/* eslint-disable no-console */
/* eslint-disable import/no-extraneous-dependencies */
import {
  Room,
  RoomEvent,
  RemoteParticipant,
  RemoteTrackPublication,
  ConnectionState,
  ParticipantEvent,
  Participant,
  LocalTrackPublication,
  Track,
} from 'livekit-client';
import { MatrixClient } from 'matrix-js-sdk';
import {
  ActiveCall,
  CallEvent,
  CallEventType,
  CallServiceConfig,
  CallState,
  CallType,
  LiveKitJWTResponse,
  CallMemberEventContent,
} from './types';
import { fetchLiveKitJWT, fetchWellKnownWithRTC, getLiveKitFocus, requestOpenIdToken } from './useRtcConfig';
import { getAudioSettings, SCREEN_SHARE_RESOLUTIONS, SCREEN_SHARE_BITRATES } from '../settings/audio/Audio';
import { getCallSounds, CallSoundType } from './CallSounds';

type CallEventListener = (event: CallEvent) => void;

/** The Matrix state event type for call membership (MSC3401) */
const CALL_MEMBER_EVENT_TYPE = 'org.matrix.msc3401.call.member';

/**
 * Service for managing Matrix RTC calls via LiveKit
 * Handles LiveKit connections, media streams, call state, and Matrix room signaling
 */
/** How often to refresh call membership to prevent expiry (45 minutes) */
const MEMBERSHIP_REFRESH_INTERVAL_MS = 45 * 60 * 1000;

/** Call membership expiry time (1 hour) */
const MEMBERSHIP_EXPIRY_MS = 60 * 60 * 1000;

/**
 * Check WebRTC capabilities and log diagnostic information
 */
function checkWebRTCSupport(): { supported: boolean; details: Record<string, unknown> } {
  const details: Record<string, unknown> = {
    userAgent: navigator.userAgent,
    platform: navigator.platform,
  };

  // Check for key WebRTC APIs
  details.hasGetUserMedia = !!(navigator.mediaDevices && navigator.mediaDevices.getUserMedia);
  details.hasRTCPeerConnection = !!(window.RTCPeerConnection);
  details.hasRTCDataChannel = !!(window.RTCPeerConnection && window.RTCPeerConnection.prototype.createDataChannel);
  
  // Check WebKit-specific APIs
  details.hasWebkitGetUserMedia = !!(navigator.getUserMedia || (navigator as any).webkitGetUserMedia);
  details.hasWebkitRTCPeerConnection = !!((window as any).webkitRTCPeerConnection);
  
  // Check if mediaDevices API exists
  details.hasMediaDevices = !!navigator.mediaDevices;
  details.hasEnumerateDevices = !!(navigator.mediaDevices && navigator.mediaDevices.enumerateDevices);

  const supported = !!(
    (navigator.mediaDevices && navigator.mediaDevices.getUserMedia) &&
    (window.RTCPeerConnection || (window as any).webkitRTCPeerConnection)
  );

  return { supported, details };
}

/**
 * Service for managing Matrix RTC calls via LiveKit
 * Handles LiveKit connections, media streams, call state, and Matrix room signaling
 */
export class CallService {
  private config: CallServiceConfig;

  private matrixClient: MatrixClient;

  private activeCall: ActiveCall | null = null;

  private listeners: Set<CallEventListener> = new Set();

  private livekitRoom: Room | null = null;

  private livekitJwt: LiveKitJWTResponse | null = null;

  private membershipRefreshInterval: ReturnType<typeof setInterval> | null = null;

  private currentCallId: string | null = null;

  private wasMutedBeforeDeafen = false;

  /**
   * Creates a new CallService instance
   * @param config - Service configuration including homeserver and LiveKit URLs
   * @param matrixClient - The Matrix client for sending state events
   */
  constructor(config: CallServiceConfig, matrixClient: MatrixClient) {
    this.config = config;
    this.matrixClient = matrixClient;
  }

  /**
   * Subscribes to call events
   * @param listener - Callback function for call events
   * @returns Unsubscribe function
   */
  on(listener: CallEventListener): () => void {
    this.listeners.add(listener);
    return () => this.listeners.delete(listener);
  }

  /**
   * Emits a call event to all listeners
   */
  private emit(event: CallEvent): void {
    this.listeners.forEach((listener) => listener(event));
  }

