/*
Copyright 2024 New Vector Ltd.
Copyright 2021-2023 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, { useState } from "react";
import { Room, EventType, GuestAccess, HistoryVisibility, JoinRule, MatrixClient } from "matrix-js-sdk/src/matrix";

import { _t } from "../../../languageHandler";
import AccessibleButton from "../elements/AccessibleButton";
import AliasSettings from "../room_settings/AliasSettings";
import { useStateToggle } from "../../../hooks/useStateToggle";
import LabelledToggleSwitch from "../elements/LabelledToggleSwitch";
import { useLocalEcho } from "../../../hooks/useLocalEcho";
import JoinRuleSettings from "../settings/JoinRuleSettings";
import { useRoomState } from "../../../hooks/useRoomState";
import SettingsFieldset from "../settings/SettingsFieldset";
import { useAsyncMemo } from "../../../hooks/useAsyncMemo";
import { SettingsSection } from "../settings/shared/SettingsSection";
import SettingsTab from "../settings/tabs/SettingsTab";

interface IProps {
    matrixClient: MatrixClient;
    space: Room;
    closeSettingsFn(): void;
}

const SpaceSettingsVisibilityTab: React.FC<IProps> = ({ matrixClient: cli, space, closeSettingsFn }) => {
    const [error, setError] = useState("");
    const serverSupportsExploringSpaces = useAsyncMemo<boolean>(
        async (): Promise<boolean> => {
            return cli.isVersionSupported("v1.4").then((supported) => {
                return supported || cli.doesServerSupportUnstableFeature("org.matrix.msc3827.stable");
            });
        },
        [cli],
        false,
    );

    const userId = cli.getUserId()!;

    const joinRule = useRoomState(space, (state) => state.getJoinRule());
    const [guestAccessEnabled, setGuestAccessEnabled] = useLocalEcho<boolean>(
        () =>
            space.currentState.getStateEvents(EventType.RoomGuestAccess, "")?.getContent()?.guest_access ===
            GuestAccess.CanJoin,
        (guestAccessEnabled) =>
            cli.sendStateEvent(
                space.roomId,
                EventType.RoomGuestAccess,
                {
                    guest_access: guestAccessEnabled ? GuestAccess.CanJoin : GuestAccess.Forbidden,
                },
                "",
            ),
        () => setError(_t("room_settings|visibility|error_update_guest_access")),
    );
    const [historyVisibility, setHistoryVisibility] = useLocalEcho<HistoryVisibility>(
        () =>
            space.currentState.getStateEvents(EventType.RoomHistoryVisibility, "")?.getContent()?.history_visibility ||
            HistoryVisibility.Shared,
        (historyVisibility) =>
            cli.sendStateEvent(
                space.roomId,
                EventType.RoomHistoryVisibility,
                {
                    history_visibility: historyVisibility,
                },
                "",
            ),
        () => setError(_t("room_settings|visibility|error_update_history_visibility")),
    );

    const [showAdvancedSection, toggleAdvancedSection] = useStateToggle();

    const canSetGuestAccess = space.currentState.maySendStateEvent(EventType.RoomGuestAccess, userId);
    const canSetHistoryVisibility = space.currentState.maySendStateEvent(EventType.RoomHistoryVisibility, userId);
    const canSetCanonical = space.currentState.mayClientSendStateEvent(EventType.RoomCanonicalAlias, cli);
    const canonicalAliasEv = space.currentState.getStateEvents(EventType.RoomCanonicalAlias, "");

    let advancedSection;
    if (joinRule === JoinRule.Public) {
        advancedSection = (
            <div>
                <AccessibleButton
                    data-testid="toggle-guest-access-btn"
                    onClick={toggleAdvancedSection}
                    kind="link"
                    className="mx_SettingsTab_showAdvanced"
                    aria-expanded={showAdvancedSection}
                >
                    {showAdvancedSection ? _t("action|hide_advanced") : _t("action|show_advanced")}
                </AccessibleButton>

                {showAdvancedSection && (
                    <div className="mx_SettingsTab_toggleWithDescription">
                        <LabelledToggleSwitch
                            value={guestAccessEnabled}
                            onChange={setGuestAccessEnabled}
                            disabled={!canSetGuestAccess}
                            label={_t("room_settings|visibility|guest_access_label")}
                        />
                        <p>
                            {_t("room_settings|visibility|guest_access_explainer")}
                            <br />
                            {_t("room_settings|visibility|guest_access_explainer_public_space")}
                        </p>
                    </div>
                )}
            </div>
        );
    }

    let addressesSection: JSX.Element | undefined;
    if (space.getJoinRule() === JoinRule.Public) {
        addressesSection = (
            <SettingsSection heading={_t("room_settings|visibility|alias_section")}>
                <AliasSettings
                    roomId={space.roomId}
                    canSetCanonicalAlias={canSetCanonical}
                    canSetAliases={true}
                    canonicalAliasEvent={canonicalAliasEv ?? undefined}
                    hidePublishSetting={!serverSupportsExploringSpaces}
                />
            </SettingsSection>
        );
    }

    return (
        <SettingsTab>
            <SettingsSection heading={_t("room_settings|visibility|title")}>
                {error && (
                    <div data-testid="space-settings-error" className="mx_SpaceRoomView_errorText">
                        {error}
                    </div>
                )}

                <SettingsFieldset
                    data-testid="access-fieldset"
                    legend={_t("room_settings|access|title")}
                    description={_t("room_settings|access|description_space", { spaceName: space.name })}
                >
                    <JoinRuleSettings
                        room={space}
                        onError={(): void => setError(_t("room_settings|visibility|error_failed_save"))}
                        closeSettingsFn={closeSettingsFn}
                    />
                    {advancedSection}
                    <div className="mx_SettingsTab_toggleWithDescription">
                        <LabelledToggleSwitch
                            value={historyVisibility === HistoryVisibility.WorldReadable}
                            onChange={(checked: boolean): void => {
                                setHistoryVisibility(
                                    checked ? HistoryVisibility.WorldReadable : HistoryVisibility.Shared,
                                );
                            }}
                            disabled={!canSetHistoryVisibility}
                            label={_t("room_settings|visibility|history_visibility_anyone_space")}
                        />
                        <p>
                            {_t("room_settings|visibility|history_visibility_anyone_space_description")}
                            <br />
                            <b>{_t("room_settings|visibility|history_visibility_anyone_space_recommendation")}</b>
                        </p>
                    </div>
                </SettingsFieldset>

                {addressesSection}
            </SettingsSection>
        </SettingsTab>
    );
};

export default SpaceSettingsVisibilityTab;