import {
  isHistogramFrameBucketMinFieldName,
  isHistogramFrameBucketMaxFieldName,
  DataFrame,
  FieldType,
} from '@grafana/data';

export function originalDataHasHistogram(frames?: DataFrame[]): boolean {
  if (frames?.length !== 1) {
    return false;
  }
  const frame = frames[0];
  if (frame.fields.length < 3) {
    return false;
  }

  if (
    !isHistogramFrameBucketMinFieldName(frame.fields[0].name) ||
    !isHistogramFrameBucketMaxFieldName(frame.fields[1].name)
  ) {
    return false;
  }
  for (const field of frame.fields) {
    if (field.type !== FieldType.number) {
      return false;
    }
  }

  return true;
}