/*
Copyright 2017 Vector Creations Ltd.
Copyright 2017 New Vector Ltd.

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 PropTypes from 'prop-types';
import Promise from 'bluebird';
import MatrixClientPeg from '../../MatrixClientPeg';
import sdk from '../../index';
import dis from '../../dispatcher';
import { sanitizedHtmlNode } from '../../HtmlUtils';
import { _t } from '../../languageHandler';
import AccessibleButton from '../views/elements/AccessibleButton';
import Modal from '../../Modal';
import classnames from 'classnames';

import GroupStoreCache from '../../stores/GroupStoreCache';
import GroupStore from '../../stores/GroupStore';

const RoomSummaryType = PropTypes.shape({
    room_id: PropTypes.string.isRequired,
    profile: PropTypes.shape({
        name: PropTypes.string,
        avatar_url: PropTypes.string,
        canonical_alias: PropTypes.string,
    }).isRequired,
});

const UserSummaryType = PropTypes.shape({
    summaryInfo: PropTypes.shape({
        user_id: PropTypes.string.isRequired,
        role_id: PropTypes.string,
        avatar_url: PropTypes.string,
        displayname: PropTypes.string,
    }).isRequired,
});

const CategoryRoomList = React.createClass({
    displayName: 'CategoryRoomList',

    props: {
        rooms: PropTypes.arrayOf(RoomSummaryType).isRequired,
        category: PropTypes.shape({
            profile: PropTypes.shape({
                name: PropTypes.string,
            }).isRequired,
        }),
        groupId: PropTypes.string.isRequired,

        // Whether the list should be editable
        editing: PropTypes.bool.isRequired,
    },

    onAddRoomsClicked: function(ev) {
        ev.preventDefault();
        const AddressPickerDialog = sdk.getComponent("dialogs.AddressPickerDialog");
        Modal.createTrackedDialog('Add Rooms to Group Summary', '', AddressPickerDialog, {
            title: _t('Add rooms to the group summary'),
            description: _t("Which rooms would you like to add to this summary?"),
            placeholder: _t("Room name or alias"),
            button: _t("Add to summary"),
            pickerType: 'room',
            validAddressTypes: ['mx-room-id'],
            groupId: this.props.groupId,
            onFinished: (success, addrs) => {
                if (!success) return;
                const errorList = [];
                Promise.all(addrs.map((addr) => {
                    return this.context.groupStore
                        .addRoomToGroupSummary(addr.address)
                        .catch(() => { errorList.push(addr.address); })
                        .reflect();
                })).then(() => {
                    if (errorList.length === 0) {
                        return;
                    }
                    const ErrorDialog = sdk.getComponent("dialogs.ErrorDialog");
                    Modal.createTrackedDialog(
                        'Failed to add the following room to the group summary',
                        '', ErrorDialog,
                    {
                        title: _t(
                            "Failed to add the following rooms to the summary of %(groupId)s:",
                            {groupId: this.props.groupId},
                        ),
                        description: errorList.join(", "),
                    });
                });
            },
        });
    },

    render: function() {
        const TintableSvg = sdk.getComponent("elements.TintableSvg");
        const addButton = this.props.editing ?
            (<AccessibleButton className="mx_GroupView_featuredThings_addButton" onClick={this.onAddRoomsClicked}>
                <TintableSvg src="img/icons-create-room.svg" width="64" height="64" />
                <div className="mx_GroupView_featuredThings_addButton_label">
                    { _t('Add a Room') }
                </div>
            </AccessibleButton>) : <div />;

        const roomNodes = this.props.rooms.map((r) => {
            return <FeaturedRoom
                key={r.room_id}
                groupId={this.props.groupId}
                editing={this.props.editing}
                summaryInfo={r} />;
        });

