/*
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, { createRef, RefObject } from "react";
import { mocked, MockedObject } from "jest-mock";
import {
    ClientEvent,
    MatrixClient,
    Room,
    RoomEvent,
    EventType,
    JoinRule,
    MatrixError,
    RoomStateEvent,
    MatrixEvent,
    SearchResult,
    IEvent,
} from "matrix-js-sdk/src/matrix";
import { KnownMembership } from "matrix-js-sdk/src/types";
import { fireEvent, render, screen, RenderResult, waitForElementToBeRemoved, waitFor } from "@testing-library/react";
import userEvent from "@testing-library/user-event";

import {
    stubClient,
    mockPlatformPeg,
    unmockPlatformPeg,
    wrapInMatrixClientContext,
    flushPromises,
    mkEvent,
    setupAsyncStoreWithClient,
    filterConsole,
    mkRoomMemberJoinEvent,
    mkThirdPartyInviteEvent,
    emitPromise,
    createTestClient,
    untilDispatch,
} from "../../test-utils";
import { MatrixClientPeg } from "../../../src/MatrixClientPeg";
import { Action } from "../../../src/dispatcher/actions";
import dis, { defaultDispatcher } from "../../../src/dispatcher/dispatcher";
import { ViewRoomPayload } from "../../../src/dispatcher/payloads/ViewRoomPayload";
import { RoomView as _RoomView } from "../../../src/components/structures/RoomView";
import ResizeNotifier from "../../../src/utils/ResizeNotifier";
import SettingsStore from "../../../src/settings/SettingsStore";
import { SettingLevel } from "../../../src/settings/SettingLevel";
import DMRoomMap from "../../../src/utils/DMRoomMap";
import { NotificationState } from "../../../src/stores/notifications/NotificationState";
import { RightPanelPhases } from "../../../src/stores/right-panel/RightPanelStorePhases";
import { LocalRoom, LocalRoomState } from "../../../src/models/LocalRoom";
import { DirectoryMember } from "../../../src/utils/direct-messages";
import { createDmLocalRoom } from "../../../src/utils/dm/createDmLocalRoom";
import { UPDATE_EVENT } from "../../../src/stores/AsyncStore";
import { SDKContext, SdkContextClass } from "../../../src/contexts/SDKContext";
import VoipUserMapper from "../../../src/VoipUserMapper";
import WidgetUtils from "../../../src/utils/WidgetUtils";
import { WidgetType } from "../../../src/widgets/WidgetType";
import WidgetStore from "../../../src/stores/WidgetStore";
import { ViewRoomErrorPayload } from "../../../src/dispatcher/payloads/ViewRoomErrorPayload";
import { SearchScope } from "../../../src/Searching";
import { MEGOLM_ENCRYPTION_ALGORITHM } from "../../../src/utils/crypto";

const RoomView = wrapInMatrixClientContext(_RoomView);

describe("RoomView", () => {
    let cli: MockedObject<MatrixClient>;
    let room: Room;
    let rooms: Map<string, Room>;
    let roomCount = 0;
    let stores: SdkContextClass;

    // mute some noise
    filterConsole("RVS update", "does not have an m.room.create event", "Current version: 1", "Version capability");

    beforeEach(() => {
        mockPlatformPeg({ reload: () => {} });
        stubClient();
        cli = mocked(MatrixClientPeg.safeGet());

        room = new Room(`!${roomCount++}:example.org`, cli, "@alice:example.org");
        jest.spyOn(room, "findPredecessor");
        room.getPendingEvents = () => [];
        rooms = new Map();
        rooms.set(room.roomId, room);
        cli.getRoom.mockImplementation((roomId: string | undefined) => rooms.get(roomId || "") || null);
        // Re-emit certain events on the mocked client
        room.on(RoomEvent.Timeline, (...args) => cli.emit(RoomEvent.Timeline, ...args));
        room.on(RoomEvent.TimelineReset, (...args) => cli.emit(RoomEvent.TimelineReset, ...args));

