import { EventEmitter } from 'events';

import {
	IncomingRequest,
	IncomingResponse,
	OutgoingRequest,
} from './SIPMessage';
import { NameAddrHeader } from './NameAddrHeader';
import { URI } from './URI';
import { UA } from './UA';
import { causes, DTMF_TRANSPORT } from './Constants';

interface RTCPeerConnectionDeprecated extends RTCPeerConnection {
	/**
	 * @deprecated
	 * @see https://developer.mozilla.org/en-US/docs/Web/API/RTCPeerConnection/getRemoteStreams
	 */
	getRemoteStreams(): MediaStream[];
}

export declare enum SessionDirection {
	INCOMING = 'incoming',
	OUTGOING = 'outgoing',
}

export declare enum Originator {
	LOCAL = 'local',
	REMOTE = 'remote',
	SYSTEM = 'system',
}

// options
export interface ExtraHeaders {
	extraHeaders?: string[];
}

export interface AnswerOptions extends ExtraHeaders {
	mediaConstraints?: MediaStreamConstraints;
	mediaStream?: MediaStream;
	pcConfig?: RTCConfiguration;
	rtcConstraints?: object;
	rtcAnswerConstraints?: RTCOfferOptions;
	rtcOfferConstraints?: RTCOfferOptions;
	sessionTimersExpires?: number;
}

export interface RejectOptions extends ExtraHeaders {
	status_code?: number;
	reason_phrase?: string;
}

export interface TerminateOptions extends RejectOptions {
	body?: string;
	cause?: causes | string;
}

export interface ReferOptions extends ExtraHeaders {
	// eslint-disable-next-line @typescript-eslint/no-explicit-any
	eventHandlers?: any;
	replaces?: RTCSession;
}

export interface OnHoldResult {
	local: boolean;
	remote: boolean;
}

export interface DTMFOptions extends ExtraHeaders {
	duration?: number;
	interToneGap?: number;
	transportType?: DTMF_TRANSPORT;
}

export interface HoldOptions extends ExtraHeaders {
	useUpdate?: boolean;
}

export interface RenegotiateOptions extends HoldOptions {
	rtcOfferConstraints?: RTCOfferOptions;
}

// events
export interface DTMF extends EventEmitter {
	tone: string;
	duration: number;
}

export interface Info extends EventEmitter {
	contentType: string;
	body: string;
}

export interface PeerConnectionEvent {
	peerconnection: RTCPeerConnectionDeprecated;
}

export interface ConnectingEvent {
	request: IncomingRequest | OutgoingRequest;
}

export interface SendingEvent {
	request: OutgoingRequest;
}

export interface IncomingEvent {
	originator: Originator.LOCAL;
}

export interface EndEvent {
	originator: Originator;
	message: IncomingRequest | IncomingResponse;
	cause: string;
}

export interface IncomingDTMFEvent {
	originator: Originator.REMOTE;
	dtmf: DTMF;
	request: IncomingRequest;
}

export interface OutgoingDTMFEvent {
	originator: Originator.LOCAL;
	dtmf: DTMF;
	request: OutgoingRequest;
}

export interface IncomingInfoEvent {
	originator: Originator.REMOTE;
	info: Info;
	request: IncomingRequest;
}

export interface OutgoingInfoEvent {
	originator: Originator.LOCAL;
	info: Info;
	request: OutgoingRequest;
}

export interface HoldEvent {
	originator: Originator;
}

export interface ReInviteEvent {
	request: IncomingRequest;
	callback?: VoidFunction;
	reject: (options?: RejectOptions) => void;
}

export interface ReferEvent {
	request: IncomingRequest;
	// eslint-disable-next-line @typescript-eslint/no-unsafe-function-type
	accept: Function;
	reject: VoidFunction;
}

export interface SDPEvent {
	originator: Originator;
	type: string;
	sdp: string;
}

export interface IceCandidateEvent {
	candidate: RTCIceCandidate;
	ready: VoidFunction;
}

export interface OutgoingEvent {
	originator: Originator.REMOTE;
	response: IncomingResponse;
}

export interface OutgoingAckEvent {
	originator: Originator.LOCAL;
}

export interface IncomingAckEvent {
	originator: Originator.REMOTE;
	ack: IncomingRequest;
}

