RackPeek/Shared.Rcl/Layout/MainLayout.razor

@using RackPeek.Domain
@using Shared.Rcl.Components
@inherits LayoutComponentBase
@implements IAsyncDisposable

@inject NavigationManager Nav
@inject IJSRuntime JS

<!-- Flips to true only after the first interactive render, which cannot happen on
     the prerendered HTML. Tests wait on it before typing: input events sent before
     the circuit attaches are silently lost and never reach the server-side model. -->
<span hidden data-testid="circuit-probe" data-circuit-ready="@(_circuitReady ? "true" : "false")"></span>

<div class="min-h-screen bg-zinc-950 text-zinc-200 font-mono"
     data-testid="app-root">

    <header class="border-b border-zinc-800 bg-zinc-900" data-testid="app-header">

        <!-- Top row: brand + search (always visible) + nav cluster | mobile dropdown -->
        <div class="flex items-center gap-3 sm:gap-4 px-6 sm:px-8 lg:px-12 py-4">
            <NavLink href=""
                     data-testid="brand-link"
                     class="hover:text-emerald-400 flex-shrink-0"
                     activeClass="text-emerald-400 font-semibold">

                <div class="flex items-baseline gap-2"
                     data-testid="brand-text">
                    <span class="text-xl font-bold text-emerald-400 tracking-wider">rackpeek</span>
                    <span class="text-[10px] text-zinc-500 tracking-wide">@RpkConstants.Version</span>
                </div>
            </NavLink>

            <!-- Single search instance, sized responsively. Sits next to the
                 brand on the left at every viewport — fills available space
                 between brand and the nav cluster. -->
            <div class="flex-1 min-w-0 max-w-[180px] sm:max-w-[240px] min-[1000px]:max-w-xs xl:max-w-md">
                <GlobalSearch/>
            </div>

            <!-- Desktop: git + nav pushed to the right -->
            <div class="hidden min-[1000px]:flex items-center gap-5 ml-auto flex-shrink-0">
                @if (RpkConstants.HasGitServices)
                {
                    <GitStatusIndicator/>
                }

                <nav class="flex items-center gap-4 text-sm" data-testid="main-nav">
                    @foreach (NavItem item in NavItems)
                    {
                        <NavLink href="@item.Href"
                                 Match="@item.Match"
                                 class="hover:text-emerald-400"
                                 activeClass="text-emerald-400 font-semibold"
                                 data-testid="@($"nav-{item.TestId}")">
                            @item.Label
                        </NavLink>
                    }
                </nav>
            </div>

            <!-- Mobile: page dropdown anchored to the right -->
            <div class="min-[1000px]:hidden ml-auto relative flex-shrink-0" id="rpk-mobile-nav">
                <button class="flex items-center gap-2 px-3 py-1.5 text-sm rounded border border-zinc-800 text-zinc-200 hover:text-emerald-400 hover:border-zinc-700"
                        data-testid="nav-toggle"
                        aria-haspopup="menu"
                        aria-expanded="@(_dropdownOpen ? "true" : "false")"
                        @onclick="ToggleDropdown">
                    <span>@CurrentPageLabel</span>
                    <svg xmlns="http://www.w3.org/2000/svg" class="w-4 h-4" fill="none" viewBox="0 0 24 24"
                         stroke="currentColor" stroke-width="2">
                        @if (_dropdownOpen)
                        {
                            <path stroke-linecap="round" stroke-linejoin="round" d="M5 15l7-7 7 7"/>
                        }
                        else
                        {
                            <path stroke-linecap="round" stroke-linejoin="round" d="M19 9l-7 7-7-7"/>
                        }
                    </svg>
                </button>

                @if (_dropdownOpen)
                {
                    <div class="absolute right-0 mt-2 w-52 bg-zinc-900 border border-zinc-800 rounded shadow-lg overflow-hidden z-50"
                         data-testid="mobile-nav"
                         role="menu">
                        @foreach (NavItem item in NavItems)
                        {
                            <NavLink href="@item.Href"
                                     Match="@item.Match"
                                     class="block px-3 py-2 text-sm border-b border-zinc-800 last:border-b-0 hover:text-emerald-400 hover:bg-zinc-800/50"
                                     activeClass="text-emerald-400 bg-emerald-500/10"
                                     data-testid="@($"nav-mobile-{item.TestId}")"
                                     @onclick="CloseDropdown">
                                @item.Label
                            </NavLink>
                        }
                    </div>
                }
            </div>