        let catHeader = <div />;
        if (this.props.category && this.props.category.profile) {
            catHeader = <div className="mx_GroupView_featuredThings_category">
            { this.props.category.profile.name }
        </div>;
        }
        return <div className="mx_GroupView_featuredThings_container">
            { catHeader }
            { roomNodes }
            { addButton }
        </div>;
    },
});

const FeaturedRoom = React.createClass({
    displayName: 'FeaturedRoom',

    props: {
        summaryInfo: RoomSummaryType.isRequired,
        editing: PropTypes.bool.isRequired,
        groupId: PropTypes.string.isRequired,
    },

    onClick: function(e) {
        e.preventDefault();
        e.stopPropagation();

        dis.dispatch({
            action: 'view_room',
            room_alias: this.props.summaryInfo.profile.canonical_alias,
            room_id: this.props.summaryInfo.room_id,
        });
    },

    onDeleteClicked: function(e) {
        e.preventDefault();
        e.stopPropagation();
        this.context.groupStore.removeRoomFromGroupSummary(
            this.props.summaryInfo.room_id,
        ).catch((err) => {
            console.error('Error whilst removing room from group summary', err);
            const roomName = this.props.summaryInfo.name ||
                this.props.summaryInfo.canonical_alias ||
                this.props.summaryInfo.room_id;
            const ErrorDialog = sdk.getComponent("dialogs.ErrorDialog");
            Modal.createTrackedDialog(
                'Failed to remove room from group summary',
                '', ErrorDialog,
            {
                title: _t(
                    "Failed to remove the room from the summary of %(groupId)s",
                    {groupId: this.props.groupId},
                ),
                description: _t("The room '%(roomName)s' could not be removed from the summary.", {roomName}),
            });
        });
    },

    render: function() {
        const RoomAvatar = sdk.getComponent("avatars.RoomAvatar");

        const roomName = this.props.summaryInfo.profile.name ||
            this.props.summaryInfo.profile.canonical_alias ||
            _t("Unnamed Room");

        const oobData = {
            roomId: this.props.summaryInfo.room_id,
            avatarUrl: this.props.summaryInfo.profile.avatar_url,
            name: roomName,
        };

        let permalink = null;
        if (this.props.summaryInfo.profile && this.props.summaryInfo.profile.canonical_alias) {
            permalink = 'https://matrix.to/#/' + this.props.summaryInfo.profile.canonical_alias;
        }

        let roomNameNode = null;
        if (permalink) {
            roomNameNode = <a href={permalink} onClick={this.onClick} >{ roomName }</a>;
        } else {
            roomNameNode = <span>{ roomName }</span>;
        }

        const deleteButton = this.props.editing ?
            <img
                className="mx_GroupView_featuredThing_deleteButton"
                src="img/cancel-small.svg"
                width="14"
                height="14"
                alt="Delete"
                onClick={this.onDeleteClicked} />
            : <div />;

        return <AccessibleButton className="mx_GroupView_featuredThing" onClick={this.onClick}>
            <RoomAvatar oobData={oobData} width={64} height={64} />
            <div className="mx_GroupView_featuredThing_name">{ roomNameNode }</div>
            { deleteButton }
        </AccessibleButton>;
    },
});

const RoleUserList = React.createClass({
    displayName: 'RoleUserList',

    props: {
        users: PropTypes.arrayOf(UserSummaryType).isRequired,
        role: PropTypes.shape({
            profile: PropTypes.shape({
                name: PropTypes.string,
            }).isRequired,
        }),
        groupId: PropTypes.string.isRequired,

