namespace LehrerApp.Core.Models;

public class Grade
{
    public Guid Id { get; set; } = Guid.NewGuid();
    public Guid StudentId { get; set; }
    public Guid GroupId { get; set; }
    public GradeCategory Category { get; set; }
    public string Value { get; set; } = "";
    public DateOnly Date { get; set; }
    public double Weight { get; set; } = 1.0;
    public string? Note { get; set; }
    public DateTime CreatedAt { get; set; } = DateTime.UtcNow;
}
public enum GradeCategory { Oral, Homework, Participation, Project, Other }

/// <summary>
/// Prozentuale Gewichtung von Klausuren/Mitarbeit/sonstigen Leistungen für die Zeugnisnote.
/// Entweder gruppenspezifisch (<see cref="GroupId"/> gesetzt) oder als Voreinstellung je
/// Gruppentyp (<see cref="GroupType"/> gesetzt, <see cref="GroupId"/> null).
/// </summary>
public class GradingScheme
{
    public Guid Id { get; set; } = Guid.NewGuid();
    public Guid? GroupId { get; set; }
    public GroupType? GroupType { get; set; }
    public double ExamsPercent { get; set; }
    public double ParticipationPercent { get; set; }
    public double OtherPercent { get; set; }
    public DateTime UpdatedAt { get; set; } = DateTime.UtcNow;
}

public class Unit
{
    public Guid Id { get; set; } = Guid.NewGuid();
    public Guid GroupId { get; set; }
    public string Title { get; set; } = "";
    public DateOnly? StartDate { get; set; }
    public DateOnly? EndDate { get; set; }
    public List<string> Competencies { get; set; } = [];
    public UnitStatus Status { get; set; } = UnitStatus.Planned;
    public string? Notes { get; set; }
    public DateTime CreatedAt { get; set; } = DateTime.UtcNow;
    public DateTime UpdatedAt { get; set; } = DateTime.UtcNow;
}
public class Lesson
{
    public Guid Id { get; set; } = Guid.NewGuid();
    public Guid UnitId { get; set; }
    public Guid GroupId { get; set; }
    public DateOnly Date { get; set; }
    public int? LessonNumber { get; set; }
    public string Topic { get; set; } = "";
    public string? Phase { get; set; }
    public List<string> Methods { get; set; } = [];
    public List<string> Materials { get; set; } = [];
    public string? Homework { get; set; }
    public string? Reflection { get; set; }
    public LessonStatus Status { get; set; } = LessonStatus.Planned;
    public DateTime UpdatedAt { get; set; } = DateTime.UtcNow;
}
public enum UnitStatus { Planned, Active, Completed }
public enum LessonStatus { Planned, Conducted }

/// <summary>
/// Zeugnisnote eines Schülers in einer Lerngruppe für einen Zeitraum (Halbjahr/Gesamtjahr).
/// <see cref="CalculatedValue"/> ist das zuletzt berechnete Ergebnis; <see cref="OverrideValue"/>
/// überschreibt es bei pädagogischem Ermessen (erfordert <see cref="OverrideReason"/>).
/// Nach dem Festschreiben (<see cref="IsLocked"/>) wird der Datensatz nicht mehr neu berechnet.
/// </summary>
public class ReportGrade
{
    public Guid Id { get; set; } = Guid.NewGuid();
    public Guid StudentId { get; set; }
    public Guid GroupId { get; set; }
    public string Period { get; set; } = "";
    public string CalculatedValue { get; set; } = "";
    public string? OverrideValue { get; set; }
    public string? OverrideReason { get; set; }
    public bool IsLocked { get; set; }
    public DateTime UpdatedAt { get; set; } = DateTime.UtcNow;
}