/*
 * Copyright (C) 2012 Google Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer
 *    in the documentation and/or other materials provided with the
 *    distribution.
 * 3. Neither the name of Google Inc. nor the names of its contributors
 *    may be used to endorse or promote products derived from this
 *    software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

// https://w3c.github.io/webrtc-pc/#state-definitions

enum RTCSignalingState {
    "stable",
    "have-local-offer",
    "have-remote-offer",
    "have-local-pranswer",
    "have-remote-pranswer",
    "closed"
};

enum RTCIceGatheringState {
    "new",
    "gathering",
    "complete"
};

enum RTCIceConnectionState {
    "new",
    "checking",
    "connected",
    "completed",
    "failed",
    "disconnected",
    "closed"
};

// https://w3c.github.io/webrtc-pc/#interface-definition

// TODO(guidou): Many types are of the wrong type in this interface:
//  * Dictionary -> specific dictionary types like RTCConfiguration
//  * VoidCallback -> VoidFunction
[
    GarbageCollected,
    DependentLifetime,
    // TODO(guidou): There should only be one constructor argument, and it
    // should be optional.
    Constructor(Dictionary rtcConfiguration, optional Dictionary mediaConstraints),
    ConstructorCallWith=ExecutionContext,
    NoInterfaceObject,
    RaisesException=Constructor,
] interface RTCPeerConnection : EventTarget {
    // Promise<RTCSessionDescription> createOffer(optional RTCOfferOptions options);
    // Promise<RTCSessionDescription> createAnswer(optional RTCAnswerOptions options);
    [CallWith=ScriptState] Promise<void> setLocalDescription(RTCSessionDescriptionInit description);
    readonly attribute RTCSessionDescription? localDescription;
    // readonly attribute RTCSessionDescription? currentLocalDescription;
    // readonly attribute RTCSessionDescription? pendingLocalDescription;
    [CallWith=ScriptState] Promise<void> setRemoteDescription(RTCSessionDescriptionInit description);
    readonly attribute RTCSessionDescription? remoteDescription;
    // readonly attribute RTCSessionDescription? currentRemoteDescription;
    // readonly attribute RTCSessionDescription? pendingRemoteDescription;
    [CallWith=ScriptState] Promise<void> addIceCandidate ((RTCIceCandidateInit or RTCIceCandidate) candidate);
    readonly attribute RTCSignalingState signalingState;
    readonly attribute RTCIceGatheringState iceGatheringState;
    readonly attribute RTCIceConnectionState iceConnectionState;
    // readonly attribute boolean? canTrickleIceCandidates;
    // RTCConfiguration getConfiguration();
    // void setConfiguration(RTCConfiguration configuration);
    // TODO(guidou): close() should never throw an exception.
    [RaisesException] void close();
    attribute EventHandler onnegotiationneeded;
    attribute EventHandler onicecandidate;
    attribute EventHandler onsignalingstatechange;
    attribute EventHandler oniceconnectionstatechange;
    // attribute EventHandler onicegatheringstatechange;

    // https://w3c.github.io/webrtc-pc/#legacy-interface-extensions
    // These methods return or will be changed to return Promise<void> because
    // having Promise-based versions requires that all overloads return Promises.
    [CallWith=ExecutionContext, RaisesException] void createOffer(RTCSessionDescriptionCallback successCallback, RTCPeerConnectionErrorCallback failureCallback, optional Dictionary rtcOfferOptions);
    // TODO(guidou): There should be no mediaConstraints argument.
    [CallWith=ExecutionContext, RaisesException] void createAnswer(RTCSessionDescriptionCallback successCallback, RTCPeerConnectionErrorCallback failureCallback, optional Dictionary mediaConstraints);
    [CallWith=ScriptState] Promise<void> setLocalDescription(RTCSessionDescription description, VoidCallback successCallback, [Default=Undefined] optional RTCPeerConnectionErrorCallback failureCallback);
    // TODO(guidou): The failureCallback argument should be non-optional.
    [CallWith=ScriptState] Promise<void> setRemoteDescription(RTCSessionDescription description, VoidCallback successCallback, [Default=Undefined] optional RTCPeerConnectionErrorCallback failureCallback);
    [CallWith=ScriptState] Promise<void> addIceCandidate(RTCIceCandidate candidate, VoidCallback successCallback, RTCPeerConnectionErrorCallback failureCallback);
    // TODO(guidou): The selector argument should the first (nullable,
    // non-optional) argument, and there should be a third failureCallback
    // argument.
    [CallWith=ExecutionContext, LegacyInterfaceTypeChecking] void getStats(RTCStatsCallback successCallback, [Default=Undefined] optional MediaStreamTrack selector);

    // https://w3c.github.io/webrtc-pc/#peer-to-peer-data-api
    // TODO(guidou): The label argument should have [TreatNullAs=EmptyString]
    // and be non-nullable.
    [RaisesException] RTCDataChannel createDataChannel([TreatUndefinedAs=NullString] DOMString? label, optional Dictionary options);
    attribute EventHandler ondatachannel;

    // Non-standard or removed from the spec:
    [CallWith=ExecutionContext, RaisesException] void updateIce(optional Dictionary configuration, optional Dictionary mediaConstraints);
    sequence<MediaStream> getLocalStreams();
    sequence<MediaStream> getRemoteStreams();
    MediaStream getStreamById(DOMString streamId);
    [CallWith=ExecutionContext, RaisesException] void addStream(MediaStream? stream, optional Dictionary mediaConstraints);
    [RaisesException] void removeStream(MediaStream? stream);
    [RaisesException] RTCDTMFSender createDTMFSender(MediaStreamTrack track);
    attribute EventHandler onaddstream;
    attribute EventHandler onremovestream;

    // Certificate management
    // http://w3c.github.io/webrtc-pc/#sec.cert-mgmt
    [RaisesException, CallWith=ScriptState] static Promise<RTCCertificate> generateCertificate(AlgorithmIdentifier keygenAlgorithm);
};