/*
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 {
    VoiceBroadcastRecordingsStore,
    VoiceBroadcastRecordingsStoreEvent,
    VoiceBroadcastRecording,
    VoiceBroadcastInfoState,
} from "../../../src/voice-broadcast";
import { mkStubRoom, stubClient } from "../../test-utils";
import { mkVoiceBroadcastInfoStateEvent } from "../utils/test-utils";

describe("VoiceBroadcastRecordingsStore", () => {
    const roomId = "!room:example.com";
    let client: MatrixClient;
    let room: Room;
    let infoEvent: MatrixEvent;
    let otherInfoEvent: MatrixEvent;
    let recording: VoiceBroadcastRecording;
    let otherRecording: VoiceBroadcastRecording;
    let recordings: VoiceBroadcastRecordingsStore;
    let onCurrentChanged: (recording: VoiceBroadcastRecording | null) => void;

    beforeEach(() => {
        client = stubClient();
        room = mkStubRoom(roomId, "test room", client);
        mocked(client.getRoom).mockImplementation((roomId: string) => {
            if (roomId === room.roomId) {
                return room;
            }
            return null;
        });
        infoEvent = mkVoiceBroadcastInfoStateEvent(
            roomId,
            VoiceBroadcastInfoState.Started,
            client.getUserId()!,
            client.getDeviceId()!,
        );
        otherInfoEvent = mkVoiceBroadcastInfoStateEvent(
            roomId,
            VoiceBroadcastInfoState.Started,
            client.getUserId()!,
            client.getDeviceId()!,
        );
        recording = new VoiceBroadcastRecording(infoEvent, client);
        otherRecording = new VoiceBroadcastRecording(otherInfoEvent, client);
        recordings = new VoiceBroadcastRecordingsStore();
        onCurrentChanged = jest.fn();
        recordings.on(VoiceBroadcastRecordingsStoreEvent.CurrentChanged, onCurrentChanged);
    });

    afterEach(() => {
        recording.destroy();
        recordings.off(VoiceBroadcastRecordingsStoreEvent.CurrentChanged, onCurrentChanged);
    });

    it("when setting a recording without info event Id, it should raise an error", () => {
        infoEvent.event.event_id = undefined;
        expect(() => {
            recordings.setCurrent(recording);
        }).toThrow("Got broadcast info event without Id");
    });

    describe("when setting a current Voice Broadcast recording", () => {
        beforeEach(() => {
            recordings.setCurrent(recording);
        });

        it("should return it as current", () => {
            expect(recordings.hasCurrent()).toBe(true);
            expect(recordings.getCurrent()).toBe(recording);
        });

        it("should return it by id", () => {
            expect(recordings.getByInfoEvent(infoEvent, client)).toBe(recording);
        });

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

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

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

        describe("and calling clearCurrent()", () => {
            beforeEach(() => {
                recordings.clearCurrent();
            });

            it("should clear the current recording", () => {
                expect(recordings.hasCurrent()).toBe(false);
                expect(recordings.getCurrent()).toBeNull();
            });

            it("should emit a current changed event", () => {
                expect(onCurrentChanged).toHaveBeenCalledWith(null);
            });

            it("and calling it again should work", () => {
                recordings.clearCurrent();
                expect(recordings.getCurrent()).toBeNull();
            });
        });

        describe("and setting another recording and stopping the previous recording", () => {
            beforeEach(() => {
                recordings.setCurrent(otherRecording);
                recording.stop();
            });

            it("should keep the current recording", () => {
                expect(recordings.getCurrent()).toBe(otherRecording);
            });
        });

        describe("and the recording stops", () => {
            beforeEach(() => {
                recording.stop();
            });

            it("should clear the current recording", () => {
                expect(recordings.getCurrent()).toBeNull();
            });
        });
    });

    describe("getByInfoEventId", () => {
        let returnedRecording: VoiceBroadcastRecording;

        describe("when retrieving a known recording", () => {
            beforeEach(() => {
                recordings.setCurrent(recording);
                returnedRecording = recordings.getByInfoEvent(infoEvent, client);
            });

            it("should return the recording", () => {
                expect(returnedRecording).toBe(recording);
            });
        });

        describe("when retrieving an unknown recording", () => {
            beforeEach(() => {
                returnedRecording = recordings.getByInfoEvent(infoEvent, client);
            });

            it("should return the recording", () => {
                expect(returnedRecording.infoEvent).toBe(infoEvent);
            });
        });
    });
});