/*
 * 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
[
    ActiveScriptWrappable,
    DependentLifetime,
    // TODO(guidou): There should only be one constructor argument.
    Constructor(optional RTCConfiguration configuration, optional Dictionary mediaConstraints),
    ConstructorCallWith=ExecutionContext,
    RaisesException=Constructor
] interface RTCPeerConnection : EventTarget {
    [CallWith=ScriptState] Promise<RTCSessionDescription> createOffer(optional RTCOfferOptions options);
    [CallWith=ScriptState] 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, MeasureAs=RTCPeerConnectionAddIceCandidatePromise] 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();
    [CallWith=ScriptState, RaisesException] void setConfiguration(RTCConfiguration configuration);
    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 Promise<void> because having Promise-based versions requires that all overloads return Promises.
    [CallWith=ScriptState, RaisesException] Promise<void> createOffer(RTCSessionDescriptionCallback successCallback, RTCPeerConnectionErrorCallback failureCallback, optional Dictionary rtcOfferOptions);
    // TODO(guidou): There should be no mediaConstraints argument.
    [CallWith=ScriptState] Promise<void> createAnswer(RTCSessionDescriptionCallback successCallback, RTCPeerConnectionErrorCallback failureCallback, optional Dictionary mediaConstraints);
    [CallWith=ScriptState] Promise<void> setLocalDescription(RTCSessionDescriptionInit description, VoidCallback successCallback, [Default=Undefined] optional RTCPeerConnectionErrorCallback failureCallback);
    // TODO(guidou): The failureCallback argument should be non-optional.
    [CallWith=ScriptState] Promise<void> setRemoteDescription(RTCSessionDescriptionInit description, VoidCallback successCallback, [Default=Undefined] optional RTCPeerConnectionErrorCallback failureCallback);
    [CallWith=ScriptState, MeasureAs=RTCPeerConnectionAddIceCandidateLegacy] Promise<void> addIceCandidate((RTCIceCandidateInit or 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=ScriptState, LegacyInterfaceTypeChecking] Promise<void> getStats(RTCStatsCallback successCallback, optional MediaStreamTrack? selector);
    // TODO(hbos): The spec has an optional |selector| argument that is not
    // supported yet. There is a discussion about what to do with it (clarify
    // spec, remove it or change it?): https://github.com/w3c/webrtc-stats/issues/116
    [CallWith=ScriptState] Promise<RTCStatsReport> getStats();

    // RTP Media API
    // https://w3c.github.io/webrtc-pc/#dom-rtcpeerconnection-getsenders
    [RuntimeEnabled=RTCRtpSender] sequence<RTCRtpSender> getSenders();
    // https://w3c.github.io/webrtc-pc/#dom-rtcpeerconnection-getreceivers
    sequence<RTCRtpReceiver> getReceivers();
    // https://w3c.github.io/webrtc-pc/#dom-rtcpeerconnection-addtrack
    [RuntimeEnabled=RTCRtpSender, RaisesException] RTCRtpSender addTrack(MediaStreamTrack track, MediaStream... streams);
    // https://w3c.github.io/webrtc-pc/#dom-rtcpeerconnection-removetrack
    [RuntimeEnabled=RTCRtpSender, RaisesException] void removeTrack(RTCRtpSender sender);
    // https://w3c.github.io/webrtc-pc/#dom-rtcpeerconnection-ontrack
    [RuntimeEnabled=RTCRtpSender] attribute EventHandler ontrack;

    // https://w3c.github.io/webrtc-pc/#peer-to-peer-data-api
    [CallWith=ScriptState, RaisesException] RTCDataChannel createDataChannel(USVString label, optional RTCDataChannelInit dataChannelDict);
    attribute EventHandler ondatachannel;

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

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