],:is(.dark,[data-theme=dark]) .wc[data-wc-theme=auto]{--wc-bg:#0e0e10;--wc-face:#161618;--wc-card:#212124;--wc-line:rgb(255 255 255/.1);--wc-tint:rgb(255 255 255/.04);--wc-text:#f4f4f2;--wc-muted:#8e8e93;--wc-day:#6fd392;--wc-hand:#fff;--wc-focus:#9bc4ff}@keyframes wc-pulse{0%{transform:scale(1);opacity:.55}70%,100%{transform:scale(1.55);opacity:0}}`;/** Current time, re-read on every minute boundary so the hand and digits tick together. */function useNow(frozen?: Date) { const [now, setNow] = useState<Date | null>(frozen ?? null); useEffect(() => { if (frozen) { setNow(frozen); return; } let timer: ReturnType<typeof setTimeout>; const tick = () => { const current = new Date(); setNow(current); timer = setTimeout(tick, 60_000 - (current.getTime() % 60_000) + 50); }; tick(); // Timers are throttled in background tabs and stop in sleep: resync as soon as we are back. const resync = () => { if (document.visibilityState === 'visible') { clearTimeout(timer); tick(); } }; document.addEventListener('visibilitychange', resync); window.addEventListener('focus', resync); return () => { clearTimeout(timer); document.removeEventListener('visibilitychange', resync); window.removeEventListener('focus', resync); }; }, [frozen]); return now;}export function WorldClock({ cities = DEFAULT_CITIES, homeId = DEFAULT_HOME_ID, defaultSelectedId, now: frozenNow, onSelectedChange, theme = 'auto', sound: soundProp = true, className, ...props}: WorldClockProps) { const pillId = useId(); const [sound, setSound] = useState(soundProp); /** How far the user has dragged the clock away from the real time, in minutes. */ const [shift, setShift] = useState(0); const liveNow = useNow(frozenNow); const now = useMemo( () => (liveNow ? new Date(liveNow.getTime() + shift * 60_000) : null), [liveNow, shift], ); const [selectedId, setSelectedId] = useState(defaultSelectedId ?? homeId); const views = useMemo(() => (now ? buildViews(cities, homeId, now) : []), [cities, homeId, now]); const selected = views.find((view) => view.id === selectedId) ?? views[0]; const select = (id: string) => { setSelectedId(id); onSelectedChange?.(id); }; return ( <LazyMotion features={domMax} strict> <MotionConfig reducedMotion="user"> <style>{THEME_CSS}</style> <section aria-label="World clock" className={cn( 'wc @container w-full rounded-3xl bg-[color:var(--wc-bg)] p-5 text-[color:var(--wc-text)] @2xl:p-8', className, )} data-wc-theme={theme} {...props} > {selected ? ( <div className="grid items-center gap-8 @2xl:grid-cols-[minmax(0,26rem)_minmax(0,1fr)] @2xl:gap-12"> <div className="mx-auto w-full max-w-[26rem]"> <Dial onScrub={(delta) => setShift((value) => value + delta)} onSelect={select} sound={sound} selected={selected} views={views} > <div className="grid"> <AnimatePresence initial={false}> <m.div key={selected.id} animate={{ opacity: 1, transform: 'translateY(0px)' }} className="col-start-1 row-start-1" exit={{ opacity: 0, transform: 'translateY(-4px)' }} initial={{ opacity: 0, transform: 'translateY(4px)' }} transition={SWAP} > <div className="truncate text-[0.8125rem] text-[color:var(--wc-text)]/90 @md:text-sm"> {selected.name} </div> </m.div> </AnimatePresence> <div className="col-start-1 row-start-2 my-1 flex justify-center text-[clamp(0.7rem,3.4cqw,1.125rem)]"> <Odometer hour={selected.hour} label={`${selected.name}, ${formatTime(selected)}`} minute={selected.minute} /> </div> <AnimatePresence initial={false}> <m.div key={selected.id} animate={{ opacity: 1 }} className="col-start-1 row-start-3 text-xs text-[color:var(--wc-muted)] tabular-nums" exit={{ opacity: 0 }} initial={{ opacity: 0 }} transition={SWAP} > {selected.isHome ? 'Home' : formatDelta(selected.deltaHours)} </m.div> </AnimatePresence> </div> </Dial> <div className="relative flex h-8 items-center justify-center"> <button aria-label={sound ? 'Mute click sound' : 'Unmute click sound'} aria-pressed={!sound} className="absolute right-0 grid size-8 place-items-center rounded-full text-[color:var(--wc-muted)] transition-colors duration-150 outline-none focus-visible:ring-2 focus-visible:ring-[color:var(--wc-focus)] can-hover:hover:text-[color:var(--wc-text)]" onClick={() => setSound((value) => !value)} type="button" > {sound ? <Volume2 className="size-4" /> : <VolumeX className="size-4" />} </button> <AnimatePresence initial={false}> {shift !== 0 && ( <m.button key="reset" animate={{ opacity: 1, transform: 'translateY(0px)' }} className="rounded-full border border-[color:var(--wc-line)] bg-[color:var(--wc-tint)] px-3 py-1 text-xs text-[color:var(--wc-muted)] transition-colors duration-150 outline-none focus-visible:ring-2 focus-visible:ring-[color:var(--wc-focus)] can-hover:hover:text-[color:var(--wc-text)]" exit={{ opacity: 0, transform: 'translateY(4px)' }} initial={{ opacity: 0, transform: 'translateY(4px)' }} onClick={() => setShift(0)} transition={SWAP} type="button" > Back to now </m.button> )} </AnimatePresence> </div> </div> <CityList onSelect={select} pillId={pillId} selectedId={selected.id} views={views} /> <p aria-live="polite" className="sr-only"> {selected.name}, {formatTime(selected)},{' '} {selected.isHome ? 'home' : describeOffset(selected)} </p> </div> ) : ( <div aria-busy className="aspect-[2/1] w-full" /> )} </section> </MotionConfig> </LazyMotion> );}