@page "/"
@using RackPeek.Domain.Graph.Serialisers
@using RackPeek.Domain.Graph.UseCases
@using RackPeek.Domain.Resources
@using RackPeek.Domain.Resources.Hardware
@using RackPeek.Domain.Resources.Services.UseCases
@using RackPeek.Domain.Resources.SystemResources.UseCases
@using Shared.Rcl.Components
@using Shared.Rcl.Components.Graphs
@inject GetSystemSummaryUseCase SystemSummaryUseCase
@inject GetServiceSummaryUseCase ServiceSummaryUseCase
@inject GetHardwareUseCaseSummary HardwareSummaryUseCase
@inject BuildPhysicalTopologyUseCase TopologyUseCase
@inject BuildLogicalGraphUseCase LogicalUseCase

<PageTitle>Home</PageTitle>

<div class="min-h-screen bg-zinc-950 text-zinc-200 font-mono p-6">

    @if (_loading)
    {
        <div class="text-zinc-500">loading summary…</div>
    }
    else
    {
        <!--
            Uniform-height card grid. Every card is `h-80` regardless of content;
            taller content scrolls inside. `grid-flow-dense` packs the wider
            diagram cards without leaving holes.
        -->
        <div class="grid grid-cols-1 sm:grid-cols-2 lg:grid-cols-3 xl:grid-cols-4 auto-rows-[20rem] grid-flow-dense gap-4">

            <!-- Totals -->
            <div class="@_cardClass">
                <div class="@_cardHeaderClass">Totals</div>
                <div class="@_cardBodyClass">
                    <div class="grid grid-cols-2 gap-y-2 text-sm">
                        <div class="hover:text-emerald-300">
                            <NavLink href="hardware/tree">→ Hardware</NavLink>
                        </div>
                        <div class="text-right">@_hardware!.TotalHardware</div>

                        <div class="hover:text-emerald-300">
                            <NavLink href="systems/list">→ Systems</NavLink>
                        </div>
                        <div class="text-right">@_system!.TotalSystems</div>

                        <div class="hover:text-emerald-300">
                            <NavLink href="services/list">→ Services</NavLink>
                        </div>
                        <div class="text-right">@_service!.TotalServices</div>
                    </div>
                </div>
            </div>

            <!-- Tools -->
            <div class="@_cardClass">
                <div class="@_cardHeaderClass">Tools</div>
                <div class="@_cardBodyClass">
                    <ul class="space-y-2 text-sm">
                        <li><NavLink href="visualise" class="block hover:text-emerald-300" data-testid="home-tool-visualise">→ Visualise</NavLink></li>
                        <li><NavLink href="subnets" class="block hover:text-emerald-300" data-testid="home-tool-subnets">→ Subnet Browser</NavLink></li>
                        <li><NavLink href="cli" class="block hover:text-emerald-300" data-testid="home-tool-cli">→ CLI Emulator</NavLink></li>
                        <li><NavLink href="yaml" class="block hover:text-emerald-300" data-testid="home-tool-yaml">→ YAML Editor</NavLink></li>
                        <li><NavLink href="ansible/inventory" class="block hover:text-emerald-300" data-testid="home-tool-ansible">→ Ansible Inventory Generator</NavLink></li>
                        <li><NavLink href="ssh/export" class="block hover:text-emerald-300" data-testid="home-tool-ssh">→ SSH Config Export</NavLink></li>
                        <li><NavLink href="hosts/export" class="block hover:text-emerald-300" data-testid="home-tool-hosts">→ Hosts File Export</NavLink></li>
                        <li><NavLink href="docs" class="block hover:text-emerald-300" data-testid="home-tool-docs">→ Documentation</NavLink></li>
                    </ul>
                </div>
            </div>

            <!-- Physical / Hardware topology -->
            <div class="@_cardClass sm:col-span-2 sm:row-span-2">
                <div class="flex items-center justify-between mb-3 flex-shrink-0">
                    <div class="text-xs text-zinc-500 uppercase tracking-wider">Physical Topology</div>
                    <NavLink href="visualise/topology"
                             class="text-xs text-zinc-400 hover:text-emerald-400"
                             data-testid="home-topology-open">
                        open →
                    </NavLink>
                </div>
                <div class="flex-1 min-h-0 overflow-hidden">
                    <GraphView Source="@_topologySource" TestId="home-topology-preview"/>
                </div>
            </div>

            <!-- Logical / Services & Systems -->
            <div class="@_cardClass sm:col-span-2 sm:row-span-2">
                <div class="flex items-center justify-between mb-3 flex-shrink-0">
                    <div class="text-xs text-zinc-500 uppercase tracking-wider">Logical View</div>
                    <NavLink href="visualise/logical"
                             class="text-xs text-zinc-400 hover:text-emerald-400"
                             data-testid="home-logical-open">
                        open →
                    </NavLink>
                </div>
                <div class="flex-1 min-h-0 overflow-hidden">
                    <GraphView Source="@_logicalSource" TestId="home-logical-preview"/>
                </div>
            </div>

            <!-- Tags (component renders its own internal header) -->
            <div class="@_cardClass">
                <div class="@_cardBodyClass">
                    <TagListComponent/>
                </div>
            </div>

