using MeterVault.App;
using MeterVault.App.Theme;

namespace MeterVault.Integration.Tests.Analysis;

/// <summary>
/// The cookie forms of the shell's preferences (D-48, D-49): the expanded navigation groups, the group holding a route,
/// and the theme. Pure; no database.
/// </summary>
public sealed class ShellPreferenceTests
{
    [Fact]
    public void Navigation_groups_round_trip_through_their_cookie()
    {
        Assert.Null(NavGroups.Parse(null));
        Assert.Null(NavGroups.Parse("  "));
        Assert.Null(NavGroups.Parse("nonsense.more"));

        Assert.Equal(["config", "types"], NavGroups.Parse("types.config")!.Order());
        Assert.Equal(["views"], NavGroups.Parse("VIEWS.unknown")!);
        Assert.Empty(NavGroups.Parse("none")!);

        Assert.Equal("types.config", NavGroups.Format(["config", "types"]));
        Assert.Equal("none", NavGroups.Format([]));
        Assert.Equal("types.views", NavGroups.Format(NavGroups.DefaultExpanded));
    }

    [Theory]
    [InlineData("energy/3", "types")]
    [InlineData("/energy/3?tab=history", "types")]
    [InlineData("solar", "views")]
    [InlineData("consumables?period=ytd", "views")]
    [InlineData("admin/tariffs", "config")]
    [InlineData("http://localhost:8760/admin/settings", "config")]
    [InlineData("", null)]
    [InlineData("meters/5", null)]
    [InlineData("trends", null)]
    [InlineData("import", null)]
    public void The_group_holding_a_route_is_known(string path, string? group) =>
        Assert.Equal(group, NavGroups.GroupFor(path));

    [Fact]
    public void Nav_state_starts_from_the_request_cookie()
    {
        var state = new NavState();
        Assert.Null(state.SavedGroups);

        state.InitializeGroups("config");
        Assert.Equal(["config"], state.SavedGroups!);

        var raised = 0;
        state.MetersChanged += () => raised++;
        state.NotifyMetersChanged();
        Assert.Equal(1, raised);
    }

    [Theory]
    [InlineData("dark", true)]
    [InlineData("LIGHT", false)]
    [InlineData(" light ", false)]
    [InlineData("sepia", null)]
    [InlineData(null, null)]
    public void The_theme_cookie_names_a_mode(string? cookie, bool? dark) =>
        Assert.Equal(dark, ThemeState.Parse(cookie));

    [Fact]
    public void The_theme_defaults_to_dark_and_tokens_round_trip()
    {
        Assert.True(ThemeState.DefaultIsDark);
        Assert.True(ThemeState.Parse(ThemeState.Token(true)));
        Assert.False(ThemeState.Parse(ThemeState.Token(false)));
    }
}