@using LazyBear.MCP.Services.Logging

<Rows>
    <Markup Content="@Loc.LogsTitle" Foreground="@UiPalette.Text" Decoration="@Spectre.Console.Decoration.Bold" />
    <Markup Content="@Loc.LogsHint" Foreground="@UiPalette.TextMuted" />
    <Markup Content=" " />

    <Columns>
        @foreach (var filter in Filters)
        {
            var isActive = string.Equals(filter, SelectedFilter, StringComparison.Ordinal);
            <Markup Content="@($" {FilterDisplay(filter)} ")"
                    Foreground="@(isActive ? UiPalette.SelectionForeground : UiPalette.Text)"
                    Background="@(isActive ? UiPalette.AccentSoft : UiPalette.SurfaceMuted)"
                    Decoration="@(isActive ? Spectre.Console.Decoration.Bold : Spectre.Console.Decoration.None)" />
            <Markup Content=" " />
        }
    </Columns>

    <Markup Content=" " />

    @if (Entries.Count == 0)
    {
        <Border BorderColor="@UiPalette.Frame" BoxBorder="@Spectre.Console.BoxBorder.Rounded" Padding="@(new Spectre.Console.Padding(0, 0, 0, 0))">
            <Markup Content="@Loc.LogsEmpty" Foreground="@UiPalette.TextDim" />
        </Border>
    }
    else
    {
        <Select TItem="int"
                Options="@GetOptions()"
                Value="@GetNormalizedIndex()"
                FocusedValue="@GetNormalizedIndex()"
                Formatter="@FormatEntry"
                Expand="true"
                BorderStyle="@Spectre.Console.BoxBorder.Rounded"
                SelectedIndicator="@('>')" />
    }

    <Markup Content=" " />
    <Markup Content="@GetDetailsHeader()" Foreground="@UiPalette.TextMuted" />
    <Markup Content="@GetDetailsText()" Foreground="@UiPalette.Text" />
</Rows>

@code {
    // Внутренние ключи фильтров — не локализуются (используются в логике App.razor)
    private static readonly string[] Filters = ["All", "Info", "Warn", "Error"];

    [Parameter, EditorRequired] public IReadOnlyList<LogEntry> Entries { get; set; } = Array.Empty<LogEntry>();
    [Parameter] public int SelectedIndex { get; set; }
    [Parameter] public EventCallback<int> SelectedIndexChanged { get; set; }
    [Parameter] public string SelectedFilter { get; set; } = "All";
    [Parameter] public int ViewportRows { get; set; } = 5;
    [Parameter] public bool IsStickyToBottom { get; set; }
    [Parameter] public TuiResources Loc { get; set; } = TuiResources.En;

    private int[] GetOptions() => Enumerable.Range(0, Entries.Count).ToArray();

    private int GetNormalizedIndex() => Entries.Count == 0 ? 0 : Math.Clamp(SelectedIndex, 0, Entries.Count - 1);

    // "All" локализуется; уровни логов (Info/Warn/Error) остаются на английском в любой локали
    private string FilterDisplay(string filter) =>
        filter == "All" ? Loc.FilterAll : filter;

    private string GetDetailsHeader()
    {
        if (Entries.Count == 0)
        {
            return $"{Loc.FilterLabel}: {FilterDisplay(SelectedFilter)}";
        }

        var selected = Entries[Math.Clamp(SelectedIndex, 0, Entries.Count - 1)];
        var position = Math.Clamp(SelectedIndex, 0, Entries.Count - 1) + 1;
        var sticky = IsStickyToBottom ? Loc.LogsSticky : Loc.LogsManual;
        return $"{position}/{Entries.Count} | {selected.Timestamp:HH:mm:ss} | {selected.Level} | {selected.ShortCategory} | {sticky}";
    }

    private string GetDetailsText()
    {
        if (Entries.Count == 0)
        {
            return Loc.LogsPlaceholder;
        }

        var selected = Entries[Math.Clamp(SelectedIndex, 0, Entries.Count - 1)];
        var details = string.IsNullOrWhiteSpace(selected.Exception)
            ? selected.Message
            : $"{selected.Message} | {selected.Exception}";

        return Fit(details, Math.Max(Console.WindowWidth - 12, 32));
    }

    private string FormatEntry(int index)
    {
        var entry = Entries[index];
        var level = entry.Level switch
        {
            LogLevel.Error       => "ERR",
            LogLevel.Critical    => "CRT",
            LogLevel.Warning     => "WRN",
            LogLevel.Information => "INF",
            LogLevel.Debug       => "DBG",
            _                    => "TRC"
        };

        var text = $"{entry.Timestamp:HH:mm:ss}  {level,-3}  {entry.ShortCategory,-18}  {entry.Message}";
        return Fit(text, Math.Max(Console.WindowWidth - 12, 32));
    }

    private static string Fit(string text, int width)
    {
        if (width <= 0) return string.Empty;
        if (text.Length <= width) return text.PadRight(width);
        if (width <= 3) return text[..width];
        return text[..(width - 3)] + "...";
    }
}