feat(kpi): K14 — Site Calls trend charts

src/ZB.MOM.WW.ScadaBridge.CentralUI/Components/Pages/SiteCalls/SiteCallsReport.razor

@@ -5,9 +5,12 @@
 @using ZB.MOM.WW.ScadaBridge.Commons.Interfaces.Repositories
 @using ZB.MOM.WW.ScadaBridge.Commons.Messages.Audit
 @using ZB.MOM.WW.ScadaBridge.Communication
+@using ZB.MOM.WW.ScadaBridge.CentralUI.Components.Shared
+@using ZB.MOM.WW.ScadaBridge.CentralUI.Services
 @inject CommunicationService CommunicationService
 @inject ISiteRepository SiteRepository
 @inject IDialogService Dialog
+@inject IKpiHistoryQueryService KpiHistory
 @inject ILogger<SiteCallsReport> Logger
 
 <div class="container-fluid mt-3">
@@ -230,6 +233,59 @@
             </div>
         </div>
     }
+
+    @* ── Trends (K14: collapsible KPI-history charts) ──
+       A best-effort section — each chart's GetSeriesAsync is wrapped so a KPI
+       backend hiccup renders the chart unavailable rather than breaking the
+       grid above. The series load lazily on first expand (and re-load on the
+       24h/7d window toggle), so the page's primary job (the call list) is never
+       blocked on the history query. *@
+    <div class="mt-4" data-test="site-calls-trends">
+        <div class="d-flex justify-content-between align-items-center mb-2">
+            <button type="button" class="btn btn-link text-decoration-none px-0"
+                    @onclick="ToggleTrendsAsync"
+                    aria-expanded="@(_trendsExpanded ? "true" : "false")"
+                    data-test="site-calls-trends-toggle">
+                <span class="me-1">@(_trendsExpanded ? "▾" : "▸")</span>
+                <span class="h5 mb-0">Trends</span>
+            </button>
+            @if (_trendsExpanded)
+            {
+                <div class="btn-group btn-group-sm" role="group" aria-label="Trend window">
+                    <button type="button"
+                            class="btn @(_windowHours == 24 ? "btn-primary" : "btn-outline-secondary")"
+                            @onclick="() => SetWindowAsync(24)" disabled="@_trendsLoading">24h</button>
+                    <button type="button"
+                            class="btn @(_windowHours == 168 ? "btn-primary" : "btn-outline-secondary")"
+                            @onclick="() => SetWindowAsync(168)" disabled="@_trendsLoading">7d</button>
+                </div>
+            }
+        </div>
+
+        @if (_trendsExpanded)
+        {
+            <div class="row g-3">
+                <div class="col-lg-4 col-md-6">
+                    <KpiTrendChart Title="Buffered"
+                                   Points="@_bufferedSeries"
+                                   IsAvailable="@_bufferedAvailable"
+                                   ErrorMessage="@_bufferedError" />
+                </div>
+                <div class="col-lg-4 col-md-6">
+                    <KpiTrendChart Title="Parked"
+                                   Points="@_parkedSeries"
+                                   IsAvailable="@_parkedAvailable"
+                                   ErrorMessage="@_parkedError" />
+                </div>
+                <div class="col-lg-4 col-md-6">
+                    <KpiTrendChart Title="Failed / interval"
+                                   Points="@_failedSeries"
+                                   IsAvailable="@_failedAvailable"
+                                   ErrorMessage="@_failedError" />
+                </div>
+            </div>
+        }
+    </div>
 </div>
 
 @* ── Row detail modal ── *@

src/ZB.MOM.WW.ScadaBridge.CentralUI/Components/Pages/SiteCalls/SiteCallsReport.razor.cs

@@ -3,8 +3,10 @@ using Microsoft.AspNetCore.WebUtilities;
 using Microsoft.Extensions.Logging;
 using ZB.MOM.WW.ScadaBridge.CentralUI.Auth;
 using ZB.MOM.WW.ScadaBridge.CentralUI.Components.Shared;
+using ZB.MOM.WW.ScadaBridge.CentralUI.Services;
 using ZB.MOM.WW.ScadaBridge.Commons.Entities.Sites;
 using ZB.MOM.WW.ScadaBridge.Commons.Messages.Audit;
+using ZB.MOM.WW.ScadaBridge.Commons.Types.Kpi;
 
 namespace ZB.MOM.WW.ScadaBridge.CentralUI.Components.Pages.SiteCalls;
 
