/*
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 React from "react";
import { render, screen, act, cleanup, fireEvent, waitFor } from "@testing-library/react";
import "@testing-library/jest-dom";
import { mocked, Mocked } from "jest-mock";
import { Room } from "matrix-js-sdk/src/models/room";
import { MatrixClient, PendingEventOrdering } from "matrix-js-sdk/src/client";
import { RoomStateEvent } from "matrix-js-sdk/src/models/room-state";
import { ClientWidgetApi, Widget } from "matrix-widget-api";

import type { RoomMember } from "matrix-js-sdk/src/models/room-member";
import {
    useMockedCalls,
    MockedCall,
    stubClient,
    mkRoomMember,
    setupAsyncStoreWithClient,
    resetAsyncStoreWithClient,
    wrapInMatrixClientContext,
} from "../../../test-utils";
import defaultDispatcher from "../../../../src/dispatcher/dispatcher";
import { Action } from "../../../../src/dispatcher/actions";
import { CallEvent as UnwrappedCallEvent } from "../../../../src/components/views/messages/CallEvent";
import { MatrixClientPeg } from "../../../../src/MatrixClientPeg";
import { CallStore } from "../../../../src/stores/CallStore";
import { WidgetMessagingStore } from "../../../../src/stores/widgets/WidgetMessagingStore";
import { ConnectionState } from "../../../../src/models/Call";

const CallEvent = wrapInMatrixClientContext(UnwrappedCallEvent);

describe("CallEvent", () => {
    useMockedCalls();
    Object.defineProperty(navigator, "mediaDevices", { value: { enumerateDevices: () => [] } });
    jest.spyOn(HTMLMediaElement.prototype, "play").mockImplementation(async () => {});

    let client: Mocked<MatrixClient>;
    let room: Room;
    let alice: RoomMember;
    let bob: RoomMember;
    let call: MockedCall;
    let widget: Widget;

    beforeEach(async () => {
        jest.useFakeTimers();
        jest.setSystemTime(0);

        stubClient();
        client = mocked(MatrixClientPeg.get());
        client.getUserId.mockReturnValue("@alice:example.org");

        room = new Room("!1:example.org", client, "@alice:example.org", {
            pendingEventOrdering: PendingEventOrdering.Detached,
        });

        alice = mkRoomMember(room.roomId, "@alice:example.org");
        bob = mkRoomMember(room.roomId, "@bob:example.org");
        jest.spyOn(room, "getMember").mockImplementation(
            userId => [alice, bob].find(member => member.userId === userId) ?? null,
        );

        client.getRoom.mockImplementation(roomId => roomId === room.roomId ? room : null);
        client.getRooms.mockReturnValue([room]);
        client.reEmitter.reEmit(room, [RoomStateEvent.Events]);

        await Promise.all([CallStore.instance, WidgetMessagingStore.instance].map(
            store => setupAsyncStoreWithClient(store, client),
        ));

        MockedCall.create(room, "1");
        const maybeCall = CallStore.instance.get(room.roomId);
        if (!(maybeCall instanceof MockedCall)) throw new Error("Failed to create call");
        call = maybeCall;

        widget = new Widget(call.widget);
        WidgetMessagingStore.instance.storeMessaging(widget, room.roomId, {
            stop: () => {},
        } as unknown as ClientWidgetApi);
    });

    afterEach(async () => {
        cleanup(); // Unmount before we do any cleanup that might update the component
        call.destroy();
        WidgetMessagingStore.instance.stopMessaging(widget, room.roomId);
        await Promise.all([CallStore.instance, WidgetMessagingStore.instance].map(resetAsyncStoreWithClient));
        client.reEmitter.stopReEmitting(room, [RoomStateEvent.Events]);
        jest.restoreAllMocks();
    });

    const renderEvent = () => { render(<CallEvent mxEvent={call.event} />); };

    it("shows a message and duration if the call was ended", () => {
        jest.advanceTimersByTime(90000);
        call.destroy();
        renderEvent();

        screen.getByText("Video call ended");
        screen.getByText("1m 30s");
    });

    it("shows placeholder info if the call isn't loaded yet", () => {
        jest.spyOn(CallStore.instance, "get").mockReturnValue(null);
        jest.advanceTimersByTime(90000);
        renderEvent();

        screen.getByText("@alice:example.org started a video call");
        expect(screen.getByRole("button", { name: "Join" })).toHaveAttribute("aria-disabled", "true");
    });

    it("shows call details and connection controls if the call is loaded", async () => {
        jest.advanceTimersByTime(90000);
        call.participants = new Set([alice, bob]);
        renderEvent();

        screen.getByText("@alice:example.org started a video call");
        screen.getByLabelText("2 participants");
        screen.getByText("1m 30s");

        // Test that the join button works
        const dispatcherSpy = jest.fn();
        const dispatcherRef = defaultDispatcher.register(dispatcherSpy);
        fireEvent.click(screen.getByRole("button", { name: "Join" }));
        await waitFor(() => expect(dispatcherSpy).toHaveBeenCalledWith({
            action: Action.ViewRoom,
            room_id: room.roomId,
            view_call: true,
        }));
        defaultDispatcher.unregister(dispatcherRef);
        await act(() => call.connect());

        // Test that the leave button works
        fireEvent.click(screen.getByRole("button", { name: "Leave" }));
        await waitFor(() => screen.getByRole("button", { name: "Join" }));
        expect(call.connectionState).toBe(ConnectionState.Disconnected);
    });
});
