/*
Copyright 2021-2022 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 { EventType, RoomType } from "matrix-js-sdk/src/@types/event";
import { JoinRule, Preset } from "matrix-js-sdk/src/@types/partials";
import { logger } from "matrix-js-sdk/src/logger";
import { Room, RoomEvent } from "matrix-js-sdk/src/models/room";
import React, { RefObject, useCallback, useContext, useRef, useState } from "react";

import MatrixClientContext from "../../contexts/MatrixClientContext";
import createRoom, { IOpts } from "../../createRoom";
import { shouldShowComponent } from "../../customisations/helpers/UIComponents";
import { Action } from "../../dispatcher/actions";
import defaultDispatcher from "../../dispatcher/dispatcher";
import { ActionPayload } from "../../dispatcher/payloads";
import { ViewRoomPayload } from "../../dispatcher/payloads/ViewRoomPayload";
import * as Email from "../../email";
import { useEventEmitterState } from "../../hooks/useEventEmitter";
import { useMyRoomMembership } from "../../hooks/useRoomMembers";
import { useFeatureEnabled } from "../../hooks/useSettings";
import { useStateArray } from "../../hooks/useStateArray";
import { _t } from "../../languageHandler";
import PosthogTrackers from "../../PosthogTrackers";
import { inviteMultipleToRoom, showRoomInviteDialog } from "../../RoomInvite";
import { UIComponent } from "../../settings/UIFeature";
import { UPDATE_EVENT } from "../../stores/AsyncStore";
import RightPanelStore from "../../stores/right-panel/RightPanelStore";
import { IRightPanelCard } from "../../stores/right-panel/RightPanelStoreIPanelState";
import { RightPanelPhases } from "../../stores/right-panel/RightPanelStorePhases";
import ResizeNotifier from "../../utils/ResizeNotifier";
import {
    shouldShowSpaceInvite,
    shouldShowSpaceSettings,
    showAddExistingRooms,
    showCreateNewRoom,
    showCreateNewSubspace,
    showSpaceInvite,
    showSpaceSettings,
} from "../../utils/space";
import RoomAvatar from "../views/avatars/RoomAvatar";
import { BetaPill } from "../views/beta/BetaCard";
import IconizedContextMenu, {
    IconizedContextMenuOption,
    IconizedContextMenuOptionList,
} from "../views/context_menus/IconizedContextMenu";
import {
    AddExistingToSpace,
    defaultDmsRenderer,
    defaultRoomsRenderer,
} from "../views/dialogs/AddExistingToSpaceDialog";
import AccessibleButton, { ButtonEvent } from "../views/elements/AccessibleButton";
import AccessibleTooltipButton from "../views/elements/AccessibleTooltipButton";
import ErrorBoundary from "../views/elements/ErrorBoundary";
import Field from "../views/elements/Field";
import RoomFacePile from "../views/elements/RoomFacePile";
import RoomName from "../views/elements/RoomName";
import RoomTopic from "../views/elements/RoomTopic";
import withValidation from "../views/elements/Validation";
import RoomInfoLine from "../views/rooms/RoomInfoLine";
import RoomPreviewCard from "../views/rooms/RoomPreviewCard";
import { SpaceFeedbackPrompt } from "../views/spaces/SpaceCreateMenu";
import SpacePublicShare from "../views/spaces/SpacePublicShare";
import { ChevronFace, ContextMenuButton, useContextMenu } from "./ContextMenu";
import MainSplit from './MainSplit';
import RightPanel from "./RightPanel";
import SpaceHierarchy, { showRoom } from "./SpaceHierarchy";

interface IProps {
    space: Room;
    justCreatedOpts?: IOpts;
    resizeNotifier: ResizeNotifier;
    onJoinButtonClicked(): void;
    onRejectButtonClicked(): void;
}

interface IState {
    phase: Phase;
    firstRoomId?: string; // internal state for the creation wizard
    showRightPanel: boolean;
    myMembership: string;
}

enum Phase {
    Landing,
    PublicCreateRooms,
    PublicShare,
    PrivateScope,
    PrivateInvite,
    PrivateCreateRooms,
    PrivateExistingRooms,
}

const SpaceLandingAddButton = ({ space }) => {
    const [menuDisplayed, handle, openMenu, closeMenu] = useContextMenu();
    const canCreateRoom = shouldShowComponent(UIComponent.CreateRooms);
    const canCreateSpace = shouldShowComponent(UIComponent.CreateSpaces);
    const videoRoomsEnabled = useFeatureEnabled("feature_video_rooms");