        // Whether the list should be editable
        editing: PropTypes.bool.isRequired,
    },

    onAddUsersClicked: function(ev) {
        ev.preventDefault();
        const AddressPickerDialog = sdk.getComponent("dialogs.AddressPickerDialog");
        Modal.createTrackedDialog('Add Users to Group Summary', '', AddressPickerDialog, {
            title: _t('Add users to the group summary'),
            description: _t("Who would you like to add to this summary?"),
            placeholder: _t("Name or matrix ID"),
            button: _t("Add to summary"),
            validAddressTypes: ['mx-user-id'],
            groupId: this.props.groupId,
            shouldOmitSelf: false,
            onFinished: (success, addrs) => {
                if (!success) return;
                const errorList = [];
                Promise.all(addrs.map((addr) => {
                    return this.context.groupStore
                        .addUserToGroupSummary(addr.address)
                        .catch(() => { errorList.push(addr.address); })
                        .reflect();
                })).then(() => {
                    if (errorList.length === 0) {
                        return;
                    }
                    const ErrorDialog = sdk.getComponent("dialogs.ErrorDialog");
                    Modal.createTrackedDialog(
                        'Failed to add the following users to the group summary',
                        '', ErrorDialog,
                    {
                        title: _t(
                            "Failed to add the following users to the summary of %(groupId)s:",
                            {groupId: this.props.groupId},
                        ),
                        description: errorList.join(", "),
                    });
                });
            },
        });
    },

    render: function() {
        const TintableSvg = sdk.getComponent("elements.TintableSvg");
        const addButton = this.props.editing ?
            (<AccessibleButton className="mx_GroupView_featuredThings_addButton" onClick={this.onAddUsersClicked}>
                 <TintableSvg src="img/icons-create-room.svg" width="64" height="64" />
                 <div className="mx_GroupView_featuredThings_addButton_label">
                     { _t('Add a User') }
                 </div>
             </AccessibleButton>) : <div />;
        const userNodes = this.props.users.map((u) => {
            return <FeaturedUser
                key={u.user_id}
                summaryInfo={u}
                editing={this.props.editing}
                groupId={this.props.groupId} />;
        });
        let roleHeader = <div />;
        if (this.props.role && this.props.role.profile) {
            roleHeader = <div className="mx_GroupView_featuredThings_category">{ this.props.role.profile.name }</div>;
        }
        return <div className="mx_GroupView_featuredThings_container">
            { roleHeader }
            { userNodes }
            { addButton }
        </div>;
    },
});

const FeaturedUser = React.createClass({
    displayName: 'FeaturedUser',

    props: {
        summaryInfo: UserSummaryType.isRequired,
        editing: PropTypes.bool.isRequired,
        groupId: PropTypes.string.isRequired,
    },

    onClick: function(e) {
        e.preventDefault();
        e.stopPropagation();

        dis.dispatch({
            action: 'view_start_chat_or_reuse',
            user_id: this.props.summaryInfo.user_id,
            go_home_on_cancel: false,
        });
    },

    onDeleteClicked: function(e) {
        e.preventDefault();
        e.stopPropagation();
        this.context.groupStore.removeUserFromGroupSummary(
            this.props.summaryInfo.user_id,
        ).catch((err) => {
            console.error('Error whilst removing user from group summary', err);
            const displayName = this.props.summaryInfo.displayname || this.props.summaryInfo.user_id;
            const ErrorDialog = sdk.getComponent("dialogs.ErrorDialog");
            Modal.createTrackedDialog(
                'Failed to remove user from group summary',
                '', ErrorDialog,
            {
                title: _t(
                    "Failed to remove a user from the summary of %(groupId)s",
                    {groupId: this.props.groupId},
                ),
                description: _t("The user '%(displayName)s' could not be removed from the summary.", {displayName}),
            });
        });
    },

    render: function() {
        const BaseAvatar = sdk.getComponent("avatars.BaseAvatar");
        const name = this.props.summaryInfo.displayname || this.props.summaryInfo.user_id;

        const permalink = 'https://matrix.to/#/' + this.props.summaryInfo.user_id;
        const userNameNode = <a href={permalink} onClick={this.onClick}>{ name }</a>;
        const httpUrl = MatrixClientPeg.get()
            .mxcUrlToHttp(this.props.summaryInfo.avatar_url, 64, 64);

