import type { Socket } from './types';
import type { Store } from '../../common/types';

export enum SessionRecordingStatus {
  Off,
  Requesting,
  Recording,
}

export interface State {
  recordingState: SessionRecordingStatus;
  currentTab?: string;
}

export default class ScreenRecording {
  private assistVersion = 1;

  onDeny: () => void = () => {};

  static readonly INITIAL_STATE: Readonly<State> = {
    recordingState: SessionRecordingStatus.Off,
  };

  constructor(
    private store: Store<State>,
    private socket: Socket,
    private agentInfo: object,
    private onToggle: (active: boolean) => void,
    public readonly uiErrorHandler:
      | { error: (msg: string) => void }
      | undefined,
    private getAssistVersion: () => number,
  ) {
    socket.on('recording_accepted', () => {
      this.toggleRecording(true);
    });
    socket.on('recording_rejected', () => {
      this.toggleRecording(false);
      this.onDeny();
    });
    socket.on('recording_busy', () => {
      this.onRecordingBusy();
    });

    this.assistVersion = getAssistVersion();
  }

  private onRecordingBusy = () => {
    this.uiErrorHandler?.error(
      'This session is already being recorded by another agent',
    );
  };

  requestRecording = ({ onDeny }: { onDeny: () => void }) => {
    this.onDeny = onDeny;
    const { recordingState } = this.store.get();
    if (recordingState === SessionRecordingStatus.Requesting) return;

    this.store.update({ recordingState: SessionRecordingStatus.Requesting });
    this.emitData(
      'request_recording',
      JSON.stringify({
        ...this.agentInfo,
        query: document.location.search,
      }),
    );
  };

  private emitData = (event: string, data?: any) => {
    if (this.getAssistVersion() === 1) {
      this.socket.emit(event, data);
    } else {
      this.socket.emit(event, {
        meta: { tabId: this.store.get().currentTab },
        data,
      });
    }
  };

  stopRecording = () => {
    this.emitData('stop_recording');
    this.toggleRecording(false);
  };

  private toggleRecording = (isAccepted: boolean) => {
    this.store.update({
      recordingState: isAccepted
        ? SessionRecordingStatus.Recording
        : SessionRecordingStatus.Off,
    });

    this.onToggle(isAccepted);
  };
}