using BPASmartClient.Helper;
using System;
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace BPASmartClient.Bus.DataBus
{
    /// <summary>
    /// 线程集中处理委托
    /// </summary>
    /// <param name="action"></param>
    public delegate void ActionKeyHandle(string action);
    public delegate void ThreadExceptionHandle(string action, Exception ex);
    public delegate void ThreadExitHandle(string action);
    /// <summary>
    /// 执行器
    /// </summary>
    public class Executer : Singleton<Executer>
    {
        private System.Timers.Timer _timer4Monitor = new System.Timers.Timer(1000);
        private ConcurrentDictionary<string, Thread> _actions = new ConcurrentDictionary<string, Thread>();
        private object _async = new object();
        public event ThreadExceptionHandle OnThreadException;
        public event ThreadExitHandle ThreadExit;
        /// <summary>
        /// 构造器
        /// </summary>
        public Executer()
        {
        }

        /// <summary>
        /// 
        /// </summary>
        public void Dispose()
        {
            _timer4Monitor.Stop();
            foreach (var th in _actions)
            {
                try { th.Value.Abort(); }
                catch (ThreadAbortException) { }
            }
        }
        /// <summary>
        /// 
        /// </summary>
        /// <returns></returns>
        public List<Thread> GetActionInfos()
        {
            Monitor.TryEnter(_async, 200);
            var actionInfos = _actions.Values.ToList();
            Monitor.Exit(_async);
            return actionInfos;
        }


        /// <summary>
        /// 
        /// </summary>
        /// <param name="key"></param>
        public void Abort(string key)
        {
            Monitor.TryEnter(_async, 200);
            if (_actions.ContainsKey(key))
            {
                try { _actions[key].Abort(); }
                catch (ThreadAbortException) { }
            }
            Monitor.Exit(_async);
        }
        /// <summary>
        /// 
        /// </summary>
        /// <param name="key"></param>
        /// <returns></returns>
        public bool ContainsKey(string key)
        {
            Monitor.TryEnter(_async, 200);
            var item = _actions[key];
            Monitor.Exit(_async);
            if (null != item)
            {
                return true;
            }
            return false;
        }
        /// <summary>
        /// 
        /// </summary>
        /// <param name="action"></param>
        /// <param name="name"></param>
        /// <param name="isBackground"></param>
        /// <param name="priority"></param>
        public void Start(Action action, string name, bool isBackground = false, ThreadPriority priority = ThreadPriority.Normal)
        {
            Thread thread = new Thread(() =>
            {
                try
                {
                    action();
                    ThreadExit?.Invoke(name);
                }
                catch (Exception ex)
                {
                    OnThreadException?.Invoke(name, ex);
                }
            });
            thread.IsBackground = isBackground;
            thread.Priority = priority;
            thread.Name = name;
            thread.Start();
            Monitor.TryEnter(_async, 50);
            if (_actions.ContainsKey(name))
            {
                try { _actions[name].Abort(); }
                catch (ThreadAbortException) { }
            }
            _actions[name] = thread;
            Monitor.Exit(_async);
        }
        /// <summary>
        /// 
        /// </summary>
        /// <param name="action"></param>
        /// <param name="timeout"></param>
        /// <returns></returns>
        public bool StartWhiteReturn(Func<bool> action, int timeout = 3)
        {
            DateTime beginTime = DateTime.Now;
            bool doResult = false;
            while (DateTime.Now.Subtract(beginTime).TotalSeconds <= 3 && !doResult)
            {
                doResult = action();
            }
            return doResult;
        }
        /// <summary>
        /// 
        /// </summary>
        public event ActionKeyHandle ActionAbort;
        /// <summary>
        /// 
        /// </summary>
        public event ActionKeyHandle ActionStarted;
    }
}