import type { MonitoringCache } from './types.js';

export interface TargetVehicleMileageSnapshot {
  dailyKm: number;
  totalKm: number | null;
  isOnline: boolean;
}

export function targetVehicleMileageFromMonitoringCache(
  cache: MonitoringCache | null,
  requestedDate: string,
  today: string,
  plates: string[],
): Map<string, TargetVehicleMileageSnapshot> | null {
  if (!cache || !requestedDate || requestedDate !== today) return null;

  const selected = new Set(plates);
  return new Map(
    cache.vehicles
      .filter(vehicle => selected.has(vehicle.plate))
      .map(vehicle => [vehicle.plate, {
        dailyKm: Math.max(0, Number(vehicle.dailyKm) || 0),
        totalKm: vehicle.totalKm == null ? null : Math.max(0, Number(vehicle.totalKm) || 0),
        isOnline: vehicle.isOnline,
      }]),
  );
}