  /**
   * Updates call state and emits event
   */
  private setState(state: CallState): void {
    if (this.activeCall) {
      this.activeCall.state = state;
      this.emit({
        type: CallEventType.StateChanged,
        roomId: this.activeCall.roomId,
        data: { state },
      });
    }
  }

  /**
   * Gets the current active call
   */
  getActiveCall(): ActiveCall | null {
    return this.activeCall;
  }

  /**
   * Checks if calls are supported on this homeserver
   */
  async isCallSupported(): Promise<boolean> {
    try {
      const wellKnown = await fetchWellKnownWithRTC(this.config.homeserverBaseUrl);
      return getLiveKitFocus(wellKnown) !== undefined;
    } catch {
      return false;
    }
  }

  /**
   * Generates a unique call ID for this session
   */
  private generateCallId(): string {
    return `${this.config.deviceId}_${Date.now()}`;
  }

  /**
   * Sends a call member state event to announce participation in a call
   * @param roomId - The Matrix room ID
   * @param callId - The unique call ID
   * @param active - Whether the user is actively in the call
   */
  private async sendCallMemberEvent(
    roomId: string,
    callId: string,
    active: boolean
  ): Promise<void> {
    const stateKey = this.config.userId;

    if (active) {
      const content: CallMemberEventContent = {
        'm.calls': [
          {
            'm.call_id': callId,
            'm.devices': [
              {
                device_id: this.config.deviceId,
                session_id: callId,
                expires_ts: Date.now() + MEMBERSHIP_EXPIRY_MS,
                feeds: [
                  { purpose: 'usermedia' },
                ],
              },
            ],
          },
        ],
      };

      // eslint-disable-next-line @typescript-eslint/no-explicit-any
      await (this.matrixClient as any).sendStateEvent(
        roomId,
        CALL_MEMBER_EVENT_TYPE,
        content,
        stateKey
      );
    } else {
      // Clear the call membership by sending empty calls array
      const content: CallMemberEventContent = {
        'm.calls': [],
      };

      // eslint-disable-next-line @typescript-eslint/no-explicit-any
      await (this.matrixClient as any).sendStateEvent(
        roomId,
        CALL_MEMBER_EVENT_TYPE,
        content,
        stateKey
      );
    }
  }

  /**
   * Starts periodic refresh of call membership to prevent expiry
   * Refreshes every 45 minutes to ensure the 1 hour expiry is never reached
   * @param roomId - The Matrix room ID
   * @param callId - The unique call ID
   */
  private startMembershipRefresh(roomId: string, callId: string): void {
    this.stopMembershipRefresh();

    this.membershipRefreshInterval = setInterval(async () => {
      if (!this.activeCall || this.activeCall.roomId !== roomId) {
        this.stopMembershipRefresh();
        return;
      }

      try {
        console.log('Refreshing call membership to prevent expiry');
        await this.sendCallMemberEvent(roomId, callId, true);
        console.log('Call membership refreshed successfully');
      } catch (error) {
        console.error('Failed to refresh call membership:', error);
      }
    }, MEMBERSHIP_REFRESH_INTERVAL_MS);

    console.log('Started call membership refresh interval (every 45 minutes)');
  }

  /**
   * Stops the membership refresh interval
   */
  private stopMembershipRefresh(): void {
    if (this.membershipRefreshInterval) {
      clearInterval(this.membershipRefreshInterval);
      this.membershipRefreshInterval = null;
      console.log('Stopped call membership refresh interval');
    }
  }

  /**
   * Starts a call in the specified room
   * @param roomId - The Matrix room ID to start the call in
   * @param callType - Voice or video call
   */
  async startCall(roomId: string, callType: CallType): Promise<void> {
    if (this.activeCall) {
      throw new Error('A call is already active');
    }

    const callId = this.generateCallId();

    this.activeCall = {
      roomId,
      callType,
      state: CallState.Connecting,
      startTime: Date.now(),
      remoteStreams: new Map(),
      remoteScreenStreams: new Map(),
      remoteScreenTracks: new Map(),
      participants: [],
      activeSpeakers: new Set(),
      mutedParticipants: new Set(),
      isMuted: false,
      isDeafened: false,
      isVideoEnabled: callType === CallType.Video,
      isScreenSharing: false,
    };

