import { useMutation } from '@apollo/client';
import LoadingButton from '@mui/lab/LoadingButton';
import Container from '@mui/material/Container';
import Grid from '@mui/material/Grid';
import Stack from '@mui/material/Stack';
import * as React from 'react';
import { useNavigate, useParams } from 'react-router-dom';

import Form from 'components/Form';
import PageTitle from 'components/PageTitle';
import PermissionCatalogField from 'components/PermissionCatalogField/index.ee';
import TextField from 'components/TextField';
import * as URLS from 'config/urls';
import { UPDATE_ROLE } from 'graphql/mutations/update-role.ee';
import {
  RoleWithComputedPermissions,
  getPermissions,
  getRoleWithComputedPermissions,
} from 'helpers/computePermissions.ee';
import useFormatMessage from 'hooks/useFormatMessage';
import useRole from 'hooks/useRole.ee';

type EditRoleParams = {
  roleId: string;
}

// TODO: introduce interaction feedback upon deletion (successful + failure)
// TODO: introduce loading bar
export default function EditRole(): React.ReactElement {
  const formatMessage = useFormatMessage();
  const [updateRole, { loading }] = useMutation(UPDATE_ROLE);
  const navigate = useNavigate();
  const { roleId } = useParams<EditRoleParams>();
  const { role, loading: roleLoading } = useRole(roleId);

  const handleRoleUpdate = async (roleData: Partial<RoleWithComputedPermissions>) => {
    const newPermissions = getPermissions(roleData.computedPermissions);

    await updateRole({
      variables: {
        input: {
          id: roleId,
          name: roleData.name,
          description: roleData.description,
          permissions: newPermissions,
        }
      },
    });

    navigate(URLS.ROLES);
  };

  if (roleLoading || !role) return <React.Fragment />;

  const roleWithComputedPermissions = getRoleWithComputedPermissions(role);

  return (
    <Container sx={{ py: 3, display: 'flex', justifyContent: 'center' }}>
      <Grid container item xs={12} sm={9} md={8} lg={6}>
        <Grid item xs={12} sx={{ mb: [2, 5] }}>
          <PageTitle>{formatMessage('editRolePage.title')}</PageTitle>
        </Grid>

        <Grid item xs={12} justifyContent="flex-end" sx={{ pt: 5 }}>
          <Form
            defaultValues={roleWithComputedPermissions}
            onSubmit={handleRoleUpdate}
          >
            <Stack direction="column" gap={2}>
              <TextField
                disabled={role.isAdmin}
                required={true}
                name="name"
                label={formatMessage('roleForm.name')}
                fullWidth
              />

              <TextField
                disabled={role.isAdmin}
                name="description"
                label={formatMessage('roleForm.description')}
                fullWidth
              />

              <PermissionCatalogField name='computedPermissions' disabled={role.isAdmin} />

              <LoadingButton
                type="submit"
                variant="contained"
                color="primary"
                sx={{ boxShadow: 2 }}
                loading={loading}
                disabled={role.isAdmin}
              >
                {formatMessage('editRole.submit')}
              </LoadingButton>
            </Stack>
          </Form>
        </Grid>
      </Grid>
    </Container>
  );
}