namespace LehrerApp.Core.Models;

public class Exam
{
    public Guid Id { get; set; } = Guid.NewGuid();
    public Guid GroupId { get; set; }
    public string Title { get; set; } = "";
    public DateOnly Date { get; set; }
    public int? ExamNumber { get; set; }
    public List<ExamTask> Tasks { get; set; } = [];
    public List<GradingKeyEntry> GradingKey { get; set; } = [];
    public ExamStatus Status { get; set; } = ExamStatus.Planned;
    public DateOnly? ReturnedAt { get; set; }
    public Niveau? Niveau { get; set; }
    public string? Notes { get; set; }
    public DateOnly? ApprovalGrantedAt { get; set; }
    public DateOnly? AnnouncedAt { get; set; }
    /// Verknüpft Parallelklausuren (gleiche Arbeit, mehrere Kurse) für den Kurs-Umschalter
    /// auf der Klausuren-Hauptseite — Id der "Ursprungs"-Klausur, gesetzt beim Duplizieren
    /// (siehe ExamDialogViewModel.Save).
    public Guid? SharedExamGroupId { get; set; }
    public DateTime CreatedAt { get; set; } = DateTime.UtcNow;
    public DateTime UpdatedAt { get; set; } = DateTime.UtcNow;
}
public class ExamTask
{
    public int Nr { get; set; }
    public string? Title { get; set; }
    public double MaxPoints { get; set; }
    public double Weight { get; set; } = 1.0;
    public List<string> CompetencyCodes { get; set; } = [];
}
public class GradingKeyEntry
{
    public string Grade { get; set; } = "";
    public double MinPercent { get; set; }
}
public class GradingKeyTemplate
{
    public Guid Id { get; set; } = Guid.NewGuid();
    public string Name { get; set; } = "";
    public GradingSystem GradingSystem { get; set; }
    public List<GradingKeyEntry> Entries { get; set; } = [];
    public DateTime UpdatedAt { get; set; } = DateTime.UtcNow;
}
public class ExamResult
{
    public Guid Id { get; set; } = Guid.NewGuid();
    public Guid ExamId { get; set; }
    public Guid StudentId { get; set; }
    public List<double> Points { get; set; } = [];
    public double TotalPoints { get; set; }
    public string? Grade { get; set; }
    public bool Absent { get; set; }
    public string? Comment { get; set; }
    public DateTime UpdatedAt { get; set; } = DateTime.UtcNow;
}
public enum ExamStatus { Planned, Conducted, Graded, Returned }