using StellaOps.Scanner.Analyzers.Lang.Bun.Internal;

namespace StellaOps.Scanner.Analyzers.Lang.Bun.Tests.Parsers;

public sealed class BunConfigHelperTests : IDisposable
{
    private readonly string _tempDir;

    public BunConfigHelperTests()
    {
        _tempDir = Path.Combine(Path.GetTempPath(), $"bun-config-test-{Guid.NewGuid():N}");
        Directory.CreateDirectory(_tempDir);
    }

    public void Dispose()
    {
        if (Directory.Exists(_tempDir))
        {
            Directory.Delete(_tempDir, recursive: true);
        }
    }

    #region ParseConfig Tests

    [Fact]
    public void ParseConfig_MissingFile_ReturnsEmpty()
    {
        var result = BunConfigHelper.ParseConfig(_tempDir);

        Assert.Null(result.DefaultRegistry);
        Assert.Empty(result.ScopeRegistries);
        Assert.False(result.HasCustomRegistry);
    }

    [Fact]
    public void ParseConfig_DefaultRegistry_ReturnsUrl()
    {
        var bunfig = """
            [install]
            registry = "https://npm.company.com/"
            """;
        File.WriteAllText(Path.Combine(_tempDir, "bunfig.toml"), bunfig);

        var result = BunConfigHelper.ParseConfig(_tempDir);

        Assert.Equal("https://npm.company.com/", result.DefaultRegistry);
        Assert.True(result.HasCustomRegistry);
    }

    [Fact]
    public void ParseConfig_ScopedRegistries_ReturnsMappings()
    {
        var bunfig = """
            [install.scopes]
            "@company" = "https://npm.company.com/"
            "@internal" = "https://internal.registry.com/"
            """;
        File.WriteAllText(Path.Combine(_tempDir, "bunfig.toml"), bunfig);

        var result = BunConfigHelper.ParseConfig(_tempDir);

        Assert.Equal(2, result.ScopeRegistries.Count);
        Assert.Equal("https://npm.company.com/", result.ScopeRegistries["@company"]);
        Assert.Equal("https://internal.registry.com/", result.ScopeRegistries["@internal"]);
        Assert.True(result.HasCustomRegistry);
    }

    [Fact]
    public void ParseConfig_InlineTableFormat_ExtractsUrl()
    {
        var bunfig = """
            [install.scopes]
            "@company" = { url = "https://npm.company.com/" }
            """;
        File.WriteAllText(Path.Combine(_tempDir, "bunfig.toml"), bunfig);

        var result = BunConfigHelper.ParseConfig(_tempDir);

        Assert.Single(result.ScopeRegistries);
        Assert.Equal("https://npm.company.com/", result.ScopeRegistries["@company"]);
    }

    [Fact]
    public void ParseConfig_Comments_IgnoresComments()
    {
        var bunfig = """
            # This is a comment
            [install]
            # registry for npm packages
            registry = "https://npm.company.com/"
            """;
        File.WriteAllText(Path.Combine(_tempDir, "bunfig.toml"), bunfig);

        var result = BunConfigHelper.ParseConfig(_tempDir);

        Assert.Equal("https://npm.company.com/", result.DefaultRegistry);
    }

    [Fact]
    public void ParseConfig_EmptyFile_ReturnsEmpty()
    {
        File.WriteAllText(Path.Combine(_tempDir, "bunfig.toml"), "");

        var result = BunConfigHelper.ParseConfig(_tempDir);

        Assert.Null(result.DefaultRegistry);
        Assert.Empty(result.ScopeRegistries);
    }

    [Fact]
    public void ParseConfig_BothDefaultAndScoped_ReturnsBoth()
    {
        var bunfig = """
            [install]
            registry = "https://default.registry.com/"

            [install.scopes]
            "@company" = "https://npm.company.com/"
            """;
        File.WriteAllText(Path.Combine(_tempDir, "bunfig.toml"), bunfig);

        var result = BunConfigHelper.ParseConfig(_tempDir);

        Assert.Equal("https://default.registry.com/", result.DefaultRegistry);
        Assert.Single(result.ScopeRegistries);
        Assert.Equal("https://npm.company.com/", result.ScopeRegistries["@company"]);
    }

    #endregion

    #region StripQuotes Tests

    [Fact]
    public void StripQuotes_DoubleQuotes_RemovesQuotes()
    {
        var result = BunConfigHelper.StripQuotes("\"hello world\"");

        Assert.Equal("hello world", result);
    }

    [Fact]
    public void StripQuotes_SingleQuotes_RemovesQuotes()
    {
        var result = BunConfigHelper.StripQuotes("'hello world'");

        Assert.Equal("hello world", result);
    }

    [Fact]
    public void StripQuotes_NoQuotes_ReturnsUnchanged()
    {
        var result = BunConfigHelper.StripQuotes("hello world");

        Assert.Equal("hello world", result);
    }

    [Fact]
    public void StripQuotes_MismatchedQuotes_ReturnsUnchanged()
    {
        var result = BunConfigHelper.StripQuotes("\"hello world'");

        Assert.Equal("\"hello world'", result);
    }

    [Fact]
    public void StripQuotes_EmptyString_ReturnsEmpty()
    {
        var result = BunConfigHelper.StripQuotes("");

        Assert.Equal("", result);
    }

    [Fact]
    public void StripQuotes_SingleCharacter_ReturnsUnchanged()
    {
        var result = BunConfigHelper.StripQuotes("a");

        Assert.Equal("a", result);
    }

    #endregion

    #region ExtractRegistryUrl Tests

    [Fact]
    public void ExtractRegistryUrl_DirectUrl_ReturnsUrl()
    {
        var result = BunConfigHelper.ExtractRegistryUrl("https://npm.company.com/");

        Assert.Equal("https://npm.company.com/", result);
    }

    [Fact]
    public void ExtractRegistryUrl_InlineTable_ExtractsUrl()
    {
        var result = BunConfigHelper.ExtractRegistryUrl("{ url = \"https://npm.company.com/\" }");

        Assert.Equal("https://npm.company.com/", result);
    }

    [Fact]
    public void ExtractRegistryUrl_InlineTableSingleQuotes_ExtractsUrl()
    {
        var result = BunConfigHelper.ExtractRegistryUrl("{ url = 'https://npm.company.com/' }");

        Assert.Equal("https://npm.company.com/", result);
    }

    [Fact]
    public void ExtractRegistryUrl_InvalidFormat_ReturnsNull()
    {
        var result = BunConfigHelper.ExtractRegistryUrl("not-a-url");

        Assert.Null(result);
    }

    [Fact]
    public void ExtractRegistryUrl_HttpUrl_ReturnsUrl()
    {
        var result = BunConfigHelper.ExtractRegistryUrl("http://internal.registry.local/");

        Assert.Equal("http://internal.registry.local/", result);
    }

    #endregion
}