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

namespace Api.Framework.SDK
{
    /// <summary>
    /// 定时器
    /// </summary>
    public abstract class TimerTask : IDisposable
    {
        /// <summary>
        /// 是否在运行
        /// </summary>
        public new bool IsRunning { get; protected set; }
        /// <summary>
        /// 运行的数量
        /// </summary>
        public new long RunningCount { get; set; }
        /// <summary>
        /// 执行任务
        /// </summary>
        public new void ExecutionTask(object state, bool timedOut)
        {
            if (IsRunning) return;
            try
            {
                IsRunning = true;
                RunningCount++;
                this.Run(state, timedOut);
            }
            catch (Exception ex)
            {
                EventClient.OnEvent(this, $"ERROR.:{this.GetType()}-{System.Reflection.MethodBase.GetCurrentMethod().Name}-->{ex.Message},{ex.StackTrace}");
            }
            finally
            {
                IsRunning = false;
            }
        }

        /// <summary>
        /// 运行主体 - 需要重写
        /// </summary>
        public abstract void Run(object state, bool timedOut);

        /// <summary>
        /// 销毁方法 - 可以被重写
        /// </summary>
        public new virtual void Dispose() { this.IsRunning = false; }

        /// <summary>
        /// RegisterdHandler
        /// </summary>
        public new RegisteredWaitHandle RegisterdHandler { get; private set; }

        /// <summary>
        /// WaitHandler
        /// </summary>
        public new WaitHandle WaitHandler { get; private set; }

        static TimerTask() { Timers = new Dictionary<Type, TimerTask>(); }

        private static Dictionary<Type, TimerTask> Timers { get; set; }

        /// <summary>
        /// 获得定时器
        /// </summary>
        public static TimerTask GetTimer<T>()
        {
            var type = typeof(T);
            if (Timers.ContainsKey(type)) return Timers[type];
            return null;
        }

        public static T NewTimer<T>(T task, int second, object state = null)
        {
            var _t = task as TimerTask;
            if (_t == null) throw new Exception($"不支持{typeof(T)}类型,请继承[Api.Framework.TimerClient]!");
            Close<T>();
            var type = task.GetType();
            _t.WaitHandler = new AutoResetEvent(false);
            _t.RegisterdHandler = ThreadPool.RegisterWaitForSingleObject(_t.WaitHandler, new WaitOrTimerCallback(_t.ExecutionTask), state, second * 1000, false);
            Timers[type] = _t;
            return task;
        }
        /// <summary>
        /// 创建一个定时器
        /// </summary>
        /// <returns></returns>
        public static T NewTimer<T>(int second, object state = null)
        {
            if (second == 0) second = 1;
            var time = System.Activator.CreateInstance<T>();
            var _t = time as TimerTask;
            if (_t == null) throw new Exception($"不支持{typeof(T)}类型,请继承[Api.Framework.TimerClient]!");
            Close<T>();
            var type = time.GetType();
            _t.WaitHandler = new AutoResetEvent(false);
            _t.RegisterdHandler = ThreadPool.RegisterWaitForSingleObject(_t.WaitHandler, new WaitOrTimerCallback(_t.ExecutionTask), state, second * 1000, false);
            Timers[type] = _t;
            return time;
        }

        /// <summary>
        /// 关闭一个定时器
        /// </summary>
        public static new void Close<T>()
        {
            var type = typeof(T);
            if (Timers.ContainsKey(type))
            {
                var t = Timers[type];
                Timers.Remove(type);
                if (t != null && t.WaitHandler != null && t.RegisterdHandler != null)
                {
                    t.RegisterdHandler.Unregister(t.WaitHandler);
                    t.Dispose();
                }
            }
        }

        protected bool IsStart
        {
            get
            {
                if (this.WaitHandler != null && this.RegisterdHandler != null) return true;
                return false;
            }
        }

    }
}