    // Play connecting/dialing sound
    getCallSounds().playSound(CallSoundType.CallDialing, true);

    this.emit({
      type: CallEventType.StateChanged,
      roomId,
      data: { state: CallState.Connecting },
    });

    try {
      // Step 1: Get an OpenID token from the Matrix homeserver
      const openIdToken = await requestOpenIdToken(
        this.config.homeserverBaseUrl,
        this.config.userId,
        this.config.accessToken
      );

      // Step 2: Determine LiveKit service URL (check room-level config first)
      let livekitServiceUrl = this.config.livekitServiceUrl;
      
      // Check if room has a custom LiveKit config
      const room = this.matrixClient.getRoom(roomId);
      if (room) {
        const livekitConfigEvent = room.currentState.getStateEvents('im.paarrot.room.livekit_config', '');
        if (livekitConfigEvent) {
          const roomLivekitUrl = livekitConfigEvent.getContent()?.service_url;
          if (roomLivekitUrl) {
            console.log('Using room-level LiveKit URL:', roomLivekitUrl);
            livekitServiceUrl = roomLivekitUrl;
          }
        }
      }

      // Step 3: Exchange OpenID token for LiveKit JWT
      console.log('Requesting LiveKit JWT for Matrix room:', roomId);
      this.livekitJwt = await fetchLiveKitJWT(
        livekitServiceUrl,
        roomId,
        this.config.userId,
        this.config.deviceId,
        openIdToken
      );

      console.log('Got LiveKit JWT, connecting to:', this.livekitJwt.url);
      console.log('LiveKit JWT response:', JSON.stringify(this.livekitJwt));

      // Check WebRTC support before attempting connection
      const webrtcCheck = checkWebRTCSupport();
      console.log('WebRTC support check:', webrtcCheck);
      
      if (!webrtcCheck.supported) {
        console.warn('WebRTC may not be fully supported. Attempting connection anyway...');
        console.warn('WebRTC details:', JSON.stringify(webrtcCheck.details, null, 2));
      }

      // Step 4: Create and connect to LiveKit room
      this.livekitRoom = new Room({
        adaptiveStream: true,
        dynacast: true,
      });

      this.setupLiveKitEventHandlers();

      await this.livekitRoom.connect(this.livekitJwt.url, this.livekitJwt.jwt);

      console.log('Connected to LiveKit room');
      console.log('LiveKit room name:', this.livekitRoom.name);
      console.log('Local participant identity:', this.livekitRoom.localParticipant.identity);
      console.log('Remote participants:', this.livekitRoom.remoteParticipants.size);

      // Get user's audio device preferences
      const audioSettings = getAudioSettings();
      console.log('Using audio settings:', audioSettings);

      // Build audio capture options with processing settings
      const audioCaptureOptions = {
        deviceId: audioSettings.microphoneId || undefined,
        noiseSuppression: audioSettings.noiseSuppression,
        echoCancellation: audioSettings.echoCancellation,
        autoGainControl: audioSettings.autoGainControl,
      };

      console.log('Audio capture options:', audioCaptureOptions);

      // Step 5: Publish local tracks based on call type with selected devices and processing
      if (callType === CallType.Video) {
        // For video calls, enable both camera and microphone
        await this.livekitRoom.localParticipant.setCameraEnabled(true);
        await this.livekitRoom.localParticipant.setMicrophoneEnabled(true, audioCaptureOptions);
      } else {
        // Voice call - only enable microphone with preferred device and processing
        await this.livekitRoom.localParticipant.setMicrophoneEnabled(true, audioCaptureOptions);
      }

      // Step 6: Send Matrix state event to announce participation
      // This state event will be rendered in the timeline as a "joined the call" notification
      await this.sendCallMemberEvent(roomId, callId, true);
      this.currentCallId = callId;

      // Step 7: Start periodic membership refresh to prevent expiry after 1 hour
      this.startMembershipRefresh(roomId, callId);

      console.log('Announced call participation to Matrix room');

      // Stop dialing sound and play join sound
      getCallSounds().stopDialingLoop();
      getCallSounds().playSound(CallSoundType.CallJoined);

      this.setState(CallState.Connected);
    } catch (error) {
      console.error('Failed to start call:', error);
      this.setState(CallState.Error);
      this.emit({
        type: CallEventType.Error,
        roomId,
        data: { error },
      });
      throw error;
    }
  }

