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

namespace Helpers
{
    public static class GlobalStopwatch
    {
        private static Stopwatch Stopwatch { get; set; }

        static GlobalStopwatch()
        {
            Stopwatch = new Stopwatch();
        }

        public static void Start()
        {
            if (!Stopwatch.IsRunning)
            {
                _previousEllapsedMillis = 0;
                Stopwatch.Start();
            }
        }

        public static void Stop() => Stopwatch.Stop();

        public static void Restart()
        {
            _previousEllapsedMillis = 0;
            Stopwatch.Restart();
        }

        private static long _previousEllapsedMillis;
        public static long EllapsedMillisPrevious
        {
            get
            {
                var ellapsed = EllapsedMillis;
                var result = ellapsed - _previousEllapsedMillis;
                _previousEllapsedMillis = ellapsed;

                return result;
            }
        }

        public static long EllapsedMillis => Stopwatch.ElapsedMilliseconds;

        public static bool IsRunning
        {
            get
            {
                return Stopwatch.IsRunning;
            }
        }

        public static void Print(string label)
        {
            if (label != null)
            {
                Debug.WriteLine($"{label}: {EllapsedMillis}");
            }
            else
            {
                Debug.WriteLine(EllapsedMillis);
            }
        }

        public static void PrintWithLastTime(string label)
        {
            if (label != null)
            {
                Debug.WriteLine($"{label}: {EllapsedMillisPrevious}");
            }
        }
        public static void PrintSecs(string label)
        {
            var secs = Math.Round((decimal)EllapsedMillis / 1000, 2);
            if (label != null)
            {
                Debug.WriteLine($"{label}: {secs}");
            }
            else
            {
                Debug.WriteLine(secs);
            }
        }

        public static void PrintWithLastTimeSecs(string label)
        {
            var secs = Math.Round((decimal)EllapsedMillisPrevious / 1000, 2);
            if (label != null)
            {
                Debug.WriteLine($"{label}: {secs}");
            }
        }
    }
}