            <!-- Community / source links — anchored to the far right of the
                 header at every breakpoint. The two clusters above carry
                 `ml-auto`; this group sits immediately to their right. -->
            <div class="flex items-center gap-3 flex-shrink-0">
                <a href="https://github.com/Timmoth/RackPeek"
                   target="_blank"
                   rel="noopener noreferrer"
                   aria-label="RackPeek on GitHub"
                   class="text-zinc-400 hover:text-emerald-400 transition"
                   data-testid="social-github">
                    <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"
                         fill="currentColor" class="w-5 h-5">
                        <path d="M12 .297c-6.63 0-12 5.373-12 12 0 5.303 3.438 9.8 8.205 11.385.6.113.82-.258.82-.577 0-.285-.01-1.04-.015-2.04-3.338.724-4.042-1.61-4.042-1.61C4.422 18.07 3.633 17.7 3.633 17.7c-1.087-.744.084-.729.084-.729 1.205.084 1.838 1.236 1.838 1.236 1.07 1.835 2.809 1.305 3.495.998.108-.776.417-1.305.76-1.605-2.665-.3-5.466-1.332-5.466-5.93 0-1.31.465-2.38 1.235-3.22-.135-.303-.54-1.523.105-3.176 0 0 1.005-.322 3.3 1.23.96-.267 1.98-.399 3-.405 1.02.006 2.04.138 3 .405 2.28-1.552 3.285-1.23 3.285-1.23.645 1.653.24 2.873.12 3.176.765.84 1.23 1.91 1.23 3.22 0 4.61-2.805 5.625-5.475 5.92.42.36.81 1.096.81 2.22 0 1.606-.015 2.896-.015 3.286 0 .315.21.69.825.57C20.565 22.092 24 17.592 24 12.297c0-6.627-5.373-12-12-12"/>
                    </svg>
                </a>
                <a href="https://discord.gg/egXRPdesee"
                   target="_blank"
                   rel="noopener noreferrer"
                   aria-label="Join the RackPeek Discord"
                   class="text-zinc-400 hover:text-emerald-400 transition"
                   data-testid="social-discord">
                    <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"
                         fill="currentColor" class="w-5 h-5">
                        <path d="M20.317 4.37a19.791 19.791 0 0 0-4.885-1.515.074.074 0 0 0-.079.037c-.21.375-.444.864-.608 1.25a18.27 18.27 0 0 0-5.487 0 12.64 12.64 0 0 0-.617-1.25.077.077 0 0 0-.079-.037A19.736 19.736 0 0 0 3.677 4.37a.07.07 0 0 0-.032.027C.533 9.046-.32 13.58.099 18.057a.082.082 0 0 0 .031.057 19.9 19.9 0 0 0 5.993 3.03.078.078 0 0 0 .084-.028 14.09 14.09 0 0 0 1.226-1.994.076.076 0 0 0-.041-.106 13.107 13.107 0 0 1-1.872-.892.077.077 0 0 1-.008-.128 10.2 10.2 0 0 0 .372-.292.074.074 0 0 1 .077-.01c3.928 1.793 8.18 1.793 12.062 0a.074.074 0 0 1 .078.01c.12.098.246.198.373.292a.077.077 0 0 1-.006.127 12.299 12.299 0 0 1-1.873.892.077.077 0 0 0-.041.107c.36.698.772 1.362 1.225 1.993a.076.076 0 0 0 .084.028 19.839 19.839 0 0 0 6.002-3.03.077.077 0 0 0 .032-.054c.5-5.177-.838-9.674-3.549-13.66a.061.061 0 0 0-.031-.03zM8.02 15.33c-1.183 0-2.157-1.085-2.157-2.419 0-1.333.956-2.419 2.157-2.419 1.21 0 2.176 1.096 2.157 2.42 0 1.333-.956 2.418-2.157 2.418zm7.975 0c-1.183 0-2.157-1.085-2.157-2.419 0-1.333.955-2.419 2.157-2.419 1.21 0 2.176 1.096 2.157 2.42 0 1.333-.946 2.418-2.157 2.418z"/>
                    </svg>
                </a>
            </div>
        </div>

