/*
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 {
    ClientEvent,
    EventTimelineSet,
    EventType,
    LOCAL_NOTIFICATION_SETTINGS_PREFIX,
    MatrixClient,
    MatrixEvent,
    MatrixEventEvent,
    MsgType,
    RelationType,
    Room,
    Relations,
    SyncState,
} from "matrix-js-sdk/src/matrix";
import { EncryptedFile } from "matrix-js-sdk/src/types";
import fetchMock from "fetch-mock-jest";

import { uploadFile } from "../../../src/ContentMessages";
import { createVoiceMessageContent } from "../../../src/utils/createVoiceMessageContent";
import {
    createVoiceBroadcastRecorder,
    getChunkLength,
    getMaxBroadcastLength,
    VoiceBroadcastInfoEventContent,
    VoiceBroadcastInfoEventType,
    VoiceBroadcastInfoState,
    VoiceBroadcastRecorder,
    VoiceBroadcastRecorderEvent,
    VoiceBroadcastRecording,
    VoiceBroadcastRecordingEvent,
    VoiceBroadcastRecordingState,
} from "../../../src/voice-broadcast";
import { mkEvent, mkStubRoom, stubClient } from "../../test-utils";
import dis from "../../../src/dispatcher/dispatcher";
import { VoiceRecording } from "../../../src/audio/VoiceRecording";
import { createAudioContext } from "../../../src/audio/compat";

jest.mock("../../../src/voice-broadcast/audio/VoiceBroadcastRecorder", () => ({
    ...(jest.requireActual("../../../src/voice-broadcast/audio/VoiceBroadcastRecorder") as object),
    createVoiceBroadcastRecorder: jest.fn(),
}));

// mock VoiceRecording because it contains all the audio APIs
jest.mock("../../../src/audio/VoiceRecording", () => ({
    VoiceRecording: jest.fn().mockReturnValue({
        disableMaxLength: jest.fn(),
        liveData: {
            onUpdate: jest.fn(),
        },
        off: jest.fn(),
        on: jest.fn(),
        start: jest.fn(),
        stop: jest.fn(),
        destroy: jest.fn(),
        contentType: "audio/ogg",
    }),
}));

jest.mock("../../../src/ContentMessages", () => ({
    uploadFile: jest.fn(),
}));

jest.mock("../../../src/utils/createVoiceMessageContent", () => ({
    createVoiceMessageContent: jest.fn(),
}));

jest.mock("../../../src/audio/compat", () => ({
    ...jest.requireActual("../../../src/audio/compat"),
    createAudioContext: jest.fn(),
}));

describe("VoiceBroadcastRecording", () => {
    const roomId = "!room:example.com";
    const uploadedUrl = "mxc://example.com/vb";
    const uploadedFile = { file: true } as unknown as EncryptedFile;
    const maxLength = getMaxBroadcastLength();
    let room: Room;
    let client: MatrixClient;
    let infoEvent: MatrixEvent;
    let voiceBroadcastRecording: VoiceBroadcastRecording;
    let onStateChanged: (state: VoiceBroadcastRecordingState) => void;
    let voiceBroadcastRecorder: VoiceBroadcastRecorder;
    let audioElement: HTMLAudioElement;

    const mkVoiceBroadcastInfoEvent = (content: VoiceBroadcastInfoEventContent) => {
        return mkEvent({
            event: true,
            type: VoiceBroadcastInfoEventType,
            user: client.getSafeUserId(),
            room: roomId,
            content,
        });
    };

    const setUpVoiceBroadcastRecording = () => {
        voiceBroadcastRecording = new VoiceBroadcastRecording(infoEvent, client);
        voiceBroadcastRecording.on(VoiceBroadcastRecordingEvent.StateChanged, onStateChanged);
        jest.spyOn(voiceBroadcastRecording, "destroy");
        jest.spyOn(voiceBroadcastRecording, "emit");
        jest.spyOn(voiceBroadcastRecording, "removeAllListeners");
    };

    const itShouldBeInState = (state: VoiceBroadcastRecordingState) => {
        it(`should be in state stopped ${state}`, () => {
            expect(voiceBroadcastRecording.getState()).toBe(state);
        });
    };

    const emitFirsChunkRecorded = () => {
        voiceBroadcastRecorder.emit(VoiceBroadcastRecorderEvent.ChunkRecorded, {
            buffer: new Uint8Array([1, 2, 3]),
            length: 23,
        });
    };

