using System;
using System.IO;
using GeoVLog.Core.Hdf5;
using GeoVLog.Core.Manifests;
using Xunit;

namespace GeoVLog.Tests.Helpers;

public class StartupScanTests
{
    // Fail fast after 30 s instead of hanging indefinitely
    [Fact(Timeout = 30_000)]
    [Trait("Category", "Core")]
    public void EncryptsLeftoverFilesOnConstruction()
    {
        var dir = CreateTempDir();
        try
        {
            // ─── Arrange ────────────────────────────────────────────────
            var oldPath = Path.Combine(dir, "old.h5");
            File.WriteAllText(oldPath, "data");

            var manifest = new FlightManifest();
            var manifestPath = Path.Combine(dir, "manifest.bin");
            var key = new byte[32];
            var serializer = new FlightManifestProtoSerializer();

            // Use a 100 ms flush interval (irrelevant in no-thread mode,
            // but makes the worker ultra-responsive if startThread = true)
            var flushOpts = new H5LogFlushOptions
            {
                EnableAutoFlush = true,
                FlushInterval = TimeSpan.FromMilliseconds(100)
            };

            // ─── Act ─── Constructor should sweep & encrypt immediately
            // startThread: false ⇒ no background thread is spawned
            var worker = new H5LogQueueWorker(
                dir,
                manifest,
                manifestPath,
                key,
                serializer,
                flushOpts,
                startThread: false);

            // Nothing else to do: encryption happened inside the ctor.
            worker.Dispose();

            // ─── Assert ────────────────────────────────────────────────
            Assert.False(File.Exists(oldPath));          // plaintext gone
            Assert.True(File.Exists(oldPath + ".enc"));  // cipher present
        }
        finally
        {
            Directory.Delete(dir, recursive: true);
        }
    }

    private static string CreateTempDir()
    {
        var path = Path.Combine(Path.GetTempPath(), Guid.NewGuid().ToString("N"));
        Directory.CreateDirectory(path);
        return path;
    }
}