        DMRoomMap.makeShared(cli);
        stores = new SdkContextClass();
        stores.client = cli;
        stores.rightPanelStore.useUnitTestClient(cli);

        jest.spyOn(VoipUserMapper.sharedInstance(), "getVirtualRoomForRoom").mockResolvedValue(undefined);
    });

    afterEach(() => {
        unmockPlatformPeg();
        jest.clearAllMocks();
    });

    const mountRoomView = async (ref?: RefObject<_RoomView>): Promise<RenderResult> => {
        if (stores.roomViewStore.getRoomId() !== room.roomId) {
            const switchedRoom = new Promise<void>((resolve) => {
                const subFn = () => {
                    if (stores.roomViewStore.getRoomId()) {
                        stores.roomViewStore.off(UPDATE_EVENT, subFn);
                        resolve();
                    }
                };
                stores.roomViewStore.on(UPDATE_EVENT, subFn);
            });

            defaultDispatcher.dispatch<ViewRoomPayload>({
                action: Action.ViewRoom,
                room_id: room.roomId,
                metricsTrigger: undefined,
            });

            await switchedRoom;
        }

        const roomView = render(
            <SDKContext.Provider value={stores}>
                <RoomView
                    // threepidInvite should be optional on RoomView props
                    // it is treated as optional in RoomView
                    threepidInvite={undefined as any}
                    resizeNotifier={new ResizeNotifier()}
                    forceTimeline={false}
                    wrappedRef={ref as any}
                />
            </SDKContext.Provider>,
        );
        await flushPromises();
        return roomView;
    };

    const renderRoomView = async (switchRoom = true): Promise<ReturnType<typeof render>> => {
        if (switchRoom && stores.roomViewStore.getRoomId() !== room.roomId) {
            const switchedRoom = new Promise<void>((resolve) => {
                const subFn = () => {
                    if (stores.roomViewStore.getRoomId()) {
                        stores.roomViewStore.off(UPDATE_EVENT, subFn);
                        resolve();
                    }
                };
                stores.roomViewStore.on(UPDATE_EVENT, subFn);
            });

            defaultDispatcher.dispatch<ViewRoomPayload>({
                action: Action.ViewRoom,
                room_id: room.roomId,
                metricsTrigger: undefined,
            });

            await switchedRoom;
        }

        const roomView = render(
            <SDKContext.Provider value={stores}>
                <RoomView
                    // threepidInvite should be optional on RoomView props
                    // it is treated as optional in RoomView
                    threepidInvite={undefined as any}
                    resizeNotifier={new ResizeNotifier()}
                    forceTimeline={false}
                    onRegistered={jest.fn()}
                />
            </SDKContext.Provider>,
        );
        await flushPromises();
        return roomView;
    };
    const getRoomViewInstance = async (): Promise<_RoomView> => {
        const ref = createRef<_RoomView>();
        await mountRoomView(ref);
        return ref.current!;
    };

    it("when there is no room predecessor, getHiddenHighlightCount should return 0", async () => {
        const instance = await getRoomViewInstance();
        expect(instance.getHiddenHighlightCount()).toBe(0);
    });

    describe("when there is an old room", () => {
        let instance: _RoomView;
        let oldRoom: Room;

        beforeEach(async () => {
            instance = await getRoomViewInstance();
            oldRoom = new Room("!old:example.com", cli, cli.getSafeUserId());
            rooms.set(oldRoom.roomId, oldRoom);
            jest.spyOn(room, "findPredecessor").mockReturnValue({ roomId: oldRoom.roomId });
        });

        it("and it has 0 unreads, getHiddenHighlightCount should return 0", async () => {
            jest.spyOn(oldRoom, "getUnreadNotificationCount").mockReturnValue(0);
            expect(instance.getHiddenHighlightCount()).toBe(0);
            // assert that msc3946ProcessDynamicPredecessor is false by default
            expect(room.findPredecessor).toHaveBeenCalledWith(false);
        });

        it("and it has 23 unreads, getHiddenHighlightCount should return 23", async () => {
            jest.spyOn(oldRoom, "getUnreadNotificationCount").mockReturnValue(23);
            expect(instance.getHiddenHighlightCount()).toBe(23);
        });

