@page "/"
@inject InsightRepository Repository
@inject Display Display

<PageTitle>SQLInsight Pro</PageTitle>

<h1>Overblik</h1>
<p class="lead">Status for alle overvågede SQL Server-instanser.</p>

@if (_instances.Count == 0)
{
    <div class="empty">
        <p>Der er endnu ingen data. Tilføj en server under <a href="/opsaetning/instanser">Servere og databaser</a>, og tjek, at SQLInsight Agent kører.</p>
    </div>
}
else
{
    <PrivilegeAlert Findings="_active" ShowInstance="true" />

    <div class="kpis">
        <div class="kpi"><span class="kpi-icon"><Icon Name="servers" /></span><div><strong>@_monitored.Count</strong><span>instanser@(_paused > 0 ? $" (+{_paused} på pause)" : string.Empty)</span></div></div>
        <div class="kpi sev-critical"><span class="kpi-icon"><Icon Name="alert" /></span><div><strong>@_monitored.Sum(i => i.Critical)</strong><span>kritiske fund</span></div></div>
        <div class="kpi sev-high"><span class="kpi-icon"><Icon Name="alert" /></span><div><strong>@_monitored.Sum(i => i.High)</strong><span>høje fund</span></div></div>
        <div class="kpi sev-info"><span class="kpi-icon"><Icon Name="unplug" /></span><div><strong>@_monitored.Count(i => i.IsFailing)</strong><span>kan ikke nås</span></div></div>
        <div class="kpi sev-info"><span class="kpi-icon"><Icon Name="gauge" /></span><div><strong>@_monitored.Sum(i => i.NotMeasurable)</strong><span>regler ikke målbare</span></div></div>
        <div class="kpi sev-info"><span class="kpi-icon"><Icon Name="list" /></span><div><strong>@_monitored.Sum(i => i.ManualChecks)</strong><span>skal tjekkes manuelt</span></div></div>
    </div>

    <section class="card">
    <div class="card-head"><h2>Instanser</h2><span class="muted">sorteret efter alvor</span></div>
    <table class="instances">
        <thead>
            <tr><th>Status</th><th>Instans</th><th>Version</th><th>Fund</th><th>Ikke målbar</th><th>Sidst set</th></tr>
        </thead>
        <tbody>
            @foreach (var i in _instances.OrderBy(i => i.Paused).ThenByDescending(i => i.IsFailing).ThenByDescending(i => i.WorstSeverity ?? (Severity)(-1)).ThenBy(i => i.Name))
            {
                <tr class="@(i.Paused ? "paused" : string.Empty)">
                    <td>
                        @if (i.Paused)
                        {
                            <span class="badge sev-info" title="Overvågningen er sat på pause under Servere og databaser. Der kommer ingen nye fund eller alarmer, og tallene tæller ikke med i overblikket.">Sat på pause</span>
                        }
                        else if (i.IsFailing)
                        {
                            <span class="badge sev-critical" title="@i.LastError">Fejler</span>
                        }
                        else
                        {
                            <SeverityBadge Severity="i.WorstSeverity" />
                        }
                    </td>
                    <td><a href="/instanser/@Uri.EscapeDataString(i.Name)"><strong>@i.Name</strong></a><div class="muted">@i.ServerName</div></td>
                    <td>@(i.ProductVersion is null ? "–" : Display.Release(i.ProductVersion, i.EngineEdition))<div class="muted">@i.ProductVersion @i.ProductLevel @i.ProductUpdateLevel</div></td>
                    <td><div class="counts">
                        @if (i.Paused)
                        {
                            <span class="muted">sidste data før pausen</span>
                        }
                        @if (i.Critical > 0) { <SeverityBadge Severity="Severity.Critical" Count="i.Critical" /> }
                        @if (i.High > 0) { <SeverityBadge Severity="Severity.High" Count="i.High" /> }
                        @if (i.Medium > 0) { <SeverityBadge Severity="Severity.Medium" Count="i.Medium" /> }
                        @if (i.Low > 0) { <SeverityBadge Severity="Severity.Low" Count="i.Low" /> }
                    </div></td>
                    <td>@i.NotMeasurable</td>
                    <td title="@Display.Time(i.LastSeenAt)">@Display.Ago(i.LastSeenAt)</td>
                </tr>
            }
        </tbody>
    </table>
    </section>

    <section class="card">
        <div class="card-head"><h2>Kritiske og høje fund</h2><a href="/fund">Se alle fund</a></div>
        <FindingList Findings="_urgent" ShowInstance="true" Empty="Ingen kritiske eller høje fund." />
    </section>
}

@code {
    private IReadOnlyList<InstanceOverview> _instances = [];
    private IReadOnlyList<InstanceOverview> _monitored = [];
    private int _paused;
    private IReadOnlyList<StoredFinding> _active = [];
    private IReadOnlyList<StoredFinding> _urgent = [];

    protected override async Task OnInitializedAsync()
    {
        // Removed instances are left out (their history stays for reports); paused ones are shown, marked, but do not
        // count in the totals, the urgent findings or the privilege alert.
        _instances = (await Repository.GetInstancesAsync()).Where(i => !i.Removed).ToList();
        _monitored = _instances.Where(i => i.IsMonitored).ToList();
        _paused = _instances.Count(i => i.Paused);
        var monitoredIds = _monitored.Select(i => i.InstanceId).ToHashSet();
        _active = (await Repository.GetActiveFindingsAsync()).Where(f => monitoredIds.Contains(f.InstanceId)).ToList();
        _urgent = _active.Where(f => f.Severity >= Severity.High).ToList();
    }
}