using System.Text.Json;
using StellaOps.Bench.ScannerAnalyzers;
using StellaOps.Bench.ScannerAnalyzers.Baseline;
using StellaOps.Bench.ScannerAnalyzers.Reporting;
using Xunit;

namespace StellaOps.Bench.ScannerAnalyzers.Tests;

public sealed class BenchmarkJsonWriterTests
{
    [Fact]
    public async Task WriteAsync_EmitsMetadataAndScenarioDetails()
    {
        var metadata = new BenchmarkJsonMetadata("1.0", DateTimeOffset.Parse("2025-10-23T12:00:00Z"), "abc123", "ci");
        var result = new ScenarioResult(
            "scenario",
            "Scenario",
            SampleCount: 5,
            MeanMs: 10,
            P95Ms: 12,
            MaxMs: 20,
            Iterations: 5,
            ThresholdMs: 5000);
        var baseline = new BaselineEntry("scenario", 5, 5, 9, 11, 10);
        var report = new BenchmarkScenarioReport(result, baseline, 1.2);

        var path = Path.Combine(Path.GetTempPath(), $"bench-{Guid.NewGuid():N}.json");
        await BenchmarkJsonWriter.WriteAsync(path, metadata, new[] { report }, CancellationToken.None);

        using var document = JsonDocument.Parse(await File.ReadAllTextAsync(path));
        var root = document.RootElement;

        Assert.Equal("1.0", root.GetProperty("schemaVersion").GetString());
        Assert.Equal("abc123", root.GetProperty("commit").GetString());
        var scenario = root.GetProperty("scenarios")[0];
        Assert.Equal("scenario", scenario.GetProperty("id").GetString());
        Assert.Equal(20, scenario.GetProperty("maxMs").GetDouble());
        Assert.Equal(10, scenario.GetProperty("baseline").GetProperty("maxMs").GetDouble());
        Assert.True(scenario.GetProperty("regression").GetProperty("breached").GetBoolean());
    }
}