/*
Copyright 2022 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 { mocked } from "jest-mock";
import { EventType, MatrixClient, MatrixEvent, Room, RoomStateEvent } from "matrix-js-sdk/src/matrix";

import {
    startNewVoiceBroadcastRecording,
    VoiceBroadcastInfoEventType,
    VoiceBroadcastInfoState,
    VoiceBroadcastRecordingsStore,
    VoiceBroadcastRecording,
} from "../../../src/voice-broadcast";
import { mkEvent, stubClient } from "../../test-utils";

jest.mock("../../../src/voice-broadcast/models/VoiceBroadcastRecording", () => ({
    VoiceBroadcastRecording: jest.fn(),
}));

describe("startNewVoiceBroadcastRecording", () => {
    const roomId = "!room:example.com";
    let client: MatrixClient;
    let recordingsStore: VoiceBroadcastRecordingsStore;
    let room: Room;
    let roomOnStateEventsCallbackRegistered: Promise<void>;
    let roomOnStateEventsCallbackRegisteredResolver: Function;
    let roomOnStateEventsCallback: () => void;
    let infoEvent: MatrixEvent;
    let otherEvent: MatrixEvent;
    let stateEvent: MatrixEvent;

    beforeEach(() => {
        roomOnStateEventsCallbackRegistered = new Promise((resolve) => {
            roomOnStateEventsCallbackRegisteredResolver = resolve;
        });

        room = {
            currentState: {
                getStateEvents: jest.fn().mockImplementation((type, userId) => {
                    if (type === VoiceBroadcastInfoEventType && userId === client.getUserId()) {
                        return stateEvent;
                    }
                }),
            },
            on: jest.fn().mockImplementation((eventType, callback) => {
                if (eventType === RoomStateEvent.Events) {
                    roomOnStateEventsCallback = callback;
                    roomOnStateEventsCallbackRegisteredResolver();
                }
            }),
            off: jest.fn(),
        } as unknown as Room;

        client = stubClient();
        mocked(client.getRoom).mockImplementation((getRoomId: string) => {
            if (getRoomId === roomId) {
                return room;
            }
        });
        mocked(client.sendStateEvent).mockImplementation((
            sendRoomId: string,
            eventType: string,
            _content: any,
            _stateKey: string,
        ) => {
            if (sendRoomId === roomId && eventType === VoiceBroadcastInfoEventType) {
                return Promise.resolve({ event_id: infoEvent.getId() });
            }
        });

        recordingsStore = {
            setCurrent: jest.fn(),
        } as unknown as VoiceBroadcastRecordingsStore;

        infoEvent = mkEvent({
            event: true,
            type: VoiceBroadcastInfoEventType,
            content: {
                state: VoiceBroadcastInfoState.Started,
            },
            user: client.getUserId(),
            room: roomId,
        });
        otherEvent = mkEvent({
            event: true,
            type: EventType.RoomMember,
            content: {},
            user: client.getUserId(),
            room: roomId,
        });

        mocked(VoiceBroadcastRecording).mockImplementation((
            infoEvent: MatrixEvent,
            client: MatrixClient,
        ) => {
            return {
                infoEvent,
                client,
            } as unknown as VoiceBroadcastRecording;
        });
    });

    it("should create a new Voice Broadcast", (done) => {
        let ok = false;

        startNewVoiceBroadcastRecording(roomId, client, recordingsStore).then((recording) => {
            expect(ok).toBe(true);
            expect(mocked(room.off)).toHaveBeenCalledWith(RoomStateEvent.Events, roomOnStateEventsCallback);
            expect(recording.infoEvent).toBe(infoEvent);
            done();
        });

        roomOnStateEventsCallbackRegistered.then(() => {
            // no state event, yet
            roomOnStateEventsCallback();

            // other state event
            stateEvent = otherEvent;
            roomOnStateEventsCallback();

            // the expected Voice Broadcast Info event
            stateEvent = infoEvent;
            ok = true;
            roomOnStateEventsCallback();
        });
    });
});