public List <EngineerSchedule> GetAllEngineerSchedules()
{
List <Engineer> engineers = _repository.GetAllEngineers().Where(e => e.IsAvailable == true).ToList();
List <Engineer> initialList = _repository.GetAllEngineers().ToList();
List <EngineerSchedule> previousweek = null;
if (engineers.Count < (shiftDays / 2))
{
throw new InvalidOperationException("There are no enough engineers to generate schedule,adhering the rules");
}
List <EngineerSchedule> engineerSchedules = new List <EngineerSchedule>();
DateTime currentDate = System.DateTime.Now;
//Schedule starts from next monday
int diffDays = ((int)DayOfWeek.Monday - (int)currentDate.DayOfWeek + 7) % 7;
DateTime scheduleStartdate = currentDate.AddDays(diffDays);
//Schedule spans for 2weeks 12 days(Monday to friday)
DateTime scheduleEnddate = scheduleStartdate.AddDays(12);
DateTime currentScheduleStart = scheduleStartdate;
for (int j = 0; j < scheduleSpan; j++)
{
if (j > 0)
{
//To ensure that we are not getting the same random numbers in each week
Thread.Sleep(100);
}
var rand = new Random();
var randomEngineers = engineers.OrderBy(item => rand.Next()).Where(e => e.IsAvailable == true).ToList();
if (randomEngineers.Count < shiftDays)
{
int noOfengShortage = shiftDays - randomEngineers.Count;
//To make sure randomEngineers picked for 2nd week hasnt completed 1 day of support already in previous week
if (j > 0 && previousweek.Count > 0)
{
List <Engineer> assignedEngineers = new List <Engineer>();
foreach (EngineerSchedule es in previousweek)
{
foreach (Engineer eng in es.engineer)
{
assignedEngineers.Add(eng);
}
}
//To avoid duplicates in 2nd week,and make sure engineers opt out in last week completes 1 whole day of support
foreach (Engineer e in engineers)
{
bool isShiftcompletedPrevweek = assignedEngineers.Any(emp => emp.ID == e.ID);
bool isRandom = randomEngineers.Any(emp => emp.ID == e.ID);
if (isShiftcompletedPrevweek == true && isRandom == true)
{
e.IsAvailable = false;
}
}
}
//Shuffle the available Engineers list again,so that we get enough engineers to work for the existing week
var randomEngineers1 = engineers.OrderBy(item => rand.Next()).Where(e => e.IsAvailable == true).ToList().Take(noOfengShortage).ToList();
//Add it to the original randomEngineers list
foreach (Engineer e in randomEngineers1)
{
bool isOvertime = false;
if (isOvertime == false)
{
randomEngineers.Add(e);
}
}
if (j == 0)
{
//Set IsAvailable=false for engineers picked in 2nd shuffle,if they have completed 1 day of support
engineers = UpdateAvailableEngineersPool(randomEngineers, initialList);
}
}
if (j > 0 && engineerSchedules.Count > 0)
{
currentScheduleStart = Convert.ToDateTime(engineerSchedules[engineerSchedules.Count - 1].ScheduleDate);
if (currentScheduleStart.DayOfWeek == DayOfWeek.Friday)
{
int diffDay = ((int)DayOfWeek.Monday - (int)currentScheduleStart.DayOfWeek + 7) % 7;
currentScheduleStart = currentScheduleStart.AddDays(diffDay);
}
}
engineerSchedules = GenerateSschedulePerWeek(currentScheduleStart, scheduleStartdate, scheduleEnddate, randomEngineers, engineerSchedules, previousweek);
previousweek = engineerSchedules;
}
return(engineerSchedules);
}
