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

namespace LehrerApp.Desktop.Tests;

public class WithdrawStudentDialogViewModelTests
{
    [Fact]
    public void InitialisiertMitHeutigemDatumUndSpeichertAustritt()
    {
        var membership = new GroupMembership { JoinedAt = new DateOnly(2025, 9, 1) };
        var memberships = new FakeMemberships([membership]);
        var vm = new WithdrawStudentDialogViewModel(
            memberships, membership, "Anna Beispiel", "7a", new DateOnly(2025, 10, 5));

        Assert.Equal(new DateOnly(2025, 10, 5), DateOnly.FromDateTime(vm.SelectedDate!.Value.LocalDateTime));

        vm.SaveCommand.Execute(null);

        Assert.True(vm.WasSaved);
        Assert.Equal(new DateOnly(2025, 10, 5), membership.LeftAt);
    }

    [Fact]
    public void VerhindertAustrittVorEintritt()
    {
        var membership = new GroupMembership { JoinedAt = new DateOnly(2025, 9, 1) };
        var vm = new WithdrawStudentDialogViewModel(
            new FakeMemberships([membership]), membership, "Anna Beispiel", "7a");
        vm.SelectedDate = new DateTimeOffset(2025, 8, 31, 0, 0, 0, TimeSpan.Zero);

        vm.SaveCommand.Execute(null);

        Assert.False(vm.WasSaved);
        Assert.Null(membership.LeftAt);
        Assert.NotEmpty(vm.DateError);
    }
}