using CursorLang.Models;
using CursorLang.ViewModels;

namespace CursorLang.Tests.ViewModels;

public sealed class LayoutPopupViewModelTests
{
    // Before the first layout change there is nothing to show, yet the window
    // is already being built
    [Fact]
    public void Before_the_first_layout_a_dash_is_shown()
    {
        Assert.Equal("—", new LayoutPopupViewModel(new AppSettings()).ShortName);
    }

    [Fact]
    public void The_look_comes_straight_from_the_settings()
    {
        var settings = new AppSettings();

        Assert.Same(settings, new LayoutPopupViewModel(settings).Settings);
    }

    [Fact]
    public void A_changed_layout_name_is_announced_to_subscribers()
    {
        var viewModel = new LayoutPopupViewModel(new AppSettings());
        List<string?> changed = [];
        viewModel.PropertyChanged += (_, e) => changed.Add(e.PropertyName);

        viewModel.ShortName = "RU";

        Assert.Equal("RU", viewModel.ShortName);
        Assert.Equal([nameof(LayoutPopupViewModel.ShortName)], changed);
    }

    [Fact]
    public void The_same_layout_name_is_not_announced_again()
    {
        var viewModel = new LayoutPopupViewModel(new AppSettings()) { ShortName = "RU" };
        List<string?> changed = [];
        viewModel.PropertyChanged += (_, e) => changed.Add(e.PropertyName);

        viewModel.ShortName = "RU";

        Assert.Empty(changed);
    }
}