import axios from 'axios';
import { Form, Formik } from 'formik';
import { useRouter } from 'next/router';
import React from 'react';
import { defineMessages, useIntl } from 'react-intl';
import { useToasts } from 'react-toast-notifications';
import useSWR from 'swr';
import { useUser } from '../../../../hooks/useUser';
import globalMessages from '../../../../i18n/globalMessages';
import Error from '../../../../pages/_error';
import Alert from '../../../Common/Alert';
import Button from '../../../Common/Button';
import LoadingSpinner from '../../../Common/LoadingSpinner';
import PageTitle from '../../../Common/PageTitle';
import PermissionEdit from '../../../PermissionEdit';

const messages = defineMessages({
  toastSettingsSuccess: 'Permissions saved successfully!',
  toastSettingsFailure: 'Something went wrong while saving settings.',
  permissions: 'Permissions',
  unauthorizedDescription: 'You cannot modify your own permissions.',
});

const UserPermissions: React.FC = () => {
  const intl = useIntl();
  const { addToast } = useToasts();
  const router = useRouter();
  const { user: currentUser } = useUser();
  const { user, mutate } = useUser({ id: Number(router.query.userId) });
  const { data, error, revalidate } = useSWR<{ permissions?: number }>(
    user ? `/api/v1/user/${user?.id}/settings/permissions` : null
  );

  if (!data && !error) {
    return <LoadingSpinner />;
  }

  if (!data) {
    return <Error statusCode={500} />;
  }

  if (currentUser?.id !== 1 && currentUser?.id === user?.id) {
    return (
      <>
        <div className="mb-6">
          <h3 className="heading">
            {intl.formatMessage(messages.permissions)}
          </h3>
        </div>
        <Alert
          title={intl.formatMessage(messages.unauthorizedDescription)}
          type="error"
        />
      </>
    );
  }

  return (
    <>
      <PageTitle
        title={[
          intl.formatMessage(messages.permissions),
          intl.formatMessage(globalMessages.usersettings),
          user?.displayName,
        ]}
      />
      <div className="mb-6">
        <h3 className="heading">{intl.formatMessage(messages.permissions)}</h3>
      </div>
      <Formik
        initialValues={{
          currentPermissions: data?.permissions,
        }}
        enableReinitialize
        onSubmit={async (values) => {
          try {
            await axios.post(`/api/v1/user/${user?.id}/settings/permissions`, {
              permissions: values.currentPermissions ?? 0,
            });

            addToast(intl.formatMessage(messages.toastSettingsSuccess), {
              autoDismiss: true,
              appearance: 'success',
            });
          } catch (e) {
            addToast(intl.formatMessage(messages.toastSettingsFailure), {
              autoDismiss: true,
              appearance: 'error',
            });
          } finally {
            revalidate();
            mutate();
          }
        }}
      >
        {({ isSubmitting, setFieldValue, values }) => {
          return (
            <Form className="section">
              <div className="max-w-3xl">
                <PermissionEdit
                  actingUser={currentUser}
                  currentUser={user}
                  currentPermission={values.currentPermissions ?? 0}
                  onUpdate={(newPermission) =>
                    setFieldValue('currentPermissions', newPermission)
                  }
                />
              </div>
              <div className="actions">
                <div className="flex justify-end">
                  <span className="inline-flex ml-3 rounded-md shadow-sm">
                    <Button
                      buttonType="primary"
                      type="submit"
                      disabled={isSubmitting}
                    >
                      {isSubmitting
                        ? intl.formatMessage(globalMessages.saving)
                        : intl.formatMessage(globalMessages.save)}
                    </Button>
                  </span>
                </div>
              </div>
            </Form>
          );
        }}
      </Formik>
    </>
  );
};

export default UserPermissions;