    let contextMenu;
    if (menuDisplayed) {
        const rect = handle.current.getBoundingClientRect();
        contextMenu = <IconizedContextMenu
            left={rect.left + window.scrollX + 0}
            top={rect.bottom + window.scrollY + 8}
            chevronFace={ChevronFace.None}
            onFinished={closeMenu}
            className="mx_RoomTile_contextMenu"
            compact
        >
            <IconizedContextMenuOptionList first>
                { canCreateRoom && <>
                    <IconizedContextMenuOption
                        label={_t("New room")}
                        iconClassName="mx_RoomList_iconNewRoom"
                        onClick={async (e) => {
                            e.preventDefault();
                            e.stopPropagation();
                            closeMenu();

                            PosthogTrackers.trackInteraction("WebSpaceHomeCreateRoomButton", e);
                            if (await showCreateNewRoom(space)) {
                                defaultDispatcher.fire(Action.UpdateSpaceHierarchy);
                            }
                        }}
                    />
                    { videoRoomsEnabled && (
                        <IconizedContextMenuOption
                            label={_t("New video room")}
                            iconClassName="mx_RoomList_iconNewVideoRoom"
                            onClick={async (e) => {
                                e.preventDefault();
                                e.stopPropagation();
                                closeMenu();

                                if (await showCreateNewRoom(space, RoomType.ElementVideo)) {
                                    defaultDispatcher.fire(Action.UpdateSpaceHierarchy);
                                }
                            }}
                        >
                            <BetaPill />
                        </IconizedContextMenuOption>
                    ) }
                </> }
                <IconizedContextMenuOption
                    label={_t("Add existing room")}
                    iconClassName="mx_RoomList_iconAddExistingRoom"
                    onClick={(e) => {
                        e.preventDefault();
                        e.stopPropagation();
                        closeMenu();
                        showAddExistingRooms(space);
                    }}
                />
                { canCreateSpace &&
                    <IconizedContextMenuOption
                        label={_t("Add space")}
                        iconClassName="mx_RoomList_iconPlus"
                        onClick={(e) => {
                            e.preventDefault();
                            e.stopPropagation();
                            closeMenu();
                            showCreateNewSubspace(space);
                        }}
                    >
                        <BetaPill />
                    </IconizedContextMenuOption>
                }
            </IconizedContextMenuOptionList>
        </IconizedContextMenu>;
    }

    return <>
        <ContextMenuButton
            kind="primary"
            inputRef={handle}
            onClick={openMenu}
            isExpanded={menuDisplayed}
            label={_t("Add")}
        >
            { _t("Add") }
        </ContextMenuButton>
        { contextMenu }
    </>;
};

const SpaceLanding = ({ space }: { space: Room }) => {
    const cli = useContext(MatrixClientContext);
    const myMembership = useMyRoomMembership(space);
    const userId = cli.getUserId();

    const storeIsShowingSpaceMembers = useCallback(
        () => RightPanelStore.instance.isOpenForRoom(space.roomId)
            && RightPanelStore.instance.currentCardForRoom(space.roomId)?.phase === RightPanelPhases.SpaceMemberList,
        [space.roomId],
    );
    const isShowingMembers = useEventEmitterState(RightPanelStore.instance, UPDATE_EVENT, storeIsShowingSpaceMembers);

    let inviteButton;
    if (shouldShowSpaceInvite(space) && shouldShowComponent(UIComponent.InviteUsers)) {
        inviteButton = (
            <AccessibleButton
                kind="primary"
                className="mx_SpaceRoomView_landing_inviteButton"
                onClick={() => {
                    showSpaceInvite(space);
                }}
            >
                { _t("Invite") }
            </AccessibleButton>
        );
    }

    const hasAddRoomPermissions = myMembership === "join" &&
        space.currentState.maySendStateEvent(EventType.SpaceChild, userId);

    let addRoomButton;
    if (hasAddRoomPermissions) {
        addRoomButton = <SpaceLandingAddButton space={space} />;
    }

    let settingsButton;
    if (shouldShowSpaceSettings(space)) {
        settingsButton = <AccessibleTooltipButton
            className="mx_SpaceRoomView_landing_settingsButton"
            onClick={() => {
                showSpaceSettings(space);
            }}
            title={_t("Settings")}
        />;
    }

