using System.IO;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.Extensions.Logging.Abstractions;
using StellaOps.Scheduler.ImpactIndex;
using StellaOps.Scheduler.Models;
using Xunit;

namespace StellaOps.Scheduler.WebService.Tests;

public sealed class ImpactIndexFixtureTests
{
    [Fact]
    public void FixtureDirectoryExists()
    {
        var fixtureDirectory = GetFixtureDirectory();
        Assert.True(Directory.Exists(fixtureDirectory), $"Fixture directory not found: {fixtureDirectory}");

        var files = Directory.EnumerateFiles(fixtureDirectory, "bom-index.json", SearchOption.AllDirectories).ToArray();
        Assert.NotEmpty(files);

        var sampleFile = Path.Combine(fixtureDirectory, "sample", "bom-index.json");
        Assert.Contains(sampleFile, files);
    }

    [Fact]
    public async Task FixtureImpactIndexLoadsSampleImage()
    {
        var fixtureDirectory = GetFixtureDirectory();
        var options = new ImpactIndexStubOptions
        {
            FixtureDirectory = fixtureDirectory,
            SnapshotId = "tests/impact-index-stub"
        };

        var index = new FixtureImpactIndex(options, TimeProvider.System, NullLogger<FixtureImpactIndex>.Instance);
        var selector = new Selector(SelectorScope.AllImages);

        var impactSet = await index.ResolveAllAsync(selector, usageOnly: false);

        Assert.True(impactSet.Total > 0, "Expected the fixture impact index to load at least one image.");
    }

    private static string GetFixtureDirectory()
    {
        var assemblyLocation = typeof(SchedulerWebApplicationFactory).Assembly.Location;
        var assemblyDirectory = Path.GetDirectoryName(assemblyLocation)
            ?? AppContext.BaseDirectory;

        return Path.GetFullPath(Path.Combine(assemblyDirectory, "seed-data", "impact-index"));
    }
}