@@ -94,6 +96,29 @@ public partial class SiteCallsReport
     private DateTime? _fromFilter;
     private DateTime? _toFilter;
 
+    // ── Trends (K14) ──────────────────────────────────────────────────────────
+    // Collapsible KPI-history charts for the SiteCallAudit / Global series. The
+    // section is collapsed on init and the series load lazily on first expand
+    // (and on each 24h/7d window toggle), so the page's primary job — the call
+    // list — never waits on the history query. Each metric carries its own
+    // series + availability + error so one metric's failure leaves the other two
+    // charts intact; a GetSeriesAsync throw never breaks the grid above.
+    private bool _trendsExpanded;
+    private bool _trendsLoading;
+    private int _windowHours = 24;
+
+    private IReadOnlyList<KpiSeriesPoint>? _bufferedSeries;
+    private bool _bufferedAvailable = true;
+    private string? _bufferedError;
+
+    private IReadOnlyList<KpiSeriesPoint>? _parkedSeries;
+    private bool _parkedAvailable = true;
+    private string? _parkedError;
+
+    private IReadOnlyList<KpiSeriesPoint>? _failedSeries;
+    private bool _failedAvailable = true;
+    private string? _failedError;
+
     private bool HasNextPage => _nextCursor is not null;
 
     /// <inheritdoc />
@@ -521,4 +546,79 @@ public partial class SiteCallsReport
 
         return Task.FromResult(_permittedSiteIds.Contains(resolved.Id));
     }
+
+    // ── Trends (K14) ──────────────────────────────────────────────────────────
+
+    /// <summary>
+    /// Expand/collapse the Trends section. The series load on first expand (and
+    /// stay loaded across collapse/expand cycles); collapsing leaves the loaded
+    /// series in place so re-expanding is instant. A re-fetch only happens on the
+    /// window toggle.
+    /// </summary>
+    private async Task ToggleTrendsAsync()
+    {
+        _trendsExpanded = !_trendsExpanded;
+        if (_trendsExpanded && _bufferedSeries is null && _parkedSeries is null && _failedSeries is null)
+        {
+            await LoadTrendsAsync();
+        }
+    }
+
+    /// <summary>Switch the trend window (24h / 7d) and re-load the series.</summary>
+    private async Task SetWindowAsync(int windowHours)
+    {
+        if (_windowHours == windowHours)
+        {
+            return;
+        }
+
+        _windowHours = windowHours;
+        await LoadTrendsAsync();
+    }
+
+    /// <summary>
+    /// Load all three SiteCallAudit / Global trend series for the current window.
+    /// Best-effort: each <see cref="IKpiHistoryQueryService.GetSeriesAsync"/> is
+    /// wrapped independently so one metric's failure renders only that chart
+    /// unavailable, and a throw never propagates to break the Site Calls grid.
+    /// </summary>
+    private async Task LoadTrendsAsync()
+    {
+        _trendsLoading = true;
+
+        var toUtc = DateTime.UtcNow;
+        var fromUtc = toUtc - TimeSpan.FromHours(_windowHours);
+
+        (_bufferedSeries, _bufferedAvailable, _bufferedError) =
+            await LoadSeriesAsync("buffered", fromUtc, toUtc);
+        (_parkedSeries, _parkedAvailable, _parkedError) =
+            await LoadSeriesAsync("parked", fromUtc, toUtc);
+        (_failedSeries, _failedAvailable, _failedError) =
+            await LoadSeriesAsync("failedLastInterval", fromUtc, toUtc);
+
+        _trendsLoading = false;
+    }
+
+    /// <summary>
+    /// Fetch one SiteCallAudit / Global series, swallowing any failure into the
+    /// chart's unavailable state. Returns the points (null on failure), the
+    /// availability flag, and a short error message for the chart placeholder.
+    /// </summary>
+    private async Task<(IReadOnlyList<KpiSeriesPoint>? Points, bool Available, string? Error)>
+        LoadSeriesAsync(string metric, DateTime fromUtc, DateTime toUtc)
+    {
+        try
+        {
+            var points = await KpiHistory.GetSeriesAsync(
+                KpiSources.SiteCallAudit, metric, KpiScopes.Global, scopeKey: null, fromUtc, toUtc);
+            return (points, true, null);
+        }
+        catch (Exception ex)
+        {
+            // A KPI-history hiccup must never break the Site Calls page — the
+            // chart degrades to its unavailable placeholder instead.
+            Logger.LogWarning(ex, "Failed to load Site Calls trend series for metric {Metric}.", metric);
+            return (null, false, "Trend data unavailable.");
+        }
+    }
 }

