using Core.Entities;

namespace Core.Calculation;

public class TeamSchedulerSolution(
    Team[][] timeSlots,
    string status)
{
    public Team[][] TimeSlots { get; set; } = timeSlots;
    public string Status { get; set; } = status;


    public static int GetStudentTeamOverlapCount(Team[][] timeSlots)
    {
        return timeSlots.Sum(GetStudentTeamOverlapCount);
    }

    private static int GetStudentTeamOverlapCount(Team[] timeSlot)
    {
        return GetStudentTeamOverlaps(timeSlot).Count();
    }

    public static IEnumerable<Tuple<Student, IEnumerable<Team>>> GetStudentTeamOverlaps(Team[] timeSlot)
    {
        return
            from s in timeSlot.SelectMany(ts => ts.Students).Distinct()
            group s by timeSlot.Where(t => t.Students.Contains(s))
            into gs
            where gs.Key.Count() > 1
            select Tuple.Create(gs.First(), gs.Key);
    }


    public static Student[] GetStudentsNotInTimSlot(Team[] timeSlot, Student[] students)
    {
        var studentsInTimeSlot = timeSlot.SelectMany(ts => ts.Students).Distinct();
        return
            (from allStudent in students
                where studentsInTimeSlot.FirstOrDefault(e => e.Equals(allStudent)) == null
                select allStudent
            ).ToArray();

    }
}