import { useMemo } from 'react';
import { computeDepthBandsFromDlobL2, type ComputedDlobDepthBandRow } from './dlobDerivedMetrics';
import { useDlobL2 } from './useDlobL2';

const COMPUTED_DLOB_LEVELS = 512;

export type DlobDepthBandRow = ComputedDlobDepthBandRow;

export function useDlobDepthBands(
  marketName: string
): { rows: DlobDepthBandRow[]; connected: boolean; error: string | null } {
  const { l2, connected, error } = useDlobL2(marketName, {
    levels: COMPUTED_DLOB_LEVELS,
    grouping: 'raw',
  });

  const rows = useMemo(() => computeDepthBandsFromDlobL2(l2), [l2]);
  return { rows, connected, error };
}