public (FlightModel Flight, TimeSpan FlightTime) FindBestFlight(DepartureDays dayOfDeparture, TimeSpan timeOfDeparture)
{
var minTime = TimeSpan.MaxValue;
var flightWithMinTime = new FlightModel();
foreach (var flight in Flights)
{
var timeUntilEndOfFlight = TimeUntilEndOfFlight(flight, dayOfDeparture, timeOfDeparture);
if (timeUntilEndOfFlight < minTime)
{
minTime = timeUntilEndOfFlight;
flightWithMinTime = flight;
}
}
return(flightWithMinTime, minTime);
}
private TimeSpan TimeUntilEndOfFlight(FlightModel flight, DepartureDays dayOfDeparture, TimeSpan timeOfDeparture)
{
int daysUntilFlight = default;
DepartureDays nearestFlightDay = dayOfDeparture;
if (timeOfDeparture >= flight.DepartureTime)
{
GoToNextDay(ref nearestFlightDay, ref daysUntilFlight);
}
while (!flight.DeparturesDays.Contains(nearestFlightDay))
{
GoToNextDay(ref nearestFlightDay, ref daysUntilFlight);
}
return(new TimeSpan(daysUntilFlight, 0, 0, 0) + (flight.DepartureTime - timeOfDeparture) + flight.TakeTimeInAir());
}