@* Disk speed per drive: IOPS, MB/s and average latency, optionally against the normal for the same hours. *@
@if (Disks.Count == 0)
{
    <p class="muted">@Empty</p>
}
else
{
    <table>
        <thead>
            <tr>
                <th>Drev</th><th class="num">Filer</th><th class="num">Læs IOPS</th><th class="num">Skriv IOPS</th>
                <th class="num">Læs MB/s</th><th class="num">Skriv MB/s</th><th class="num">Gns. læs</th><th class="num">Gns. skriv</th><th>Vurdering</th>
            </tr>
        </thead>
        <tbody>
            @foreach (var d in Disks)
            {
                var w = d.Window;
                <tr>
                    <td class="mono">@w.Volume</td>
                    <td class="num">@Files(w)</td>
                    <td class="num">@Display.Number(w.ReadIops ?? 0, 1)</td>
                    <td class="num">@Display.Number(w.WriteIops ?? 0, 1)</td>
                    <td class="num">@Display.Number(w.ReadMbPerSecond ?? 0, 1)</td>
                    <td class="num">@Display.Number(w.WriteMbPerSecond ?? 0, 1)</td>
                    <td class="num @(w.AverageReadMs >= 20 || Worse(w.AverageReadMs, d.Normal?.AverageReadMs) ? "bad" : "")">@Ms(w.AverageReadMs)@Normal(d.Normal?.AverageReadMs)</td>
                    <td class="num @(w.AverageWriteMs >= (w.DataFiles == 0 && w.LogFiles > 0 ? 5 : 20) || Worse(w.AverageWriteMs, d.Normal?.AverageWriteMs) ? "bad" : "")">@Ms(w.AverageWriteMs)@Normal(d.Normal?.AverageWriteMs)</td>
                    <td><AssessmentNote Assessment="SQLInsight.Reports.MetricAssessment.AssessDisk(w)" InstanceName="@InstanceName" /></td>
                </tr>
            }
        </tbody>
    </table>
    <details><summary>Hvad betyder det?</summary><p>@SQLInsight.Reports.MetricAssessment.Explanation("disk.read")</p><p>@SQLInsight.Reports.MetricAssessment.Explanation("disk.write.log")</p><p>@SQLInsight.Reports.MetricAssessment.Explanation("disk.write")</p></details>
    <p class="muted">Latens er gennemsnitstiden pr. læsning/skrivning set fra SQL Server (sys.dm_io_virtual_file_stats). Datafiler bør ligge under 10-20 ms, logfiler under 5 ms.@(ShowNormal ? " I parentes: det normale for samme klokkeslæt de foregående uger." : "")</p>
}

@code {
    [Parameter, EditorRequired] public IReadOnlyList<SQLInsight.Reports.DiskComparison> Disks { get; set; } = [];
    [Parameter] public string Empty { get; set; } = "Ingen målinger pr. drev endnu.";
    [Parameter] public bool ShowNormal { get; set; }
    [Parameter] public string? InstanceName { get; set; }

    private static string Ms(double? value) => value is { } v ? $"{Display.Number(v, 1)} ms" : "–";

    private string Normal(double? value) => ShowNormal && value is { } v ? $" ({Display.Number(v, 1)})" : "";

    private static string Files(SQLInsight.Core.Data.DiskActivity d) =>
        d.DataFiles + d.LogFiles == 0 ? "–" : $"{d.DataFiles} data · {d.LogFiles} log";

    private static bool Worse(double? now, double? normal) => now is { } n && normal is > 0 and var m && n >= m * 2 && n - m >= 2;
}