import type GroupRepresentation from "@keycloak/keycloak-admin-client/lib/defs/groupRepresentation";
import RealmRepresentation from "@keycloak/keycloak-admin-client/lib/defs/realmRepresentation";
import type { UserProfileMetadata } from "@keycloak/keycloak-admin-client/lib/defs/userProfileMetadata";
import { AlertVariant, PageSection } from "@patternfly/react-core";
import { useState } from "react";
import { useForm } from "react-hook-form";
import { useTranslation } from "react-i18next";
import { useNavigate } from "react-router-dom";

import { adminClient } from "../admin-client";
import { useAlerts } from "../components/alert/Alerts";
import { KeycloakSpinner } from "../components/keycloak-spinner/KeycloakSpinner";
import { ViewHeader } from "../components/view-header/ViewHeader";
import { useRealm } from "../context/realm-context/RealmContext";
import { useFetch } from "../utils/useFetch";
import useIsFeatureEnabled, { Feature } from "../utils/useIsFeatureEnabled";
import { UserForm } from "./UserForm";
import {
  isUserProfileError,
  userProfileErrorToString,
} from "./UserProfileFields";
import { UserFormFields, toUserRepresentation } from "./form-state";
import { toUser } from "./routes/User";

import "./user-section.css";

export default function CreateUser() {
  const { t } = useTranslation();
  const { addAlert, addError } = useAlerts();
  const navigate = useNavigate();
  const { realm: realmName } = useRealm();
  const isFeatureEnabled = useIsFeatureEnabled();
  const form = useForm<UserFormFields>({ mode: "onChange" });
  const [addedGroups, setAddedGroups] = useState<GroupRepresentation[]>([]);
  const [realm, setRealm] = useState<RealmRepresentation>();
  const [userProfileMetadata, setUserProfileMetadata] =
    useState<UserProfileMetadata>();

  useFetch(
    () =>
      Promise.all([
        adminClient.realms.findOne({ realm: realmName }),
        adminClient.users.getProfileMetadata({ realm: realmName }),
      ]),
    ([realm, userProfileMetadata]) => {
      if (!realm) {
        throw new Error(t("notFound"));
      }

      setRealm(realm);

      const isUserProfileEnabled =
        isFeatureEnabled(Feature.DeclarativeUserProfile) &&
        realm.attributes?.userProfileEnabled === "true";

      setUserProfileMetadata(
        isUserProfileEnabled ? userProfileMetadata : undefined,
      );
    },
    [],
  );

  const save = async (data: UserFormFields) => {
    try {
      const createdUser = await adminClient.users.create({
        ...toUserRepresentation(data),
        groups: addedGroups.map((group) => group.path!),
        enabled: true,
      });

      addAlert(t("userCreated"), AlertVariant.success);
      navigate(
        toUser({ id: createdUser.id, realm: realmName, tab: "settings" }),
      );
    } catch (error) {
      if (isUserProfileError(error)) {
        addError(userProfileErrorToString(error), error);
      } else {
        addError("userCreateError", error);
      }
    }
  };

  if (!realm) {
    return <KeycloakSpinner />;
  }

  return (
    <>
      <ViewHeader
        titleKey={t("createUser")}
        className="kc-username-view-header"
      />
      <PageSection variant="light">
        <UserForm
          form={form}
          realm={realm}
          userProfileMetadata={userProfileMetadata}
          onGroupsUpdate={setAddedGroups}
          save={save}
        />
      </PageSection>
    </>
  );
}