using Hexus.Daemon.Services;
using System.Diagnostics;

namespace Hexus.Daemon.Extensions;

internal static class ProcessExtensions
{
    public static double GetProcessCpuUsage(this Process process, ProcessStatisticsService.CpuStatistics cpuStatistics)
    {
        var currentTime = DateTimeOffset.UtcNow;
        var deltaTime = currentTime - cpuStatistics.LastTime;

        var totalProcessTime = process.TotalProcessorTime;
        var deltaProcessTime = totalProcessTime - cpuStatistics.LastTotalProcessorTime;

        var cpuUsage = deltaProcessTime / Environment.ProcessorCount / deltaTime;

        cpuStatistics.LastTotalProcessorTime = totalProcessTime;
        cpuStatistics.LastTime = currentTime;

        return cpuUsage * 100;
    }
}