        describe("and feature_dynamic_room_predecessors is enabled", () => {
            beforeEach(() => {
                instance.setState({ msc3946ProcessDynamicPredecessor: true });
            });

            afterEach(() => {
                instance.setState({ msc3946ProcessDynamicPredecessor: false });
            });

            it("should pass the setting to findPredecessor", async () => {
                expect(instance.getHiddenHighlightCount()).toBe(0);
                expect(room.findPredecessor).toHaveBeenCalledWith(true);
            });
        });
    });

    it("updates url preview visibility on encryption state change", async () => {
        room.getMyMembership = jest.fn().mockReturnValue(KnownMembership.Join);
        // we should be starting unencrypted
        expect(cli.isCryptoEnabled()).toEqual(false);
        expect(cli.isRoomEncrypted(room.roomId)).toEqual(false);

        const roomViewInstance = await getRoomViewInstance();

        // in a default (non-encrypted room, it should start out with url previews enabled)
        // This is a white-box test in that we're asserting things about the state, which
        // is not ideal, but asserting that a URL preview just isn't there could risk the
        // test being invalid because the previews just hasn't rendered yet. This feels
        // like the safest way I think?
        // This also relies on the default settings being URL previews on normally and
        // off for e2e rooms because 1) it's probably useful to assert this and
        // 2) SettingsStore is a static class and so very hard to mock out.
        expect(roomViewInstance.state.showUrlPreview).toBe(true);

        // now enable encryption
        cli.isCryptoEnabled.mockReturnValue(true);
        cli.isRoomEncrypted.mockReturnValue(true);

        // and fake an encryption event into the room to prompt it to re-check
        room.addLiveEvents([
            new MatrixEvent({
                type: "m.room.encryption",
                sender: cli.getUserId()!,
                content: {},
                event_id: "someid",
                room_id: room.roomId,
            }),
        ]);

        // URL previews should now be disabled
        expect(roomViewInstance.state.showUrlPreview).toBe(false);
    });

    it("updates live timeline when a timeline reset happens", async () => {
        const roomViewInstance = await getRoomViewInstance();
        const oldTimeline = roomViewInstance.state.liveTimeline;

        room.getUnfilteredTimelineSet().resetLiveTimeline();
        expect(roomViewInstance.state.liveTimeline).not.toEqual(oldTimeline);
    });

    describe("with virtual rooms", () => {
        it("checks for a virtual room on initial load", async () => {
            const { container } = await renderRoomView();
            expect(VoipUserMapper.sharedInstance().getVirtualRoomForRoom).toHaveBeenCalledWith(room.roomId);

            // quick check that rendered without error
            expect(container.querySelector(".mx_ErrorBoundary")).toBeFalsy();
        });

        it("checks for a virtual room on room event", async () => {
            await renderRoomView();
            expect(VoipUserMapper.sharedInstance().getVirtualRoomForRoom).toHaveBeenCalledWith(room.roomId);

            cli.emit(ClientEvent.Room, room);

            // called again after room event
            expect(VoipUserMapper.sharedInstance().getVirtualRoomForRoom).toHaveBeenCalledTimes(2);
        });
    });

    describe("video rooms", () => {
        beforeEach(async () => {
            // Make it a video room
            room.isElementVideoRoom = () => true;
            await SettingsStore.setValue("feature_video_rooms", null, SettingLevel.DEVICE, true);
        });

        it("normally doesn't open the chat panel", async () => {
            jest.spyOn(NotificationState.prototype, "isUnread", "get").mockReturnValue(false);
            await mountRoomView();
            expect(stores.rightPanelStore.isOpen).toEqual(false);
        });

        it("opens the chat panel if there are unread messages", async () => {
            jest.spyOn(NotificationState.prototype, "isUnread", "get").mockReturnValue(true);
            await mountRoomView();
            expect(stores.rightPanelStore.isOpen).toEqual(true);
            expect(stores.rightPanelStore.currentCard.phase).toEqual(RightPanelPhases.Timeline);
        });
    });

    describe("for a local room", () => {
        let localRoom: LocalRoom;