        const deleteButton = this.props.editing ?
            <img
                className="mx_GroupView_featuredThing_deleteButton"
                src="img/cancel-small.svg"
                width="14"
                height="14"
                alt="Delete"
                onClick={this.onDeleteClicked} />
            : <div />;

        return <AccessibleButton className="mx_GroupView_featuredThing" onClick={this.onClick}>
            <BaseAvatar name={name} url={httpUrl} width={64} height={64} />
            <div className="mx_GroupView_featuredThing_name">{ userNameNode }</div>
            { deleteButton }
        </AccessibleButton>;
    },
});

const GroupContext = {
    groupStore: React.PropTypes.instanceOf(GroupStore).isRequired,
};

CategoryRoomList.contextTypes = GroupContext;
FeaturedRoom.contextTypes = GroupContext;
RoleUserList.contextTypes = GroupContext;
FeaturedUser.contextTypes = GroupContext;

export default React.createClass({
    displayName: 'GroupView',

    propTypes: {
        groupId: PropTypes.string.isRequired,
    },

    childContextTypes: {
        groupStore: React.PropTypes.instanceOf(GroupStore),
    },

    getChildContext: function() {
        return {
            groupStore: this._groupStore,
        };
    },

    getInitialState: function() {
        return {
            summary: null,
            error: null,
            editing: false,
            saving: false,
            uploadingAvatar: false,
            membershipBusy: false,
            publicityBusy: false,
        };
    },

    componentWillMount: function() {
        this._changeAvatarComponent = null;
        this._initGroupStore(this.props.groupId);

        MatrixClientPeg.get().on("Group.myMembership", this._onGroupMyMembership);
    },

    componentWillUnmount: function() {
        MatrixClientPeg.get().removeListener("Group.myMembership", this._onGroupMyMembership);
        this._groupStore.removeAllListeners();
    },

    componentWillReceiveProps: function(newProps) {
        if (this.props.groupId != newProps.groupId) {
            this.setState({
                summary: null,
                error: null,
            }, () => {
                this._initGroupStore(newProps.groupId);
            });
        }
    },

    _onGroupMyMembership: function(group) {
        if (group.groupId !== this.props.groupId) return;

        this.setState({membershipBusy: false});
    },

    _initGroupStore: function(groupId) {
        this._groupStore = GroupStoreCache.getGroupStore(MatrixClientPeg.get(), groupId);
        this._groupStore.on('update', () => {
            this.setState({
                summary: this._groupStore.getSummary(),
                error: null,
            });
        });
        this._groupStore.on('error', (err) => {
            this.setState({
                summary: null,
                error: err,
            });
        });
    },

    _onShowRhsClick: function(ev) {
        dis.dispatch({ action: 'show_right_panel' });
    },

    _onEditClick: function() {
        this.setState({
            editing: true,
            profileForm: Object.assign({}, this.state.summary.profile),
        });
    },

    _onCancelClick: function() {
        this.setState({
            editing: false,
            profileForm: null,
        });
    },

    _onNameChange: function(e) {
        const newProfileForm = Object.assign(this.state.profileForm, { name: e.target.value });
        this.setState({
            profileForm: newProfileForm,
        });
    },

    _onShortDescChange: function(e) {
        const newProfileForm = Object.assign(this.state.profileForm, { short_description: e.target.value });
        this.setState({
            profileForm: newProfileForm,
        });
    },

    _onLongDescChange: function(e) {
        const newProfileForm = Object.assign(this.state.profileForm, { long_description: e.target.value });
        this.setState({
            profileForm: newProfileForm,
        });
    },

