AtomUI/tests/AtomUI.Desktop.Controls.Tests/NavMenu/NavMenuThemeContractTests.cs

using System.IO;
using Shouldly;
using Xunit;

namespace AtomUI.Desktop.Controls.Tests.NavMenu;

public class NavMenuThemeContractTests
{
    [Fact]
    public void NavMenu_Root_Background_Uses_Component_ItemBg_Token_Without_Right_Divider()
    {
        var source = ReadRepoFile("src/AtomUI.Desktop.Controls/NavMenu/Themes/NavMenuTheme.axaml");

        source.ShouldContain("<Setter Property=\"Background\" Value=\"{atom:NavMenuTokenResource ItemBg}\" />");
        source.ShouldContain("<Setter Property=\"Background\" Value=\"{atom:NavMenuTokenResource DarkMenuBg}\" />");
        source.ShouldContain("<Setter Property=\"BorderThickness\" Value=\"0\" />");
        source.ShouldContain("<Setter Property=\"IsVisible\" Value=\"False\" />");
        source.ShouldNotContain("<Setter Property=\"BorderThickness\" Value=\"0,0,1,0\" />");
        source.ShouldNotContain("<Setter Property=\"Background\" Value=\"Transparent\" />");
        source.ShouldNotContain("<Setter Property=\"Background\" Value=\"{atom:SharedTokenResource ColorBgContainer}\" />");
        source.ShouldNotContain("<Setter Property=\"Background\" Value=\"{atom:NavMenuTokenResource DarkMenuPopupBg}\" />");
    }

    [Fact]
    public void Inline_Submenu_Container_Uses_Submenu_Background_Tokens()
    {
        var source = ReadRepoFile("src/AtomUI.Desktop.Controls/NavMenu/Themes/NavMenuItemTheme.axaml");

        source.ShouldContain("Name=\"PART_ChildItemsFrame\"");
        source.ShouldContain("Value=\"{atom:NavMenuTokenResource SubMenuItemBg}\"");
        source.ShouldContain("Value=\"{atom:NavMenuTokenResource DarkSubMenuItemBg}\"");
    }

    [Fact]
    public void Item_Background_Control_Is_Public_And_Forwarded_To_Internal_Menu_Parts()
    {
        var navMenuSource       = ReadRepoFile("src/AtomUI.Desktop.Controls/NavMenu/NavMenu.cs");
        var navMenuItemSource   = ReadRepoFile("src/AtomUI.Desktop.Controls/NavMenu/NavMenuItem.cs");
        var headerSource        = ReadRepoFile("src/AtomUI.Desktop.Controls/NavMenu/Header/BaseNavMenuItemHeader.cs");
        var navMenuThemeSource  = ReadRepoFile("src/AtomUI.Desktop.Controls/NavMenu/Themes/NavMenuItemTheme.axaml");

        navMenuSource.ShouldContain("public static readonly StyledProperty<bool> IsItemBackgroundEnabledProperty");
        navMenuSource.ShouldContain("AvaloniaProperty.Register<NavMenu, bool>(nameof(IsItemBackgroundEnabled), true)");
        navMenuSource.ShouldContain("public bool IsItemBackgroundEnabled");
        navMenuSource.ShouldContain("menuItem[!NavMenuItem.IsItemBackgroundEnabledProperty] = this[!IsItemBackgroundEnabledProperty];");

        navMenuItemSource.ShouldContain("internal static readonly StyledProperty<bool> IsItemBackgroundEnabledProperty");
        navMenuItemSource.ShouldContain("menuItem[!NavMenuItem.IsItemBackgroundEnabledProperty] = this[!IsItemBackgroundEnabledProperty];");
        headerSource.ShouldContain("internal static readonly StyledProperty<bool> IsItemBackgroundEnabledProperty");
        navMenuThemeSource.ShouldContain("IsItemBackgroundEnabled=\"{TemplateBinding IsItemBackgroundEnabled}\"");
    }

