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


/* ***********************************************
 * subject  Byte类型数据总线，在订阅推送模式基础上
 *          增加主动获取
 * author   张原川
 * date     2019/6/3 14:44:36 
 * ***********************************************/

namespace BPASmartClient.Bus.DataBus
{
    public class DataBus_Byte : DataBus_Currency<byte>, IGivenDataBus<byte>
    {
        //接收数据缓冲(用以Get)
        //protected CircularBuffer<byte> _givenDataPool = new CircularBuffer<byte>(1 * 1024 * 1024);
        protected ConcurrentQueue<byte> _givenDataPool = new ConcurrentQueue<byte>();

        public new int DataCount { get { return _givenDataPool.Count; } }

        /// <summary>
        /// 重写Put方法，加入givenDataPool
        /// </summary>
        public new void Put(byte data)
        {
            if (!_running)
                return;
            if (_multDataHandlers.Count > 0 || _singleDataHandlers.Count > 0)
                _dataPool.Enqueue(data);
            _givenDataPool.Enqueue(data);
        }

        /// <summary>
        /// 重写Put方法，加入givenDataPool
        /// </summary>
        public new void Put(byte[] data)
        {
            if (!_running)
                return;
            if (_multDataHandlers.Count > 0 || _singleDataHandlers.Count > 0)
                foreach (var item in data)
                    _dataPool.Enqueue(item);
            foreach (var item in data)
                _givenDataPool.Enqueue(item);
        }

        /// <summary>
        /// 数据取出
        /// </summary>
        public byte Get()
        {
        agin:
            if (_givenDataPool.Count <= 0)
            {
                Thread.Sleep(5);
                goto agin;
            }
            byte res;
            while (!_givenDataPool.TryDequeue(out res)) ;
            return res;
        }

        /// <summary>
        /// 数据取出
        /// </summary>
        public byte[] Get(int count)
        {
        agin:
            if (_givenDataPool.Count < count)
            {
                Thread.Sleep(5);
                goto agin;
            }
            //Console.WriteLine(_givenDataPool.Size + "===========" + _dataPool.Size);
            //for (int i = 0; i < count; i++) {
            //    _givenDataPool.TryDequeue
            //}
            int i = 0;
            byte[] result = new byte[count];
            while (i < count)
            {
                if (_givenDataPool.TryDequeue(out result[i]))
                {
                    i++;
                }
            }

            return result;// _givenDataPool.Get(count);
        }
    }
}