// Copyright 2022 The Parca Authors
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

import {useMemo} from 'react';

export interface LabelNameMapping {
  displayName: string;
  fullName: string;
}

export const transformLabelName = (labelName: string): string => {
  return labelName.replace(/^(attributes\.|attributes_resource\.)/, '');
};

export const useLabelNameMappings = (labelNames: string[]): LabelNameMapping[] => {
  return useMemo(() => {
    return labelNames.map(name => ({
      displayName: transformLabelName(name),
      fullName: name,
    }));
  }, [labelNames]);
};

export const useExtractedLabelNames = (
  response: {labelNames?: string[]} | undefined,
  error: Error | undefined | null
): string[] => {
  return useMemo(() => {
    return (error === undefined || error == null) && response !== undefined && response != null
      ? response.labelNames?.filter(e => e !== '__name__') ?? []
      : [];
  }, [response, error]);
};