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

namespace LehrerApp.Desktop.Tests;

public sealed class GlobalSearchViewModelTests
{
    [Fact]
    public void LeereSuche_ZeigtSchnellaktionen()
    {
        var vm = BuildVm();

        Assert.Collection(vm.Results,
            item => Assert.Equal(GlobalSearchAction.NewTask, item.Action),
            item => Assert.Equal(GlobalSearchAction.NewReminder, item.Action),
            item => Assert.Equal(GlobalSearchAction.NewStudent, item.Action));
        Assert.Same(vm.Results[0], vm.SelectedResult);
    }

    [Fact]
    public void Suche_FindetSchuelerGruppeKlausurUndAufgabe()
    {
        var group = new LearningGroup { Name = "9 Chemie", SchoolYear = "2026/27", GradeLevel = 9 };
        var student = new Student { FirstName = "Mia", LastName = "Chemie" };
        var exam = new Exam { GroupId = group.Id, Title = "Chemie-Test", Date = new DateOnly(2026, 9, 1) };
        var tasks = new FakeWorkTasks();
        tasks.Add(new WorkTask { GroupId = group.Id, Title = "Chemie-Klausur korrigieren" });
        var vm = BuildVm([student], [group], [exam], tasks);

        vm.Query = "Chemie";

        Assert.Contains(vm.Results, x => x.Kind == GlobalSearchResultKind.Student && x.EntityId == student.Id);
        Assert.Contains(vm.Results, x => x.Kind == GlobalSearchResultKind.Group && x.EntityId == group.Id);
        Assert.Contains(vm.Results, x => x.Kind == GlobalSearchResultKind.Exam && x.EntityId == exam.Id);
        Assert.Contains(vm.Results, x => x.Kind == GlobalSearchResultKind.Task && x.Title.Contains("korrigieren"));
    }

    [Fact]
    public async Task TrefferAusfuehren_NavigiertUndSchliesstPalette()
    {
        var student = new Student { FirstName = "Mia", LastName = "Muster" };
        var vm = BuildVm([student]);
        vm.Query = "Muster";
        var result = Assert.Single(vm.Results, x => x.Kind == GlobalSearchResultKind.Student);
        GlobalSearchResult? navigated = null;
        var closed = false;
        vm.OnNavigate = x => navigated = x;
        vm.OnClose = () => closed = true;

        await vm.ExecuteCommand.ExecuteAsync(result);

        Assert.Same(result, navigated);
        Assert.True(closed);
    }

    [Fact]
    public async Task ErinnerungSchnellErfassen_StartetDialogAlsErinnerung()
    {
        var vm = BuildVm();
        bool? reminder = null;
        vm.OnQuickAddTask = value => { reminder = value; return Task.CompletedTask; };
        var action = vm.Results.Single(x => x.Action == GlobalSearchAction.NewReminder);

        await vm.ExecuteCommand.ExecuteAsync(action);

        Assert.True(reminder);
    }

    private static GlobalSearchViewModel BuildVm(List<Student>? students = null,
        List<LearningGroup>? groups = null, List<Exam>? exams = null, FakeWorkTasks? tasks = null) =>
        new(new FakeStudents(students ?? []), new FakeGroups(groups ?? []),
            new FakeExams(exams ?? []), tasks ?? new FakeWorkTasks());
}