using Microsoft.Extensions.Logging;
using Microsoft.Extensions.Logging.Abstractions;
using StellaOps.Scanner.Analyzers.OS.MacOsBundle;
using Xunit;

using StellaOps.TestKit;
namespace StellaOps.Scanner.Analyzers.OS.MacOsBundle.Tests;

public sealed class MacOsBundleAnalyzerTests
{
    private static readonly string FixturesRoot = Path.Combine(
        AppContext.BaseDirectory,
        "Fixtures");

    private readonly MacOsBundleAnalyzer _analyzer;
    private readonly ILogger _logger;

    public MacOsBundleAnalyzerTests()
    {
        _logger = NullLoggerFactory.Instance.CreateLogger<MacOsBundleAnalyzer>();
        _analyzer = new MacOsBundleAnalyzer((ILogger<MacOsBundleAnalyzer>)_logger);
    }

    private OSPackageAnalyzerContext CreateContext(string rootPath)
    {
        return new OSPackageAnalyzerContext(
            rootPath,
            workspacePath: null,
            TimeProvider.System,
            _logger);
    }

    [Trait("Category", TestCategories.Unit)]
        [Fact]
    public void AnalyzerId_ReturnsMacosBundleIdentifier()
    {
        Assert.Equal("macos-bundle", _analyzer.AnalyzerId);
    }

    [Trait("Category", TestCategories.Unit)]
        [Fact]
    public async Task AnalyzeAsync_WithValidBundles_ReturnsPackages()
    {
        // Arrange
        var context = CreateContext(FixturesRoot);

        // Act
        var result = await _analyzer.AnalyzeAsync(context, TestContext.Current.CancellationToken);

        // Assert
        Assert.NotNull(result);
        Assert.Equal("macos-bundle", result.AnalyzerId);
        Assert.True(result.Packages.Count > 0, "Expected at least one bundle");
    }

    [Trait("Category", TestCategories.Unit)]
        [Fact]
    public async Task AnalyzeAsync_FindsTestApp()
    {
        // Arrange
        var context = CreateContext(FixturesRoot);

        // Act
        var result = await _analyzer.AnalyzeAsync(context, TestContext.Current.CancellationToken);

        // Assert
        var testApp = result.Packages.FirstOrDefault(p =>
            p.VendorMetadata.TryGetValue("macos:bundle_id", out var id) &&
            id == "com.stellaops.testapp");
        Assert.NotNull(testApp);
        Assert.Equal("1.2.3", testApp.Version);
        Assert.Equal("Test Application", testApp.Name);
    }

    [Trait("Category", TestCategories.Unit)]
        [Fact]
    public async Task AnalyzeAsync_ExtractsVersionCorrectly()
    {
        // Arrange
        var context = CreateContext(FixturesRoot);

        // Act
        var result = await _analyzer.AnalyzeAsync(context, TestContext.Current.CancellationToken);

        // Assert
        var testApp = result.Packages.FirstOrDefault(p =>
            p.VendorMetadata.TryGetValue("macos:bundle_id", out var id) &&
            id == "com.stellaops.testapp");
        Assert.NotNull(testApp);
        // ShortVersion takes precedence
        Assert.Equal("1.2.3", testApp.Version);
        // Build number goes to release
        Assert.Equal("123", testApp.Release);
    }

    [Trait("Category", TestCategories.Unit)]
        [Fact]
    public async Task AnalyzeAsync_BuildsCorrectPurl()
    {
        // Arrange
        var context = CreateContext(FixturesRoot);

        // Act
        var result = await _analyzer.AnalyzeAsync(context, TestContext.Current.CancellationToken);

        // Assert
        var testApp = result.Packages.FirstOrDefault(p =>
            p.VendorMetadata.TryGetValue("macos:bundle_id", out var id) &&
            id == "com.stellaops.testapp");
        Assert.NotNull(testApp);
        Assert.Contains("pkg:generic/macos-app/com.stellaops.testapp@1.2.3", testApp.PackageUrl);
    }

    [Trait("Category", TestCategories.Unit)]
        [Fact]
    public async Task AnalyzeAsync_ExtractsVendorFromBundleId()
    {
        // Arrange
        var context = CreateContext(FixturesRoot);