  /**
   * Sets up LiveKit room event handlers
   */
  private setupLiveKitEventHandlers(): void {
    if (!this.livekitRoom) return;

    this.livekitRoom.on(RoomEvent.ConnectionStateChanged, (state: ConnectionState) => {
      console.log('LiveKit connection state:', state);

      if (!this.activeCall) return;

      switch (state) {
        case ConnectionState.Connected:
          this.setState(CallState.Connected);
          break;
        case ConnectionState.Reconnecting:
          this.setState(CallState.Reconnecting);
          break;
        case ConnectionState.Disconnected:
          this.setState(CallState.Ended);
          break;
        default:
          break;
      }
    });

    this.livekitRoom.on(
      RoomEvent.TrackSubscribed,
      (
        track: RemoteTrackPublication['track'],
        publication: RemoteTrackPublication,
        participant: RemoteParticipant
      ) => {
        if (!track || !this.activeCall) return;

        const isScreenShare = publication.source === Track.Source.ScreenShare || 
                              publication.source === Track.Source.ScreenShareAudio;
        
        console.log('Track subscribed:', track.kind, 'source:', publication.source, 
                    'isScreenShare:', isScreenShare, 'from', participant.identity);
        console.log('Track mediaStreamTrack:', track.mediaStreamTrack);
        console.log('Track mediaStreamTrack readyState:', track.mediaStreamTrack?.readyState);
        console.log('Track mediaStreamTrack enabled:', track.mediaStreamTrack?.enabled);

        // For audio tracks, attach to an audio element to play
        if (track.kind === 'audio') {
          const audioElement = track.attach() as HTMLAudioElement;
          audioElement.id = `audio-${participant.identity}-${publication.source}`;
          
          // Set the preferred output device if supported and selected
          const audioSettings = getAudioSettings();
          if (audioSettings.speakerId && 'setSinkId' in audioElement) {
            (audioElement as HTMLAudioElement & { setSinkId: (id: string) => Promise<void> })
              .setSinkId(audioSettings.speakerId)
              .then(() => console.log('Speaker set to:', audioSettings.speakerId))
              .catch((e) => console.warn('Could not set speaker device:', e));
          }
          
          document.body.appendChild(audioElement);
          console.log('Audio element attached for', participant.identity);
          
          // If we're currently deafened, mute this new track so we don't hear them
          if (this.activeCall?.isDeafened) {
            track.setMuted(true);
            console.log('Auto-muted new audio track from', participant.identity, 'due to deafen state');
          }
        }

        // Handle screen share video tracks separately
        if (isScreenShare && track.kind === 'video') {
          const mediaStream = new MediaStream([track.mediaStreamTrack]);
          
          console.log('📺 Screen share received from', participant.identity);
          console.log('📺 Screen share track:', track);
          console.log('📺 Screen share MediaStream:', mediaStream);
          console.log('📺 Screen share MediaStream tracks:', mediaStream?.getTracks());
          
          this.activeCall.remoteScreenStreams.set(participant.identity, mediaStream);
          
          // Store the actual track for proper attachment later
          this.activeCall.remoteScreenTracks.set(participant.identity, {
            participantId: participant.identity,
            track,
            stream: mediaStream,
          });
          
          this.emit({
            type: CallEventType.ScreenShareStarted,
            roomId: this.activeCall.roomId,
            data: {
              participantId: participant.identity,
              stream: mediaStream,
              track,
            },
          });
        } else if (track.kind === 'video') {
          const mediaStream = new MediaStream([track.mediaStreamTrack]);
          this.activeCall.remoteStreams.set(participant.identity, mediaStream);
          
          this.emit({
            type: CallEventType.RemoteStreamAdded,
            roomId: this.activeCall.roomId,
            data: {
              participantId: participant.identity,
              stream: mediaStream,
            },
          });
        }

        // Update participants list
        if (!this.activeCall.participants.includes(participant.identity)) {
          this.activeCall.participants.push(participant.identity);
        }
      }
    );

    this.livekitRoom.on(
      RoomEvent.TrackUnsubscribed,
      (
        track: RemoteTrackPublication['track'],
        publication: RemoteTrackPublication,
        participant: RemoteParticipant
      ) => {
        if (!this.activeCall) return;

        const isScreenShare = publication.source === Track.Source.ScreenShare || 
                              publication.source === Track.Source.ScreenShareAudio;

        console.log('Track unsubscribed:', track?.kind, 'source:', publication.source,
                    'isScreenShare:', isScreenShare, 'from', participant.identity);

