using CoreAgent.Domain.Interfaces.Network;
using CoreAgent.Domain.Interfaces.ProtocolLogHandlers;
using CoreAgent.Domain.Models.Network;
using CoreAgent.Infrastructure.Contexts;
using Microsoft.Extensions.Logging;
using System;
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace CoreAgent.Infrastructure.Services.ProtocolLogHandlers
{
    /// <summary>
    /// 协议日志提供者观察者
    /// 负责接收、缓存和转发协议日志数据
    /// 使用生产者-消费者模式处理日志数据流
    /// </summary>
    public class ProtocolLogsProviderObserver : IProtocolLogsProviderObserver
    {
        /// <summary>
        /// 用于存储待处理的协议日志消息的阻塞队列
        /// </summary>
        private readonly static BlockingCollection<string> BlockingQueue = new BlockingCollection<string>();
        
        /// <summary>
        /// 日志记录器
        /// </summary>
        private readonly ILogger logger;
        
        /// <summary>
        /// 网络上下文，用于检查网络状态
        /// </summary>
        private readonly CellularNetworkContext networkContext;
        

        /// <summary>
        /// 初始化协议日志提供者观察者
        /// </summary>
        /// <param name="networkContext">网络上下文</param>
        /// <param name="logger">日志记录器</param>
        public ProtocolLogsProviderObserver(CellularNetworkContext networkContext, ILogger logger)
        {
            this.logger = logger ?? throw new ArgumentNullException(nameof(logger));
            this.networkContext = networkContext ?? throw new ArgumentNullException(nameof(networkContext));
            
            logger.LogInformation("ProtocolLogsProviderObserver 初始化完成");
            _ = Task.Run(Consumer);
            logger.LogInformation("消费者任务已启动");
        }

        /// <summary>
        /// 接收并处理新的协议日志数据
        /// </summary>
        /// <param name="msg">协议日志消息</param>
        public void OnData(string msg)
        {
            if (string.IsNullOrEmpty(msg))
            {
                logger.LogWarning("收到空的协议日志消息");
                return;
            }

            try
            {
                logger.LogDebug("收到新的协议日志消息: {Message}", msg);
                Producer(msg);
            }
            catch (Exception ex)
            {
                logger.LogError(ex, "处理协议日志消息时发生错误: {Message}", msg);
            }
        }

        /// <summary>
        /// 生产者方法：将消息添加到阻塞队列中
        /// </summary>
        /// <param name="message">要添加的消息</param>
        private void Producer(string message)
        {
            try
            {
                var networkState = networkContext.GetNetworkState();
                if (networkState.CurrentStatus == NetworkStatus.Connected)
                {
                    logger.LogDebug("网络已连接，将消息添加到队列: {Message}", message);
                    BlockingQueue.Add(message);
                }
                else
                {
                    logger.LogWarning("网络未连接，丢弃消息: {Message}", message);
                }
            }
            catch (Exception ex)
            {
                logger.LogError(ex, "添加消息到队列时发生错误: {Message}", message);
                throw;
            }
        }

        /// <summary>
        /// 消费者方法：从队列中获取并处理消息
        /// </summary>
        public async Task Consumer()
        {
            logger.LogInformation("消费者任务开始运行");
            
            try
            {
                while (networkContext.GetNetworkState().CurrentStatus == NetworkStatus.Connected)
                {
                    try
                    {
                        if (BlockingQueue.TryTake(out var message, TimeSpan.FromMilliseconds(1000)))
                        {
                            logger.LogDebug("从队列中获取到消息: {Message}", message);
                            // TODO: 实现消息发送逻辑
                            // await client.SendAsync(message, true);
                        }
                        else
                        {
                            await Task.Delay(1000);
                        }
                    }
                    catch (Exception ex)
                    {
                        logger.LogError(ex, "处理队列消息时发生错误");
                        await Task.Delay(1000); // 发生错误时等待一段时间再继续
                    }
                }
            }
            catch (OperationCanceledException)
            {
                logger.LogWarning("消费者任务被取消");
            }
            catch (Exception ex)
            {
                logger.LogError(ex, "消费者任务发生未处理的错误");
            }
            finally
            {
                logger.LogInformation("消费者任务已结束");
            }
        }
    }
}