    const itShouldSendAnInfoEvent = (state: VoiceBroadcastInfoState, lastChunkSequence: number) => {
        it(`should send a ${state} info event`, () => {
            expect(client.sendStateEvent).toHaveBeenCalledWith(
                roomId,
                VoiceBroadcastInfoEventType,
                {
                    device_id: client.getDeviceId(),
                    state,
                    last_chunk_sequence: lastChunkSequence,
                    ["m.relates_to"]: {
                        rel_type: RelationType.Reference,
                        event_id: infoEvent.getId(),
                    },
                } as VoiceBroadcastInfoEventContent,
                client.getUserId()!,
            );
        });
    };

    const itShouldSendAVoiceMessage = (data: number[], size: number, duration: number, sequence: number) => {
        // events contain milliseconds
        duration *= 1000;

        it("should send a voice message", () => {
            expect(uploadFile).toHaveBeenCalledWith(
                client,
                roomId,
                new Blob([new Uint8Array(data)], { type: voiceBroadcastRecorder.contentType }),
            );

            expect(mocked(client.sendMessage)).toHaveBeenCalledWith(roomId, {
                body: "Voice message",
                file: {
                    file: true,
                },
                info: {
                    duration,
                    mimetype: "audio/ogg",
                    size,
                },
                ["m.relates_to"]: {
                    event_id: infoEvent.getId(),
                    rel_type: "m.reference",
                },
                msgtype: "m.audio",
                ["org.matrix.msc1767.audio"]: {
                    duration,
                    waveform: undefined,
                },
                ["org.matrix.msc1767.file"]: {
                    file: {
                        file: true,
                    },
                    mimetype: "audio/ogg",
                    name: "Voice message.ogg",
                    size,
                    url: "mxc://example.com/vb",
                },
                ["org.matrix.msc1767.text"]: "Voice message",
                ["org.matrix.msc3245.voice"]: {},
                url: "mxc://example.com/vb",
                ["io.element.voice_broadcast_chunk"]: {
                    sequence,
                },
            });
        });
    };

    const setUpUploadFileMock = () => {
        mocked(uploadFile).mockResolvedValue({
            url: uploadedUrl,
            file: uploadedFile,
        });
    };

    const mockAudioBufferSourceNode = {
        addEventListener: jest.fn(),
        connect: jest.fn(),
        start: jest.fn(),
    };
    const mockAudioContext = {
        decodeAudioData: jest.fn(),
        suspend: jest.fn(),
        resume: jest.fn(),
        createBufferSource: jest.fn().mockReturnValue(mockAudioBufferSourceNode),
        currentTime: 1337,
    };

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

            return null;
        });
        onStateChanged = jest.fn();
        voiceBroadcastRecorder = new VoiceBroadcastRecorder(new VoiceRecording(), getChunkLength());
        jest.spyOn(voiceBroadcastRecorder, "start");
        jest.spyOn(voiceBroadcastRecorder, "stop");
        jest.spyOn(voiceBroadcastRecorder, "destroy");
        mocked(createVoiceBroadcastRecorder).mockReturnValue(voiceBroadcastRecorder);

        setUpUploadFileMock();

        mocked(createVoiceMessageContent).mockImplementation(
            (
                mxc: string | undefined,
                mimetype: string,
                duration: number,
                size: number,
                file?: EncryptedFile,
                waveform?: number[],
            ) => {
                return {
                    body: "Voice message",
                    msgtype: MsgType.Audio,
                    url: mxc,
                    file,
                    info: {
                        duration,
                        mimetype,
                        size,
                    },
                    ["org.matrix.msc1767.text"]: "Voice message",
                    ["org.matrix.msc1767.file"]: {
                        url: mxc,
                        file,
                        name: "Voice message.ogg",
                        mimetype,
                        size,
                    },
                    ["org.matrix.msc1767.audio"]: {
                        duration,
                        // https://github.com/matrix-org/matrix-doc/pull/3246
                        waveform,
                    },
                    ["org.matrix.msc3245.voice"]: {}, // No content, this is a rendering hint
                };
            },
        );

        audioElement = {
            play: jest.fn(),
        } as any as HTMLAudioElement;