    _onAvatarSelected: function(ev) {
        const file = ev.target.files[0];
        if (!file) return;

        this.setState({uploadingAvatar: true});
        MatrixClientPeg.get().uploadContent(file).then((url) => {
            const newProfileForm = Object.assign(this.state.profileForm, { avatar_url: url });
            this.setState({
                uploadingAvatar: false,
                profileForm: newProfileForm,
            });
        }).catch((e) => {
            this.setState({uploadingAvatar: false});
            const ErrorDialog = sdk.getComponent("dialogs.ErrorDialog");
            console.error("Failed to upload avatar image", e);
            Modal.createTrackedDialog('Failed to upload image', '', ErrorDialog, {
                title: _t('Error'),
                description: _t('Failed to upload image'),
            });
        }).done();
    },

    _onSaveClick: function() {
        this.setState({saving: true});
        MatrixClientPeg.get().setGroupProfile(this.props.groupId, this.state.profileForm).then((result) => {
            this.setState({
                saving: false,
                editing: false,
                summary: null,
            });
            this._initGroupStore(this.props.groupId);
        }).catch((e) => {
            this.setState({
                saving: false,
            });
            const ErrorDialog = sdk.getComponent("dialogs.ErrorDialog");
            console.error("Failed to save group profile", e);
            Modal.createTrackedDialog('Failed to update group', '', ErrorDialog, {
                title: _t('Error'),
                description: _t('Failed to update group'),
            });
        }).done();
    },

    _onAcceptInviteClick: function() {
        this.setState({membershipBusy: true});
        MatrixClientPeg.get().acceptGroupInvite(this.props.groupId).then(() => {
            // don't reset membershipBusy here: wait for the membership change to come down the sync
        }).catch((e) => {
            this.setState({membershipBusy: false});
            const ErrorDialog = sdk.getComponent("dialogs.ErrorDialog");
            Modal.createTrackedDialog('Error accepting invite', '', ErrorDialog, {
                title: _t("Error"),
                description: _t("Unable to accept invite"),
            });
        });
    },

    _onRejectInviteClick: function() {
        this.setState({membershipBusy: true});
        MatrixClientPeg.get().leaveGroup(this.props.groupId).then(() => {
            // don't reset membershipBusy here: wait for the membership change to come down the sync
        }).catch((e) => {
            this.setState({membershipBusy: false});
            const ErrorDialog = sdk.getComponent("dialogs.ErrorDialog");
            Modal.createTrackedDialog('Error rejecting invite', '', ErrorDialog, {
                title: _t("Error"),
                description: _t("Unable to reject invite"),
            });
        });
    },

    _onLeaveClick: function() {
        const QuestionDialog = sdk.getComponent("dialogs.QuestionDialog");
        Modal.createTrackedDialog('Leave Group', '', QuestionDialog, {
            title: _t("Leave Group"),
            description: _t("Leave %(groupName)s?", {groupName: this.props.groupId}),
            button: _t("Leave"),
            danger: true,
            onFinished: (confirmed) => {
                if (!confirmed) return;

                this.setState({membershipBusy: true});
                MatrixClientPeg.get().leaveGroup(this.props.groupId).then(() => {
                    // don't reset membershipBusy here: wait for the membership change to come down the sync
                }).catch((e) => {
                    this.setState({membershipBusy: false});
                    const ErrorDialog = sdk.getComponent("dialogs.ErrorDialog");
                    Modal.createTrackedDialog('Error leaving room', '', ErrorDialog, {
                        title: _t("Error"),
                        description: _t("Unable to leave room"),
                    });
                });
            },
        });
    },

    _onPubliciseOffClick: function() {
        this._setPublicity(false);
    },

    _onPubliciseOnClick: function() {
        this._setPublicity(true);
    },

    _setPublicity: function(publicity) {
        this.setState({
            publicityBusy: true,
        });
        this._groupStore.setGroupPublicity(publicity).then(() => {
            this.setState({
                publicityBusy: false,
            });
        });
    },

