import { MatrixClient } from 'matrix-js-sdk';
import { CallEmbed } from './CallEmbed';

/**
 * Ask EC to hang up and wait (bounded) until our own RTC membership has left
 * the room's session. Used wherever the embed is about to be torn down for a
 * reason other than the user pressing End — logout (#29) and answering another
 * call while in one (#195) — because disposing the iframe alone leaves a ghost
 * `m.call.member` for everyone else until the delayed leave event expires
 * (~17–30 s measured).
 */
export const hangupCallAndWait = async (
  mx: MatrixClient,
  embed: CallEmbed,
  timeoutMs = 4000,
): Promise<void> => {
  const myUserId = mx.getUserId();
  const myDeviceId = mx.getDeviceId();
  const stillIn = (): boolean =>
    mx.matrixRTC
      .getRoomSession(embed.room)
      .memberships.some((m) => m.sender === myUserId && m.deviceId === myDeviceId);
  try {
    await embed.hangup();
  } catch {
    // widget already gone — fall through to the wait/timeout
  }
  const deadline = Date.now() + timeoutMs;
  while (stillIn() && Date.now() < deadline) {
    // eslint-disable-next-line no-await-in-loop
    await new Promise((r) => {
      setTimeout(r, 150);
    });
  }
};