using System;
using BenchmarkDotNet.Configs;
using BenchmarkDotNet.Jobs;
using Perfolizer.Horology;

namespace Umbraco.Tests.Benchmarks.Config
{
    /// <summary>
    /// Configures the benchmark to run with less warmup and a shorter iteration time than the standard benchmark.
    /// </summary>
    [AttributeUsage(AttributeTargets.Class, AllowMultiple = false)]
    public class QuickRunConfigAttribute : Attribute, IConfigSource
    {
        /// <summary>
        /// Initializes a new instance of the <see cref="QuickRunConfigAttribute"/> class.
        /// </summary>
        public QuickRunConfigAttribute()
        {
            this.Config = (ManualConfig)ManualConfig.CreateEmpty()
                .With(Job.Default.WithLaunchCount(1) // benchmark process will be launched only once
                .WithIterationTime(new TimeInterval(100, TimeUnit.Millisecond)) // 100ms per iteration
                .WithWarmupCount(3) // 3 warmup iteration
                .WithIterationCount(3)); // 3 target iteration
        }

        /// <summary>
        /// Gets the manual configuration.
        /// </summary>
        protected ManualConfig Config { get; }

        /// <inheritdoc/>
        IConfig IConfigSource.Config => this.Config;
    }
}