@page "/clusters/{ClusterId}/redundancy"
@attribute [Microsoft.AspNetCore.Authorization.Authorize]
@rendermode RenderMode.InteractiveServer
@using Microsoft.EntityFrameworkCore
@using ZB.MOM.WW.OtOpcUa.Configuration
@using ZB.MOM.WW.OtOpcUa.Configuration.Entities
@inject IDbContextFactory<OtOpcUaConfigDbContext> DbFactory

@if (!_loaded)
{
    <p>Loading…</p>
}
else if (_cluster is null)
{
    <section class="panel notice rise" style="animation-delay:.02s">
        Cluster <span class="mono">@ClusterId</span> was not found.
        <a class="ms-2" href="/clusters">Back to list</a>.
    </section>
}
else
{
    <div class="d-flex justify-content-between align-items-center mb-3">
        <div>
            <h4 class="mb-0">@_cluster.Name &middot; Redundancy</h4>
            <span class="mono text-muted">@_cluster.ClusterId</span>
        </div>
    </div>

    <ClusterNav ClusterId="@ClusterId" ActiveTab="redundancy" />

    <section class="panel notice rise" style="animation-delay:.02s">
        v2 redundancy is computed at runtime by <span class="mono">RedundancyStateActor</span>
        on each admin node. The values below are the static configuration; the resolved live
        <span class="mono">ServiceLevel</span> for each peer is broadcast on the
        <span class="mono">redundancy-state</span> DPS topic and consumed by the OPC UA host's
        <span class="mono">ServerStatus</span> publisher. See
        <a href="/docs/v2/Architecture-v2.md">docs/v2/Architecture-v2.md</a>.
    </section>

    <section class="card-grid rise mt-3" style="animation-delay:.08s">
        <div class="metric-card">
            <div class="panel-head">Cluster redundancy</div>
            <div class="kv"><span class="k">Mode</span><span class="v">@_cluster.RedundancyMode</span></div>
            <div class="kv"><span class="k">Node count</span><span class="v">@_cluster.NodeCount</span></div>
        </div>
    </section>

    <section class="panel rise mt-3" style="animation-delay:.14s">
        <div class="panel-head">Node service-level configuration</div>
        @if (_nodes is null || _nodes.Count == 0)
        {
            <div style="padding:1rem" class="text-muted">No nodes registered.</div>
        }
        else
        {
            <div class="table-wrap">
                <table class="data-table">
                    <thead>
                        <tr>
                            <th>Node ID</th>
                            <th>ApplicationUri</th>
                            <th class="num">ServiceLevel base</th>
                            <th>Notes</th>
                        </tr>
                    </thead>
                    <tbody>
                        @foreach (var n in _nodes)
                        {
                            <tr>
                                <td><span class="mono">@n.NodeId</span></td>
                                <td><span class="mono small">@n.ApplicationUri</span></td>
                                <td class="num">@n.ServiceLevelBase</td>
                                <td class="text-muted small">
                                    @if (n.ServiceLevelBase >= 200) { <text>Primary preference</text> }
                                    else if (n.ServiceLevelBase >= 100) { <text>Secondary preference</text> }
                                    else { <text>Custom</text> }
                                </td>
                            </tr>
                        }
                    </tbody>
                </table>
            </div>
        }
    </section>
}

@code {
    [Parameter] public string ClusterId { get; set; } = "";

    private bool _loaded;
    private ServerCluster? _cluster;
    private List<ClusterNode>? _nodes;

    protected override async Task OnInitializedAsync()
    {
        await using var db = await DbFactory.CreateDbContextAsync();
        _cluster = await db.ServerClusters.AsNoTracking()
            .FirstOrDefaultAsync(c => c.ClusterId == ClusterId);
        if (_cluster is not null)
        {
            _nodes = await db.ClusterNodes.AsNoTracking()
                .Where(n => n.ClusterId == ClusterId)
                .OrderBy(n => n.NodeId)
                .ToListAsync();
        }
        _loaded = true;
    }
}
