/*
Copyright 2021 The Matrix.org Foundation C.I.C.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

import React, {useContext, useState} from "react";
import classNames from "classnames";
import {EventType, RoomType, RoomCreateTypeField} from "matrix-js-sdk/src/@types/event";

import {_t} from "../../../languageHandler";
import AccessibleTooltipButton from "../elements/AccessibleTooltipButton";
import {ChevronFace, ContextMenu} from "../../structures/ContextMenu";
import FormButton from "../elements/FormButton";
import createRoom, {IStateEvent, Preset} from "../../../createRoom";
import MatrixClientContext from "../../../contexts/MatrixClientContext";
import SpaceBasicSettings from "./SpaceBasicSettings";
import AccessibleButton from "../elements/AccessibleButton";
import FocusLock from "react-focus-lock";

const SpaceCreateMenuType = ({ title, description, className, onClick }) => {
    return (
        <AccessibleButton className={classNames("mx_SpaceCreateMenuType", className)} onClick={onClick}>
            <h3>{ title }</h3>
            <span>{ description }</span>
        </AccessibleButton>
    );
};

enum Visibility {
    Public,
    Private,
}

const SpaceCreateMenu = ({ onFinished }) => {
    const cli = useContext(MatrixClientContext);
    const [visibility, setVisibility] = useState<Visibility>(null);
    const [name, setName] = useState("");
    const [avatar, setAvatar] = useState<File>(null);
    const [topic, setTopic] = useState<string>("");
    const [busy, setBusy] = useState<boolean>(false);

    const onSpaceCreateClick = async () => {
        if (busy) return;
        setBusy(true);
        const initialState: IStateEvent[] = [
            {
                type: EventType.RoomHistoryVisibility,
                content: {
                    "history_visibility": visibility === Visibility.Public ? "world_readable" : "invited",
                },
            },
        ];
        if (avatar) {
            const url = await cli.uploadContent(avatar);

            initialState.push({
                type: EventType.RoomAvatar,
                content: { url },
            });
        }
        if (topic) {
            initialState.push({
                type: EventType.RoomTopic,
                content: { topic },
            });
        }

        try {
            await createRoom({
                createOpts: {
                    preset: visibility === Visibility.Public ? Preset.PublicChat : Preset.PrivateChat,
                    name,
                    creation_content: {
                        // Based on MSC1840
                        [RoomCreateTypeField]: RoomType.Space,
                    },
                    initial_state: initialState,
                    power_level_content_override: {
                        // Only allow Admins to write to the timeline to prevent hidden sync spam
                        events_default: 100,
                    },
                },
                spinner: false,
                encryption: false,
                andView: true,
                inlineErrors: true,
            });

            onFinished();
        } catch (e) {
            console.error(e);
        }
    };

    let body;
    if (visibility === null) {
        body = <React.Fragment>
            <h2>{ _t("Create a space") }</h2>
            <p>{ _t("Spaces are new ways to group rooms and people. " +
                "To join an existing space you'll need an invite.") }</p>

            <SpaceCreateMenuType
                title={_t("Public")}
                description={_t("Open space for anyone, best for communities")}
                className="mx_SpaceCreateMenuType_public"
                onClick={() => setVisibility(Visibility.Public)}
            />
            <SpaceCreateMenuType
                title={_t("Private")}
                description={_t("Invite only, best for yourself or teams")}
                className="mx_SpaceCreateMenuType_private"
                onClick={() => setVisibility(Visibility.Private)}
            />

            <p>{ _t("You can change this later") }</p>
        </React.Fragment>;
    } else {
        body = <React.Fragment>
            <AccessibleTooltipButton
                className="mx_SpaceCreateMenu_back"
                onClick={() => setVisibility(null)}
                title={_t("Go back")}
            />

            <h2>
                {
                    visibility === Visibility.Public ? _t("Your public space") : _t("Your private space")
                }
            </h2>
            <p>
                {
                    _t("Add some details to help people recognise it.")
                } {
                    _t("You can change these anytime.")
                }
            </p>

            <SpaceBasicSettings setAvatar={setAvatar} name={name} setName={setName} topic={topic} setTopic={setTopic} />

            <FormButton
                label={busy ? _t("Creating...") : _t("Create")}
                onClick={onSpaceCreateClick}
                disabled={!name && !busy}
            />
        </React.Fragment>;
    }

    return <ContextMenu
        left={72}
        top={62}
        chevronOffset={0}
        chevronFace={ChevronFace.None}
        onFinished={onFinished}
        wrapperClassName="mx_SpaceCreateMenu_wrapper"
        managed={false}
    >
        <FocusLock returnFocus={true}>
            { body }
        </FocusLock>
    </ContextMenu>;
}

export default SpaceCreateMenu;