export type LabelOperator = '=' | '!=' | '=~' | '!~';

export type Label = {
  name: string;
  value: string;
  op: LabelOperator;
};

export interface Metric {
  name: string;
  help: string;
  type: string;
}

export interface PromMetricsMetadataItem {
  type: string;
  help: string;
  unit?: string;
}

export interface PromMetricsMetadata {
  [metric: string]: PromMetricsMetadataItem;
}

type FetchFn = (input: RequestInfo, init?: RequestInit) => Promise<Response>;

export interface DataProviderParams {
  url?: string;
  lookbackInterval?: number;
  variablesNames?: string[];
  durationVariablesCompletion?: boolean;
  request: FetchFn;
  httpMethod?: 'POST' | 'GET';
  apiPrefix?: string;
  httpErrorHandler?: (error: any) => void;
  // When false, DataProvider will not send any network requests.
  enableRequests?: boolean;
}