        // Act
        var result = await _analyzer.AnalyzeAsync(context, TestContext.Current.CancellationToken);

        // Assert
        var testApp = result.Packages.FirstOrDefault(p =>
            p.VendorMetadata.TryGetValue("macos:bundle_id", out var id) &&
            id == "com.stellaops.testapp");
        Assert.NotNull(testApp);
        Assert.Equal("stellaops", testApp.SourcePackage);
    }

    [Trait("Category", TestCategories.Unit)]
        [Fact]
    public async Task AnalyzeAsync_SetsEvidenceSourceToMacOsBundle()
    {
        // Arrange
        var context = CreateContext(FixturesRoot);

        // Act
        var result = await _analyzer.AnalyzeAsync(context, TestContext.Current.CancellationToken);

        // Assert
        foreach (var package in result.Packages)
        {
            Assert.Equal(PackageEvidenceSource.MacOsBundle, package.EvidenceSource);
        }
    }

    [Trait("Category", TestCategories.Unit)]
        [Fact]
    public async Task AnalyzeAsync_ExtractsVendorMetadata()
    {
        // Arrange
        var context = CreateContext(FixturesRoot);

        // Act
        var result = await _analyzer.AnalyzeAsync(context, TestContext.Current.CancellationToken);

        // Assert
        var testApp = result.Packages.FirstOrDefault(p =>
            p.VendorMetadata.TryGetValue("macos:bundle_id", out var id) &&
            id == "com.stellaops.testapp");
        Assert.NotNull(testApp);
        Assert.Equal("com.stellaops.testapp", testApp.VendorMetadata["macos:bundle_id"]);
        Assert.Equal("APPL", testApp.VendorMetadata["macos:bundle_type"]);
        Assert.Equal("12.0", testApp.VendorMetadata["macos:min_os_version"]);
        Assert.Equal("TestApp", testApp.VendorMetadata["macos:executable"]);
        Assert.Equal("MacOSX", testApp.VendorMetadata["macos:platforms"]);
    }

    [Trait("Category", TestCategories.Unit)]
        [Fact]
    public async Task AnalyzeAsync_IncludesCodeResourcesHash()
    {
        // Arrange
        var context = CreateContext(FixturesRoot);

        // Act
        var result = await _analyzer.AnalyzeAsync(context, TestContext.Current.CancellationToken);

        // Assert
        var testApp = result.Packages.FirstOrDefault(p =>
            p.VendorMetadata.TryGetValue("macos:bundle_id", out var id) &&
            id == "com.stellaops.testapp");
        Assert.NotNull(testApp);
        Assert.True(testApp.VendorMetadata.ContainsKey("macos:code_resources_hash"));
        var hash = testApp.VendorMetadata["macos:code_resources_hash"];
        Assert.StartsWith("sha256:", hash);
    }

    [Trait("Category", TestCategories.Unit)]
        [Fact]
    public async Task AnalyzeAsync_DetectsSandboxedApp()
    {
        // Arrange
        var context = CreateContext(FixturesRoot);

        // Act
        var result = await _analyzer.AnalyzeAsync(context, TestContext.Current.CancellationToken);

        // Assert
        var sandboxedApp = result.Packages.FirstOrDefault(p =>
            p.VendorMetadata.TryGetValue("macos:bundle_id", out var id) &&
            id == "com.stellaops.sandboxed");
        Assert.NotNull(sandboxedApp);
        Assert.Equal("true", sandboxedApp.VendorMetadata["macos:sandboxed"]);
    }

    [Trait("Category", TestCategories.Unit)]
        [Fact]
    public async Task AnalyzeAsync_DetectsHighRiskEntitlements()
    {
        // Arrange
        var context = CreateContext(FixturesRoot);

        // Act
        var result = await _analyzer.AnalyzeAsync(context, TestContext.Current.CancellationToken);

        // Assert
        var sandboxedApp = result.Packages.FirstOrDefault(p =>
            p.VendorMetadata.TryGetValue("macos:bundle_id", out var id) &&
            id == "com.stellaops.sandboxed");
        Assert.NotNull(sandboxedApp);
        Assert.True(sandboxedApp.VendorMetadata.ContainsKey("macos:high_risk_entitlements"));
        var highRisk = sandboxedApp.VendorMetadata["macos:high_risk_entitlements"];
        // Full entitlement keys are stored
        Assert.Contains("com.apple.security.device.camera", highRisk);
        Assert.Contains("com.apple.security.device.microphone", highRisk);
    }

