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

namespace LehrerApp.Desktop.Tests;

public class StudentListViewModelTests
{
    private readonly Student _anna = new() { FirstName = "Anna", LastName = "Beispiel", Gender = Gender.W };
    private readonly Student _ben = new() { FirstName = "Ben", LastName = "Muster", Gender = Gender.M };
    private readonly LearningGroup _group = new() { Name = "Mathematik 7a" };

    [Fact]
    public void SucheFindetSchuelerWeiterhinUeberNamen()
    {
        var vm = BuildViewModel();

        vm.SearchText = "Anna";

        Assert.Single(vm.Students);
        Assert.Equal(_anna.Id, vm.Students[0].Id);
    }

    [Fact]
    public void SucheFindetSchuelerUeberLerngruppe()
    {
        var vm = BuildViewModel();

        vm.SearchText = "7a";

        Assert.Single(vm.Students);
        Assert.Equal(_ben.Id, vm.Students[0].Id);
    }

    [Fact]
    public void LeereSucheZeigtAlleSchueler()
    {
        var vm = BuildViewModel();

        vm.SearchText = "   ";

        Assert.Equal(2, vm.Students.Count);
    }

    [Fact]
    public void ListeneintraegeZeigenAvatarAusGespeichertemGeschlecht()
    {
        var vm = BuildViewModel();

        Assert.Equal("W", vm.Students.Single(s => s.Id == _anna.Id).AvatarLabel);
        Assert.Equal("M", vm.Students.Single(s => s.Id == _ben.Id).AvatarLabel);
    }

    [Fact]
    public void SucheOhneTreffer_LiefertHilfreichenLeerzustand()
    {
        var vm = BuildViewModel();

        vm.SearchText = "nicht vorhanden";

        Assert.True(vm.HasNoStudents);
        Assert.False(vm.HasStudents);
        Assert.Contains("Suche", vm.EmptyListMessage);
    }

    private StudentListViewModel BuildViewModel() => new(
        new FakeStudents([_anna, _ben]),
        new FakeGroups([_group]),
        new FakeMemberships([
            new GroupMembership { StudentId = _ben.Id, GroupId = _group.Id },
        ]));
}