export interface PerformanceBudgets {
  routeJsBytes?: number;
  routeCssBytes?: number;
  htmlBytes?: number;
  imageBytes?: number;
  hydrationMs?: number;
  serverRenderMs?: number;
}

export interface PerformanceMeasurement {
  routeJsBytes?: number;
  routeCssBytes?: number;
  htmlBytes?: number;
  imageBytes?: number;
  hydrationMs?: number;
  serverRenderMs?: number;
}

export interface BudgetViolation {
  metric: keyof PerformanceBudgets;
  budget: number;
  actual: number;
  overBy: number;
}

export function checkPerformanceBudgets(
  budgets: PerformanceBudgets,
  measurement: PerformanceMeasurement,
): BudgetViolation[] {
  const violations: BudgetViolation[] = [];
  for (const metric of Object.keys(budgets) as Array<keyof PerformanceBudgets>) {
    const budget = budgets[metric];
    const actual = measurement[metric];
    if (budget === undefined || actual === undefined || actual <= budget) continue;
    violations.push({ metric, budget, actual, overBy: actual - budget });
  }
  return violations;
}