import React, { useEffect, useState } from "react";
import { PageSection } from "@patternfly/react-core";
import { ViewHeader } from "../components/view-header/ViewHeader";
import { asyncStateFetch, useAdminClient } from "../context/auth/AdminClient";
import { RolesList } from "./RolesList";
import { useErrorHandler } from "react-error-boundary";

export const RealmRolesSection = () => {
  const adminClient = useAdminClient();
  const [listRoles, setListRoles] = useState(false);
  const handleError = useErrorHandler();

  useEffect(() => {
    return asyncStateFetch(
      () => {
        return Promise.all([adminClient.roles.find()]);
      },

      (response) => {
        setListRoles(!(response[0] && response[0].length > 0));
      },
      handleError
    );
  }, []);

  const loader = async (first?: number, max?: number, search?: string) => {
    const params: { [name: string]: string | number } = {
      first: first!,
      max: max!,
    };

    const searchParam = search || "";

    if (searchParam) {
      params.search = searchParam;
    }

    if (listRoles) {
      return [];
    }

    return await adminClient.roles.find(params);
  };

  return (
    <>
      <ViewHeader titleKey="roles:title" subKey="roles:roleExplain" />
      <PageSection variant="light" padding={{ default: "noPadding" }}>
        <RolesList loader={loader} />
      </PageSection>
    </>
  );
};