    _getFeaturedRoomsNode: function() {
        const summary = this.state.summary;

        const defaultCategoryRooms = [];
        const categoryRooms = {};
        summary.rooms_section.rooms.forEach((r) => {
            if (r.category_id === null) {
                defaultCategoryRooms.push(r);
            } else {
                let list = categoryRooms[r.category_id];
                if (list === undefined) {
                    list = [];
                    categoryRooms[r.category_id] = list;
                }
                list.push(r);
            }
        });

        const defaultCategoryNode = <CategoryRoomList
            rooms={defaultCategoryRooms}
            groupId={this.props.groupId}
            editing={this.state.editing} />;
        const categoryRoomNodes = Object.keys(categoryRooms).map((catId) => {
            const cat = summary.rooms_section.categories[catId];
            return <CategoryRoomList
                key={catId}
                rooms={categoryRooms[catId]}
                category={cat}
                groupId={this.props.groupId}
                editing={this.state.editing} />;
        });

        return <div className="mx_GroupView_featuredThings">
            <div className="mx_GroupView_featuredThings_header">
                { _t('Featured Rooms:') }
            </div>
            { defaultCategoryNode }
            { categoryRoomNodes }
        </div>;
    },

    _getFeaturedUsersNode: function() {
        const summary = this.state.summary;

        const noRoleUsers = [];
        const roleUsers = {};
        summary.users_section.users.forEach((u) => {
            if (u.role_id === null) {
                noRoleUsers.push(u);
            } else {
                let list = roleUsers[u.role_id];
                if (list === undefined) {
                    list = [];
                    roleUsers[u.role_id] = list;
                }
                list.push(u);
            }
        });

        const noRoleNode = <RoleUserList
            users={noRoleUsers}
            groupId={this.props.groupId}
            editing={this.state.editing} />;
        const roleUserNodes = Object.keys(roleUsers).map((roleId) => {
            const role = summary.users_section.roles[roleId];
            return <RoleUserList
                key={roleId}
                users={roleUsers[roleId]}
                role={role}
                groupId={this.props.groupId}
                editing={this.state.editing} />;
        });

        return <div className="mx_GroupView_featuredThings">
            <div className="mx_GroupView_featuredThings_header">
                { _t('Featured Users:') }
            </div>
            { noRoleNode }
            { roleUserNodes }
        </div>;
    },

    _getMembershipSection: function() {
        const Spinner = sdk.getComponent("elements.Spinner");

        const group = MatrixClientPeg.get().getGroup(this.props.groupId);
        if (!group) return null;

        if (group.myMembership === 'invite') {
            if (this.state.membershipBusy) {
                return <div className="mx_GroupView_membershipSection">
                    <Spinner />
                </div>;
            }

            return <div className="mx_GroupView_membershipSection mx_GroupView_membershipSection_invited">
                <div className="mx_GroupView_membershipSection_description">
                    { _t("%(inviter)s has invited you to join this group", {inviter: group.inviter.userId}) }
                </div>
                <div className="mx_GroupView_membership_buttonContainer">
                    <AccessibleButton className="mx_GroupView_textButton mx_RoomHeader_textButton"
                        onClick={this._onAcceptInviteClick}
                    >
                        { _t("Accept") }
                    </AccessibleButton>
                    <AccessibleButton className="mx_GroupView_textButton mx_RoomHeader_textButton"
                        onClick={this._onRejectInviteClick}
                    >
                        { _t("Decline") }
                    </AccessibleButton>
                </div>
            </div>;
        } else if (group.myMembership === 'join') {
            let youAreAMemberText = _t("You are a member of this group");
            if (this.state.summary.user && this.state.summary.user.is_privileged) {
                youAreAMemberText = _t("You are an administrator of this group");
            }

            let publicisedButton;
            if (this.state.publicityBusy) {
                publicisedButton = <Spinner />;
            }