    const onMembersClick = () => {
        RightPanelStore.instance.setCard({ phase: RightPanelPhases.SpaceMemberList });
    };

    return <div className="mx_SpaceRoomView_landing">
        <div className="mx_SpaceRoomView_landing_header">
            <RoomAvatar room={space} height={80} width={80} viewAvatarOnClick={true} />
            <SpaceFeedbackPrompt />
        </div>
        <div className="mx_SpaceRoomView_landing_name">
            <RoomName room={space}>
                { (name) => {
                    const tags = { name: () => <h1>{ name }</h1> };
                    return _t("Welcome to <name/>", {}, tags) as JSX.Element;
                } }
            </RoomName>
        </div>
        <div className="mx_SpaceRoomView_landing_infoBar">
            <RoomInfoLine room={space} />
            <div className="mx_SpaceRoomView_landing_infoBar_interactive">
                <RoomFacePile
                    room={space}
                    onlyKnownUsers={false}
                    numShown={7}
                    onClick={isShowingMembers ? undefined : onMembersClick}
                />
                { inviteButton }
                { settingsButton }
            </div>
        </div>
        <RoomTopic room={space} className="mx_SpaceRoomView_landing_topic" />

        <SpaceHierarchy space={space} showRoom={showRoom} additionalButtons={addRoomButton} />
    </div>;
};

const SpaceSetupFirstRooms = ({ space, title, description, onFinished }) => {
    const [busy, setBusy] = useState(false);
    const [error, setError] = useState("");
    const numFields = 3;
    const placeholders = [_t("General"), _t("Random"), _t("Support")];
    const [roomNames, setRoomName] = useStateArray(numFields, [_t("General"), _t("Random"), ""]);
    const fields = new Array(numFields).fill(0).map((x, i) => {
        const name = "roomName" + i;
        return <Field
            key={name}
            name={name}
            type="text"
            label={_t("Room name")}
            placeholder={placeholders[i]}
            value={roomNames[i]}
            onChange={ev => setRoomName(i, ev.target.value)}
            autoFocus={i === 2}
            disabled={busy}
            autoComplete="off"
        />;
    });

    const onNextClick = async (ev: ButtonEvent) => {
        ev.preventDefault();
        if (busy) return;
        setError("");
        setBusy(true);
        try {
            const isPublic = space.getJoinRule() === JoinRule.Public;
            const filteredRoomNames = roomNames.map(name => name.trim()).filter(Boolean);
            const roomIds = await Promise.all(filteredRoomNames.map(name => {
                return createRoom({
                    createOpts: {
                        preset: isPublic ? Preset.PublicChat : Preset.PrivateChat,
                        name,
                    },
                    spinner: false,
                    encryption: false,
                    andView: false,
                    inlineErrors: true,
                    parentSpace: space,
                    joinRule: !isPublic ? JoinRule.Restricted : undefined,
                    suggested: true,
                });
            }));
            onFinished(roomIds[0]);
        } catch (e) {
            logger.error("Failed to create initial space rooms", e);
            setError(_t("Failed to create initial space rooms"));
        }
        setBusy(false);
    };

    let onClick = (ev: ButtonEvent) => {
        ev.preventDefault();
        onFinished();
    };
    let buttonLabel = _t("Skip for now");
    if (roomNames.some(name => name.trim())) {
        onClick = onNextClick;
        buttonLabel = busy ? _t("Creating rooms...") : _t("Continue");
    }

    return <div>
        <h1>{ title }</h1>
        <div className="mx_SpaceRoomView_description">{ description }</div>

        { error && <div className="mx_SpaceRoomView_errorText">{ error }</div> }
        <form onSubmit={onClick} id="mx_SpaceSetupFirstRooms">
            { fields }
        </form>

        <div className="mx_SpaceRoomView_buttons">
            <AccessibleButton
                kind="primary"
                disabled={busy}
                onClick={onClick}
                element="input"
                type="submit"
                form="mx_SpaceSetupFirstRooms"
                value={buttonLabel}
            />
        </div>
    </div>;
};

const SpaceAddExistingRooms = ({ space, onFinished }) => {
    return <div>
        <h1>{ _t("What do you want to organise?") }</h1>
        <div className="mx_SpaceRoomView_description">
            { _t("Pick rooms or conversations to add. This is just a space for you, " +
                "no one will be informed. You can add more later.") }
        </div>

