/*
Copyright 2024 New Vector Ltd.
Copyright 2022 The Matrix.org Foundation C.I.C.

SPDX-License-Identifier: AGPL-3.0-only OR GPL-3.0-only
Please see LICENSE files in the repository root for full details.
*/

import { mocked } from "jest-mock";
import { MatrixClient, MatrixEvent, Room } from "matrix-js-sdk/src/matrix";

import {
    VoiceBroadcastInfoState,
    VoiceBroadcastPlayback,
    VoiceBroadcastPlaybackEvent,
    VoiceBroadcastPlaybacksStore,
    VoiceBroadcastPlaybacksStoreEvent,
    VoiceBroadcastPlaybackState,
    VoiceBroadcastRecordingsStore,
} from "../../../src/voice-broadcast";
import { mkStubRoom, stubClient } from "../../test-utils";
import { mkVoiceBroadcastInfoStateEvent } from "../utils/test-utils";

describe("VoiceBroadcastPlaybacksStore", () => {
    const roomId = "!room:example.com";
    let client: MatrixClient;
    let userId: string;
    let deviceId: string;
    let room: Room;
    let infoEvent1: MatrixEvent;
    let infoEvent2: MatrixEvent;
    let playback1: VoiceBroadcastPlayback;
    let playback2: VoiceBroadcastPlayback;
    let playbacks: VoiceBroadcastPlaybacksStore;
    let onCurrentChanged: (playback: VoiceBroadcastPlayback | null) => void;

    beforeEach(() => {
        client = stubClient();
        userId = client.getUserId() || "";
        deviceId = client.getDeviceId() || "";
        mocked(client.relations).mockClear();
        mocked(client.relations).mockResolvedValue({ events: [] });

        room = mkStubRoom(roomId, "test room", client);
        mocked(client.getRoom).mockImplementation((roomId: string): Room | null => {
            if (roomId === room.roomId) {
                return room;
            }

            return null;
        });

        infoEvent1 = mkVoiceBroadcastInfoStateEvent(roomId, VoiceBroadcastInfoState.Started, userId, deviceId);
        infoEvent2 = mkVoiceBroadcastInfoStateEvent(roomId, VoiceBroadcastInfoState.Started, userId, deviceId);
        const recordings = new VoiceBroadcastRecordingsStore();
        playback1 = new VoiceBroadcastPlayback(infoEvent1, client, recordings);
        jest.spyOn(playback1, "off");
        playback2 = new VoiceBroadcastPlayback(infoEvent2, client, recordings);
        jest.spyOn(playback2, "off");

        playbacks = new VoiceBroadcastPlaybacksStore(recordings);
        jest.spyOn(playbacks, "removeAllListeners");
        onCurrentChanged = jest.fn();
        playbacks.on(VoiceBroadcastPlaybacksStoreEvent.CurrentChanged, onCurrentChanged);
    });

    afterEach(() => {
        playbacks.off(VoiceBroadcastPlaybacksStoreEvent.CurrentChanged, onCurrentChanged);
    });

    describe("when setting a current Voice Broadcast playback", () => {
        beforeEach(() => {
            playbacks.setCurrent(playback1);
        });

        it("should return it as current", () => {
            expect(playbacks.getCurrent()).toBe(playback1);
        });

        it("should return it by id", () => {
            expect(playbacks.getByInfoEvent(infoEvent1, client)).toBe(playback1);
        });

        it("should emit a CurrentChanged event", () => {
            expect(onCurrentChanged).toHaveBeenCalledWith(playback1);
        });

        describe("and setting the same again", () => {
            beforeEach(() => {
                mocked(onCurrentChanged).mockClear();
                playbacks.setCurrent(playback1);
            });

            it("should not emit a CurrentChanged event", () => {
                expect(onCurrentChanged).not.toHaveBeenCalled();
            });
        });

        describe("and setting another playback and start both", () => {
            beforeEach(() => {
                playbacks.setCurrent(playback2);
                playback1.start();
                playback2.start();
            });

            it("should set playback1 to paused", () => {
                expect(playback1.getState()).toBe(VoiceBroadcastPlaybackState.Paused);
            });

            it("should set playback2 to buffering", () => {
                // buffering because there are no chunks, yet
                expect(playback2.getState()).toBe(VoiceBroadcastPlaybackState.Buffering);
            });

            describe("and calling destroy", () => {
                beforeEach(() => {
                    playbacks.destroy();
                });

                it("should remove all listeners", () => {
                    expect(playbacks.removeAllListeners).toHaveBeenCalled();
                });

                it("should deregister the listeners on the playbacks", () => {
                    expect(playback1.off).toHaveBeenCalledWith(
                        VoiceBroadcastPlaybackEvent.StateChanged,
                        expect.any(Function),
                    );
                    expect(playback2.off).toHaveBeenCalledWith(
                        VoiceBroadcastPlaybackEvent.StateChanged,
                        expect.any(Function),
                    );
                });
            });
        });
    });

    describe("getByInfoEventId", () => {
        let returnedPlayback: VoiceBroadcastPlayback;

        describe("when retrieving a known playback", () => {
            beforeEach(() => {
                playbacks.setCurrent(playback1);
                returnedPlayback = playbacks.getByInfoEvent(infoEvent1, client);
            });

            it("should return the playback", () => {
                expect(returnedPlayback).toBe(playback1);
            });
        });

        describe("when retrieving an unknown playback", () => {
            beforeEach(() => {
                returnedPlayback = playbacks.getByInfoEvent(infoEvent1, client);
            });

            it("should return the playback", () => {
                expect(returnedPlayback.infoEvent).toBe(infoEvent1);
            });
        });
    });
});