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

namespace Common
{
    public static class OtherHelper
    {
        /// <summary>
        /// 秒表开始
        /// </summary>
        /// <returns></returns>
        public static Stopwatch SwStart()
        {
            Stopwatch sw = new Stopwatch();
            sw.Start();
            return sw;
        }

        /// <summary>
        /// 秒表停止返回时间
        /// </summary>
        /// <param name="sw"></param>
        /// <returns></returns>
        public static double SwStop(this Stopwatch sw)
        {
            sw.Stop();
            return sw.ElapsedMilliseconds;
        }


        public delegate void DelegateSw();
        /// <summary>
        /// 无参方法执行
        /// </summary>
        /// <param name="delegateSw"></param>
        /// <returns></returns>
        public static double Sw(DelegateSw delegateSw)
        {
            var sw = SwStart();
            delegateSw();
            return sw.SwStop();
        }

        /// <summary>
        /// 根据array生x个随机数
        /// </summary>
        /// <param name="x">生成几个随机数</param>
        /// <param name="array">数组 起始数字、结束数字</param>
        /// <returns></returns>
        public static IEnumerable<int> RandomInt(int x, int[] array,List<int> list)
        {
            if (array.Length != 2)
                yield break;
            for (int i = 0; i < x; i++)
            {
                var ra = new Random(Guid.NewGuid().GetHashCode());
                var content = ra.Next(array[0], array[1] + 1);
                while (list.Contains(content))
                {
                    content = ra.Next(array[0], array[1] + 1);
                }
                yield return content;
            }
        }
    }
}