        <AddExistingToSpace
            space={space}
            emptySelectionButton={
                <AccessibleButton kind="primary" onClick={onFinished}>
                    { _t("Skip for now") }
                </AccessibleButton>
            }
            filterPlaceholder={_t("Search for rooms or spaces")}
            onFinished={onFinished}
            roomsRenderer={defaultRoomsRenderer}
            dmsRenderer={defaultDmsRenderer}
        />
    </div>;
};

interface ISpaceSetupPublicShareProps extends Pick<IProps & IState, "justCreatedOpts" | "space" | "firstRoomId"> {
    onFinished(): void;
}

const SpaceSetupPublicShare = ({ justCreatedOpts, space, onFinished, firstRoomId }: ISpaceSetupPublicShareProps) => {
    return <div className="mx_SpaceRoomView_publicShare">
        <h1>{ _t("Share %(name)s", {
            name: justCreatedOpts?.createOpts?.name || space.name,
        }) }</h1>
        <div className="mx_SpaceRoomView_description">
            { _t("It's just you at the moment, it will be even better with others.") }
        </div>

        <SpacePublicShare space={space} />

        <div className="mx_SpaceRoomView_buttons">
            <AccessibleButton kind="primary" onClick={onFinished}>
                { firstRoomId ? _t("Go to my first room") : _t("Go to my space") }
            </AccessibleButton>
        </div>
    </div>;
};

const SpaceSetupPrivateScope = ({ space, justCreatedOpts, onFinished }) => {
    return <div className="mx_SpaceRoomView_privateScope">
        <h1>{ _t("Who are you working with?") }</h1>
        <div className="mx_SpaceRoomView_description">
            { _t("Make sure the right people have access to %(name)s", {
                name: justCreatedOpts?.createOpts?.name || space.name,
            }) }
        </div>

        <AccessibleButton
            className="mx_SpaceRoomView_privateScope_justMeButton"
            onClick={() => { onFinished(false); }}
        >
            <h3>{ _t("Just me") }</h3>
            <div>{ _t("A private space to organise your rooms") }</div>
        </AccessibleButton>
        <AccessibleButton
            className="mx_SpaceRoomView_privateScope_meAndMyTeammatesButton"
            onClick={() => { onFinished(true); }}
        >
            <h3>{ _t("Me and my teammates") }</h3>
            <div>{ _t("A private space for you and your teammates") }</div>
        </AccessibleButton>
    </div>;
};

const validateEmailRules = withValidation({
    rules: [{
        key: "email",
        test: ({ value }) => !value || Email.looksValid(value),
        invalid: () => _t("Doesn't look like a valid email address"),
    }],
});

const SpaceSetupPrivateInvite = ({ space, onFinished }) => {
    const [busy, setBusy] = useState(false);
    const [error, setError] = useState("");
    const numFields = 3;
    const fieldRefs: RefObject<Field>[] = [useRef(), useRef(), useRef()];
    const [emailAddresses, setEmailAddress] = useStateArray(numFields, "");
    const fields = new Array(numFields).fill(0).map((x, i) => {
        const name = "emailAddress" + i;
        return <Field
            key={name}
            name={name}
            type="text"
            label={_t("Email address")}
            placeholder={_t("Email")}
            value={emailAddresses[i]}
            onChange={ev => setEmailAddress(i, ev.target.value)}
            ref={fieldRefs[i]}
            onValidate={validateEmailRules}
            autoFocus={i === 0}
            disabled={busy}
        />;
    });

    const onNextClick = async (ev) => {
        ev.preventDefault();
        if (busy) return;
        setError("");
        for (let i = 0; i < fieldRefs.length; i++) {
            const fieldRef = fieldRefs[i];
            const valid = await fieldRef.current.validate({ allowEmpty: true });

            if (valid === false) { // true/null are allowed
                fieldRef.current.focus();
                fieldRef.current.validate({ allowEmpty: true, focused: true });
                return;
            }
        }

        setBusy(true);
        const targetIds = emailAddresses.map(name => name.trim()).filter(Boolean);
        try {
            const result = await inviteMultipleToRoom(space.roomId, targetIds);

