private static Statistics GetStatistics(CarWasher carWasher)
{
try
{
var visitors = carWasher.GetAllVisitors();
var processedVisitors = visitors.Where(v => v.ProcessedOn.HasValue && v.Status == Enums.Enum.VisitorStatus.Processed);
TimeSpan averageProcessingTime, averageTotalTime, averageWaitingTime;
if (processedVisitors.Any())
{
averageTotalTime = TimeSpan.FromMilliseconds(processedVisitors.Average(v => (v.ProcessedOn.Value - v.GeneratedOn).TotalMilliseconds));
averageWaitingTime = TimeSpan.FromMilliseconds(processedVisitors.Average(v => ((v.ProcessedOn.Value - v.GeneratedOn) - v.ProcessingDuration).TotalMilliseconds));
averageProcessingTime = averageTotalTime - averageWaitingTime;
}
var statistics = new Statistics
{
GeneratedVisitors = visitors.Count(),
ProcessedVisitors = processedVisitors.Count(),
RejectedVisitors = visitors.Count(v => v.Status == Enums.Enum.VisitorStatus.Rejected),
AverageProcessingTime = averageProcessingTime,
AverageTotalTime = averageTotalTime,
AverageWaitingTime = averageWaitingTime
};
return(statistics);
}
catch (Exception ex)
{
Console.WriteLine($"Error getting statistics. Exception: {ex.Message}");
return(null);
}
}