        beforeEach(async () => {
            localRoom = room = await createDmLocalRoom(cli, [new DirectoryMember({ user_id: "@user:example.com" })]);
            rooms.set(localRoom.roomId, localRoom);
            cli.store.storeRoom(room);
        });

        it("should remove the room from the store on unmount", async () => {
            const { unmount } = await renderRoomView();
            unmount();
            expect(cli.store.removeRoom).toHaveBeenCalledWith(room.roomId);
        });

        describe("in state NEW", () => {
            it("should match the snapshot", async () => {
                const { container } = await renderRoomView();
                expect(container).toMatchSnapshot();
            });

            describe("that is encrypted", () => {
                beforeEach(() => {
                    mocked(cli.isRoomEncrypted).mockReturnValue(true);
                    localRoom.encrypted = true;
                    localRoom.currentState.setStateEvents([
                        new MatrixEvent({
                            event_id: `~${localRoom.roomId}:${cli.makeTxnId()}`,
                            type: EventType.RoomEncryption,
                            content: {
                                algorithm: MEGOLM_ENCRYPTION_ALGORITHM,
                            },
                            sender: cli.getUserId()!,
                            state_key: "",
                            room_id: localRoom.roomId,
                            origin_server_ts: Date.now(),
                        }),
                    ]);
                });

                it("should match the snapshot", async () => {
                    const { container } = await renderRoomView();
                    expect(container).toMatchSnapshot();
                });
            });
        });

        it("in state CREATING should match the snapshot", async () => {
            localRoom.state = LocalRoomState.CREATING;
            const { container } = await renderRoomView();
            expect(container).toMatchSnapshot();
        });

        describe("in state ERROR", () => {
            beforeEach(async () => {
                localRoom.state = LocalRoomState.ERROR;
            });

            it("should match the snapshot", async () => {
                const { container } = await renderRoomView();
                expect(container).toMatchSnapshot();
            });

            it("clicking retry should set the room state to new dispatch a local room event", async () => {
                jest.spyOn(defaultDispatcher, "dispatch");
                const { getByText } = await renderRoomView();
                fireEvent.click(getByText("Retry"));
                expect(localRoom.state).toBe(LocalRoomState.NEW);
                expect(defaultDispatcher.dispatch).toHaveBeenCalledWith({
                    action: "local_room_event",
                    roomId: room.roomId,
                });
            });
        });
    });

    describe("when rendering a DM room with a single third-party invite", () => {
        beforeEach(async () => {
            room.currentState.setStateEvents([
                mkRoomMemberJoinEvent(cli.getSafeUserId(), room.roomId),
                mkThirdPartyInviteEvent(cli.getSafeUserId(), "user@example.com", room.roomId),
            ]);
            jest.spyOn(DMRoomMap.shared(), "getUserIdForRoomId").mockReturnValue(cli.getSafeUserId());
            jest.spyOn(DMRoomMap.shared(), "getRoomIds").mockReturnValue(new Set([room.roomId]));
            mocked(cli).isRoomEncrypted.mockReturnValue(true);
            await renderRoomView();
        });

        it("should render the »waiting for third-party« view", () => {
            expect(screen.getByText("Waiting for users to join Element")).toBeInTheDocument();
            expect(
                screen.getByText(
                    "Once invited users have joined Element, you will be able to chat and the room will be end-to-end encrypted",
                ),
            ).toBeInTheDocument();

            // no message composer
            expect(screen.queryByText("Send an encrypted message…")).not.toBeInTheDocument();
            expect(screen.queryByText("Send a message…")).not.toBeInTheDocument();
        });
    });

    describe("when there is a RoomView", () => {
        const widget1Id = "widget1";
        const widget2Id = "widget2";
        const otherUserId = "@other:example.com";

        const addJitsiWidget = async (id: string, user: string, ts?: number): Promise<void> => {
            const widgetEvent = mkEvent({
                event: true,
                room: room.roomId,
                user,
                type: "im.vector.modular.widgets",
                content: {
                    id,
                    name: "Jitsi",
                    type: WidgetType.JITSI.preferred,
                    url: "https://example.com",
                },
                skey: id,
                ts,
            });
            room.addLiveEvents([widgetEvent]);
            room.currentState.setStateEvents([widgetEvent]);
            cli.emit(RoomStateEvent.Events, widgetEvent, room.currentState, null);
            await flushPromises();
        };