            let publicisedSection;
            if (this.state.summary.user && this.state.summary.user.is_publicised) {
                if (!this.state.publicityBusy) {
                    publicisedButton = <AccessibleButton className="mx_GroupView_textButton mx_RoomHeader_textButton"
                            onClick={this._onPubliciseOffClick}
                        >
                            { _t("Unpublish") }
                        </AccessibleButton>;
                }
                publicisedSection = <div className="mx_GroupView_membershipSubSection">
                    { _t("This group is published on your profile") }
                    <div className="mx_GroupView_membership_buttonContainer">
                        { publicisedButton }
                    </div>
                </div>;
            } else {
                if (!this.state.publicityBusy) {
                    publicisedButton = <AccessibleButton className="mx_GroupView_textButton mx_RoomHeader_textButton"
                        onClick={this._onPubliciseOnClick}
                    >
                        { _t("Publish") }
                    </AccessibleButton>;
                }
                publicisedSection = <div className="mx_GroupView_membershipSubSection">
                    { _t("This group is not published on your profile") }
                    <div className="mx_GroupView_membership_buttonContainer">
                        { publicisedButton }
                    </div>
                </div>;
            }

            return <div className="mx_GroupView_membershipSection mx_GroupView_membershipSection_joined">
                <div className="mx_GroupView_membershipSubSection">
                    <div className="mx_GroupView_membershipSection_description">
                        { youAreAMemberText }
                    </div>
                    <div className="mx_GroupView_membership_buttonContainer">
                        <AccessibleButton className="mx_GroupView_textButton mx_RoomHeader_textButton"
                            onClick={this._onLeaveClick}
                        >
                            { _t("Leave") }
                        </AccessibleButton>
                    </div>
                </div>
                { publicisedSection }
            </div>;
        }

        return null;
    },

    render: function() {
        const GroupAvatar = sdk.getComponent("avatars.GroupAvatar");
        const Loader = sdk.getComponent("elements.Spinner");
        const TintableSvg = sdk.getComponent("elements.TintableSvg");

        if (this.state.summary === null && this.state.error === null || this.state.saving) {
            return <Loader />;
        } else if (this.state.summary) {
            const summary = this.state.summary;

            let avatarNode;
            let nameNode;
            let shortDescNode;
            let roomBody;
            const rightButtons = [];
            const headerClasses = {
                mx_GroupView_header: true,
            };
            if (this.state.editing) {
                let avatarImage;
                if (this.state.uploadingAvatar) {
                    avatarImage = <Loader />;
                } else {
                    const GroupAvatar = sdk.getComponent('avatars.GroupAvatar');
                    avatarImage = <GroupAvatar groupId={this.props.groupId}
                        groupAvatarUrl={this.state.profileForm.avatar_url}
                        width={48} height={48} resizeMethod='crop'
                    />;
                }

