import { Room } from 'matrix-js-sdk';
import { useMemo } from 'react';
import { useStateEvent } from './useStateEvent';
import { StateEvent } from '../../types/matrix/room';
import { RoomQualityContent } from '../utils/callQuality';

export type RoomCallPolicy = {
  allowCamera: boolean;
  allowScreenshare: boolean;
};

/**
 * [Gitea #26] Shared room-level camera/screenshare policy, read from the
 * `io.lotus.room_quality` state event. Absent/true = allowed; only an explicit
 * `false` forbids. Hoisted out of `CallControls` so other call surfaces (e.g.
 * the app-wide `CallStatus` bar) can apply the same gating.
 */
export const useRoomCallPolicy = (room: Room): RoomCallPolicy => {
  const roomQualityEvent = useStateEvent(room, StateEvent.LotusRoomQuality);

  return useMemo(() => {
    const roomQuality = roomQualityEvent?.getContent<RoomQualityContent>();
    return {
      allowCamera: roomQuality?.allow_camera !== false,
      allowScreenshare: roomQuality?.allow_screenshare !== false,
    };
  }, [roomQualityEvent]);
};