        <!-- Mobile-only second row: git status (only shown when configured) -->
        @if (RpkConstants.HasGitServices)
        {
            <div class="min-[1000px]:hidden border-t border-zinc-800 px-6 py-3">
                <GitStatusIndicator/>
            </div>
        }
    </header>

    <main class="p-6" data-testid="page-content">
        @Body
    </main>

</div>

@code {
    private const string _outsideDismissId = "rpk-mobile-nav";
    private const string _containerSelector = "#rpk-mobile-nav";

    private bool _circuitReady;
    private bool _dropdownOpen;
    private bool _listenerRegistered;
    private DotNetObjectReference<MainLayout>? _selfRef;

    protected override void OnInitialized()
    {
        _selfRef = DotNetObjectReference.Create(this);
        Nav.LocationChanged += HandleLocationChanged;
    }

    private void HandleLocationChanged(object? sender, LocationChangedEventArgs e) =>
        InvokeAsync(StateHasChanged);

    private void ToggleDropdown() => _dropdownOpen = !_dropdownOpen;

    private void CloseDropdown() => _dropdownOpen = false;

    [JSInvokable]
    public Task DismissDropdownFromJs()
    {
        if (!_dropdownOpen) return Task.CompletedTask;
        _dropdownOpen = false;
        return InvokeAsync(StateHasChanged);
    }

    protected override async Task OnAfterRenderAsync(bool firstRender)
    {
        // OnAfterRender never runs during prerendering, so this re-render proves a
        // live circuit to anything watching the probe above.
        if (firstRender && !_circuitReady)
        {
            _circuitReady = true;
            StateHasChanged();
        }

        // Mirror the dropdown state into the JS dismiss-listener registration
        // so the listener only exists while it's needed.
        if (_dropdownOpen && !_listenerRegistered)
        {
            await JS.InvokeVoidAsync(
                "rackpeekUi.registerOutsideDismiss",
                _outsideDismissId,
                _containerSelector,
                _selfRef,
                nameof(DismissDropdownFromJs));
            _listenerRegistered = true;
        }
        else if (!_dropdownOpen && _listenerRegistered)
        {
            await JS.InvokeVoidAsync("rackpeekUi.unregisterOutsideDismiss", _outsideDismissId);
            _listenerRegistered = false;
        }
    }

    public async ValueTask DisposeAsync()
    {
        Nav.LocationChanged -= HandleLocationChanged;

        if (_listenerRegistered)
        {
            try { await JS.InvokeVoidAsync("rackpeekUi.unregisterOutsideDismiss", _outsideDismissId); }
            catch { /* page unloading */ }
        }

        _selfRef?.Dispose();
    }

    private string CurrentPageLabel
    {
        get
        {
            var path = Nav.ToBaseRelativePath(Nav.Uri).Split('?')[0].Split('#')[0].Trim('/');
            NavItem? best = null;
            var bestLength = -1;

            foreach (NavItem item in NavItems)
            {
                if (!Matches(path, item)) continue;
                if (item.Href.Length > bestLength)
                {
                    best = item;
                    bestLength = item.Href.Length;
                }
            }

            return best?.Label ?? "Menu";
        }
    }

    private static bool Matches(string path, NavItem item)
    {
        if (item.Match == NavLinkMatch.All)
            return string.Equals(path, item.Href, StringComparison.OrdinalIgnoreCase);

        // Prefix match — but never let the empty-string "Home" entry win as
        // a prefix of every route.
        if (string.IsNullOrEmpty(item.Href)) return false;
        return path.Equals(item.Href, StringComparison.OrdinalIgnoreCase)
               || path.StartsWith(item.Href + "/", StringComparison.OrdinalIgnoreCase);
    }

    private static readonly NavItem[] NavItems =
    {
        new("", "home", "Home", NavLinkMatch.All),
        new("cli", "cli", "CLI"),
        new("yaml", "yaml", "Yaml"),
        new("hardware/tree", "hardware", "Hardware"),
        new("systems/list", "systems", "Systems"),
        new("services/list", "services", "Services"),
        new("visualise", "visualise", "Visualise"),
        new("docs", "docs", "Docs")
    };

    private sealed record NavItem(string Href, string TestId, string Label, NavLinkMatch Match = NavLinkMatch.Prefix);
}