namespace LehrerApp.Core.Models;

public class Exam
{
    public Guid Id { get; set; } = Guid.NewGuid();
    public Guid GroupId { get; set; }
    public string Title { get; set; } = "";             // "Arbeit Nr. 2 – Redox"
    public DateOnly Date { get; set; }
    public string Subject { get; set; } = "";
    public int? ExamNumber { get; set; }
    public List<ExamTask> Tasks { get; set; } = [];     // nested – kein JOIN
    public List<GradingKeyEntry> GradingKey { get; set; } = [];
    public ExamStatus Status { get; set; } = ExamStatus.Planned;
    public string? Notes { 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 class GradingKeyEntry
{
    public string Grade { get; set; } = "";             // "1","2"... oder "15","14"...
    public double MinPercent { get; set; }
}

// Ergebnisse separat – für Notenspiegel ohne Aufgabentext laden
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; } = [];      // Index = Aufgabe Nr - 1
    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 }