        beforeEach(async () => {
            jest.spyOn(WidgetUtils, "setRoomWidget");
            const widgetStore = WidgetStore.instance;
            await setupAsyncStoreWithClient(widgetStore, cli);
            getRoomViewInstance();
        });

        const itShouldNotRemoveTheLastWidget = (): void => {
            it("should not remove the last widget", (): void => {
                expect(WidgetUtils.setRoomWidget).not.toHaveBeenCalledWith(room.roomId, widget2Id);
            });
        };

        describe("and there is a Jitsi widget from another user", () => {
            beforeEach(async () => {
                await addJitsiWidget(widget1Id, otherUserId, 10_000);
            });

            describe("and the current user adds a Jitsi widget after 10s", () => {
                beforeEach(async () => {
                    await addJitsiWidget(widget2Id, cli.getSafeUserId(), 20_000);
                });

                it("the last Jitsi widget should be removed", () => {
                    expect(WidgetUtils.setRoomWidget).toHaveBeenCalledWith(cli, room.roomId, widget2Id);
                });
            });

            describe("and the current user adds a Jitsi widget after two minutes", () => {
                beforeEach(async () => {
                    await addJitsiWidget(widget2Id, cli.getSafeUserId(), 130_000);
                });

                itShouldNotRemoveTheLastWidget();
            });

            describe("and the current user adds a Jitsi widget without timestamp", () => {
                beforeEach(async () => {
                    await addJitsiWidget(widget2Id, cli.getSafeUserId());
                });

                itShouldNotRemoveTheLastWidget();
            });
        });

        describe("and there is a Jitsi widget from another user without timestamp", () => {
            beforeEach(async () => {
                await addJitsiWidget(widget1Id, otherUserId);
            });

            describe("and the current user adds a Jitsi widget", () => {
                beforeEach(async () => {
                    await addJitsiWidget(widget2Id, cli.getSafeUserId(), 10_000);
                });

                itShouldNotRemoveTheLastWidget();
            });
        });
    });

    it("should show error view if failed to look up room alias", async () => {
        const { asFragment, findByText } = await renderRoomView(false);

        defaultDispatcher.dispatch<ViewRoomErrorPayload>({
            action: Action.ViewRoomError,
            room_alias: "#addy:server",
            room_id: null,
            err: new MatrixError({ errcode: "M_NOT_FOUND" }),
        });
        await emitPromise(stores.roomViewStore, UPDATE_EVENT);

        await findByText("Are you sure you're at the right place?");
        expect(asFragment()).toMatchSnapshot();
    });

    describe("knock rooms", () => {
        const client = createTestClient();

        beforeEach(() => {
            jest.spyOn(SettingsStore, "getValue").mockImplementation((setting) => setting === "feature_ask_to_join");
            jest.spyOn(room, "getJoinRule").mockReturnValue(JoinRule.Knock);
            jest.spyOn(dis, "dispatch");
        });

        it("allows to request to join", async () => {
            jest.spyOn(MatrixClientPeg, "safeGet").mockReturnValue(client);
            jest.spyOn(client, "knockRoom").mockResolvedValue({ room_id: room.roomId });

            await mountRoomView();
            fireEvent.click(screen.getByRole("button", { name: "Request access" }));
            await untilDispatch(Action.SubmitAskToJoin, dis);

            expect(dis.dispatch).toHaveBeenCalledWith({
                action: "submit_ask_to_join",
                roomId: room.roomId,
                opts: { reason: undefined },
            });
        });

        it("allows to cancel a join request", async () => {
            jest.spyOn(MatrixClientPeg, "safeGet").mockReturnValue(client);
            jest.spyOn(client, "leave").mockResolvedValue({});
            jest.spyOn(room, "getMyMembership").mockReturnValue(KnownMembership.Knock);