                avatarNode = (
                    <div className="mx_GroupView_avatarPicker">
                        <label htmlFor="avatarInput" className="mx_GroupView_avatarPicker_label">
                            { avatarImage }
                        </label>
                        <div className="mx_GroupView_avatarPicker_edit">
                            <label htmlFor="avatarInput" className="mx_GroupView_avatarPicker_label">
                                <img src="img/camera.svg"
                                    alt={_t("Upload avatar")} title={_t("Upload avatar")}
                                    width="17" height="15" />
                            </label>
                            <input id="avatarInput" className="mx_GroupView_uploadInput" type="file" onChange={this._onAvatarSelected} />
                        </div>
                    </div>
                );
                nameNode = <input type="text"
                    value={this.state.profileForm.name}
                    onChange={this._onNameChange}
                    placeholder={_t('Group Name')}
                    tabIndex="1"
                />;
                shortDescNode = <input type="text"
                    value={this.state.profileForm.short_description}
                    onChange={this._onShortDescChange}
                    placeholder={_t('Description')}
                    tabIndex="2"
                />;
                rightButtons.push(
                    <AccessibleButton className="mx_GroupView_textButton mx_RoomHeader_textButton"
                        onClick={this._onSaveClick} key="_saveButton"
                    >
                        { _t('Save') }
                    </AccessibleButton>,
                );
                rightButtons.push(
                    <AccessibleButton className="mx_RoomHeader_cancelButton" onClick={this._onCancelClick} key="_cancelButton">
                        <img src="img/cancel.svg" className="mx_filterFlipColor"
                            width="18" height="18" alt={_t("Cancel")} />
                    </AccessibleButton>,
                );
                roomBody = <div>
                    <textarea className="mx_GroupView_editLongDesc" value={this.state.profileForm.long_description}
                        onChange={this._onLongDescChange}
                        tabIndex="3"
                    />
                    { this._getFeaturedRoomsNode() }
                    { this._getFeaturedUsersNode() }
                </div>;
            } else {
                const groupAvatarUrl = summary.profile ? summary.profile.avatar_url : null;
                avatarNode = <GroupAvatar
                    groupId={this.props.groupId}
                    groupAvatarUrl={groupAvatarUrl}
                    width={48} height={48}
                />;
                if (summary.profile && summary.profile.name) {
                    nameNode = <div>
                        <span>{ summary.profile.name }</span>
                        <span className="mx_GroupView_header_groupid">
                            ({ this.props.groupId })
                        </span>
                    </div>;
                } else {
                    nameNode = <span>{ this.props.groupId }</span>;
                }
                shortDescNode = <span>{ summary.profile.short_description }</span>;

                let description = null;
                if (summary.profile && summary.profile.long_description) {
                    description = sanitizedHtmlNode(summary.profile.long_description);
                }
                roomBody = <div>
                    { this._getMembershipSection() }
                    <div className="mx_GroupView_groupDesc">{ description }</div>
                    { this._getFeaturedRoomsNode() }
                    { this._getFeaturedUsersNode() }
                </div>;
                if (summary.user && summary.user.is_privileged) {
                    rightButtons.push(
                        <AccessibleButton className="mx_GroupHeader_button"
                            onClick={this._onEditClick} title={_t("Edit Group")} key="_editButton"
                        >
                            <TintableSvg src="img/icons-settings-room.svg" width="16" height="16" />
                        </AccessibleButton>,
                    );
                }
                if (this.props.collapsedRhs) {
                    rightButtons.push(
                        <AccessibleButton className="mx_GroupHeader_button"
                            onClick={this._onShowRhsClick} title={_t('Show panel')} key="_maximiseButton"
                        >
                            <TintableSvg src="img/maximise.svg" width="10" height="16" />
                        </AccessibleButton>,
                    );
                }

                headerClasses.mx_GroupView_header_view = true;
            }

            return (
                <div className="mx_GroupView">
                    <div className={classnames(headerClasses)}>
                        <div className="mx_GroupView_header_leftCol">
                            <div className="mx_GroupView_header_avatar">
                                { avatarNode }
                            </div>
                            <div className="mx_GroupView_header_info">
                                <div className="mx_GroupView_header_name">
                                    { nameNode }
                                </div>
                                <div className="mx_GroupView_header_shortDesc">
                                    { shortDescNode }
                                </div>
                            </div>
                        </div>
                        <div className="mx_GroupView_header_rightCol">
                            { rightButtons }
                        </div>
                    </div>
                    { roomBody }
                </div>
            );
        } else if (this.state.error) {
            if (this.state.error.httpStatus === 404) {
                return (
                    <div className="mx_GroupView_error">
                        Group { this.props.groupId } not found
                    </div>
                );
            } else {
                let extraText;
                if (this.state.error.errcode === 'M_UNRECOGNIZED') {
                    extraText = <div>{ _t('This Home server does not support groups') }</div>;
                }
                return (
                    <div className="mx_GroupView_error">
                        Failed to load { this.props.groupId }
                        { extraText }
                    </div>
                );
            }
        } else {
            console.error("Invalid state for GroupView");
            return <div />;
        }
    },
});