using StellaOps.Scanner.Analyzers.Lang.Node.Internal;

namespace StellaOps.Scanner.Analyzers.Lang.Node;

public sealed class NodeLanguageAnalyzer : ILanguageAnalyzer
{
    public string Id => "node";

    public string DisplayName => "Node.js Analyzer";

    public async ValueTask AnalyzeAsync(LanguageAnalyzerContext context, LanguageComponentWriter writer, CancellationToken cancellationToken)
    {
        ArgumentNullException.ThrowIfNull(context);
        ArgumentNullException.ThrowIfNull(writer);

        var lockData = await NodeLockData.LoadAsync(context.RootPath, cancellationToken).ConfigureAwait(false);
        var packages = NodePackageCollector.CollectPackages(context, lockData, cancellationToken);

        foreach (var package in packages.OrderBy(static p => p.ComponentKey, StringComparer.Ordinal))
        {
            cancellationToken.ThrowIfCancellationRequested();

            var metadata = package.CreateMetadata();
            var evidence = package.CreateEvidence();

            writer.AddFromPurl(
                analyzerId: Id,
                purl: package.Purl,
                name: package.Name,
                version: package.Version,
                type: "npm",
                metadata: metadata,
                evidence: evidence,
                usedByEntrypoint: package.IsUsedByEntrypoint);
        }
    }
}