using System;
using System.Collections.Generic;
using System.Globalization;
using FluentAssertions;
using StellaOps.Replay.Core;
using StellaOps.Scanner.Reachability;
using Xunit;

namespace StellaOps.Reachability.FixtureTests;

public sealed class ReachabilityReplayWriterTests
{
    [Fact]
    public void AttachEvidence_AppendsGraphsAndTracesDeterministically()
    {
        var manifest = new ReplayManifest
        {
            Scan = new ReplayScanMetadata { Id = "scan-123", Time = DateTimeOffset.Parse("2025-10-15T10:00:00Z", CultureInfo.InvariantCulture) }
        };

        var graphs = new List<ReachabilityReplayGraph>
        {
            new("static", "cas://graph/B", "ABCDEF", "scanner-jvm", "1.0.0"),
            new("framework", "cas://graph/A", "abcdef", "scanner-jvm", "1.0.0"),
            new("static", "cas://graph/B", "ABCDEF", "scanner-jvm", "1.0.0") // duplicate
        };

        var traces = new List<ReachabilityReplayTrace>
        {
            new("zastava", "cas://trace/1", "FFEE", DateTimeOffset.Parse("2025-10-15T09:00:00+02:00", CultureInfo.InvariantCulture)),
            new("zastava", "cas://trace/2", "ffee", DateTimeOffset.Parse("2025-10-15T09:05:00Z", CultureInfo.InvariantCulture)),
            new("zastava", "cas://trace/1", "FFEE", DateTimeOffset.Parse("2025-10-15T09:00:00Z", CultureInfo.InvariantCulture)) // duplicate once normalized
        };

        var writer = new ReachabilityReplayWriter();
        writer.AttachEvidence(manifest, graphs, traces);

        manifest.Reachability.Should().NotBeNull();
        manifest.Reachability!.Graphs.Should().HaveCount(2);
        manifest.Reachability.Graphs[0].CasUri.Should().Be("cas://graph/A");
        manifest.Reachability.Graphs[0].Sha256.Should().Be("abcdef");
        manifest.Reachability.Graphs[1].CasUri.Should().Be("cas://graph/B");
        manifest.Reachability.Graphs[1].Kind.Should().Be("static");

        manifest.Reachability.RuntimeTraces.Should().HaveCount(2);
        manifest.Reachability.RuntimeTraces[0].RecordedAt.Should().Be(DateTimeOffset.Parse("2025-10-15T07:00:00Z"));
        manifest.Reachability.RuntimeTraces[0].Sha256.Should().Be("ffee");
        manifest.Reachability.RuntimeTraces[1].CasUri.Should().Be("cas://trace/2");
    }

    [Fact]
    public void AttachEvidence_DoesNotCreateSectionWhenEmpty()
    {
        var manifest = new ReplayManifest();
        var writer = new ReachabilityReplayWriter();

        writer.AttachEvidence(manifest, Array.Empty<ReachabilityReplayGraph>(), Array.Empty<ReachabilityReplayTrace>());

        manifest.Reachability.Should().BeNull();
    }
}