        // Remove audio element if it exists
        if (track?.kind === 'audio') {
          const audioElement = document.getElementById(`audio-${participant.identity}-${publication.source}`);
          if (audioElement) {
            audioElement.remove();
            console.log('Audio element removed for', participant.identity);
          }
          track.detach();
        }

        // Handle screen share removal
        if (isScreenShare && track?.kind === 'video') {
          // Detach the track from any elements
          track.detach();
          this.activeCall.remoteScreenStreams.delete(participant.identity);
          this.activeCall.remoteScreenTracks.delete(participant.identity);
          console.log('📺 Screen share ended from', participant.identity);
          
          this.emit({
            type: CallEventType.ScreenShareStopped,
            roomId: this.activeCall.roomId,
            data: { participantId: participant.identity },
          });
        } else if (track?.kind === 'video') {
          this.activeCall.remoteStreams.delete(participant.identity);
          
          this.emit({
            type: CallEventType.RemoteStreamRemoved,
            roomId: this.activeCall.roomId,
            data: { participantId: participant.identity },
          });
        }
      }
    );

    this.livekitRoom.on(RoomEvent.ParticipantConnected, (participant: RemoteParticipant) => {
      console.log('Participant connected:', participant.identity, 'in Matrix room:', this.activeCall?.roomId);
      console.log('Current LiveKit room name:', this.livekitRoom?.name);

      // Listen for this participant's speaking state
      participant.on(ParticipantEvent.IsSpeakingChanged, (speaking: boolean) => {
        if (speaking) {
          console.log(`🔊 ${participant.identity} is speaking`);
        } else {
          console.log(`🔈 ${participant.identity} stopped speaking`);
        }
      });

      if (this.activeCall && !this.activeCall.participants.includes(participant.identity)) {
        this.activeCall.participants.push(participant.identity);
        
        // Play join sound for remote participant
        getCallSounds().playSound(CallSoundType.CallJoined);
        
        this.emit({
          type: CallEventType.ParticipantJoined,
          roomId: this.activeCall.roomId,
          data: { participantId: participant.identity },
        });
      }
    });

    this.livekitRoom.on(RoomEvent.ParticipantDisconnected, (participant: RemoteParticipant) => {
      console.log('Participant disconnected:', participant.identity);

      if (this.activeCall) {
        this.activeCall.participants = this.activeCall.participants.filter(
          (p) => p !== participant.identity
        );
        this.activeCall.remoteStreams.delete(participant.identity);

        // Play leave sound for remote participant
        getCallSounds().playSound(CallSoundType.CallDepart);

        this.emit({
          type: CallEventType.ParticipantLeft,
          roomId: this.activeCall.roomId,
          data: { participantId: participant.identity },
        });
      }
    });

    this.livekitRoom.on(RoomEvent.LocalTrackPublished, (publication) => {
      console.log('Local track published:', publication.kind);

      if (this.activeCall && publication.track) {
        const mediaStream = new MediaStream([publication.track.mediaStreamTrack]);
        this.activeCall.localStream = mediaStream;
      }
    });

    // Track mute/unmute events for remote participants
    this.livekitRoom.on(RoomEvent.TrackMuted, (publication, participant) => {
      // Only emit for remote participants and audio tracks
      if (!this.activeCall) return;
      if (participant.identity === this.livekitRoom?.localParticipant.identity) return;
      if (publication.kind !== 'audio') return;
      
      console.log(`🔇 ${participant.identity} muted their microphone`);
      
      // Track muted state
      this.activeCall.mutedParticipants.add(participant.identity);
      
      // Play mute sound for remote participant
      getCallSounds().playSound(CallSoundType.MicMute);
      
      this.emit({
        type: CallEventType.RemoteMuteChanged,
        roomId: this.activeCall.roomId,
        data: { participantId: participant.identity, isMuted: true },
      });
    });

    this.livekitRoom.on(RoomEvent.TrackUnmuted, (publication, participant) => {
      // Only emit for remote participants and audio tracks
      if (!this.activeCall) return;
      if (participant.identity === this.livekitRoom?.localParticipant.identity) return;
      if (publication.kind !== 'audio') return;
      
      console.log(`🔊 ${participant.identity} unmuted their microphone`);
      
