using ZB.MOM.WW.ScadaBridge.Commons.Messages.Health;

namespace ZB.MOM.WW.ScadaBridge.HealthMonitoring.Tests;

/// <summary>
/// <c>SiteHealthReport.SecretMirrorStatuses</c> carries every site node's
/// deployed-secrets mirror failures (the standby's included) on the active node's report.
/// </summary>
public class SecretMirrorStatusHealthFieldTests
{
    /// <summary>Verifies that a report collected before any status was supplied leaves the field null.</summary>
    [Fact]
    public void CollectReport_NeverTold_LeavesTheFieldNull()
    {
        Assert.Null(new SiteHealthCollector().CollectReport("TestSite").SecretMirrorStatuses);
    }

    /// <summary>Verifies that a collected report carries the latest snapshot without draining it.</summary>
    [Fact]
    public void CollectReport_CarriesTheLatestSnapshot_AndDoesNotDrainIt()
    {
        var collector = new SiteHealthCollector();
        collector.SetSecretMirrorStatuses(
        [
            new SecretMirrorNodeStatus("node-a", DateTimeOffset.UtcNow, []),
            new SecretMirrorNodeStatus(
                "node-b", DateTimeOffset.UtcNow, [new SecretMirrorFailure("S1", "did not decrypt")]),
        ]);

        var first = collector.CollectReport("TestSite").SecretMirrorStatuses!;
        var second = collector.CollectReport("TestSite").SecretMirrorStatuses!;

        Assert.Equal(["node-a", "node-b"], first.Select(s => s.NodeName));
        Assert.Equal(2, second.Count); // point-in-time, not interval-drained
        Assert.Equal("S1", Assert.Single(first[1].Failures).SecretName);
    }

    /// <summary>Verifies that setting the status to null resets the field to no data.</summary>
    [Fact]
    public void SetNull_ResetsToNoData()
    {
        var collector = new SiteHealthCollector();
        collector.SetSecretMirrorStatuses([]);
        collector.SetSecretMirrorStatuses(null);

        Assert.Null(collector.CollectReport("TestSite").SecretMirrorStatuses);
    }
}