import { useEffect, useState } from 'react';
import { useAtomValue } from 'jotai';
import { focusAssistActiveAtom } from '../state/focusAssist';
import { manualDndAtom } from '../state/manualDnd';
import { isSnoozeActive, notificationSnoozeUntilAtom } from '../state/notificationSnooze';
import { isWithinTimeWindow } from '../utils/timeWindow';
import { useSetting } from '../state/hooks/settings';
import { settingsAtom } from '../state/settings';

const QUIET_TICK_MS = 30_000;

export type NotificationsQuietInputs = {
  focusAssistActive: boolean;
  manualDnd: boolean;
  snoozeUntil: number;
  quietHoursEnabled: boolean;
  quietHoursStart: string;
  quietHoursEnd: string;
  now?: Date;
};

// Gitea #28 — pure "should we make noise right now?" predicate, extracted from
// the gate that `ClientNonUIFeatures` already applies to message/invite sounds
// (Focus Assist, manual tray DND, the snooze, and the quiet-hours window) so the
// incoming-call ringtone (and anything else) can honour the same rules.
export function isNotificationsQuiet({
  focusAssistActive,
  manualDnd,
  snoozeUntil,
  quietHoursEnabled,
  quietHoursStart,
  quietHoursEnd,
  now,
}: NotificationsQuietInputs): boolean {
  return (
    focusAssistActive ||
    manualDnd ||
    isSnoozeActive(snoozeUntil, now?.getTime()) ||
    (quietHoursEnabled && isWithinTimeWindow(quietHoursStart, quietHoursEnd, now))
  );
}

// Live-atoms/settings-backed version of `isNotificationsQuiet` for use in
// components.
export function useNotificationsQuiet(): boolean {
  // [Gitea #325] The quiet-hours window and the snooze expiry depend on the
  // clock, but the long-lived notifiers using this hook rarely re-render, so a
  // window starting (or a 30-minute pause ending) while the app stayed open was
  // never noticed. Re-evaluate on a tick, like the night-light overlay.
  const [, setTick] = useState(0);
  useEffect(() => {
    const id = setInterval(() => setTick((t) => t + 1), QUIET_TICK_MS);
    return () => clearInterval(id);
  }, []);
  const focusAssistActive = useAtomValue(focusAssistActiveAtom);
  const manualDnd = useAtomValue(manualDndAtom);
  const snoozeUntil = useAtomValue(notificationSnoozeUntilAtom);
  const [quietHoursEnabled] = useSetting(settingsAtom, 'quietHoursEnabled');
  const [quietHoursStart] = useSetting(settingsAtom, 'quietHoursStart');
  const [quietHoursEnd] = useSetting(settingsAtom, 'quietHoursEnd');

  return isNotificationsQuiet({
    focusAssistActive,
    manualDnd,
    snoozeUntil,
    quietHoursEnabled,
    quietHoursStart,
    quietHoursEnd,
  });
}