      // Track unmuted state
      this.activeCall.mutedParticipants.delete(participant.identity);
      
      // Play unmute sound for remote participant
      getCallSounds().playSound(CallSoundType.MicUnmute);
      
      this.emit({
        type: CallEventType.RemoteMuteChanged,
        roomId: this.activeCall.roomId,
        data: { participantId: participant.identity, isMuted: false },
      });
    });

    // Voice activity detection - logs when speakers change
    // Note: This event tracks remote speakers. Local speaker is tracked separately.
    // We preserve the existing activeSpeakers that may include local user
    this.livekitRoom.on(RoomEvent.ActiveSpeakersChanged, (speakers: Participant[]) => {
      if (!this.activeCall) return;
      
      // Get remote speaker identities
      const remoteSpeakerIds = speakers
        .filter((s) => s.identity !== this.livekitRoom?.localParticipant.identity)
        .map((s) => s.identity);
      
      // Check if local participant is speaking (from LiveKit's list)
      const localSpeaking = speakers.some(
        (s) => s.identity === this.livekitRoom?.localParticipant.identity
      );
      
      // Build new activeSpeakers set - use Matrix user ID for local
      const newSpeakers = new Set<string>(remoteSpeakerIds);
      if (localSpeaking) {
        newSpeakers.add(this.config.userId);
      }
      
      this.activeCall.activeSpeakers = newSpeakers;
      
      if (speakers.length > 0) {
        const speakerNames = speakers.map((s) => s.identity).join(', ');
        console.log('🎤 Active speakers:', speakerNames);
      }
      
      this.emit({
        type: CallEventType.SpeakersChanged,
        roomId: this.activeCall.roomId,
        data: { speakers: newSpeakers },
      });
    });

    // Listen for participant metadata changes (for deafen state)
    this.livekitRoom.on(RoomEvent.ParticipantMetadataChanged, (prevMetadata: string | undefined, participant: Participant) => {
      if (!this.activeCall) return;
      if (participant.identity === this.livekitRoom?.localParticipant.identity) return;
      
      try {
        const prevData = prevMetadata ? JSON.parse(prevMetadata) : {};
        const newData = participant.metadata ? JSON.parse(participant.metadata) : {};
        
        const wasDeafened = prevData.isDeafened === true;
        const isDeafened = newData.isDeafened === true;
        
        if (wasDeafened !== isDeafened) {
          console.log(`🎧 ${participant.identity} ${isDeafened ? 'deafened' : 'undeafened'}`);
          getCallSounds().playSound(isDeafened ? CallSoundType.Deafen : CallSoundType.Undeafen);
        }
      } catch {
        // Ignore metadata parse errors
      }
    });

    // Track local participant speaking state - use Matrix user ID for consistency
    this.livekitRoom.localParticipant.on(ParticipantEvent.IsSpeakingChanged, (speaking: boolean) => {
      if (!this.activeCall) return;
      
      const myUserId = this.config.userId;
      
      if (speaking) {
        console.log('🎙️ You are speaking');
        this.activeCall.activeSpeakers.add(myUserId);
      } else {
        console.log('🔇 You stopped speaking');
        this.activeCall.activeSpeakers.delete(myUserId);
      }
      
      this.emit({
        type: CallEventType.SpeakersChanged,
        roomId: this.activeCall.roomId,
        data: { speakers: this.activeCall.activeSpeakers },
      });
    });

    // Track audio level changes for local participant (more detailed)
    this.livekitRoom.localParticipant.on(ParticipantEvent.AudioStreamAcquired, () => {
      console.log('🎧 Audio stream acquired');
    });
  }

  /**
   * Ends the current call
   */
  async endCall(): Promise<void> {
    if (!this.activeCall) {
      return;
    }

    const { roomId } = this.activeCall;
    this.setState(CallState.Disconnecting);

    // Stop the membership refresh interval
    this.stopMembershipRefresh();

    // Stop any dialing loop and play departure sound
    getCallSounds().stopDialingLoop();
    getCallSounds().playSound(CallSoundType.CallDepart);

    try {
      // Clear Matrix call membership - this state event will be rendered 
      // in the timeline as a "left the call" notification
      await this.sendCallMemberEvent(roomId, '', false);
    } catch (error) {
      console.error('Failed to clear call membership:', error);
    }