    [Fact]
    public void Disabled_Item_Background_Mode_Gates_Item_Background_Without_Gating_Header_Backgrounds()
    {
        var headerThemeSource      = ReadRepoFile("src/AtomUI.Desktop.Controls/NavMenu/Themes/BaseNavMenuItemHeaderTheme.axaml");
        var horizontalThemeSource  = ReadRepoFile("src/AtomUI.Desktop.Controls/NavMenu/Themes/HorizontalNavMenuItemHeaderTheme.axaml");
        var navMenuItemThemeSource = ReadRepoFile("src/AtomUI.Desktop.Controls/NavMenu/Themes/NavMenuItemTheme.axaml");

        headerThemeSource.ShouldNotContain("Selector=\"^[IsItemBackgroundEnabled=True]\"");
        headerThemeSource.ShouldNotContain("Selector=\"^[IsItemBackgroundEnabled=False]\"");
        horizontalThemeSource.ShouldNotContain("Selector=\"^[IsItemBackgroundEnabled=True]\"");
        horizontalThemeSource.ShouldNotContain("Selector=\"^[IsItemBackgroundEnabled=False]\"");

        navMenuItemThemeSource.ShouldContain("Selector=\"^[IsItemBackgroundEnabled=True]\"");
        navMenuItemThemeSource.ShouldContain("Selector=\"^[IsItemBackgroundEnabled=False]\"");
        navMenuItemThemeSource.ShouldContain("Selector=\"^ /template/ Border#PART_ChildItemsFrame\"");
        navMenuItemThemeSource.ShouldContain("<Setter Property=\"Background\" Value=\"Transparent\" />");
    }

    [Fact]
    public void Block_And_Popup_Item_Header_Backgrounds_Use_Content_Margin()
    {
        var inlineHeaderSource = ReadRepoFile("src/AtomUI.Desktop.Controls/NavMenu/Themes/InlineNavMenuItemHeaderTheme.axaml");
        var verticalHeaderSource = ReadRepoFile("src/AtomUI.Desktop.Controls/NavMenu/Themes/VerticalNavMenuItemHeaderTheme.axaml");
        var horizontalHeaderSource = ReadRepoFile("src/AtomUI.Desktop.Controls/NavMenu/Themes/HorizontalNavMenuItemHeaderTheme.axaml");

        inlineHeaderSource.ShouldContain("<Setter Property=\"Margin\" Value=\"{atom:NavMenuTokenResource ItemContentMargin}\" />");
        verticalHeaderSource.ShouldContain("<Setter Property=\"Margin\" Value=\"{atom:NavMenuTokenResource ItemContentMargin}\" />");
        horizontalHeaderSource.ShouldContain("Selector=\"^[IsTopLevel=False]\"");
        horizontalHeaderSource.ShouldContain("<Setter Property=\"Margin\" Value=\"{atom:NavMenuTokenResource ItemContentMargin}\" />");
    }

    [Fact]
    public void Popup_Frame_Uses_Component_Popup_Background_Token()
    {
        var source = ReadRepoFile("src/AtomUI.Desktop.Controls/NavMenu/Themes/NavMenuItemTheme.axaml");

        source.ShouldContain("Value=\"{atom:NavMenuTokenResource MenuPopupBg}\"");
        source.ShouldNotContain("Value=\"{atom:SharedTokenResource ColorBgElevated}\"");
    }

    [Fact]
    public void Inline_And_Vertical_Pressed_State_Does_Not_Style_Header_From_Ancestor_NavMenuItem()
    {
        var source = ReadRepoFile("src/AtomUI.Desktop.Controls/NavMenu/Themes/NavMenuItemTheme.axaml");

        source.ShouldNotContain(":pressed:not(:selected):not(^[IsDarkStyle=True])");
        source.ShouldNotContain("Value=\"{atom:NavMenuTokenResource ItemActiveBg}\"");
    }

    [Fact]
    public void Keyboard_Active_Visual_Is_Header_State_And_Does_Not_ReUse_Selected_State()
    {
        var headerSource      = ReadRepoFile("src/AtomUI.Desktop.Controls/NavMenu/Themes/BaseNavMenuItemHeaderTheme.axaml");
        var navMenuItemSource = ReadRepoFile("src/AtomUI.Desktop.Controls/NavMenu/Themes/NavMenuItemTheme.axaml");

        navMenuItemSource.ShouldContain("IsKeyboardActive=\"{TemplateBinding IsKeyboardActive}\"");
        headerSource.ShouldContain("Selector=\"^[IsKeyboardActive=True]:not(^[IsSelected=True])\"");
        headerSource.ShouldNotContain("Selector=\"^[IsKeyboardActive=True]:not(^[IsSelected=True]):not(^[IsInSelectedPath=True])\"");
        headerSource.ShouldContain("Value=\"{atom:NavMenuTokenResource ItemActiveBg}\"");
        headerSource.ShouldContain("Value=\"{atom:NavMenuTokenResource DarkItemHoverBg}\"");
    }

