using System.IO;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using FluentAssertions;
using StellaOps.Signals.Models;
using StellaOps.Signals.Parsing;
using Xunit;

namespace StellaOps.Signals.Tests;

public sealed class SimpleJsonCallgraphParserGateTests
{
    [Fact]
    public async Task ParseAsync_parses_gate_fields_on_edges()
    {
        var json = """
        {
          "schema_version": "1.0",
          "nodes": [
            { "id": "main" },
            { "id": "target" }
          ],
          "edges": [
            {
              "from": "main",
              "to": "target",
              "kind": "call",
              "gate_multiplier_bps": 3000,
              "gates": [
                {
                  "type": "authRequired",
                  "detail": "[Authorize] attribute",
                  "guard_symbol": "main",
                  "source_file": "/src/app.cs",
                  "line_number": 42,
                  "confidence": 0.9,
                  "detection_method": "pattern"
                }
              ]
            }
          ]
        }
        """;

        var parser = new SimpleJsonCallgraphParser("csharp");
        await using var stream = new MemoryStream(Encoding.UTF8.GetBytes(json), writable: false);
        var parsed = await parser.ParseAsync(stream, CancellationToken.None);

        parsed.Edges.Should().ContainSingle();
        var edge = parsed.Edges[0];
        edge.GateMultiplierBps.Should().Be(3000);
        edge.Gates.Should().NotBeNull();
        edge.Gates!.Should().ContainSingle();
        edge.Gates[0].Type.Should().Be(CallgraphGateType.AuthRequired);
        edge.Gates[0].GuardSymbol.Should().Be("main");
        edge.Gates[0].SourceFile.Should().Be("/src/app.cs");
        edge.Gates[0].LineNumber.Should().Be(42);
        edge.Gates[0].DetectionMethod.Should().Be("pattern");
    }
}