namespace LehrerApp.Core.Models;

public class Student
{
    public Guid Id { get; set; } = Guid.NewGuid();
    public string FirstName { get; set; } = "";
    public string LastName { get; set; } = "";
    public string FullName => $"{LastName}, {FirstName}";
    public DateOnly? DateOfBirth { get; set; }
    public Gender? Gender { get; set; }
    public List<Contact> Contacts { get; set; } = [];
    public string? Notes { get; set; }
    public bool IsActive { get; set; } = true;
    public DateTime CreatedAt { get; set; } = DateTime.UtcNow;
    public DateTime UpdatedAt { get; set; } = DateTime.UtcNow;
}
public class Contact
{
    public Guid Id { get; set; } = Guid.NewGuid();
    public string Name { get; set; } = "";
    public string Relation { get; set; } = "";
    /// <summary>Vollständige Anrede für Briefe, z.B. „Sehr geehrte Frau Mustermann,“.</summary>
    public string? LetterSalutation { get; set; }
    public string? Phone { get; set; }
    public string? Email { get; set; }
    public string? Street { get; set; }
    public string? PostalCode { get; set; }
    public string? City { get; set; }
    public DateOnly? InvalidSince { get; set; }
    public ContactInvalidReason? InvalidReason { get; set; }
    public string? InvalidReasonDetails { get; set; }
}

public enum ContactInvalidReason
{
    Moved,
    NewPhoneNumber,
    LostCustody,
    NewEmailAddress,
    NoLongerResponsible,
    Other,
}

public enum Gender { M, W, D }

public sealed record StudentReferenceSummary(
    int Memberships,
    int ExamResults,
    int Grades,
    int ReportGrades,
    int ParticipationEntries,
    int DocumentationEntries)
{
    public int Total => Memberships + ExamResults + Grades + ReportGrades
                        + ParticipationEntries + DocumentationEntries;
    public bool HasReferences => Total > 0;
}