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

namespace BoundaryLab.Infrastructure;

public sealed class LegacyPricer { public int Compute(int quantity) => checked(quantity * 2); }
public sealed class LegacyCostAdapter(LegacyPricer legacy) : ICost
{
    public int Quote(int units) { if (!UnitRule.Valid(units)) throw new ArgumentOutOfRangeException(nameof(units)); return legacy.Compute(units); }
}
public sealed class CountingCost(ICost inner) : ICost
{
    public int Calls { get; private set; }
    public int Quote(int units) { int result = inner.Quote(units); Calls++; return result; }
}