            await mountRoomView();
            fireEvent.click(screen.getByRole("button", { name: "Cancel request" }));
            await untilDispatch(Action.CancelAskToJoin, dis);

            expect(dis.dispatch).toHaveBeenCalledWith({ action: "cancel_ask_to_join", roomId: room.roomId });
        });
    });

    it("should close search results when edit is clicked", async () => {
        room.getMyMembership = jest.fn().mockReturnValue(KnownMembership.Join);

        const eventMapper = (obj: Partial<IEvent>) => new MatrixEvent(obj);

        const roomViewRef = createRef<_RoomView>();
        const { container, getByText, findByLabelText } = await mountRoomView(roomViewRef);
        // @ts-ignore - triggering a search organically is a lot of work
        roomViewRef.current!.setState({
            search: {
                searchId: 1,
                roomId: room.roomId,
                term: "search term",
                scope: SearchScope.Room,
                promise: Promise.resolve({
                    results: [
                        SearchResult.fromJson(
                            {
                                rank: 1,
                                result: {
                                    content: {
                                        body: "search term",
                                        msgtype: "m.text",
                                    },
                                    type: "m.room.message",
                                    event_id: "$eventId",
                                    sender: cli.getSafeUserId(),
                                    origin_server_ts: 123456789,
                                    room_id: room.roomId,
                                },
                                context: {
                                    events_before: [],
                                    events_after: [],
                                    profile_info: {},
                                },
                            },
                            eventMapper,
                        ),
                    ],
                    highlights: [],
                    count: 1,
                }),
                inProgress: false,
                count: 1,
            },
        });

        await waitFor(() => {
            expect(container.querySelector(".mx_RoomView_searchResultsPanel")).toBeVisible();
        });
        const prom = waitForElementToBeRemoved(() => container.querySelector(".mx_RoomView_searchResultsPanel"));

        await userEvent.hover(getByText("search term"));
        await userEvent.click(await findByLabelText("Edit"));

        await prom;
    });

    it("should switch rooms when edit is clicked on a search result for a different room", async () => {
        const room2 = new Room(`!${roomCount++}:example.org`, cli, "@alice:example.org");
        rooms.set(room2.roomId, room2);

        room.getMyMembership = jest.fn().mockReturnValue(KnownMembership.Join);

        const eventMapper = (obj: Partial<IEvent>) => new MatrixEvent(obj);

        const roomViewRef = createRef<_RoomView>();
        const { container, getByText, findByLabelText } = await mountRoomView(roomViewRef);
        // @ts-ignore - triggering a search organically is a lot of work
        roomViewRef.current!.setState({
            search: {
                searchId: 1,
                roomId: room.roomId,
                term: "search term",
                scope: SearchScope.All,
                promise: Promise.resolve({
                    results: [
                        SearchResult.fromJson(
                            {
                                rank: 1,
                                result: {
                                    content: {
                                        body: "search term",
                                        msgtype: "m.text",
                                    },
                                    type: "m.room.message",
                                    event_id: "$eventId",
                                    sender: cli.getSafeUserId(),
                                    origin_server_ts: 123456789,
                                    room_id: room2.roomId,
                                },
                                context: {
                                    events_before: [],
                                    events_after: [],
                                    profile_info: {},
                                },
                            },
                            eventMapper,
                        ),
                    ],
                    highlights: [],
                    count: 1,
                }),
                inProgress: false,
                count: 1,
            },
        });

        await waitFor(() => {
            expect(container.querySelector(".mx_RoomView_searchResultsPanel")).toBeVisible();
        });
        const prom = untilDispatch(Action.ViewRoom, dis);

        await userEvent.hover(getByText("search term"));
        await userEvent.click(await findByLabelText("Edit"));

        await expect(prom).resolves.toEqual(expect.objectContaining({ room_id: room2.roomId }));
    });

    it("fires Action.RoomLoaded", async () => {
        jest.spyOn(dis, "dispatch");
        await mountRoomView();
        expect(dis.dispatch).toHaveBeenCalledWith({ action: Action.RoomLoaded });
    });
});