using FluentAssertions;
using IBKRTrader.Core.Logging;

namespace IBKRTrader.Tests.Logging;

[Trait("cat", "unit")]
public class LogJsonTests
{
    [Fact]
    public void RoundTrip_PreservesFields()
    {
        var ts = new DateTime(2026, 7, 30, 12, 34, 56, DateTimeKind.Utc);
        var line = LogJson.WriteLine(ts, AppLogLevel.Warn, "CT", "Kurs fehlt für AAPL", "sig-123");

        var parsed = LogJson.ParseLine(line);

        parsed.Should().NotBeNull();
        parsed!.Ts.Should().Be(ts);
        parsed.Level.Should().Be("Warn");
        parsed.Source.Should().Be("CT");
        parsed.Cid.Should().Be("sig-123");
        parsed.Message.Should().Be("Kurs fehlt für AAPL");
    }

    [Fact]
    public void WriteLine_OmitsCid_WhenNull()
    {
        var line = LogJson.WriteLine(DateTime.UtcNow, AppLogLevel.Info, "Core", "hello", null);

        line.Should().NotContain("cid");
        LogJson.ParseLine(line)!.Cid.Should().BeNull();
    }

    [Theory]
    [InlineData("")]
    [InlineData("   ")]
    [InlineData("nicht json")]
    [InlineData("{ kaputt")]
    public void ParseLine_ReturnsNull_OnGarbage(string input)
    {
        LogJson.ParseLine(input).Should().BeNull();
    }
}