using System.ComponentModel;
using LehrerApp.Core.Interfaces;

namespace LehrerApp.Desktop.Services.Mcp.Tools;

/// <summary>MCP-Read-Tool "get_exams" (Phase 1, siehe Planungsdokument).</summary>
public class ExamTools(IExamRepository exams, IExamResultRepository examResults)
{
    [Description("Listet Klausuren, optional gefiltert nach Lerngruppe.")]
    public List<ExamDto> GetExams(
        [Description("Optionale Lerngruppen-ID zum Filtern.")] Guid? groupId = null,
        [Description("Ergebnisse je Schüler mitliefern (Standard: nein, hält die Antwort klein).")] bool includeResults = false)
    {
        var list = groupId is { } id ? exams.GetByGroup(id) : exams.GetAll();
        return list.Select(e => new ExamDto(
            e.Id, e.GroupId, e.Title, e.Date, e.Status, e.Niveau,
            includeResults
                ? examResults.GetByExam(e.Id)
                    .Select(r => new ExamResultDto(r.StudentId, r.TotalPoints, r.Grade, r.Absent))
                    .ToList()
                : null)).ToList();
    }
}