using System;
using System.Collections.Generic;
using System.Linq;
using BoundaryLab.Domain;

namespace BoundaryLab.Application;

public interface IReserve { bool Reserve(int units); }
public interface ICapacity { int Free { get; } void Commit(int units); }
public sealed class ReserveService(ICapacity capacity) : IReserve
{
    public bool Reserve(int units)
    {
        if (!CapacityRule.CanTake(units, capacity.Free)) return false;
        capacity.Commit(units); return true;
    }
}