    // Clean up all audio elements
    document.querySelectorAll('[id^="audio-"]').forEach((el) => el.remove());

    // Disconnect from LiveKit
    if (this.livekitRoom) {
      this.livekitRoom.disconnect();
      this.livekitRoom = null;
    }

    this.activeCall = null;
    this.livekitJwt = null;
    this.currentCallId = null;

    this.emit({
      type: CallEventType.StateChanged,
      roomId,
      data: { state: CallState.Ended },
    });
  }

  /**
   * Toggles audio mute state
   * Unmuting will also undeafen if currently deafened
   */
  toggleMute(): boolean {
    if (!this.livekitRoom?.localParticipant || !this.activeCall) {
      return false;
    }

    const newMuteState = !this.activeCall.isMuted;
    
    // If unmuting while deafened, undeafen first
    if (!newMuteState && this.activeCall.isDeafened) {
      this.activeCall.isDeafened = false;
      getCallSounds().setDeafened(false);
      
      // Unmute all remote audio tracks
      this.livekitRoom.remoteParticipants.forEach((participant) => {
        participant.audioTrackPublications.forEach((publication) => {
          if (publication.track) {
            publication.track.setMuted(false);
          }
        });
      });
      
      // Broadcast undeafen state
      const metadata = JSON.stringify({ isDeafened: false });
      this.livekitRoom.localParticipant.setMetadata(metadata).catch((err) => {
        console.warn('Failed to set participant metadata:', err);
      });

      // Play undeafen sound
      getCallSounds().playSound(CallSoundType.Undeafen);
    }
    
    this.livekitRoom.localParticipant.setMicrophoneEnabled(!newMuteState);
    this.activeCall.isMuted = newMuteState;

    // Play mute/unmute sound
    getCallSounds().playSound(
      newMuteState ? CallSoundType.MicMute : CallSoundType.MicUnmute
    );

    return newMuteState;
  }

  /**
   * Toggles deafen state (mutes all incoming audio and your mic)
   * Also broadcasts deafen state to other participants via metadata
   */
  toggleDeafen(): boolean {
    if (!this.livekitRoom || !this.activeCall) {
      return false;
    }

    const newDeafenState = !this.activeCall.isDeafened;
    this.activeCall.isDeafened = newDeafenState;

    // Update CallSounds deafen state
    getCallSounds().setDeafened(newDeafenState);

    // Mute/unmute all remote audio tracks (so we don't hear them)
    this.livekitRoom.remoteParticipants.forEach((participant) => {
      participant.audioTrackPublications.forEach((publication) => {
        if (publication.track) {
          publication.track.setMuted(newDeafenState);
        }
      });
    });

    // Handle mic muting when deafening
    if (newDeafenState) {
      // Remember if user was muted before deafening
      this.wasMutedBeforeDeafen = this.activeCall.isMuted;
      
      // Deafening - always mute mic
      if (!this.activeCall.isMuted) {
        this.livekitRoom.localParticipant.setMicrophoneEnabled(false);
        this.activeCall.isMuted = true;
      }
    } else {
      // Undeafening - only unmute if user wasn't muted before deafening
      if (!this.wasMutedBeforeDeafen && this.activeCall.isMuted) {
        this.livekitRoom.localParticipant.setMicrophoneEnabled(true);
        this.activeCall.isMuted = false;
      }
      this.wasMutedBeforeDeafen = false;
    }

    // Broadcast deafen state to other participants via metadata
    const metadata = JSON.stringify({ isDeafened: newDeafenState });
    this.livekitRoom.localParticipant.setMetadata(metadata).catch((err) => {
      console.warn('Failed to set participant metadata:', err);
    });

    // Play deafen/undeafen sound (these always play for user feedback)
    getCallSounds().playSound(
      newDeafenState ? CallSoundType.Deafen : CallSoundType.Undeafen
    );

    return newDeafenState;
  }

  /**
   * Toggles video enabled state
   */
  toggleVideo(): boolean {
    if (!this.livekitRoom?.localParticipant) {
      return false;
    }

    const newVideoState = !this.activeCall?.isVideoEnabled;
    this.livekitRoom.localParticipant.setCameraEnabled(newVideoState);

    if (this.activeCall) {
      this.activeCall.isVideoEnabled = newVideoState;
    }

    return newVideoState;
  }

  /**
   * Gets the LiveKit JWT for the current call
   */
  getLiveKitCredentials(): LiveKitJWTResponse | null {
    return this.livekitJwt;
  }

