сданный вариант

SquirrelContract/SquirrelBusinessLogic/Implementations/SalaryBusinessLogicContract.cs

@@ -73,40 +73,43 @@ public class SalaryBusinessLogicContract(ISalaryStorageContract salaryStorageCon
 
     private double CalculateSalaryForBartender(List<SaleDataModel> sales, DateTime startDate, DateTime finishDate, BartenderPostConfiguration config)
     {
-        var tasks = new List<Task>();
         var calcPercent = 0.0;
-        for (var date = startDate; date < finishDate; date = date.AddDays(1))
+        var days = (finishDate - startDate).Days;
+        var dates = Enumerable.Range(0, days)
+                             .Select(offset => startDate.AddDays(offset))
+                             .ToList();
+
+        var parallelOptions = new ParallelOptions
         {
-            tasks.Add(Task.Factory.StartNew((object? obj) =>
+            MaxDegreeOfParallelism = _salaryConfiguration.MaxConcurrentThreads
+        };
+
+        Parallel.ForEach(dates, parallelOptions, date =>
+        {
+            var salesInDay = sales.Where(x => x.SaleDate.Date == date.Date).ToArray();
+            if (salesInDay.Length == 0) return;
+
+            double dailySum = salesInDay.Sum(x => x.Sum);
+            double averageSale = dailySum / salesInDay.Length;
+
+            lock (_lockObject)
             {
-                var dateInTask = (DateTime)obj!;
-                var salesInDay = sales.Where(x => x.SaleDate >= dateInTask && x.SaleDate <= dateInTask.AddDays(1)).ToArray();
-                if (salesInDay.Length > 0)
-                {
-                    lock (_lockObject)
-                    {
-                        calcPercent += (salesInDay.Sum(x => x.Sum) / salesInDay.Length) * config.SalePercent;
-                    }
-                }
-            }, date));
-        }
-        var calcBonusTask = Task.Run(() =>
-        {
-            return sales.Where(x => x.Sum > _salaryConfiguration.ExtraSaleSum).Sum(x => x.Sum) * config.BonusForExtraSales;
+                calcPercent += averageSale * config.SalePercent;
+            }
         });
+        
+        double bonus = 0;
         try
         {
-            Task.WaitAll([Task.WhenAll(tasks), calcBonusTask]);
+            bonus = sales.Where(x => x.Sum > _salaryConfiguration.ExtraSaleSum)
+                         .Sum(x => x.Sum) * config.BonusForExtraSales;
         }
-        catch (AggregateException agEx)
+        catch (Exception ex)
         {
-            foreach (var ex in agEx.InnerExceptions)
-            {
-                _logger.LogError(ex, "Error in the cashier payroll process");
-            }
-            return 0;
+            _logger.LogError(ex, "Error in bonus calculation");
         }
-        return config.Rate + calcPercent + calcBonusTask.Result;
+
+        return config.Rate + calcPercent + bonus;
     }
     private double CalculateSalaryForManager(DateTime startDate, DateTime finishDate, ManagerPostConfiguration config)
     {