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

namespace Kingo.ThreadManager
{
    public class ThreadManager2
    {
        //public static ThreadManager2 Instance { get; } = new ThreadManager2();
        private List<TaskInfo> TaskList = new List<TaskInfo>();
        private List<CustomThread> ThreadList = new List<CustomThread>();
        private int _ActiveCount;
        //public int ActiveCount
        //{
        //    get
        //    {
        //        return ThreadList.FindAll(f => f.IsActive).Count;
        //    }
        //}
        ManualResetEvent _PoolEvent = new ManualResetEvent(true);
        private int _MaxThreadNum = -1;
        public int MaxThreadNum
        {
            get
            {
                if (_MaxThreadNum == -1)
                {
                    _MaxThreadNum = Environment.ProcessorCount - 2;
                }
                return _MaxThreadNum;
            }
            set
            {
                _MaxThreadNum = value;
            }
        }
        public ThreadManager2()
        {

        }
        public List<TaskInfo> GetTaskList()
        {
            return TaskList;
        }
        //private bool IsExt = false;

        public void ExeTask()
        {
            while (true)
            {
                _PoolEvent.WaitOne();
                TaskList.RemoveAll(p => p.IsComplete);
                if (TaskList.Count == 0) break;
                var t = TaskList.FirstOrDefault(f => f.IsWait);
                if (t != null)
                {
                    CustomThread taskExe = FindThread();
                    if (taskExe != null)
                    {
                        taskExe.Start(t);
                    }
                    else
                    {
                        _PoolEvent.Reset();
                        continue;
                    }
                }
                else
                {
                    _PoolEvent.Reset();
                }
            }
        }
        public void AddTask(TaskInfo pTask)
        {
            lock (TaskList)
            {
                TaskList.Add(pTask);
                _PoolEvent.Set();
            }
            //CustomThread t = FindThread();
            //t.Start(pTask.ExeFun, pTask.Parameter, pTask.ExeComplatFun);
        }
        public CustomThread FindThread()
        {
            lock (ThreadList)
            {
                ThreadList.RemoveAll(p => p.IsActive);
                //CustomThread task = ThreadList.FirstOrDefault(f => !f.IsActive);
                //if (task == null)
                //{
                if (ThreadList.Count < MaxThreadNum * 3)
                {
                    CustomThread task = new CustomThread(_PoolEvent);
                    ThreadList.Add(task);
                    return task;
                }
                else
                {
                    return null;
                }
                //}
                //else
                //{
                //    return task;
                //}
            }
        }
        public void Test(object o)
        { }
        public static void InitThreadList()
        {
            //Threads = new ArrayList();
            //for (int i = 0; i < 1; i++)
            //{
            //    CustomThread t = new CustomThread();
            //    Threads.Add(t);
            //}
        }
    }
}