using LehrerApp.Core.Models;
using LehrerApp.Core.Services;
using LehrerApp.Desktop.ViewModels.Groups;
using Xunit;

namespace LehrerApp.Desktop.Tests;

/// <summary>Tests für die direkte, einlagige Lerngruppen-Navigation.</summary>
public sealed class GroupListViewModelTests
{
    private static GroupListViewModel BuildVm(params LearningGroup[] groups) =>
        new(new FakeGroups([.. groups]), new FakeSubjects([]), new SchoolYearService());

    [Fact]
    public void Gruppenkarte_OeffnetDirektDieUebersicht()
    {
        var group = CurrentGroup("9c");
        var vm = BuildVm(group);
        Guid? openedId = null;
        int? openedTab = null;
        vm.OnNavigateToDetail = (id, tab) => { openedId = id; openedTab = tab; };

        Assert.Single(vm.Groups).OpenCommand.Execute(null);

        Assert.Equal(group.Id, openedId);
        Assert.Equal(0, openedTab);
    }

    [Fact]
    public async Task Verwaltungsmenue_BearbeitetDieGewaehlteKarteOhneZwischenauswahl()
    {
        var first = CurrentGroup("9a");
        var second = CurrentGroup("9b");
        var vm = BuildVm(first, second);
        Guid? editedId = null;
        vm.OnEditGroup = id => { editedId = id; return Task.CompletedTask; };
        var secondItem = vm.Groups.Single(x => x.Id == second.Id);

        await secondItem.EditCommand.ExecuteAsync(null);

        Assert.Equal(second.Id, editedId);
    }

    [Fact]
    public void Suche_FiltertWeiterhinNachGruppenname()
    {
        var vm = BuildVm(CurrentGroup("9 Chemie"), CurrentGroup("10 Mathematik"));

        vm.SearchText = "Chemie";

        Assert.Equal("9 Chemie", Assert.Single(vm.Groups).Name);
    }

    [Fact]
    public void Archivieren_WirktAufDieKarteUndEntferntSieAusDerAktivenListe()
    {
        var group = CurrentGroup("9c");
        var vm = BuildVm(group);
        var item = Assert.Single(vm.Groups);

        item.ToggleArchiveCommand.Execute(null);

        Assert.False(group.IsActive);
        Assert.Empty(vm.Groups);
    }

    private static LearningGroup CurrentGroup(string name) => new()
    {
        Name = name,
        SchoolYear = new SchoolYearService().CurrentSchoolYear(),
        IsActive = true,
    };
}