            const failedUsers = Object.keys(result.states).filter(a => result.states[a] === "error");
            if (failedUsers.length > 0) {
                logger.log("Failed to invite users to space: ", result);
                setError(_t("Failed to invite the following users to your space: %(csvUsers)s", {
                    csvUsers: failedUsers.join(", "),
                }));
            } else {
                onFinished();
            }
        } catch (err) {
            logger.error("Failed to invite users to space: ", err);
            setError(_t("We couldn't invite those users. Please check the users you want to invite and try again."));
        }
        setBusy(false);
    };

    let onClick = (ev) => {
        ev.preventDefault();
        onFinished();
    };
    let buttonLabel = _t("Skip for now");
    if (emailAddresses.some(name => name.trim())) {
        onClick = onNextClick;
        buttonLabel = busy ? _t("Inviting...") : _t("Continue");
    }

    return <div className="mx_SpaceRoomView_inviteTeammates">
        <h1>{ _t("Invite your teammates") }</h1>
        <div className="mx_SpaceRoomView_description">
            { _t("Make sure the right people have access. You can invite more later.") }
        </div>

        <div className="mx_SpaceRoomView_inviteTeammates_betaDisclaimer">
            { _t("<b>This is an experimental feature.</b> For now, " +
                "new users receiving an invite will have to open the invite on <link/> to actually join.", {}, {
                b: sub => <b>{ sub }</b>,
                link: () => <a href="https://app.element.io/" rel="noreferrer noopener" target="_blank">
                    app.element.io
                </a>,
            }) }
        </div>

        { error && <div className="mx_SpaceRoomView_errorText">{ error }</div> }
        <form onSubmit={onClick} id="mx_SpaceSetupPrivateInvite">
            { fields }
        </form>

        <div className="mx_SpaceRoomView_inviteTeammates_buttons">
            <AccessibleButton
                className="mx_SpaceRoomView_inviteTeammates_inviteDialogButton"
                onClick={() => showRoomInviteDialog(space.roomId)}
            >
                { _t("Invite by username") }
            </AccessibleButton>
        </div>

        <div className="mx_SpaceRoomView_buttons">
            <AccessibleButton
                kind="primary"
                disabled={busy}
                onClick={onClick}
                element="input"
                type="submit"
                form="mx_SpaceSetupPrivateInvite"
                value={buttonLabel}
            />
        </div>
    </div>;
};

export default class SpaceRoomView extends React.PureComponent<IProps, IState> {
    static contextType = MatrixClientContext;
    public context!: React.ContextType<typeof MatrixClientContext>;

    private readonly creator: string;
    private readonly dispatcherRef: string;

    constructor(props: IProps, context: React.ContextType<typeof MatrixClientContext>) {
        super(props, context);

        let phase = Phase.Landing;

        this.creator = this.props.space.currentState.getStateEvents(EventType.RoomCreate, "")?.getSender();
        const showSetup = this.props.justCreatedOpts && context.getUserId() === this.creator;

        if (showSetup) {
            phase = this.props.justCreatedOpts.createOpts.preset === Preset.PublicChat
                ? Phase.PublicCreateRooms : Phase.PrivateScope;
        }

        this.state = {
            phase,
            showRightPanel: RightPanelStore.instance.isOpenForRoom(this.props.space.roomId),
            myMembership: this.props.space.getMyMembership(),
        };

        this.dispatcherRef = defaultDispatcher.register(this.onAction);
        RightPanelStore.instance.on(UPDATE_EVENT, this.onRightPanelStoreUpdate);
    }

    componentDidMount() {
        this.context.on(RoomEvent.MyMembership, this.onMyMembership);
    }

    componentWillUnmount() {
        defaultDispatcher.unregister(this.dispatcherRef);
        RightPanelStore.instance.off(UPDATE_EVENT, this.onRightPanelStoreUpdate);
        this.context.off(RoomEvent.MyMembership, this.onMyMembership);
    }

    private onMyMembership = (room: Room, myMembership: string) => {
        if (room.roomId === this.props.space.roomId) {
            this.setState({ myMembership });
        }
    };

    private onRightPanelStoreUpdate = () => {
        this.setState({
            showRightPanel: RightPanelStore.instance.isOpenForRoom(this.props.space.roomId),
        });
    };

    private onAction = (payload: ActionPayload) => {
        if (payload.action === Action.ViewRoom && payload.room_id === this.props.space.roomId) {
            this.setState({ phase: Phase.Landing });
            return;
        }

        if (payload.action !== Action.ViewUser && payload.action !== "view_3pid_invite") return;

