import React, { lazy, Suspense } from "react";
import Fallback from "../../dist/login";
import type { KcContext } from "./kcContext";
import { useI18n } from "./i18n";
import { useDownloadTerms } from "../../dist/login/lib/useDownloadTerms";
import tos_en_url from "./tos_en.md";
import tos_fr_url from "./tos_fr.md";
import Template from "../../dist/login/Template";
import UserProfileFormFields from "../../dist/login/UserProfileFormFields";

export default function KcApp(props: { kcContext: KcContext }) {
    const { kcContext } = props;

    const i18n = useI18n({ kcContext });

    useDownloadTerms({
        kcContext: kcContext as any,
        downloadTermMarkdown: async ({ currentLanguageTag }) => {
            const resource = (() => {
                switch (currentLanguageTag) {
                    case "fr":
                        return tos_fr_url;
                    default:
                        return tos_en_url;
                }
            })();

            // webpack5 (used via storybook) loads markdown as string, not url
            if (resource.includes("\n")) return resource;

            const response = await fetch(resource);
            return response.text();
        }
    });

    if (i18n === null) {
        return null;
    }

    return (
        <Suspense>
            {(() => {
                switch (kcContext.pageId) {
                    default:
                        return (
                            <Fallback
                                {...{
                                    kcContext,
                                    i18n,
                                    Template,
                                    UserProfileFormFields
                                }}
                                doUseDefaultCss={true}
                            />
                        );
                }
            })()}
        </Suspense>
    );
}