        jest.spyOn(document, "querySelector").mockImplementation((selector: string) => {
            if (selector === "audio#errorAudio") {
                return audioElement;
            }

            return null;
        });

        mocked(createAudioContext).mockReturnValue(mockAudioContext as unknown as AudioContext);
    });

    afterEach(() => {
        voiceBroadcastRecording?.off(VoiceBroadcastRecordingEvent.StateChanged, onStateChanged);
    });

    describe("when there is an info event without id", () => {
        beforeEach(() => {
            infoEvent = mkVoiceBroadcastInfoEvent({
                device_id: client.getDeviceId()!,
                state: VoiceBroadcastInfoState.Started,
            });
            jest.spyOn(infoEvent, "getId").mockReturnValue(undefined);
        });

        it("should raise an error when creating a broadcast", () => {
            expect(() => {
                setUpVoiceBroadcastRecording();
            }).toThrow("Cannot create broadcast for info event without Id.");
        });
    });

    describe("when there is an info event without room", () => {
        beforeEach(() => {
            infoEvent = mkVoiceBroadcastInfoEvent({
                device_id: client.getDeviceId()!,
                state: VoiceBroadcastInfoState.Started,
            });
            jest.spyOn(infoEvent, "getRoomId").mockReturnValue(undefined);
        });

        it("should raise an error when creating a broadcast", () => {
            expect(() => {
                setUpVoiceBroadcastRecording();
            }).toThrow(`Cannot create broadcast for unknown room (info event ${infoEvent.getId()})`);
        });
    });

    describe("when created for a Voice Broadcast Info without relations", () => {
        beforeEach(() => {
            infoEvent = mkVoiceBroadcastInfoEvent({
                device_id: client.getDeviceId()!,
                state: VoiceBroadcastInfoState.Started,
            });
            setUpVoiceBroadcastRecording();
        });

        it("should be in Started state", () => {
            expect(voiceBroadcastRecording.getState()).toBe(VoiceBroadcastInfoState.Started);
        });

        describe("and calling stop", () => {
            beforeEach(() => {
                voiceBroadcastRecording.stop();
            });

            itShouldSendAnInfoEvent(VoiceBroadcastInfoState.Stopped, 0);
            itShouldBeInState(VoiceBroadcastInfoState.Stopped);

            it("should emit a stopped state changed event", () => {
                expect(onStateChanged).toHaveBeenCalledWith(VoiceBroadcastInfoState.Stopped);
            });
        });

        describe("and calling start", () => {
            beforeEach(async () => {
                await voiceBroadcastRecording.start();
            });

            it("should start the recorder", () => {
                expect(voiceBroadcastRecorder.start).toHaveBeenCalled();
            });

            describe("and the info event is redacted", () => {
                beforeEach(() => {
                    infoEvent.emit(
                        MatrixEventEvent.BeforeRedaction,
                        infoEvent,
                        mkEvent({
                            event: true,
                            type: EventType.RoomRedaction,
                            user: client.getSafeUserId(),
                            content: {},
                        }),
                    );
                });

                itShouldBeInState(VoiceBroadcastInfoState.Stopped);

                it("should destroy the recording", () => {
                    expect(voiceBroadcastRecording.destroy).toHaveBeenCalled();
                });
            });

            describe("and receiving a call action", () => {
                beforeEach(() => {
                    dis.dispatch(
                        {
                            action: "call_state",
                        },
                        true,
                    );
                });

                itShouldBeInState(VoiceBroadcastInfoState.Paused);
            });

            describe("and a chunk time update occurs", () => {
                beforeEach(() => {
                    voiceBroadcastRecorder.emit(VoiceBroadcastRecorderEvent.CurrentChunkLengthUpdated, 10);
                });

                it("should update time left", () => {
                    expect(voiceBroadcastRecording.getTimeLeft()).toBe(maxLength - 10);
                    expect(voiceBroadcastRecording.emit).toHaveBeenCalledWith(
                        VoiceBroadcastRecordingEvent.TimeLeftChanged,
                        maxLength - 10,
                    );
                });

                describe("and a chunk time update occurs, that would increase time left", () => {
                    beforeEach(() => {
                        mocked(voiceBroadcastRecording.emit).mockClear();
                        voiceBroadcastRecorder.emit(VoiceBroadcastRecorderEvent.CurrentChunkLengthUpdated, 5);
                    });

