import {EventEmitter} from 'events'

import {ExtraHeaders, Originator, OutgoingListener, SessionDirection, TerminateOptions} from './RTCSession'
import {IncomingResponse} from './SIPMessage'
import {NameAddrHeader} from './NameAddrHeader'
import {causes} from './Constants';

export interface AcceptOptions extends ExtraHeaders {
  body?: string;
}

export interface MessageFailedEvent {
  originator: Originator;
  response: IncomingResponse;
  cause?: causes;
}

export type MessageFailedListener = (event: MessageFailedEvent) => void;

export interface MessageEventMap {
  succeeded: OutgoingListener;
  failed: MessageFailedListener;
}

export interface SendMessageOptions extends ExtraHeaders {
  contentType?: string;
  eventHandlers?: Partial<MessageEventMap>;
  fromUserName?: string;
  fromDisplayName?: string;
}

export class Message extends EventEmitter {
  get direction(): SessionDirection;

  get local_identity(): NameAddrHeader;

  get remote_identity(): NameAddrHeader;

  send(target: string, body: string, options?: SendMessageOptions): void;

  accept(options: AcceptOptions): void;

  reject(options: TerminateOptions): void;

  on<T extends keyof MessageEventMap>(type: T, listener: MessageEventMap[T]): this;
}