using System.Text;
using XFEEDToolBox.NativeSupport;
using XFEExtension.NetCore.XUnit.Attributes;

namespace XFEEDToolBox.Test;

[TestFixture]
public class NativeSupportPackageTests
{
    private static Dictionary<string, byte[]> Resources(string version = "one")
        => NativeSupportPackage.ResourcePaths.ToDictionary(path => path,
            path => Encoding.UTF8.GetBytes(version + ":" + path));

    [Test]
    public void CompleteBundleExtractsNestedModulesAndReusesMatchingFiles()
    {
        using var temporary = new TemporaryDirectory();
        var resources = Resources();
        var directory = NativeSupportPackage.ExtractPackage(temporary.Path, resources);
        foreach (var pair in resources)
            Check.Equal(Encoding.UTF8.GetString(pair.Value), File.ReadAllText(Path.Combine(directory, pair.Key)));
        var module = Path.Combine(directory, "dinput8.dll");
        File.SetLastWriteTimeUtc(module, new DateTime(2025, 1, 1, 0, 0, 0, DateTimeKind.Utc));
        var before = File.GetLastWriteTimeUtc(module);
        Check.Equal(directory, NativeSupportPackage.ExtractPackage(temporary.Path, resources));
        Check.Equal(before, File.GetLastWriteTimeUtc(module));
    }

    [Test]
    public void ChangedBundleGetsItsOwnDirectoryAndPreservesPreviousBuild()
    {
        using var temporary = new TemporaryDirectory();
        var old = NativeSupportPackage.ExtractPackage(temporary.Path, Resources("old"));
        var current = NativeSupportPackage.ExtractPackage(temporary.Path, Resources("current"));
        Check.That(old != current);
        Check.Equal("old:dinput8.dll", File.ReadAllText(Path.Combine(old, "dinput8.dll")));
        Check.Equal("current:dinput8.dll", File.ReadAllText(Path.Combine(current, "dinput8.dll")));
    }

    [Test]
    public void MissingAndModifiedCachedFilesAreRepairedFromEmbeddedPayloads()
    {
        using var temporary = new TemporaryDirectory();
        var resources = Resources();
        var directory = NativeSupportPackage.ExtractPackage(temporary.Path, resources);
        var module = Path.Combine(directory, "DockingControl", "XFEEDInteraction.dll");
        var manifest = Path.Combine(directory, "interaction.json");
        File.WriteAllText(module, "changed");
        File.Delete(manifest);
        Check.Equal(directory, NativeSupportPackage.ExtractPackage(temporary.Path, resources));
        Check.Equal("one:DockingControl/XFEEDInteraction.dll", File.ReadAllText(module));
        Check.Equal("one:interaction.json", File.ReadAllText(manifest));
        Check.That(!Directory.EnumerateFiles(directory, "*.tmp", SearchOption.AllDirectories).Any());
    }

    [Test]
    public async Task ConcurrentExtractionProducesOnlyCompleteMatchingPayloads()
    {
        using var temporary = new TemporaryDirectory();
        var resources = Resources();
        var paths = await Task.WhenAll(Enumerable.Range(0, 8)
            .Select(_ => Task.Run(() => NativeSupportPackage.ExtractPackage(temporary.Path, resources))));
        Check.Equal(1, paths.Distinct().Count());
        foreach (var pair in resources)
            Check.Equal(Encoding.UTF8.GetString(pair.Value), File.ReadAllText(Path.Combine(paths[0], pair.Key)));
        Check.That(!Directory.EnumerateFiles(paths[0], "*.tmp", SearchOption.AllDirectories).Any());
    }

    [Test]
    public void IncompleteEmptyOrUnexpectedResourcesAreRejectedBeforeExtraction()
    {
        using var temporary = new TemporaryDirectory();
        var resources = Resources();
        resources.Remove("dinput8.dll");
        Check.Throws<InvalidDataException>(() => NativeSupportPackage.ExtractPackage(temporary.Path, resources));
        resources["../dinput8.dll"] = Encoding.UTF8.GetBytes("unexpected");
        Check.Throws<InvalidDataException>(() => NativeSupportPackage.ExtractPackage(temporary.Path, resources));
        resources = Resources();
        resources["dinput8.dll"] = [];
        Check.Throws<InvalidDataException>(() => NativeSupportPackage.ExtractPackage(temporary.Path, resources));
        Check.That(!Directory.EnumerateFileSystemEntries(temporary.Path).Any());
    }
}