using RabbitMQ.Client;
using RabbitMQ.Client.Events;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using IStation.IDataDockingQueue;

namespace IStation.DataDockingQueue
{
    public class HandleHelper : IHandleHelper
    {
        //连接工厂
        private static ConnectionFactory Factory = new ConnectionFactory()
        {
            HostName = ConfigHelper.RabbitMq_HostName,
            UserName = ConfigHelper.RabbitMq_UserName,
            Password = ConfigHelper.RabbitMq_Password
        };

        private IConnection _conn_receive = null;//接收连接对象
        private IModel _channel_receive = null;//接收会话

        /// <summary>
        /// 推入数据
        /// </summary>
        public bool Push<T>(string flag, T t)
        {
            if (t == null)
                return default;

            try
            {
                var queueName = QueueHelper.GetQueueName(flag);
                using (var con = Factory.CreateConnection())//创建连接对象
                {
                    using (var channel = con.CreateModel())
                    {
                        channel.QueueDeclare(queueName, true, false, false, null);//定义通道
                        var properties = channel.CreateBasicProperties();
                        properties.Persistent = true;//数据持久化
                        var message = JsonHelper.Object2Json(t);
                        var body = Encoding.UTF8.GetBytes(message);
                        channel.BasicPublish("", queueName, properties, body);//插入数据
                    }
                }
                return true;
            }
            catch (Exception ex)
            {
                LogHelper.Error(ex.Message, ex);
                return false;
            }
        }

        /// <summary>
        /// 接收数据
        /// </summary>
        public void Receive<T>(string flag, Func<T, bool> func)
        {
            if (_conn_receive != null)
                return;
            if (_channel_receive != null)
                return;
            var queueName = QueueHelper.GetQueueName(flag);
            _conn_receive = Factory.CreateConnection();//创建连接对象
            _channel_receive = _conn_receive.CreateModel();
            _channel_receive.QueueDeclare(queueName, true, false, false, null);//定义通道
            _channel_receive.BasicQos(0, 1, false);//公平分发
            var consumer = new EventingBasicConsumer(_channel_receive);//创建消费者

            consumer.Received += (model, ea) =>
            {
                byte[] body = ea.Body.ToArray();
                var message = Encoding.UTF8.GetString(body);
                var data = JsonHelper.Json2Object<T>(message);
                var result = func(data);
                if (result)
                {
                    _channel_receive.BasicAck(ea.DeliveryTag, false);
                }
                else
                {
                    _channel_receive.BasicNack(ea.DeliveryTag, false, true);
                }
            };
            _channel_receive.BasicConsume(queueName, false, consumer);//开始消费
        }

        /// <summary>
        /// 关闭
        /// </summary>
        public void Close()
        {
            if (_channel_receive != null)
            {
                if (_channel_receive.IsOpen)
                {
                    _channel_receive.Close();
                }
            }
            if (_conn_receive != null)
            {
                if (_conn_receive.IsOpen)
                {
                    _conn_receive.Close();
                }
            }
        }

    }
}