namespace LehrerApp.Core.Models;

public class LearningGroup
{
    public Guid Id { get; set; } = Guid.NewGuid();
    public string Name { get; set; } = "";
    public GroupType Type { get; set; }
    public Guid? SubjectId { get; set; }
    public string SchoolYear { get; set; } = "";
    public int GradeLevel { get; set; }
    public GradingSystem GradingSystem { get; set; }
    public int? HoursPerWeek { get; set; }
    public bool IsActive { get; set; } = true;
    public bool IsOwnClass { get; set; }
    public bool IsDifferentiated { get; set; }
    public DateTime CreatedAt { get; set; } = DateTime.UtcNow;
    public DateTime UpdatedAt { get; set; } = DateTime.UtcNow;
}
/// <summary>
/// Mitgliedschaft eines Schülers in einer Lerngruppe. Das Schuljahr gehört zur
/// Lerngruppe und wird deshalb hier nicht ein zweites Mal gespeichert.
/// </summary>
public class GroupMembership
{
    public Guid Id { get; set; } = Guid.NewGuid();
    public Guid StudentId { get; set; }
    public Guid GroupId { get; set; }
    /// <summary>Tag, an dem die Zuordnung in der App angelegt wurde.</summary>
    public DateOnly AddedOn { get; set; } = DateOnly.FromDateTime(DateTime.Today);
    public MembershipPeriod Period { get; set; } = MembershipPeriod.FullYear;
    public DateOnly? JoinedAt { get; set; }
    public DateOnly? LeftAt   { get; set; }
    public Niveau? Niveau { get; set; }
}
public enum MembershipPeriod { FullYear, H1Only, H2Only, Custom }
public enum GroupType { Class, Course }
public enum GradingSystem { Grades1To6, Points0To15 }
public enum Niveau { E, G, Foerder }