/*
 * Copyright (C) 2021 Red Hat, Inc.
 * SPDX-License-Identifier: LGPL-2.1-or-later
 */
import '../lib/patternfly/patternfly-6-cockpit.scss';
import "./anaconda/network-anaconda.scss";
import cockpit from "cockpit";
import 'cockpit-dark-theme'; // once per page
import React, { useRef } from 'react';
import { createRoot } from "react-dom/client";

import { Button } from "@patternfly/react-core/dist/esm/components/Button/index.js";
import { ExclamationCircleIcon } from "@patternfly/react-icons";

import { EmptyStatePanel } from "cockpit-components-empty-state.jsx";
import { ModelContext } from './model-context.jsx';
import { NetworkInterfacePage } from './network-interface.jsx';
import { NetworkPage } from './network-main.jsx';
import { UsageMonitor } from './helpers.js';

import * as service from 'service.js';
import { init as initDialogs, NetworkManagerModel } from './interfaces.js';
import { superuser } from 'superuser';
import { PlotState } from 'plot';

import { useObject, useEvent, usePageLocation } from "hooks";
import { WithDialogs } from "dialogs.jsx";
import { AnacondaNetworkPage } from "./anaconda/anaconda-main";
import { in_anaconda_mode } from "utils";

const _ = cockpit.gettext;

const App = () => {
    const nmService = useObject(() => service.proxy("NetworkManager"),
                                null,
                                []);
    useEvent(nmService, "changed");

    const model = useObject(() => new NetworkManagerModel(), null, []);
    useEvent(model, "changed");

    const nmRunning_ref = useRef(undefined);
    useEvent(model.client, "owner", (event, owner) => { nmRunning_ref.current = owner !== null });

    useEvent(superuser, "changed");

    if (model.curtain === 'testing' || model.curtain === 'restoring') {
        return <EmptyStatePanel loading title={model.curtain === 'testing' ? _("Testing connection") : _("Restoring connection")} />;
    }

    if (model.ready === undefined)
        return <EmptyStatePanel loading />;

    const anaconda_mode = in_anaconda_mode();

    // No services page in anaconda mode
    const emptyStateSecondary = anaconda_mode
        ? null
        : (<Button component="a"
                    variant="secondary"
                    onClick={() => cockpit.jump("/system/services#/NetworkManager.service", cockpit.transport.host)}>
            {_("Troubleshoot…")}
        </Button>);

    /* Show EmptyStatePanel when nm is not running */
    if (!nmRunning_ref.current) {
        if (nmService.enabled) {
            return (
                <div id="networking-nm-crashed">
                    <EmptyStatePanel icon={ ExclamationCircleIcon }
                                     title={ _("NetworkManager is not running") }
                                     action={nmService.exists ? _("Start service") : null}
                                     onAction={ nmService.start }
                                     secondary={emptyStateSecondary}
                    />
                </div>
            );
        } else if (!nmService.exists) {
            return (
                <div id="networking-nm-not-found">
                    <EmptyStatePanel icon={ ExclamationCircleIcon }
                                     title={ _("NetworkManager is not installed") } />

                </div>
            );
        } else {
            return (
                <div id="networking-nm-disabled">
                    <EmptyStatePanel icon={ ExclamationCircleIcon }
                                     title={ _("Network devices and graphs require NetworkManager") }
                                     action={nmService.exists ? _("Enable service") : null}
                                     onAction={() => {
                                         nmService.enable();
                                         nmService.start();
                                     }} />

                </div>
            );
        }
    }

    if (anaconda_mode) {
        return (
            <ModelContext.Provider value={model}>
                <WithDialogs key="networking-anaconda">
                    <AnacondaNetworkPage privileged={superuser.allowed}
                                         operationInProgress={model.operationInProgress}
                                         interfaces={model.list_interfaces()} />
                </WithDialogs>
            </ModelContext.Provider>
        );
    }

    return (
        <CockpitNetworkPage model={model} />
    );
};

const CockpitNetworkPage = ({ model }) => {
    const { path } = usePageLocation();

    const usage_monitor = useObject(() => new UsageMonitor(), null, []);
    const plot_state_main = useObject(() => new PlotState(), null, []);
    const plot_state_iface = useObject(() => new PlotState(), null, []);

    const interfaces = model.list_interfaces();

    /* At this point NM is running and the model is ready */
    if (path.length === 0) {
        return (
            <ModelContext.Provider value={model}>
                <WithDialogs key="networking">
                    <NetworkPage privileged={superuser.allowed}
                                 operationInProgress={model.operationInProgress}
                                 usage_monitor={usage_monitor}
                                 plot_state={plot_state_main}
                                 interfaces={interfaces} />
                </WithDialogs>
            </ModelContext.Provider>
        );
    } else if (path.length === 1) {
        const iface = interfaces.find(iface => iface.Name === path[0]);

        if (iface) {
            return (
                <ModelContext.Provider value={model}>
                    <WithDialogs key="networking-interface">
                        <NetworkInterfacePage privileged={superuser.allowed}
                                              operationInProgress={model.operationInProgress}
                                              usage_monitor={usage_monitor}
                                              plot_state={plot_state_iface}
                                              interfaces={interfaces}
                                              iface={iface} />
                    </WithDialogs>
                </ModelContext.Provider>
            );
        } else {
            return (
                <EmptyStatePanel icon={ ExclamationCircleIcon }
                                 title={cockpit.format(_("Network interface '$0' not found"), path[0])}
                                 action={_("Return to overview page")}
                                 actionVariant="link"
                                 onAction={() => cockpit.location.go("/")}
                />
            );
        }
    }

    return null;
};

function init() {
    initDialogs();
    const root = createRoot(document.getElementById("network-page"));
    root.render(<App />);
}

document.addEventListener("DOMContentLoaded", init);