  /**
   * Gets the LiveKit room instance
   */
  getLiveKitRoom(): Room | null {
    return this.livekitRoom;
  }

  /**
   * Starts screen sharing with configurable resolution and bitrate
   * @returns true if screen share started successfully
   */
  async startScreenShare(): Promise<boolean> {
    if (!this.livekitRoom?.localParticipant || !this.activeCall) {
      console.warn('Cannot start screen share: no active call or room');
      return false;
    }

    if (this.activeCall.isScreenSharing) {
      console.warn('Screen sharing is already active');
      return true;
    }

    try {
      // Preserve current mute state before starting screen share
      const wasMuted = this.activeCall.isMuted;

      const audioSettings = getAudioSettings();
      const resolution = SCREEN_SHARE_RESOLUTIONS[audioSettings.screenShareResolution];

      console.log('Starting screen share with settings:', {
        resolution: audioSettings.screenShareResolution,
        bitrate: audioSettings.screenShareBitrate,
        frameRate: audioSettings.screenShareFrameRate,
      });

      // Build screen share options - LiveKit uses different format
      // Resolution and framerate are set via constraints when creating track
      // Note: audio here is for system/tab audio, not microphone
      const screenShareOptions = {
        audio: true, // Include system audio if available
        resolution: audioSettings.screenShareResolution === 'source'
          ? undefined
          : {
              width: resolution.width,
              height: resolution.height,
              frameRate: audioSettings.screenShareFrameRate,
            },
      };

      // Enable screen share with the configured options
      await this.livekitRoom.localParticipant.setScreenShareEnabled(true, screenShareOptions);

      // Restore mute state - LiveKit might have changed mic state
      if (wasMuted) {
        this.livekitRoom.localParticipant.setMicrophoneEnabled(false);
      }

      // Set bitrate on the screen share track publication
      const screenSharePub = Array.from(
        this.livekitRoom.localParticipant.trackPublications.values()
      ).find(
        (pub): pub is LocalTrackPublication =>
          pub.source === Track.Source.ScreenShare
      );

      if (screenSharePub?.track) {
        console.log(`Screen share started with bitrate: ${SCREEN_SHARE_BITRATES[audioSettings.screenShareBitrate].bitrate}kbps`);
        // Capture local screen stream for preview
        const mediaStream = new MediaStream([screenSharePub.track.mediaStreamTrack]);
        this.activeCall.localScreenStream = mediaStream;
      }

      this.activeCall.isScreenSharing = true;

      this.emit({
        type: CallEventType.StateChanged,
        roomId: this.activeCall.roomId,
        data: { state: this.activeCall.state, isScreenSharing: true },
      });

      console.log('✅ Screen sharing started');
      return true;
    } catch (error) {
      console.error('Failed to start screen share:', error);
      return false;
    }
  }

  /**
   * Stops screen sharing
   * @returns true if screen share stopped successfully
   */
  async stopScreenShare(): Promise<boolean> {
    if (!this.livekitRoom?.localParticipant || !this.activeCall) {
      return false;
    }

    if (!this.activeCall.isScreenSharing) {
      return true;
    }

    try {
      await this.livekitRoom.localParticipant.setScreenShareEnabled(false);
      this.activeCall.isScreenSharing = false;
      this.activeCall.localScreenStream = undefined;

      this.emit({
        type: CallEventType.StateChanged,
        roomId: this.activeCall.roomId,
        data: { state: this.activeCall.state, isScreenSharing: false },
      });

      console.log('🛑 Screen sharing stopped');
      return true;
    } catch (error) {
      console.error('Failed to stop screen share:', error);
      return false;
    }
  }

  /**
   * Toggles screen sharing on/off
   * @returns The new screen sharing state
   */
  async toggleScreenShare(): Promise<boolean> {
    if (this.activeCall?.isScreenSharing) {
      await this.stopScreenShare();
      return false;
    }
    return this.startScreenShare();
  }

  /**
   * Gets the current screen sharing state
   */
  isScreenSharing(): boolean {
    return this.activeCall?.isScreenSharing ?? false;
  }

  /**
   * Cleans up resources
   */
  dispose(): void {
    this.stopMembershipRefresh();
    this.endCall();
    this.listeners.clear();
  }
}