            <!-- Labels -->
            <div class="@_cardClass">
                <div class="@_cardBodyClass">
                    <LabelListComponent/>
                </div>
            </div>

            <!-- Hardware breakdown -->
            <div class="@_cardClass">
                <div class="@_cardHeaderClass">Hardware</div>
                <div class="@_cardBodyClass">
                    <ul class="space-y-2 text-sm">
                        <li class="text-zinc-100">├─ Hardware (@_hardware!.TotalHardware)</li>

                        @if (_hardware.HardwareByKind.Any())
                        {
                            <ul class="ml-4 mt-2 border-l border-zinc-800 pl-4 space-y-1">
                                @foreach (var (kind, count) in _hardware.HardwareByKind.OrderByDescending(x => x.Value))
                                {
                                    var pluralKind = Resource.KindToPlural(kind);
                                    <NavLink href="@($"/{Uri.EscapeDataString(pluralKind)}/list")" class="block">
                                        <li class="text-zinc-500 hover:text-emerald-300">
                                            └─ @pluralKind (@count)
                                        </li>
                                    </NavLink>
                                }
                            </ul>
                        }
                    </ul>
                </div>
            </div>

            <!-- Systems breakdown -->
            <div class="@_cardClass">
                <div class="@_cardHeaderClass">Systems</div>
                <div class="@_cardBodyClass">
                    <ul class="space-y-3 text-sm">
                        <li>
                            <div class="text-zinc-100">├─ Total (@_system!.TotalSystems)</div>

                            @if (_system.SystemsByType.Any())
                            {
                                <ul class="ml-4 mt-2 border-l border-zinc-800 pl-4 space-y-1">
                                    <li class="text-zinc-400">Types</li>
                                    @foreach (var (type, count) in _system.SystemsByType.OrderByDescending(x => x.Value))
                                    {
                                        <li class="text-zinc-500 hover:text-emerald-300">
                                            <NavLink href="@($"systems/list?type={Uri.EscapeDataString(type)}")" class="block">
                                                └─ @type (@count)
                                            </NavLink>
                                        </li>
                                    }
                                </ul>
                            }

                            @if (_system.SystemsByOs.Any())
                            {
                                <ul class="ml-4 mt-2 border-l border-zinc-800 pl-4 space-y-1">
                                    <li class="text-zinc-400">Operating Systems</li>
                                    @foreach (var (os, count) in _system.SystemsByOs.OrderByDescending(x => x.Value))
                                    {
                                        <li class="text-zinc-500 hover:text-emerald-300">
                                            <NavLink href="@($"systems/list?os={Uri.EscapeDataString(os)}")" class="block">
                                                └─ @os (@count)
                                            </NavLink>
                                        </li>
                                    }
                                </ul>
                            }
                        </li>
                    </ul>
                </div>
            </div>

            <!-- Services breakdown -->
            <div class="@_cardClass">
                <div class="@_cardHeaderClass">Services</div>
                <div class="@_cardBodyClass">
                    <ul class="text-sm">
                        <li class="text-zinc-100">├─ Total (@_service!.TotalServices)</li>
                        <li class="ml-4 text-zinc-500">└─ IP Addresses (@_service!.TotalIpAddresses)</li>
                    </ul>
                </div>
            </div>
        </div>
    }
</div>

@code {
    private bool _loading = true;

    private SystemSummary? _system;
    private AllServicesSummary? _service;
    private HardwareSummary? _hardware;
    private string? _topologySource;
    private string? _logicalSource;

    private static readonly MermaidSerialiser _serialiser = new();

    // Shared card chrome — defined once so every card looks identical.
    // Card height is set by the parent grid's `auto-rows-[20rem]`; cards
    // that span multiple rows (e.g. diagram cards with `row-span-2`) get
    // the combined height plus gap automatically.
    private const string _cardClass =
        "border border-zinc-800 rounded-md p-4 bg-zinc-900/30 flex flex-col overflow-hidden";
    private const string _cardHeaderClass =
        "text-xs text-zinc-500 uppercase tracking-wider mb-3 flex-shrink-0";
    private const string _cardBodyClass =
        "flex-1 min-h-0 overflow-y-auto pr-1";

    protected override async Task OnInitializedAsync()
    {
        Task<SystemSummary> systemTask = SystemSummaryUseCase.ExecuteAsync();
        Task<AllServicesSummary> serviceTask = ServiceSummaryUseCase.ExecuteAsync();
        Task<HardwareSummary> hardwareTask = HardwareSummaryUseCase.ExecuteAsync();
        Task<RackPeek.Domain.Graph.Graph> topologyTask = TopologyUseCase.ExecuteAsync();
        Task<RackPeek.Domain.Graph.Graph> logicalTask = LogicalUseCase.ExecuteAsync();

        await Task.WhenAll(systemTask, serviceTask, hardwareTask, topologyTask, logicalTask);

        _system = systemTask.Result;
        _service = serviceTask.Result;
        _hardware = hardwareTask.Result;
        _topologySource = _serialiser.Serialise(topologyTask.Result);
        _logicalSource = _serialiser.Serialise(logicalTask.Result);

        _loading = false;
    }
}