        if (payload.action === Action.ViewUser && payload.member) {
            const spaceMemberInfoCard: IRightPanelCard = {
                phase: RightPanelPhases.SpaceMemberInfo,
                state: { spaceId: this.props.space.roomId, member: payload.member },
            };
            if (payload.push) {
                RightPanelStore.instance.pushCard(spaceMemberInfoCard);
            } else {
                RightPanelStore.instance.setCards([
                    { phase: RightPanelPhases.SpaceMemberList, state: { spaceId: this.props.space.roomId } },
                    spaceMemberInfoCard,
                ]);
            }
        } else if (payload.action === "view_3pid_invite" && payload.event) {
            RightPanelStore.instance.setCard({
                phase: RightPanelPhases.Space3pidMemberInfo,
                state: { spaceId: this.props.space.roomId, memberInfoEvent: payload.event },
            });
        } else {
            RightPanelStore.instance.setCard({
                phase: RightPanelPhases.SpaceMemberList,
                state: { spaceId: this.props.space.roomId },
            });
        }
    };

    private goToFirstRoom = async () => {
        if (this.state.firstRoomId) {
            defaultDispatcher.dispatch<ViewRoomPayload>({
                action: Action.ViewRoom,
                room_id: this.state.firstRoomId,
                metricsTrigger: undefined, // other
            });
            return;
        }

        this.setState({ phase: Phase.Landing });
    };

    private renderBody() {
        switch (this.state.phase) {
            case Phase.Landing:
                if (this.state.myMembership === "join") {
                    return <SpaceLanding space={this.props.space} />;
                } else {
                    return <RoomPreviewCard
                        room={this.props.space}
                        onJoinButtonClicked={this.props.onJoinButtonClicked}
                        onRejectButtonClicked={this.props.onRejectButtonClicked}
                    />;
                }
            case Phase.PublicCreateRooms:
                return <SpaceSetupFirstRooms
                    space={this.props.space}
                    title={_t("What are some things you want to discuss in %(spaceName)s?", {
                        spaceName: this.props.justCreatedOpts?.createOpts?.name || this.props.space.name,
                    })}
                    description={<>
                        { _t("Let's create a room for each of them.") }
                        <br />
                        { _t("You can add more later too, including already existing ones.") }
                    </>}
                    onFinished={(firstRoomId: string) => this.setState({ phase: Phase.PublicShare, firstRoomId })}
                />;
            case Phase.PublicShare:
                return <SpaceSetupPublicShare
                    justCreatedOpts={this.props.justCreatedOpts}
                    space={this.props.space}
                    onFinished={this.goToFirstRoom}
                    firstRoomId={this.state.firstRoomId}
                />;

            case Phase.PrivateScope:
                return <SpaceSetupPrivateScope
                    space={this.props.space}
                    justCreatedOpts={this.props.justCreatedOpts}
                    onFinished={(invite: boolean) => {
                        this.setState({ phase: invite ? Phase.PrivateCreateRooms : Phase.PrivateExistingRooms });
                    }}
                />;
            case Phase.PrivateInvite:
                return <SpaceSetupPrivateInvite
                    space={this.props.space}
                    onFinished={() => this.setState({ phase: Phase.Landing })}
                />;
            case Phase.PrivateCreateRooms:
                return <SpaceSetupFirstRooms
                    space={this.props.space}
                    title={_t("What projects are your team working on?")}
                    description={<>
                        { _t("We'll create rooms for each of them.") }
                        <br />
                        { _t("You can add more later too, including already existing ones.") }
                    </>}
                    onFinished={(firstRoomId: string) => this.setState({ phase: Phase.PrivateInvite, firstRoomId })}
                />;
            case Phase.PrivateExistingRooms:
                return <SpaceAddExistingRooms
                    space={this.props.space}
                    onFinished={() => this.setState({ phase: Phase.Landing })}
                />;
        }
    }

    render() {
        const rightPanel = this.state.showRightPanel && this.state.phase === Phase.Landing
            ? <RightPanel room={this.props.space} resizeNotifier={this.props.resizeNotifier} />
            : null;

        return <main className="mx_SpaceRoomView">
            <ErrorBoundary>
                <MainSplit panel={rightPanel} resizeNotifier={this.props.resizeNotifier}>
                    { this.renderBody() }
                </MainSplit>
            </ErrorBoundary>
        </main>;
    }
}