using System.IO;
using System.Text.Json.Nodes;
using FluentAssertions;
using StellaOps.Graph.Indexer.Ingestion.Sbom;
using Xunit;

namespace StellaOps.Graph.Indexer.Tests;

public sealed class FileSystemSnapshotFileWriterTests : IDisposable
{
    private readonly string _root = Path.Combine(Path.GetTempPath(), $"graph-snapshots-{Guid.NewGuid():N}");

    [Fact]
    public async Task WriteJsonAsync_writes_canonical_json()
    {
        var writer = new FileSystemSnapshotFileWriter(_root);
        var json = new JsonObject
        {
            ["b"] = "value2",
            ["a"] = "value1"
        };

        await writer.WriteJsonAsync("manifest.json", json, CancellationToken.None);

        var content = await File.ReadAllTextAsync(Path.Combine(_root, "manifest.json"));
        content.Should().Be("{\"a\":\"value1\",\"b\":\"value2\"}");
    }

    [Fact]
    public async Task WriteJsonLinesAsync_writes_each_object_on_new_line()
    {
        var writer = new FileSystemSnapshotFileWriter(_root);
        var items = new[]
        {
            new JsonObject { ["id"] = "1", ["kind"] = "component" },
            new JsonObject { ["id"] = "2", ["kind"] = "artifact" }
        };

        await writer.WriteJsonLinesAsync("nodes.jsonl", items, CancellationToken.None);

        var lines = await File.ReadAllLinesAsync(Path.Combine(_root, "nodes.jsonl"));
        lines.Should().HaveCount(2);
        lines[0].Should().Be("{\"id\":\"1\",\"kind\":\"component\"}");
        lines[1].Should().Be("{\"id\":\"2\",\"kind\":\"artifact\"}");
    }

    public void Dispose()
    {
        if (Directory.Exists(_root))
        {
            Directory.Delete(_root, recursive: true);
        }
    }
}