import { useEffect, useRef } from 'react';
import { useSetAtom } from 'jotai';
import { CallEmbed } from '../plugins/call';
import { useCallHangupEvent } from './useCallEmbed';
import { toastQueueAtom } from '../state/toast';
import { describeCallDetails, describeCallEnd } from '../utils/callSummary';
import { callSummaryViewAtom } from '../state/callSummary';
import { useSetting } from '../state/hooks/settings';
import { settingsAtom } from '../state/settings';

// The fork sends io.lotus.call_summary on SFU disconnect, which normally lands
// before Element Call's hangup echo; give a late one this long before toasting.
const SUMMARY_GRACE_MS = 400;

/**
 * [Gitea #143] "Call ended · 41 min · connection was good" in the existing
 * toast style when a call you were in ends. Duration comes from our own
 * join clock; the quality readout from the fork, if it arrived.
 */
export function useCallEndedToast(embed: CallEmbed): void {
  const setToast = useSetAtom(toastQueueAtom);
  const setSummaryView = useSetAtom(callSummaryViewAtom);
  const [callSummaryToast] = useSetting(settingsAtom, 'callSummaryToast');
  const fired = useRef(false);

  useEffect(() => {
    fired.current = false;
  }, [embed]);

  useCallHangupEvent(embed, () => {
    if (fired.current || !embed.joined || embed.joinedAt === undefined) return;
    fired.current = true;
    if (!callSummaryToast) return;
    const durationMs = Date.now() - embed.joinedAt;
    const deafenedMs = embed.deafenedMs();
    const roomName = embed.room.name ?? 'Voice call';
    const nameOf = (userId: string) => embed.room.getMember(userId)?.name ?? userId;
    const toast = () =>
      setToast({
        id: `call-ended-${Date.now()}`,
        displayName: 'Lotus Chat',
        body: describeCallEnd(durationMs, embed.lastSummary),
        roomName,
        roomId: embed.roomId,
        // [Gitea #253] The full breakdown, snapshotted at hangup.
        actionLabel: 'Details',
        onAction: () =>
          setSummaryView({
            roomName,
            sections: describeCallDetails(embed.lastSummary, durationMs, deafenedMs, nameOf),
          }),
      });
    if (embed.lastSummary) toast();
    else setTimeout(toast, SUMMARY_GRACE_MS);
  });
}