using ScadaLink.TemplateEngine.Validation;

namespace ScadaLink.TemplateEngine.Tests.Validation;

public class ScriptCompilerTests
{
    private readonly ScriptCompiler _sut = new();

    [Fact]
    public void TryCompile_ValidCode_ReturnsSuccess()
    {
        var result = _sut.TryCompile("var x = 1; if (x > 0) { x++; }", "Test");
        Assert.True(result.IsSuccess);
    }

    [Fact]
    public void TryCompile_EmptyCode_ReturnsFailure()
    {
        var result = _sut.TryCompile("", "Test");
        Assert.True(result.IsFailure);
        Assert.Contains("empty", result.Error, StringComparison.OrdinalIgnoreCase);
    }

    [Fact]
    public void TryCompile_MismatchedBraces_ReturnsFailure()
    {
        var result = _sut.TryCompile("if (true) { x = 1;", "Test");
        Assert.True(result.IsFailure);
        Assert.Contains("braces", result.Error, StringComparison.OrdinalIgnoreCase);
    }

    [Fact]
    public void TryCompile_UnclosedBlockComment_ReturnsFailure()
    {
        var result = _sut.TryCompile("/* this is never closed", "Test");
        Assert.True(result.IsFailure);
        Assert.Contains("comment", result.Error, StringComparison.OrdinalIgnoreCase);
    }

    [Theory]
    [InlineData("System.IO.File.ReadAllText(\"x\");")]
    [InlineData("System.Diagnostics.Process.Start(\"cmd\");")]
    [InlineData("System.Threading.Thread.Sleep(1000);")]
    [InlineData("System.Reflection.Assembly.Load(\"x\");")]
    [InlineData("System.Net.Sockets.TcpClient c;")]
    [InlineData("System.Net.Http.HttpClient c;")]
    public void TryCompile_ForbiddenApi_ReturnsFailure(string code)
    {
        var result = _sut.TryCompile(code, "Test");
        Assert.True(result.IsFailure);
        Assert.Contains("forbidden", result.Error, StringComparison.OrdinalIgnoreCase);
    }

    [Fact]
    public void TryCompile_BracesInStrings_Ignored()
    {
        var result = _sut.TryCompile("var s = \"{ not a brace }\";", "Test");
        Assert.True(result.IsSuccess);
    }

    [Fact]
    public void TryCompile_BracesInComments_Ignored()
    {
        var result = _sut.TryCompile("// { not a brace\nvar x = 1;", "Test");
        Assert.True(result.IsSuccess);
    }

    [Fact]
    public void TryCompile_BlockCommentWithBraces_Ignored()
    {
        var result = _sut.TryCompile("/* { } */ var x = 1;", "Test");
        Assert.True(result.IsSuccess);
    }
}