export type HomeStreamingRenderProbeSnapshot = Readonly<{
  settledListRenders: number;
  settledRowRenders: number;
  streamingRowRenders: number;
  unsplitListRenders: number;
  latestEntryMounts: number;
}>;

const emptySnapshot = (): HomeStreamingRenderProbeSnapshot => ({
  settledListRenders: 0,
  settledRowRenders: 0,
  streamingRowRenders: 0,
  unsplitListRenders: 0,
  latestEntryMounts: 0,
});

let enabled = false;
let snapshot = emptySnapshot();

export function enableHomeStreamingRenderProbe() {
  enabled = true;
  snapshot = emptySnapshot();
}

export function disableHomeStreamingRenderProbe() {
  enabled = false;
  snapshot = emptySnapshot();
}

export function resetHomeStreamingRenderProbe() {
  snapshot = emptySnapshot();
}

export function homeStreamingRenderProbeSnapshot(): HomeStreamingRenderProbeSnapshot {
  return snapshot;
}

export function noteSettledListRender() {
  if (enabled) snapshot = { ...snapshot, settledListRenders: snapshot.settledListRenders + 1 };
}

export function noteSettledRowRender() {
  if (enabled) snapshot = { ...snapshot, settledRowRenders: snapshot.settledRowRenders + 1 };
}

export function noteStreamingRowRender() {
  if (enabled) snapshot = { ...snapshot, streamingRowRenders: snapshot.streamingRowRenders + 1 };
}

export function noteUnsplitListRender() {
  if (enabled) snapshot = { ...snapshot, unsplitListRenders: snapshot.unsplitListRenders + 1 };
}

export function noteLatestEntryMount() {
  if (enabled) snapshot = { ...snapshot, latestEntryMounts: snapshot.latestEntryMounts + 1 };
}