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

import type { RoomMember } from "matrix-js-sdk/src/matrix";
import type { ClientWidgetApi } from "matrix-widget-api";
import {
    stubClient,
    mkRoomMember,
    wrapInMatrixClientContext,
    useMockedCalls,
    MockedCall,
    setupAsyncStoreWithClient,
    useMockMediaDevices,
} from "../../../test-utils";
import { MatrixClientPeg } from "../../../../src/MatrixClientPeg";
import { CallView as _CallView } from "../../../../src/components/views/voip/CallView";
import { WidgetMessagingStore } from "../../../../src/stores/widgets/WidgetMessagingStore";
import { CallStore } from "../../../../src/stores/CallStore";
import { Call, ConnectionState } from "../../../../src/models/Call";

const CallView = wrapInMatrixClientContext(_CallView);

describe("CallView", () => {
    useMockedCalls();
    jest.spyOn(HTMLMediaElement.prototype, "play").mockImplementation(async () => {});

    let client: Mocked<MatrixClient>;
    let room: Room;
    let alice: RoomMember;

    beforeEach(() => {
        useMockMediaDevices();

        stubClient();
        client = mocked(MatrixClientPeg.safeGet());

        room = new Room("!1:example.org", client, "@alice:example.org", {
            pendingEventOrdering: PendingEventOrdering.Detached,
        });
        alice = mkRoomMember(room.roomId, "@alice:example.org");
        jest.spyOn(room, "getMember").mockImplementation((userId) => (userId === alice.userId ? alice : null));

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

        setupAsyncStoreWithClient(CallStore.instance, client);
        setupAsyncStoreWithClient(WidgetMessagingStore.instance, client);
    });

    afterEach(() => {
        client.reEmitter.stopReEmitting(room, [RoomStateEvent.Events]);
    });

    const renderView = async (skipLobby = false): Promise<void> => {
        render(<CallView room={room} resizing={false} waitForCall={false} skipLobby={skipLobby} />);
        await act(() => Promise.resolve()); // Let effects settle
    };

    describe("with an existing call", () => {
        let call: MockedCall;
        let widget: Widget;

        beforeEach(() => {
            MockedCall.create(room, "1");
            const maybeCall = CallStore.instance.getCall(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(() => {
            cleanup(); // Unmount before we do any cleanup that might update the component
            call.destroy();
            WidgetMessagingStore.instance.stopMessaging(widget, room.roomId);
        });

        it("calls clean on mount", async () => {
            const cleanSpy = jest.spyOn(call, "clean");
            await renderView();
            expect(cleanSpy).toHaveBeenCalled();
        });

        /**
         * TODO: Fix I do not understand this test
         */
        it.skip("tracks participants", async () => {
            const bob = mkRoomMember(room.roomId, "@bob:example.org");
            const carol = mkRoomMember(room.roomId, "@carol:example.org");

            const expectAvatars = (userIds: string[]) => {
                const avatars = screen.queryAllByRole("button", { name: "Profile picture" });
                expect(userIds.length).toBe(avatars.length);

                for (const [userId, avatar] of zip(userIds, avatars)) {
                    fireEvent.focus(avatar!);
                    screen.getAllByRole("tooltip", { name: userId });
                }
            };

            await renderView();
            expect(screen.queryByLabelText(/joined/)).toBe(null);
            expectAvatars([]);

            act(() => {
                call.participants = new Map([[alice, new Set(["a"])]]);
            });
            screen.getByText("1 person joined");
            expectAvatars([alice.userId]);

            act(() => {
                call.participants = new Map([
                    [alice, new Set(["a"])],
                    [bob, new Set(["b1", "b2"])],
                    [carol, new Set(["c"])],
                ]);
            });
            screen.getByText("4 people joined");
            expectAvatars([alice.userId, bob.userId, bob.userId, carol.userId]);

            act(() => {
                call.participants = new Map();
            });
            expect(screen.queryByLabelText(/joined/)).toBe(null);
            expectAvatars([]);
        });

        it("automatically connects to the call when skipLobby is true", async () => {
            const connectSpy = jest.spyOn(call, "start");
            await renderView(true);
            await waitFor(() => expect(connectSpy).toHaveBeenCalled(), { interval: 1 });
        });
    });

    describe("without an existing call", () => {
        it("creates and connects to a new call when the join button is pressed", async () => {
            expect(Call.get(room)).toBeNull();
            await renderView(true);
            await waitFor(() => expect(CallStore.instance.getCall(room.roomId)).not.toBeNull());
            const call = CallStore.instance.getCall(room.roomId)!;

            const widget = new Widget(call.widget);
            WidgetMessagingStore.instance.storeMessaging(widget, room.roomId, {
                stop: () => {},
            } as unknown as ClientWidgetApi);
            await waitFor(() => expect(call.connectionState).toBe(ConnectionState.Connected));

            cleanup(); // Unmount before we do any cleanup that might update the component
            call.destroy();
            WidgetMessagingStore.instance.stopMessaging(widget, room.roomId);
        });
    });
});