tests/ZB.MOM.WW.ScadaBridge.CentralUI.Tests/Pages/SiteCallsReportPageTests.cs

@@ -10,9 +10,11 @@ using Microsoft.Extensions.Logging.Abstractions;
 using Microsoft.Extensions.Options;
 using NSubstitute;
 using ZB.MOM.WW.ScadaBridge.CentralUI.Components.Shared;
+using ZB.MOM.WW.ScadaBridge.CentralUI.Services;
 using ZB.MOM.WW.ScadaBridge.Commons.Entities.Sites;
 using ZB.MOM.WW.ScadaBridge.Commons.Interfaces.Repositories;
 using ZB.MOM.WW.ScadaBridge.Commons.Messages.Audit;
+using ZB.MOM.WW.ScadaBridge.Commons.Types.Kpi;
 using ZB.MOM.WW.ScadaBridge.Communication;
 using ZB.MOM.WW.ScadaBridge.Security;
 using SiteCallsReportPage = ZB.MOM.WW.ScadaBridge.CentralUI.Components.Pages.SiteCalls.SiteCallsReport;
@@ -34,6 +36,11 @@ public class SiteCallsReportPageTests : BunitContext
     private readonly ActorSystem _system = ActorSystem.Create("site-calls-report-tests");
     private readonly CommunicationService _comms;
 
+    // K14: KPI-history facade for the Trends section. Defaults to a known
+    // non-empty (≥2-point) series so an expanded chart draws a polyline;
+    // individual tests reconfigure it (e.g. to throw) before rendering.
+    private readonly IKpiHistoryQueryService _kpiHistory = Substitute.For<IKpiHistoryQueryService>();
+
     private static readonly Guid ParkedId = Guid.Parse("11111111-1111-1111-1111-111111111111");
     private static readonly Guid FailedId = Guid.Parse("22222222-2222-2222-2222-222222222222");
 
@@ -77,6 +84,20 @@ public class SiteCallsReportPageTests : BunitContext
         Services.AddSingleton(_comms);
         Services.AddSingleton<IDialogService>(new AlwaysConfirmDialogService());
 
+        // K14: by default every trend series resolves to a known ≥2-point series so
+        // an expanded chart draws a polyline. Tests that need a failure reconfigure
+        // this substitute before rendering.
+        _kpiHistory.GetSeriesAsync(
+                Arg.Any<string>(), Arg.Any<string>(), Arg.Any<string>(), Arg.Any<string?>(),
+                Arg.Any<DateTime>(), Arg.Any<DateTime>(), Arg.Any<int?>(), Arg.Any<CancellationToken>())
+            .Returns(Task.FromResult<IReadOnlyList<KpiSeriesPoint>>(new List<KpiSeriesPoint>
+            {
+                new(DateTime.UtcNow.AddHours(-2), 3),
+                new(DateTime.UtcNow.AddHours(-1), 7),
+                new(DateTime.UtcNow, 5),
+            }));
+        Services.AddSingleton(_kpiHistory);
+
         var siteRepo = Substitute.For<ISiteRepository>();
         siteRepo.GetAllSitesAsync(Arg.Any<CancellationToken>())
             .Returns(Task.FromResult<IReadOnlyList<Site>>(new List<Site>
@@ -510,6 +531,91 @@ public class SiteCallsReportPageTests : BunitContext
         Assert.DoesNotContain(FailedId.ToString("N")[..12], cut.Markup);
     }
 
