/*
Copyright 2023 The Matrix.org Foundation C.I.C.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
import { CallFeedStatsReporter } from "../../../../src/webrtc/stats/callFeedStatsReporter";
import { type CallFeedReport } from "../../../../src/webrtc/stats/statsReport";
import { type CallFeed } from "../../../../src/webrtc/callFeed";

const CALL_ID = "CALL_ID";
const USER_ID = "USER_ID";
describe("CallFeedStatsReporter", () => {
    let rtcSpy: RTCPeerConnection;
    beforeEach(() => {
        rtcSpy = {} as RTCPeerConnection;
        rtcSpy.getTransceivers = jest.fn().mockReturnValue(buildTransceiverMocks());
    });

    describe("should", () => {
        it("builds CallFeedReport", async () => {
            expect(CallFeedStatsReporter.buildCallFeedReport(CALL_ID, USER_ID, rtcSpy)).toMatchSnapshot();
        });

        it("extends CallFeedReport with call feeds", async () => {
            const feed = buildCallFeedMock("1");
            const callFeedList: CallFeed[] = [feed];
            const report = {
                callId: "callId",
                opponentMemberId: "opponentMemberId",
                transceiver: [],
                callFeeds: [],
            } as CallFeedReport;

            expect(CallFeedStatsReporter.expandCallFeedReport(report, callFeedList).callFeeds).toMatchSnapshot();
        });
    });

    const buildTransceiverMocks = (): RTCRtpTransceiver[] => {
        const trans1 = {
            mid: "0",
            direction: "sendrecv",
            currentDirection: "sendonly",
            sender: buildSenderMock("sender_audio_0", "audio"),
            receiver: buildReceiverMock("receiver_audio_0", "audio"),
        } as RTCRtpTransceiver;
        const trans2 = {
            mid: "1",
            direction: "recvonly",
            currentDirection: "sendrecv",
            sender: buildSenderMock("sender_video_1", "video"),
            receiver: buildReceiverMock("receiver_video_1", "video"),
        } as RTCRtpTransceiver;
        const trans3 = {
            mid: "2",
            direction: "recvonly",
            currentDirection: "recvonly",
            sender: { track: null } as RTCRtpSender,
            receiver: buildReceiverMock("receiver_video_2", "video"),
        } as RTCRtpTransceiver;
        return [trans1, trans2, trans3];
    };

    const buildSenderMock = (id: string, kind: "audio" | "video"): RTCRtpSender => {
        const track = buildTrackMock(id, kind);
        return {
            track,
        } as RTCRtpSender;
    };

    const buildReceiverMock = (id: string, kind: "audio" | "video"): RTCRtpReceiver => {
        const track = buildTrackMock(id, kind);
        return {
            track,
        } as RTCRtpReceiver;
    };

    const buildTrackMock = (id: string, kind: "audio" | "video"): MediaStreamTrack => {
        return {
            id,
            kind,
            enabled: true,
            label: "--",
            muted: false,
            readyState: "live",
            getSettings: () => ({ deviceId: `settingDeviceId-${id}` }),
            getConstraints: () => ({ deviceId: `constrainDeviceId-${id}` }),
        } as MediaStreamTrack;
    };

    const buildCallFeedMock = (id: string, isLocal = true): CallFeed => {
        const stream = {
            id: `stream-${id}`,
            getAudioTracks(): MediaStreamTrack[] {
                return [buildTrackMock(`video-${id}`, "video")];
            },
            getVideoTracks(): MediaStreamTrack[] {
                return [buildTrackMock(`audio-${id}`, "audio")];
            },
        } as MediaStream;
        return {
            stream,
            isLocal: () => isLocal,
            isVideoMuted: () => false,
            isAudioMuted: () => true,
        } as CallFeed;
    };
});