using FluentAssertions;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Logging;
using StellaOps.BinaryIndex.GroundTruth.SecDb.Configuration;
using StellaOps.BinaryIndex.GroundTruth.SecDb.Tests.Fixtures;
using Xunit;

namespace StellaOps.BinaryIndex.GroundTruth.SecDb.Tests;

/// <summary>
/// Integration tests for SecDb connector.
/// These tests require network access to gitlab.alpinelinux.org.
/// Skip in CI by setting SKIP_INTEGRATION_TESTS=true.
/// </summary>
[Trait("Category", "Integration")]
public class SecDbConnectorIntegrationTests : IAsyncLifetime
{
    private ServiceProvider? _services;
    private readonly bool _skipTests;

    public SecDbConnectorIntegrationTests()
    {
        _skipTests = Environment.GetEnvironmentVariable("SKIP_INTEGRATION_TESTS")?.ToLowerInvariant() == "true"
                  || Environment.GetEnvironmentVariable("CI")?.ToLowerInvariant() == "true";
    }

    public ValueTask InitializeAsync()
    {
        if (_skipTests)
            return ValueTask.CompletedTask;

        var services = new ServiceCollection();
        services.AddLogging(builder => builder.AddConsole().SetMinimumLevel(LogLevel.Debug));
        services.AddSecDbConnector(opts =>
        {
            opts.Branches = ["v3.19"];
            opts.Repositories = ["main"];
            opts.TimeoutSeconds = 120;
            opts.FetchAports = false; // Don't fetch aports for integration tests
        });

        _services = services.BuildServiceProvider();
        return ValueTask.CompletedTask;
    }

    public ValueTask DisposeAsync()
    {
        _services?.Dispose();
        return ValueTask.CompletedTask;
    }

    [Fact]
    [Trait("Category", "NetworkIntegration")]
    public async Task SecDbConnector_CanTestConnectivity()
    {
        Skip.If(_skipTests, "Integration tests skipped");

        // Arrange
        var connector = _services!.GetRequiredService<SecDbConnector>();

        // Act
        try
        {
            var result = await connector.TestConnectivityAsync();

            // Assert - only if network is available
            result.IsConnected.Should().BeTrue("Should be able to connect to Alpine GitLab");
            result.Latency.Should().BeLessThan(TimeSpan.FromSeconds(30));
        }
        catch (HttpRequestException)
        {
            // Network unavailable - skip test
            Skip.If(true, "Network unavailable");
        }
    }

    [Fact]
    public async Task SecDbConnector_CanGetMetadata()
    {
        Skip.If(_skipTests, "Integration tests skipped");

        // Arrange
        var connector = _services!.GetRequiredService<SecDbConnector>();

        // Act
        var metadata = await connector.GetMetadataAsync();

        // Assert
        metadata.SourceId.Should().Be("secdb-alpine");
        metadata.DisplayName.Should().Contain("Alpine");
        metadata.BaseUrl.Should().Contain("gitlab.alpinelinux.org");
    }

    [Fact]
    public void SecDbConnector_HasCorrectProperties()
    {
        Skip.If(_skipTests, "Integration tests skipped");

        // Arrange
        var connector = _services!.GetRequiredService<SecDbConnector>();

        // Assert
        connector.SourceId.Should().Be("secdb-alpine");
        connector.DisplayName.Should().Contain("SecDB");
        connector.SupportedDistros.Should().Contain("alpine");
    }

    [Fact]
    [Trait("Category", "NetworkIntegration")]
    public async Task SecDbConnector_FetchAndGetVulnerabilities_ReturnsData()
    {
        Skip.If(_skipTests, "Integration tests skipped");

        // Arrange
        var connector = _services!.GetRequiredService<SecDbConnector>();

        try
        {
            // First fetch the data
            await connector.FetchAsync(_services!, CancellationToken.None);

            // Act - get vulnerabilities for a well-known package
            var vulnerabilities = await connector.GetVulnerabilitiesForPackageAsync("curl");

            // Assert
            vulnerabilities.Should().NotBeEmpty("curl should have known vulnerabilities");
            vulnerabilities.Should().OnlyContain(v => v.CveId.StartsWith("CVE-"));
        }
        catch (HttpRequestException)
        {
            // Network unavailable - skip test
            Skip.If(true, "Network unavailable");
        }
    }
}

/// <summary>
/// Provides Skip functionality for xUnit when condition is true.
/// </summary>
public static class Skip
{
    public static void If(bool condition, string reason)
    {
        if (condition)
        {
            throw new SkipException(reason);
        }
    }
}

/// <summary>
/// Exception to skip a test.
/// </summary>
public class SkipException : Exception
{
    public SkipException(string reason) : base(reason) { }
}

/// <summary>
/// Test meter factory for diagnostics.
/// </summary>
internal sealed class TestMeterFactory : System.Diagnostics.Metrics.IMeterFactory
{
    public System.Diagnostics.Metrics.Meter Create(System.Diagnostics.Metrics.MeterOptions options)
        => new(options.Name, options.Version);

    public void Dispose() { }
}