                    it("should not change time left", () => {
                        expect(voiceBroadcastRecording.getTimeLeft()).toBe(maxLength - 10);
                        expect(voiceBroadcastRecording.emit).not.toHaveBeenCalled();
                    });
                });
            });

            describe("and a chunk has been recorded", () => {
                beforeEach(async () => {
                    emitFirsChunkRecorded();
                });

                itShouldSendAVoiceMessage([1, 2, 3], 3, 23, 1);

                describe("and another chunk has been recorded, that exceeds the max time", () => {
                    beforeEach(() => {
                        mocked(voiceBroadcastRecorder.stop).mockResolvedValue({
                            buffer: new Uint8Array([23, 24, 25]),
                            length: getMaxBroadcastLength(),
                        });
                        voiceBroadcastRecorder.emit(
                            VoiceBroadcastRecorderEvent.CurrentChunkLengthUpdated,
                            getMaxBroadcastLength(),
                        );
                    });

                    itShouldBeInState(VoiceBroadcastInfoState.Stopped);
                    itShouldSendAVoiceMessage([23, 24, 25], 3, getMaxBroadcastLength(), 2);
                    itShouldSendAnInfoEvent(VoiceBroadcastInfoState.Stopped, 2);
                });
            });

            describe("and calling stop", () => {
                beforeEach(async () => {
                    mocked(voiceBroadcastRecorder.stop).mockResolvedValue({
                        buffer: new Uint8Array([4, 5, 6]),
                        length: 42,
                    });
                    await voiceBroadcastRecording.stop();
                });

                itShouldSendAVoiceMessage([4, 5, 6], 3, 42, 1);
                itShouldSendAnInfoEvent(VoiceBroadcastInfoState.Stopped, 1);
            });

            describe.each([
                ["pause", async () => voiceBroadcastRecording.pause()],
                ["toggle", async () => voiceBroadcastRecording.toggle()],
            ])("and calling %s", (_case: string, action: Function) => {
                beforeEach(async () => {
                    await action();
                });

                itShouldBeInState(VoiceBroadcastInfoState.Paused);
                itShouldSendAnInfoEvent(VoiceBroadcastInfoState.Paused, 0);

                it("should stop the recorder", () => {
                    expect(mocked(voiceBroadcastRecorder.stop)).toHaveBeenCalled();
                });

                it("should emit a paused state changed event", () => {
                    expect(onStateChanged).toHaveBeenCalledWith(VoiceBroadcastInfoState.Paused);
                });
            });

            describe("and there is no connection", () => {
                beforeEach(() => {
                    mocked(client.sendStateEvent).mockImplementation(() => {
                        throw new Error();
                    });
                });

                describe.each([
                    ["pause", async () => voiceBroadcastRecording.pause()],
                    ["toggle", async () => voiceBroadcastRecording.toggle()],
                ])("and calling %s", (_case: string, action: Function) => {
                    beforeEach(async () => {
                        await action();
                    });

                    itShouldBeInState("connection_error");

                    describe("and the connection is back", () => {
                        beforeEach(() => {
                            mocked(client.sendStateEvent).mockResolvedValue({ event_id: "e1" });
                            client.emit(ClientEvent.Sync, SyncState.Catchup, SyncState.Error);
                        });

                        itShouldBeInState(VoiceBroadcastInfoState.Paused);
                    });
                });
            });

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

                it("should stop the recorder and remove all listeners", () => {
                    expect(mocked(voiceBroadcastRecorder.stop)).toHaveBeenCalled();
                    expect(mocked(voiceBroadcastRecorder.destroy)).toHaveBeenCalled();
                    expect(mocked(voiceBroadcastRecording.removeAllListeners)).toHaveBeenCalled();
                });
            });

            describe("and a chunk has been recorded and the upload fails", () => {
                beforeEach(() => {
                    mocked(uploadFile).mockRejectedValue("Error");
                    emitFirsChunkRecorded();
                });

                itShouldBeInState("connection_error");

                describe("and the connection is back", () => {
                    beforeEach(() => {
                        setUpUploadFileMock();
                        client.emit(ClientEvent.Sync, SyncState.Catchup, SyncState.Error);
                    });

                    itShouldBeInState(VoiceBroadcastInfoState.Paused);
                    itShouldSendAVoiceMessage([1, 2, 3], 3, 23, 1);
                });
            });

