@page "/labels/{LabelName}"
@using RackPeek.Domain.Persistence
@using RackPeek.Domain.Resources
@using RackPeek.Domain.Resources.SystemResources

@inject IResourceCollection ResourceRepository

<PageTitle>Label: @LabelName</PageTitle>

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

    <!-- Header -->
    <div class="space-y-2">
        <h1 class="text-lg text-zinc-100">
            Label: <span class="text-emerald-400">@LabelName</span>
        </h1>
    </div>

    <!-- Controls -->
    @if (_resources is not null && _resources.Count > 0)
    {
        <div class="flex flex-wrap gap-4 items-center text-xs">

            <!-- Filter -->
            <input placeholder="filter resources..."
                   class="bg-zinc-900 border border-zinc-800 px-3 py-1 rounded focus:outline-none focus:border-emerald-600"
                   @bind="_filter"/>

            <!-- Sort By -->
            <select class="bg-zinc-900 border border-zinc-800 px-2 py-1 rounded"
                    @bind="_sortBy">
                <option value="Value">Value</option>
                <option value="Name">Name</option>
                <option value="Kind">Kind</option>
            </select>

            <!-- Direction -->
            <button class="border border-zinc-800 px-3 py-1 rounded hover:border-emerald-600"
                    @onclick="ToggleSortDirection">
                @(_ascending ? "Asc ↑" : "Desc ↓")
            </button>

        </div>
    }

    <!-- Content -->
    @if (_resources is null)
    {
        <div class="text-zinc-500">loading resources…</div>
    }
    else if (_resources.Count == 0)
    {
        <div class="text-zinc-500">no resources found for this label</div>
    }
    else if (!GetProcessed().Any())
    {
        <div class="text-zinc-500">no results match your filter</div>
    }
    else
    {
        <div class="space-y-3">
            @foreach (var item in GetProcessed())
            {
                var resource = item.Resource;
                var value = item.Value;

                <div class="border border-zinc-800 rounded p-3 bg-zinc-900 hover:border-emerald-700 transition">
                    <NavLink href="@GetResourceUrl(resource)"
                             class="block hover:text-emerald-300">

                        <div class="flex justify-between items-center">
                            <div class="text-zinc-100">
                                @resource.Name
                            </div>

                            <div class="text-xs text-zinc-500 uppercase tracking-wide">
                                @resource.Kind
                            </div>
                        </div>

                        <!-- Label value -->
                        <div class="mt-2 text-xs text-emerald-400 flex items-center gap-2">
                            <span>
                                Value: @FormatValue(value)
                            </span>

                            <span class="text-zinc-500 uppercase text-[10px] tracking-wide">
                                [@DetectType(value)]
                            </span>
                        </div>

                    </NavLink>
                </div>
            }
        </div>
    }

</div>

@code {
    [Parameter] public string LabelName { get; set; } = string.Empty;

    private IReadOnlyList<(Resource Resource, string Value)>? _resources;

    private string _sortBy = "Value";
    private bool _ascending = true;
    private string _filter = string.Empty;

    protected override async Task OnParametersSetAsync()
    {
        var decoded = Uri.UnescapeDataString(LabelName);
        _resources = await ResourceRepository.GetByLabelAsync(decoded);
    }

    private IEnumerable<(Resource Resource, string Value)> GetProcessed()
    {
        if (_resources is null)
            return [];

        var query = _resources.AsEnumerable();

        // Filtering
        if (!string.IsNullOrWhiteSpace(_filter))
        {
            query = query.Where(r =>
                r.Resource.Name.Contains(_filter, StringComparison.OrdinalIgnoreCase) ||
                r.Value.Contains(_filter, StringComparison.OrdinalIgnoreCase));
        }

        // Sorting
        query = _sortBy switch
        {
            "Value" => query
                .OrderBy(r => GetSortKey(r.Value))
                .ThenBy(r => r.Resource.Name),
            "Kind" => query.OrderBy(r => r.Resource.Kind),
            _ => query.OrderBy(r => r.Resource.Name)
        };

        if (!_ascending)
            query = query.Reverse();

        return query.ToList();
    }

    private void ToggleSortDirection()
    {
        _ascending = !_ascending;
    }

    private static string DetectType(string value)
    {
        if (DateTime.TryParse(value, out _)) return "DATE";
        if (bool.TryParse(value, out _)) return "BOOL";
        if (decimal.TryParse(value, out _)) return "NUMBER";
        return "TEXT";
    }

    private static string FormatValue(string value)
    {
        if (DateTime.TryParse(value, out var dt))
            return dt.ToString("yyyy-MM-dd");

        return value;
    }

    private string GetResourceUrl(Resource resource)
    {
        if (resource.Kind == SystemResource.KindLabel)
            return $"resources/systems/{Uri.EscapeDataString(resource.Name)}";

        if (resource.Kind == Service.KindLabel)
            return $"resources/services/{Uri.EscapeDataString(resource.Name)}";

        return $"resources/hardware/{Uri.EscapeDataString(resource.Name)}";
    }

    private readonly record struct SortKey(int TypeRank, object Value, string Fallback)
        : IComparable<SortKey>
    {
        public int CompareTo(SortKey other)
        {
            var rank = TypeRank.CompareTo(other.TypeRank);
            if (rank != 0) return rank;

            var valueCompare = TypeRank switch
            {
                0 => ((int)Value).CompareTo((int)other.Value),
                1 => ((DateTime)Value).CompareTo((DateTime)other.Value),
                2 => ((decimal)Value).CompareTo((decimal)other.Value),
                3 => ((bool)Value).CompareTo((bool)other.Value),
                _ => string.Compare((string)Value, (string)other.Value, StringComparison.Ordinal)
            };

            if (valueCompare != 0) return valueCompare;

            // Deterministic tie-breaker
            return string.Compare(Fallback, other.Fallback, StringComparison.Ordinal);
        }
    }

    private static SortKey GetSortKey(string? raw)
    {
        var s = raw?.Trim() ?? string.Empty;

        if (string.IsNullOrEmpty(s))
            return new SortKey(0, 0, "");

        // Date
        if (DateTime.TryParse(s, out var dt))
            return new SortKey(1, dt, s);

        // Number
        if (decimal.TryParse(s, out var dec))
            return new SortKey(2, dec, s);

        // Bool
        if (bool.TryParse(s, out var b))
            return new SortKey(3, b, s);

        // Text (case-insensitive sort by normalizing)
        return new SortKey(4, s.ToLowerInvariant(), s);
    }

}