using System.Collections.Generic;
using System.Collections.Immutable;
using StellaOps.Scanner.Analyzers.OS.Mapping;
using StellaOps.Scanner.Core.Contracts;
using Xunit;

namespace StellaOps.Scanner.Analyzers.OS.Tests.Mapping;

public class OsComponentMapperTests
{
    [Fact]
    public void ToLayerFragments_ProducesDeterministicComponents()
    {
        var package = new OSPackageRecord(
            analyzerId: "apk",
            packageUrl: "pkg:alpine/busybox@1.37.0-r0?arch=x86_64",
            name: "busybox",
            version: "1.37.0",
            architecture: "x86_64",
            evidenceSource: PackageEvidenceSource.ApkDatabase,
            release: "r0",
            sourcePackage: "busybox",
            license: "GPL-2.0-only",
            depends: new[] { "musl>=1.2.5-r0", "ssl_client" },
            files: new[]
            {
                new OSPackageFileEvidence("/bin/busybox", sha256: "abc123", isConfigFile: false),
                new OSPackageFileEvidence("/etc/profile", isConfigFile: true, digests: new Dictionary<string, string> { ["md5"] = "deadbeef" }),
            },
            vendorMetadata: new Dictionary<string, string?>
            {
                ["homepage"] = "https://busybox.net/",
            });

        var result = new OSPackageAnalyzerResult(
            analyzerId: "apk",
            packages: ImmutableArray.Create(package),
            telemetry: new OSAnalyzerTelemetry(System.TimeSpan.Zero, 1, 2));

        var fragments = OsComponentMapper.ToLayerFragments(new[] { result });

        Assert.Single(fragments);
        var fragment = fragments[0];
        Assert.StartsWith("sha256:", fragment.LayerDigest);
        Assert.Single(fragment.Components);

        var component = fragment.Components[0];
        Assert.Equal(fragment.LayerDigest, component.LayerDigest);
        Assert.Equal("pkg:alpine/busybox@1.37.0-r0?arch=x86_64", component.Identity.Key);
        Assert.Equal("busybox", component.Identity.Name);
        Assert.Equal("1.37.0", component.Identity.Version);
        Assert.Equal("pkg:alpine/busybox@1.37.0-r0?arch=x86_64", component.Identity.Purl);
        Assert.Equal("os-package", component.Identity.ComponentType);
        Assert.Equal("busybox", component.Identity.Group);
        Assert.Collection(component.Evidence,
            evidence =>
            {
                Assert.Equal("file", evidence.Kind);
                Assert.Equal("/bin/busybox", evidence.Value);
                Assert.Equal("abc123", evidence.Source);
            },
            evidence =>
            {
                Assert.Equal("config-file", evidence.Kind);
                Assert.Equal("/etc/profile", evidence.Value);
                Assert.Null(evidence.Source);
            });
        Assert.Equal(new[] { "musl>=1.2.5-r0", "ssl_client" }, component.Dependencies);
        Assert.False(component.Usage.UsedByEntrypoint);
        Assert.NotNull(component.Metadata);
        Assert.Equal(new[] { "GPL-2.0-only" }, component.Metadata!.Licenses);
        Assert.Contains("stellaops.os.analyzer", component.Metadata.Properties!.Keys);
        Assert.Equal("apk", component.Metadata.Properties!["stellaops.os.analyzer"]);
        Assert.Equal("https://busybox.net/", component.Metadata.Properties!["vendor.homepage"]);
    }
}