    [Trait("Category", TestCategories.Unit)]
        [Fact]
    public async Task AnalyzeAsync_DetectsCapabilityCategories()
    {
        // Arrange
        var context = CreateContext(FixturesRoot);

        // Act
        var result = await _analyzer.AnalyzeAsync(context, TestContext.Current.CancellationToken);

        // Assert
        var sandboxedApp = result.Packages.FirstOrDefault(p =>
            p.VendorMetadata.TryGetValue("macos:bundle_id", out var id) &&
            id == "com.stellaops.sandboxed");
        Assert.NotNull(sandboxedApp);
        Assert.True(sandboxedApp.VendorMetadata.ContainsKey("macos:capability_categories"));
        var categories = sandboxedApp.VendorMetadata["macos:capability_categories"];
        Assert.Contains("network", categories);
        Assert.Contains("camera", categories);
        Assert.Contains("microphone", categories);
        Assert.Contains("filesystem", categories);
        Assert.Contains("sandbox", categories);
    }

    [Trait("Category", TestCategories.Unit)]
        [Fact]
    public async Task AnalyzeAsync_IncludesFileEvidence()
    {
        // Arrange
        var context = CreateContext(FixturesRoot);

        // Act
        var result = await _analyzer.AnalyzeAsync(context, TestContext.Current.CancellationToken);

        // Assert
        var testApp = result.Packages.FirstOrDefault(p =>
            p.VendorMetadata.TryGetValue("macos:bundle_id", out var id) &&
            id == "com.stellaops.testapp");
        Assert.NotNull(testApp);
        Assert.True(testApp.Files.Count > 0);

        var executable = testApp.Files.FirstOrDefault(f => f.Path.Contains("MacOS/TestApp"));
        Assert.NotNull(executable);
        Assert.False(executable.IsConfigFile);

        var infoPlist = testApp.Files.FirstOrDefault(f => f.Path.Contains("Info.plist"));
        Assert.NotNull(infoPlist);
        Assert.True(infoPlist.IsConfigFile);
    }

    [Trait("Category", TestCategories.Unit)]
        [Fact]
    public async Task AnalyzeAsync_ResultsAreDeterministicallySorted()
    {
        // Arrange
        var context = CreateContext(FixturesRoot);

        // Act
        var result1 = await _analyzer.AnalyzeAsync(context, TestContext.Current.CancellationToken);
        var result2 = await _analyzer.AnalyzeAsync(context, TestContext.Current.CancellationToken);

        // Assert
        Assert.Equal(result1.Packages.Count, result2.Packages.Count);
        for (int i = 0; i < result1.Packages.Count; i++)
        {
            Assert.Equal(result1.Packages[i].PackageUrl, result2.Packages[i].PackageUrl);
        }
    }

    [Trait("Category", TestCategories.Unit)]
        [Fact]
    public async Task AnalyzeAsync_NoApplicationsDirectory_ReturnsEmptyPackages()
    {
        // Arrange - use temp directory without Applications
        var tempPath = Path.Combine(Path.GetTempPath(), Guid.NewGuid().ToString());
        Directory.CreateDirectory(tempPath);

        try
        {
            var context = CreateContext(tempPath);

            // Act
            var result = await _analyzer.AnalyzeAsync(context, TestContext.Current.CancellationToken);

            // Assert
            Assert.Empty(result.Packages);
        }
        finally
        {
            Directory.Delete(tempPath, recursive: true);
        }
    }

    [Trait("Category", TestCategories.Unit)]
        [Fact]
    public async Task AnalyzeAsync_PopulatesTelemetry()
    {
        // Arrange
        var context = CreateContext(FixturesRoot);

        // Act
        var result = await _analyzer.AnalyzeAsync(context, TestContext.Current.CancellationToken);

        // Assert
        Assert.NotNull(result.Telemetry);
        Assert.True(result.Telemetry.PackageCount > 0);
        Assert.True(result.Telemetry.Duration > TimeSpan.Zero);
    }
}