export const NANOVDB_PROGRESSIVE_REDRAW_MAX_FRAMES = 32;
export const NANOVDB_PROGRESSIVE_REDRAW_LIMIT_CODE = "NANOVDB_PROGRESSIVE_REDRAW_LIMIT" as const;

export interface NanoVDBProgressiveRedrawBudgetResult {
  allowed: boolean;
  redrawCount: number;
  capped: boolean;
  errorCode: typeof NANOVDB_PROGRESSIVE_REDRAW_LIMIT_CODE | null;
}

export function validateNanoVDBProgressiveRedrawLimit(value: number): number {
  if (!Number.isSafeInteger(value) || value < 1 || value > 1024) {
    throw new Error("NANOVDB_INVALID_ARGUMENT: progressive redraw limit must be an integer from 1 to 1024");
  }
  return value;
}

export function consumeNanoVDBProgressiveRedrawBudget(
  redrawCount: number,
  maxRedraws: number,
): NanoVDBProgressiveRedrawBudgetResult {
  if (!Number.isSafeInteger(redrawCount) || redrawCount < 0) {
    throw new Error("NANOVDB_INVALID_ARGUMENT: progressive redraw count must be a non-negative integer");
  }
  const limit = validateNanoVDBProgressiveRedrawLimit(maxRedraws);
  if (redrawCount >= limit) {
    return { allowed: false, redrawCount, capped: true, errorCode: NANOVDB_PROGRESSIVE_REDRAW_LIMIT_CODE };
  }
  const nextCount = redrawCount + 1;
  const capped = nextCount >= limit;
  return {
    allowed: true,
    redrawCount: nextCount,
    capped,
    errorCode: capped ? NANOVDB_PROGRESSIVE_REDRAW_LIMIT_CODE : null,
  };
}