/*
Copyright 2023 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 { ThreepidMedium, IPusher } from "matrix-js-sdk/src/matrix";
import React, { useCallback, useMemo } from "react";

import { useMatrixClientContext } from "../../../../contexts/MatrixClientContext";
import { Action } from "../../../../dispatcher/actions";
import dispatcher from "../../../../dispatcher/dispatcher";
import { usePushers } from "../../../../hooks/usePushers";
import { useThreepids } from "../../../../hooks/useThreepids";
import { _t } from "../../../../languageHandler";
import SdkConfig from "../../../../SdkConfig";
import { UserTab } from "../../dialogs/UserTab";
import AccessibleButton from "../../elements/AccessibleButton";
import LabelledCheckbox from "../../elements/LabelledCheckbox";
import { SettingsIndent } from "../shared/SettingsIndent";
import SettingsSubsection, { SettingsSubsectionText } from "../shared/SettingsSubsection";

function generalTabButton(content: string): JSX.Element {
    return (
        <AccessibleButton
            kind="link_inline"
            onClick={() => {
                dispatcher.dispatch({
                    action: Action.ViewUserSettings,
                    initialTabId: UserTab.General,
                });
            }}
        >
            {content}
        </AccessibleButton>
    );
}

export function NotificationPusherSettings(): JSX.Element {
    const EmailPusherTemplate: Omit<IPusher, "pushkey" | "device_display_name" | "append"> = useMemo(
        () => ({
            kind: "email",
            app_id: "m.email",
            app_display_name: _t("notifications|email_pusher_app_display_name"),
            lang: navigator.language,
            data: {
                brand: SdkConfig.get().brand,
            },
        }),
        [],
    );

    const cli = useMatrixClientContext();
    const [pushers, refreshPushers] = usePushers(cli);
    const [threepids, refreshThreepids] = useThreepids(cli);

    const setEmailEnabled = useCallback(
        (email: string, enabled: boolean) => {
            if (enabled) {
                cli.setPusher({
                    ...EmailPusherTemplate,
                    pushkey: email,
                    device_display_name: email,
                    // We always append for email pushers since we don't want to stop other
                    // accounts notifying to the same email address
                    append: true,
                }).catch((err) => console.error(err));
            } else {
                const pusher = pushers.find((p) => p.kind === "email" && p.pushkey === email);
                if (pusher) {
                    cli.removePusher(pusher.pushkey, pusher.app_id).catch((err) => console.error(err));
                }
            }
            refreshThreepids();
            refreshPushers();
        },
        [EmailPusherTemplate, cli, pushers, refreshPushers, refreshThreepids],
    );

    const notificationTargets = pushers.filter((it) => it.kind !== "email");

    return (
        <>
            <SettingsSubsection
                className="mx_NotificationPusherSettings"
                heading={_t("settings|notifications|email_section")}
            >
                <SettingsSubsectionText className="mx_NotificationPusherSettings_description">
                    {_t("settings|notifications|email_description")}
                </SettingsSubsectionText>
                <div className="mx_SettingsSubsection_description mx_NotificationPusherSettings_detail">
                    <SettingsSubsectionText>
                        {_t("settings|notifications|email_select", {}, { button: generalTabButton })}
                    </SettingsSubsectionText>
                </div>
                <SettingsIndent>
                    {threepids
                        .filter((t) => t.medium === ThreepidMedium.Email)
                        .map((email) => (
                            <LabelledCheckbox
                                key={email.address}
                                label={email.address}
                                value={pushers.find((it) => it.pushkey === email.address) !== undefined}
                                onChange={(value) => setEmailEnabled(email.address, value)}
                            />
                        ))}
                </SettingsIndent>
            </SettingsSubsection>
            {notificationTargets.length > 0 && (
                <SettingsSubsection heading={_t("settings|notifications|push_targets")}>
                    <ul>
                        {pushers
                            .filter((it) => it.kind !== "email")
                            .map((pusher) => (
                                <li key={pusher.pushkey}>{pusher.device_display_name || pusher.app_display_name}</li>
                            ))}
                    </ul>
                </SettingsSubsection>
            )}
        </>
    );
}