export type QuotaBucket = 100 | 80 | 60 | 40 | 20 | 0;

export interface QuotaUsageInput {
  used: number;
  limit: number;
}

export function getApproximateQuotaBucket(input: QuotaUsageInput): QuotaBucket {
  const { used, limit } = input;

  if (limit <= 0) {
    return 0;
  }

  const safeUsed = clamp(used, 0, limit);
  const remainingRatio = ((limit - safeUsed) / limit) * 100;

  if (remainingRatio >= 81) {
    return 100;
  }

  if (remainingRatio >= 61) {
    return 80;
  }

  if (remainingRatio >= 41) {
    return 60;
  }

  if (remainingRatio >= 21) {
    return 40;
  }

  if (remainingRatio > 0) {
    return 20;
  }

  return 0;
}

function clamp(value: number, min: number, max: number): number {
  return Math.min(max, Math.max(min, value));
}