export interface MediaStreamTypes {
	audio?: boolean;
	video?: boolean;
}

// listener
// eslint-disable-next-line @typescript-eslint/no-explicit-any
export type GenericErrorListener = (error: any) => void;
export type PeerConnectionListener = (event: PeerConnectionEvent) => void;
export type ConnectingListener = (event: ConnectingEvent) => void;
export type SendingListener = (event: SendingEvent) => void;
export type IncomingListener = (event: IncomingEvent) => void;
export type OutgoingListener = (event: OutgoingEvent) => void;
export type IncomingConfirmedListener = (event: IncomingAckEvent) => void;
export type OutgoingConfirmedListener = (event: OutgoingAckEvent) => void;
export type CallListener = IncomingListener | OutgoingListener;
export type ConfirmedListener =
	| IncomingConfirmedListener
	| OutgoingConfirmedListener;
export type EndListener = (event: EndEvent) => void;
export type IncomingDTMFListener = (event: IncomingDTMFEvent) => void;
export type OutgoingDTMFListener = (event: OutgoingDTMFEvent) => void;
export type DTMFListener = IncomingDTMFListener | OutgoingDTMFListener;
export type IncomingInfoListener = (event: IncomingInfoEvent) => void;
export type OutgoingInfoListener = (event: OutgoingInfoEvent) => void;
export type InfoListener = IncomingInfoListener | OutgoingInfoListener;
export type HoldListener = (event: HoldEvent) => void;
export type MuteListener = (event: MediaStreamTypes) => void;
export type ReInviteListener = (event: ReInviteEvent) => void;
export type UpdateListener = ReInviteListener;
export type ReferListener = (event: ReferEvent) => void;
export type SDPListener = (event: SDPEvent) => void;
export type IceCandidateListener = (event: IceCandidateEvent) => void;

export interface RTCSessionEventMap {
	peerconnection: PeerConnectionListener;
	connecting: ConnectingListener;
	sending: SendingListener;
	progress: CallListener;
	accepted: CallListener;
	confirmed: ConfirmedListener;
	ended: EndListener;
	failed: EndListener;
	newDTMF: DTMFListener;
	newInfo: InfoListener;
	hold: HoldListener;
	unhold: HoldListener;
	muted: MuteListener;
	unmuted: MuteListener;
	reinvite: ReInviteListener;
	update: UpdateListener;
	refer: ReferListener;
	replaces: ReferListener;
	sdp: SDPListener;
	icecandidate: IceCandidateListener;
	getusermediafailed: GenericErrorListener;
	'peerconnection:createofferfailed': GenericErrorListener;
	'peerconnection:createanswerfailed': GenericErrorListener;
	'peerconnection:setlocaldescriptionfailed': GenericErrorListener;
	'peerconnection:setremotedescriptionfailed': GenericErrorListener;
}

declare enum SessionStatus {
	STATUS_NULL = 0,
	STATUS_INVITE_SENT = 1,
	STATUS_1XX_RECEIVED = 2,
	STATUS_INVITE_RECEIVED = 3,
	STATUS_WAITING_FOR_ANSWER = 4,
	STATUS_ANSWERED = 5,
	STATUS_WAITING_FOR_ACK = 6,
	STATUS_CANCELED = 7,
	STATUS_TERMINATED = 8,
	STATUS_CONFIRMED = 9,
}

export class RTCSession extends EventEmitter {
	constructor(ua: UA);

	static get C(): typeof SessionStatus;

	get C(): typeof SessionStatus;

	get causes(): typeof causes;

	get id(): string;

	// eslint-disable-next-line @typescript-eslint/no-explicit-any
	set data(_data: any);
	// eslint-disable-next-line @typescript-eslint/no-explicit-any
	get data(): any;

	get connection(): RTCPeerConnectionDeprecated;

	get contact(): string;

	get direction(): SessionDirection;

	get local_identity(): NameAddrHeader;

	get remote_identity(): NameAddrHeader;

	get start_time(): Date;

	get end_time(): Date;

	get status(): SessionStatus;

	isInProgress(): boolean;

	isEstablished(): boolean;

	isEnded(): boolean;

	isReadyToReOffer(): boolean;

	answer(options?: AnswerOptions): void;

	terminate(options?: TerminateOptions): void;

	sendDTMF(tones: string | number, options?: DTMFOptions): void;

	sendInfo(contentType: string, body?: string, options?: ExtraHeaders): void;

	hold(options?: HoldOptions, done?: VoidFunction): boolean;

	unhold(options?: HoldOptions, done?: VoidFunction): boolean;

	renegotiate(options?: RenegotiateOptions, done?: VoidFunction): boolean;

	isOnHold(): OnHoldResult;

	mute(options?: MediaStreamTypes): void;

	unmute(options?: MediaStreamTypes): void;

	isMuted(): MediaStreamTypes;

	refer(target: string | URI, options?: ReferOptions): void;

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