using System.Collections.Immutable;
using System.Security.Cryptography;
using System.Text;
using StellaOps.Scanner.Analyzers.Lang.Deno.Internal;
using StellaOps.Scanner.Analyzers.Lang.Deno.Internal.Observations;

namespace StellaOps.Scanner.Analyzers.Lang.Deno.Tests.Observations;

public sealed class ObservationSerializerTests
{
    [Fact]
    public void SerializeProducesDeterministicJson()
    {
        var document = new DenoObservationDocument(
            ImmutableArray.Create("mod.ts"),
            ImmutableArray.Create("https://example.com/deps.ts"),
            ImmutableArray<DenoCapabilityRecord>.Empty,
            ImmutableArray<DenoDynamicImportObservation>.Empty,
            ImmutableArray<DenoLiteralFetchObservation>.Empty,
            ImmutableArray.Create(new DenoObservationBundleSummary("bundle.eszip", "eszip", "mod.ts", 2, 1)));

        var json = DenoObservationSerializer.Serialize(document);
        var hash = DenoObservationSerializer.ComputeSha256(json);

        Assert.Equal("sha256:" + Convert.ToHexString(SHA256.HashData(Encoding.UTF8.GetBytes(json))).ToLowerInvariant(), hash);
        Assert.Contains("\"entrypoints\":[\"mod.ts\"]", json, StringComparison.Ordinal);
    }
}