private (int order, decimal?cost) CalculateFlat(FlatRate flatRate, PriceRequest request)
{
if (request.Enter.TimeOfDay >= flatRate.Enter.from && request.Enter.TimeOfDay <= flatRate.Enter.to &&
request.Exit.TimeOfDay >= flatRate.Leave.from && request.Exit.TimeOfDay <= flatRate.Leave.to &&
(!flatRate.Days.Any() || (flatRate.Days.Contains(request.Enter.DayOfWeek) && flatRate.Days.Contains(request.Exit.DayOfWeek))))
{
return(flatRate.Order, flatRate.Price);
}
return(0, null);
}
public decimal Evaluate(PriceRequest request)
{
var flatRate = Rates
.OfType <FlatRate>()
.Select(r => CalculateFlat(r, request))
.Where(r => r.cost.HasValue)
.OrderBy(c => c.order)
.ToList();
if (flatRate.Any())
{
return(flatRate.First().cost.Value);
}
var totalHours = Math.Round((request.Exit - request.Enter).TotalMinutes / 60, 2);
return(Rates
.OfType <HourlyRate>()
.Where(r => r.MinHours < totalHours && r.MaxHours >= totalHours)
.Select(r => CalculateHourly((decimal)totalHours, request, r))
.DefaultIfEmpty()
.Min());
}
private decimal CalculateHourly(decimal totalHours, PriceRequest request, HourlyRate rate)
{
return(rate.RechargePeriodHours.HasValue
? rate.Price * Math.Ceiling(totalHours / rate.RechargePeriodHours.Value)
: rate.Price);
}