+    // ─────────────────────────────────────────────────────────────────────────
+    // Trends (K14) — a collapsible section with one KpiTrendChart per metric
+    // (buffered / parked / failedLastInterval) for SiteCallAudit / Global. The
+    // section is collapsed on init; expanding it lazy-loads the series.
+    // ─────────────────────────────────────────────────────────────────────────
+
+    [Fact]
+    public void TrendsSection_Container_AlwaysRenders()
+    {
+        var cut = Render<SiteCallsReportPage>();
+
+        // The collapsible container (with its toggle) is present even while
+        // collapsed — only the charts are gated behind the expand.
+        cut.WaitForAssertion(() =>
+            Assert.NotNull(cut.Find("[data-test='site-calls-trends']")));
+    }
+
+    [Fact]
+    public void TrendsSection_WhenExpanded_RendersChartsFromKnownSeries()
+    {
+        var cut = Render<SiteCallsReportPage>();
+        cut.WaitForState(() => cut.Markup.Contains("ERP.GetOrder"));
+
+        // Collapsed on init — no chart yet.
+        Assert.Empty(cut.FindAll("[data-test^='kpi-trend-']"));
+
+        // Expand the Trends section; the lazy series load fills the charts.
+        cut.Find("[data-test='site-calls-trends-toggle']").Click();
+
+        cut.WaitForAssertion(() =>
+        {
+            // At least one trend chart rendered, and (because the series has ≥2
+            // points) it draws a polyline rather than the unavailable placeholder.
+            var charts = cut.FindAll("[data-test^='kpi-trend-']");
+            Assert.NotEmpty(charts);
+            Assert.Contains("<polyline", cut.Markup);
+        });
+    }
+
+    [Fact]
+    public void TrendsSection_WindowToggle_ReloadsSeries()
+    {
+        var cut = Render<SiteCallsReportPage>();
+        cut.WaitForState(() => cut.Markup.Contains("ERP.GetOrder"));
+
+        cut.Find("[data-test='site-calls-trends-toggle']").Click();
+        cut.WaitForAssertion(() => Assert.NotEmpty(cut.FindAll("[data-test^='kpi-trend-']")));
+
+        // First expand issued 3 GetSeriesAsync calls (one per metric).
+        _kpiHistory.ReceivedCalls();
+        var afterExpand = _kpiHistory.ReceivedCalls().Count();
+
+        // Switch the window to 7d — the series re-load (another 3 calls).
+        cut.FindAll("button").First(b => b.TextContent.Trim() == "7d").Click();
+
+        cut.WaitForAssertion(() =>
+            Assert.True(_kpiHistory.ReceivedCalls().Count() > afterExpand));
+    }
+
+    [Fact]
+    public void TrendsSection_WhenKpiHistoryThrows_PageStillRenders()
+    {
+        // Best-effort contract: a GetSeriesAsync throw must never break the page.
+        _kpiHistory.GetSeriesAsync(
+                Arg.Any<string>(), Arg.Any<string>(), Arg.Any<string>(), Arg.Any<string?>(),
+                Arg.Any<DateTime>(), Arg.Any<DateTime>(), Arg.Any<int?>(), Arg.Any<CancellationToken>())
+            .Returns<Task<IReadOnlyList<KpiSeriesPoint>>>(_ =>
+                throw new InvalidOperationException("KPI backend down"));
+
+        var cut = Render<SiteCallsReportPage>();
+        cut.WaitForState(() => cut.Markup.Contains("ERP.GetOrder"));
+
+        // Expanding triggers the failing loads — the grid and trends container
+        // both survive; the charts fall back to the unavailable placeholder.
+        cut.Find("[data-test='site-calls-trends-toggle']").Click();
+
+        cut.WaitForAssertion(() =>
+        {
+            Assert.Contains("ERP.GetOrder", cut.Markup);
+            Assert.NotNull(cut.Find("[data-test='site-calls-trends']"));
+            // No polyline — the charts degraded to the unavailable em-dash state.
+            Assert.DoesNotContain("<polyline", cut.Markup);
+        });
+    }
+
     protected override void Dispose(bool disposing)
     {
         if (disposing)