import React, { useEffect, useState } from "react";
import { useHistory, useParams } from "react-router-dom";
import {
  ActionGroup,
  AlertVariant,
  Button,
  FormGroup,
  Tab,
  Tabs,
  TabTitleText,
  TextArea,
  TextInput,
  ValidatedOptions,
} from "@patternfly/react-core";
import { useTranslation } from "react-i18next";
import { Controller, useForm } from "react-hook-form";
import { FormAccess } from "../components/form-access/FormAccess";

import { useAlerts } from "../components/alert/Alerts";
import { useAdminClient, useFetch } from "../context/auth/AdminClient";
import RoleRepresentation from "keycloak-admin/lib/defs/roleRepresentation";
import { RoleAttributes } from "./RoleAttributes";
import "./RealmRolesSection.css";
import { useRealm } from "../context/realm-context/RealmContext";

export const RolesTabs = () => {
  const { t } = useTranslation("roles");
  const { errors, control, setValue } = useForm<RoleRepresentation>();
  const history = useHistory();
  const [name, setName] = useState("");
  const adminClient = useAdminClient();
  const [activeTab, setActiveTab] = useState(0);
  const { realm } = useRealm();

  const { id } = useParams<{ id: string }>();

  const { addAlert } = useAlerts();

  useEffect(() => {
    return useFetch(
      () => adminClient.roles.findOneById({ id }),
      (fetchedRole) => {
        setName(fetchedRole.name!);
        setupForm(fetchedRole);
      }
    );
  }, []);

  const setupForm = (role: RoleRepresentation) => {
    Object.entries(role).map((entry) => {
      setValue(entry[0], entry[1]);
    });
  };

  const save = async (role: RoleRepresentation) => {
    try {
      await adminClient.roles.updateById({ id }, role);
      setupForm(role as RoleRepresentation);
      addAlert(t("roleSaveSuccess"), AlertVariant.success);
    } catch (error) {
      addAlert(`${t("roleSaveError")} '${error}'`, AlertVariant.danger);
    }
  };

  const form = useForm<RoleRepresentation>();

  return (
    <>
      <Tabs
        activeKey={activeTab}
        onSelect={(_, key) => setActiveTab(key as number)}
        isBox
      >
        <Tab eventKey={0} title={<TabTitleText>{t("details")}</TabTitleText>}>
          <FormAccess
            isHorizontal
            onSubmit={form.handleSubmit(save)}
            role="manage-realm"
            className="pf-u-mt-lg"
          >
            <FormGroup
              label={t("roleName")}
              fieldId="kc-name"
              isRequired
              validated={errors.name ? "error" : "default"}
              helperTextInvalid={t("common:required")}
            >
              {name ? (
                <TextInput
                  ref={form.register({ required: true })}
                  type="text"
                  id="kc-name"
                  name="name"
                  isReadOnly
                />
              ) : undefined}
            </FormGroup>
            <FormGroup label={t("description")} fieldId="kc-description">
              <Controller
                name="description"
                defaultValue=""
                control={control}
                rules={{ maxLength: 255 }}
                render={({ onChange, value }) => (
                  <TextArea
                    type="text"
                    validated={
                      errors.description
                        ? ValidatedOptions.error
                        : ValidatedOptions.default
                    }
                    id="kc-role-description"
                    value={value}
                    onChange={onChange}
                  />
                )}
              />
            </FormGroup>
            <ActionGroup>
              <Button variant="primary" type="submit">
                {t("common:save")}
              </Button>
              <Button
                variant="link"
                onClick={() => history.push(`/${realm}/roles`)}
              >
                {t("common:reload")}
              </Button>
            </ActionGroup>
          </FormAccess>
        </Tab>
        <Tab
          eventKey={1}
          title={<TabTitleText>{t("attributes")}</TabTitleText>}
        >
          <RoleAttributes />
          <ActionGroup className="kc-role-attributes__action-group">
            <Button variant="primary" type="submit">
              {t("common:save")}
            </Button>
            <Button
              variant="link"
              onClick={() => history.push(`/${realm}/roles`)}
            >
              {t("common:reload")}
            </Button>
          </ActionGroup>
        </Tab>
      </Tabs>
    </>
  );
};