    [Fact]
    public void Submenu_Title_Hover_Uses_Foreground_And_Background_Tokens()
    {
        var source = ReadRepoFile("src/AtomUI.Desktop.Controls/NavMenu/Themes/BaseNavMenuItemHeaderTheme.axaml");

        source.ShouldContain("Value=\"{atom:NavMenuTokenResource ItemHoverColor}\"");
        source.ShouldContain("Value=\"{atom:NavMenuTokenResource ItemHoverBg}\"");
        source.ShouldContain("Value=\"{atom:NavMenuTokenResource DarkItemHoverColor}\"");
        source.ShouldContain("Value=\"{atom:NavMenuTokenResource DarkItemHoverBg}\"");
    }

    [Fact]
    public void NavMenu_Tokens_Keep_Root_And_Header_Background_Semantics_Separate()
    {
        var tokenSource = ReadRepoFile("src/AtomUI.Desktop.Controls/NavMenu/NavMenuToken.cs");
        var headerSource = ReadRepoFile("src/AtomUI.Desktop.Controls/NavMenu/Themes/BaseNavMenuItemHeaderTheme.axaml");

        tokenSource.ShouldContain("ItemBg                      = SharedToken.ColorBgContainer;");
        headerSource.ShouldContain("<Setter Property=\"Background\" Value=\"Transparent\" />");
    }

    [Fact]
    public void Inline_Collapsed_Uses_Effective_Mode_And_Axaml_Visual_State()
    {
        var navMenuSource       = ReadRepoFile("src/AtomUI.Desktop.Controls/NavMenu/NavMenu.cs");
        var navMenuThemeSource  = ReadRepoFile("src/AtomUI.Desktop.Controls/NavMenu/Themes/NavMenuTheme.axaml");
        var navMenuItemTheme    = ReadRepoFile("src/AtomUI.Desktop.Controls/NavMenu/Themes/NavMenuItemTheme.axaml");
        var verticalHeaderTheme = ReadRepoFile("src/AtomUI.Desktop.Controls/NavMenu/Themes/VerticalNavMenuItemHeaderTheme.axaml");

        navMenuSource.ShouldContain("public static readonly StyledProperty<bool> IsInlineCollapsedProperty");
        navMenuSource.ShouldContain("public static readonly StyledProperty<double> InlineCollapsedWidthProperty");
        navMenuSource.ShouldContain("internal static readonly StyledProperty<double> InlineCollapsedLayoutWidthProperty");
        navMenuSource.ShouldContain("menuItem[!NavMenuItem.ModeProperty]                  = this[!EffectiveModeProperty];");
        navMenuSource.ShouldContain("menuItem[!NavMenuItem.IsInlineCollapsedProperty]     = this[!IsEffectiveInlineCollapsedProperty];");
        navMenuSource.ShouldNotContain("Layoutable.MaxWidthProperty");
        navMenuSource.ShouldNotContain("Layoutable.WidthProperty,\n                BindingMode.OneWay,\n                BindingPriority.Animation");
        navMenuSource.ShouldContain("WidthProperty.OverrideMetadata<NavMenu>");
        navMenuSource.ShouldContain("RunInlineCollapsedWidthMotionAsync");

        navMenuThemeSource.ShouldContain("<Setter Property=\"InlineCollapsedWidth\" Value=\"{atom:NavMenuTokenResource InlineCollapsedWidth}\" />");
        navMenuThemeSource.ShouldNotContain("<DoubleTransition Property=\"Width\"");
        navMenuThemeSource.ShouldNotContain("{Binding InlineCollapsedWidth");
        navMenuItemTheme.ShouldContain("IsInlineCollapsed=\"{TemplateBinding IsInlineCollapsed}\"");

        verticalHeaderTheme.ShouldContain("Selector=\"^[IsInlineCollapsed=True]\"");
        verticalHeaderTheme.ShouldContain("Value=\"{atom:NavMenuTokenResource CollapsedIconSize}\"");
        verticalHeaderTheme.ShouldContain("FirstCharacterConverter");
    }

    private static string ReadRepoFile(string relativePath)
    {
        var directory = new DirectoryInfo(AppContext.BaseDirectory);
        while (directory is not null)
        {
            var candidate = Path.Combine(directory.FullName, relativePath);
            if (File.Exists(candidate))
            {
                return File.ReadAllText(candidate);
            }

            directory = directory.Parent;
        }

        throw new FileNotFoundException($"Could not find repository file: {relativePath}");
    }
}