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

namespace Api.Framework.Utils
{
    public class TaskTool
    {
        /// <summary>
        /// 最大并发
        /// </summary>
        private int max_run { get; set; }

        /// <summary>
        /// 任务管理器
        /// </summary>
        public List<Task> Tasks { get; private set; }

        /// <summary>
        /// 创建线程池
        /// </summary>
        /// <param name="max_run"></param>
        public TaskTool()
        {
            this.Tasks = new List<Task>();
        }

        /// <summary>
        /// 增加任务
        /// </summary>
        /// <param name="method"></param>
        public void AddTask(Action method)
        {
            Tasks.Add(new Task(method));
        }

        /// <summary>
        /// 执行线程池内所有线程
        /// </summary>
        /// <param name="max_sync">最大并行线程数量</param>
        /// <param name="callback">执行完成后通知</param>
        public void Start(int max_sync, AsyncCallback callback)
        {
            DateTime start_Time = DateTime.Now;
            Action action = delegate ()
            {
                //循环几次
                var _count = Tasks.Count / max_sync; if (Tasks.Count % max_sync != 0) _count++;
                for (int i = 0; i < _count; i++)
                {
                    List<Task> _runs = new List<Task>();
                    for (int j = i * max_sync; j < Tasks.Count && _runs.Count < max_sync; j++)
                    {
                        var task = Tasks[j];
                        _runs.Add(task);
                        task.Start();
                    }
                    Task.WaitAll(_runs.ToArray());
                }

            };
            if (callback == null) action.Invoke();
            else action.BeginInvoke(callback, null);
        }


        public void Clear()
        {
            this.Tasks.Clear();
        }
    }

    public static class TaskExtend
    {

        /// <summary>
        /// 不卡界面休眠
        /// </summary>
        /// <param name="obj">源</param>
        /// <param name="millisecondsTimeout">毫秒</param>
        public static void Sleep(this object obj, int millisecondsTimeout)
        {
            System.Threading.Thread t = new System.Threading.Thread(o => System.Threading.Thread.Sleep(millisecondsTimeout));
            t.Start(obj);
            while (t.IsAlive)
            {
                System.Windows.Forms.Application.DoEvents();
            }
        }
    }

}