export interface UsageTotals {
  input: number;
  output: number;
  cacheRead: number;
  cacheWrite: number;
  cost: number;
}

export function createUsageTotals(): UsageTotals {
  return { input: 0, output: 0, cacheRead: 0, cacheWrite: 0, cost: 0 };
}

export function addUsageToTotals(
  totals: UsageTotals,
  usage: { input: number; output: number; cacheRead: number; cacheWrite: number; cost: { total: number } },
): void {
  totals.input += usage.input;
  totals.output += usage.output;
  totals.cacheRead += usage.cacheRead;
  totals.cacheWrite += usage.cacheWrite;
  totals.cost += usage.cost.total;
}