using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using Common.DbExtends.Extends;

namespace Server.Services
{
    /// <summary>
    /// 控制多线程任务等待帮助服务
    /// </summary>
    public class WaitTaskThreadService
    {
        /// <summary>
        /// 等待
        /// </summary>
        private List<ManualResetEvent> manualEvents = new List<ManualResetEvent>();
        /// <summary>
        /// 启动任务
        /// </summary>
        /// <param name="name"></param>
        /// <param name="action"></param>
        /// <param name="stateObject"></param>
        public void StartThread(string name, Action<object> action, object stateObject)
        {
            var mre = new ManualResetEvent(false);
            manualEvents.Add(mre);
            var th = new Thread(o =>
            {
                var result = o as WaitTaskThreadObject;
                try
                {
                    result?.Action?.Invoke(result.StateObject);
                }
                catch (Exception e)
                {
                    Client.SingleClient.Db.OnLog("处理任务" + name, e);
                    throw e;
                }
                finally
                {
                    result?.ManualResetEvent.Set();
                }
            });
            th.Name = name;
            th.Start(new WaitTaskThreadObject()
            {
                Name = name,
                StateObject = stateObject,
                Action = action,
                ManualResetEvent = mre
            });
        }
        /// <summary>
        /// 启动任务
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="name"></param>
        /// <param name="action"></param>
        /// <param name="stateObject"></param>
        public void StartThread<T>(string name, Action<T> action, T stateObject = default)
        {
            StartThread(name, (o) =>
            {
                action?.Invoke((T)o);
            }, (object)stateObject);
        }
        /// <summary>
        /// 启动任务
        /// </summary>
        /// <param name="name"></param>
        /// <param name="action"></param>
        public void StartThread(string name, Action action)
        {
            StartThread(name, (o) =>
            {
                action?.Invoke();
            }, null);
        }
        /// <summary>
        /// 等待全部任务完成
        /// </summary>
        public void WaitAll()
        {
            WaitHandle.WaitAll(manualEvents.ToArray());
        }
    }

    /// <summary>
    /// 线程启动参数数据
    /// </summary>
    public class WaitTaskThreadObject
    {
        /// <summary>
        /// 线程名称，（调试用）
        /// </summary>
        public string Name { get; set; }
        /// <summary>
        /// 线程对象
        /// </summary>
        public object StateObject { get; set; }
        /// <summary>
        /// 执行具体方法
        /// </summary>
        public Action<object> Action { get; set; }
        /// <summary>
        /// 线程同步事件
        /// </summary>
        public ManualResetEvent ManualResetEvent { get; set; }
    }
}