using BenchmarkDotNet.Reports;
using BenchmarkDotNet.Running;

namespace Just.PreciseMath.Benchmarks;

internal static class Program
{
    private static int Main(string[] args)
    {
        BenchmarkSwitcher switcher = BenchmarkSwitcher.FromAssembly(typeof(Program).Assembly);
        // Only these standalone discovery/help forms intentionally produce no reports.
        if (args is ["--list", "flat" or "tree"] or ["--help"] or ["-h"])
        {
            switcher.Run(args);
            return 0;
        }

        Summary[] summaries = switcher.Run(args.Length == 0 ? ["--filter", "*"] : args).ToArray();
        // BenchmarkDotNet can return normally after validation, build, or execution
        // failures. Do not let CI mistake an empty or failed run for a passing smoke test.
        if (summaries.Length == 0 || summaries.Any(summary =>
            summary.HasCriticalValidationErrors || summary.Reports.Length == 0 ||
            summary.Reports.Any(report => !report.Success || report.ResultStatistics is null)))
        {
            Console.Error.WriteLine("Benchmark run failed or produced no measurements.");
            return 1;
        }

        return 0;
    }
}