            describe("and audible notifications are disabled", () => {
                beforeEach(() => {
                    const notificationSettings = mkEvent({
                        event: true,
                        type: `${LOCAL_NOTIFICATION_SETTINGS_PREFIX.name}.${client.getDeviceId()}`,
                        user: client.getSafeUserId(),
                        content: {
                            is_silenced: true,
                        },
                    });
                    mocked(client.getAccountData).mockReturnValue(notificationSettings);
                });

                describe("and a chunk has been recorded and sending the voice message fails", () => {
                    beforeEach(() => {
                        mocked(client.sendMessage).mockRejectedValue("Error");
                        emitFirsChunkRecorded();
                    });

                    itShouldBeInState("connection_error");

                    it("should not play a notification", () => {
                        expect(audioElement.play).not.toHaveBeenCalled();
                    });
                });
            });

            describe("and a chunk has been recorded and sending the voice message fails", () => {
                beforeEach(() => {
                    mocked(client.sendMessage).mockRejectedValue("Error");
                    emitFirsChunkRecorded();
                    fetchMock.get("media/error.mp3", 200);
                });

                itShouldBeInState("connection_error");

                it("should play a notification", () => {
                    expect(mockAudioBufferSourceNode.start).toHaveBeenCalled();
                });

                describe("and the connection is back", () => {
                    beforeEach(() => {
                        mocked(client.sendMessage).mockClear();
                        mocked(client.sendMessage).mockResolvedValue({ event_id: "e23" });
                        client.emit(ClientEvent.Sync, SyncState.Catchup, SyncState.Error);
                    });

                    itShouldBeInState(VoiceBroadcastInfoState.Paused);
                    itShouldSendAVoiceMessage([1, 2, 3], 3, 23, 1);
                });
            });
        });

        describe("and it is in paused state", () => {
            beforeEach(async () => {
                await voiceBroadcastRecording.pause();
            });

            describe.each([
                ["resume", async () => voiceBroadcastRecording.resume()],
                ["toggle", async () => voiceBroadcastRecording.toggle()],
            ])("and calling %s", (_case: string, action: Function) => {
                beforeEach(async () => {
                    await action();
                });

                itShouldBeInState(VoiceBroadcastInfoState.Resumed);
                itShouldSendAnInfoEvent(VoiceBroadcastInfoState.Resumed, 0);

                it("should start the recorder", () => {
                    expect(mocked(voiceBroadcastRecorder.start)).toHaveBeenCalled();
                });

                it(`should emit a ${VoiceBroadcastInfoState.Resumed} state changed event`, () => {
                    expect(onStateChanged).toHaveBeenCalledWith(VoiceBroadcastInfoState.Resumed);
                });
            });
        });
    });

    describe("when created for a Voice Broadcast Info with a Stopped relation", () => {
        beforeEach(() => {
            infoEvent = mkVoiceBroadcastInfoEvent({
                device_id: client.getDeviceId()!,
                state: VoiceBroadcastInfoState.Started,
                chunk_length: 120,
            });

            const relationsContainer = {
                getRelations: jest.fn(),
            } as unknown as Relations;
            mocked(relationsContainer.getRelations).mockReturnValue([
                mkVoiceBroadcastInfoEvent({
                    device_id: client.getDeviceId()!,
                    state: VoiceBroadcastInfoState.Stopped,
                    ["m.relates_to"]: {
                        rel_type: RelationType.Reference,
                        event_id: infoEvent.getId()!,
                    },
                }),
            ]);

            const timelineSet = {
                relations: {
                    getChildEventsForEvent: jest
                        .fn()
                        .mockImplementation(
                            (eventId: string, relationType: RelationType | string, eventType: EventType | string) => {
                                if (
                                    eventId === infoEvent.getId() &&
                                    relationType === RelationType.Reference &&
                                    eventType === VoiceBroadcastInfoEventType
                                ) {
                                    return relationsContainer;
                                }
                            },
                        ),
                },
            } as unknown as EventTimelineSet;
            mocked(room.getUnfilteredTimelineSet).mockReturnValue(timelineSet);

            setUpVoiceBroadcastRecording();
        });

        it("should be in Stopped state", () => {
            expect(voiceBroadcastRecording.getState()).toBe(VoiceBroadcastInfoState.Stopped);
        });
    });
});