using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace MvvmScaffoldFrame48.DLL.WindowsTools
{
    public class SystemMonitorClass
    {
        private readonly PerformanceCounter _cpuCounter;
        private readonly PerformanceCounter _ramCounter;
        Stopwatch stopwatch = Stopwatch.StartNew();
        private float HisCPUCounter = 0;

        public SystemMonitorClass()
        {
            _cpuCounter = new PerformanceCounter(
                "Processor", "% Processor Time", "_Total");

            _ramCounter = new PerformanceCounter(
                "Memory", "Available MBytes");
        }

        /// <summary>
        /// 获取CPU使用率
        /// </summary>
        /// <returns></returns>
        public float GetCpuUsage()
        {
            stopwatch.Stop();
            if (stopwatch.ElapsedMilliseconds > 1000)
            {
                stopwatch.Restart();
                HisCPUCounter = _cpuCounter.NextValue();
            }
            else
            {
                stopwatch.Start();
            }
            return HisCPUCounter;
        }

        /// <summary>
        /// 获取可用内存
        /// </summary>
        /// <returns></returns>
        public float GetAvailableMemory()
        {
            return _ramCounter.NextValue();
        }
    }
}