using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using CoreAgent.ProtocolClient.Context;
using CoreAgent.ProtocolClient.Managers.WebSocketMgr;
using CoreAgent.ProtocolClient.Models;
using Microsoft.Extensions.Logging;
using Newtonsoft.Json.Linq;
using Newtonsoft.Json;

namespace CoreAgent.ProtocolClient.ProtocolEngineCore
{
    /// <summary>
    /// 日志消息处理器
    /// 负责处理WebSocket消息和日志获取相关的逻辑
    /// </summary>
    public class LogMessageHandler
    {
        private readonly ProtocolClientConfig _config;
        private readonly ProtocolClientContext _context;
        private readonly ILogger _logger;
        private readonly WebSocketMessageManager _messageManager;

        public LogMessageHandler(ProtocolClientConfig config, ProtocolClientContext context, ILogger logger, WebSocketMessageManager messageManager)
        {
            _config = config;
            _context = context;
            _logger = logger;
            _messageManager = messageManager;
        }

        /// <summary>
        /// 处理接收到的WebSocket消息
        /// </summary>
        /// <param name="message">接收到的消息</param>
        public void HandleMessage(JObject message)
        {
            var messageType = message["message"]?.ToString();
            if (messageType == "log_get")
            {
                ParseLogGetResponse(message);
            }
        }

        /// <summary>
        /// 发起日志获取请求
        /// </summary>
        /// <param name="parameters">请求参数</param>
        public void GetLogs(Dictionary<string, object>? parameters = null)
        {
            var layers = new JObject();
            if (_config.Logs?.Layers != null)
            {
                foreach (var layerKvp in _config.Logs.Layers)
                {
                    layers[layerKvp.Key] = layerKvp.Value.Filter;
                }
            }

            var message = new JObject
            {
                ["timeout"] = 1,
                ["min"] = 64,
                ["max"] = 2048,
                ["layers"] = layers,
                ["message"] = "log_get",
                ["headers"] = _context.FeatureFlags.IsFirstGetLogs
            };

            if (_context.FeatureFlags.IsFirstGetLogs)
            {
                _context.FeatureFlags.IsFirstGetLogs = false;
            }

            if (parameters != null)
            {
                foreach (var param in parameters)
                {
                    message[param.Key] = JToken.FromObject(param.Value);
                }
            }

            var oldLogGetId = _messageManager.MessageIdManager.CurrentLogGetMessageId;
            var newLogGetId = _messageManager.SendLogGetMessage(message, ParseLogGetResponse);
            _logger.LogDebug($"[{_config.Name}] LogGet ID change: {oldLogGetId} -> {newLogGetId}, Params: {JsonConvert.SerializeObject(parameters)}");
        }

        /// <summary>
        /// 解析日志获取响应
        /// </summary>
        /// <param name="msg">响应消息</param>
        private void ParseLogGetResponse(JObject msg)
        {

            var currentLogGetId = _messageManager.MessageIdManager.CurrentLogGetMessageId;
            var json = msg.ToObject<SourceProtocolLog>();

            if (json != null)
            {
                // 触发日志处理事件
                OnLogReceived?.Invoke(json);
            }

            if (msg["message_id"]?.Value<int>() == currentLogGetId)
            {
                string data = $"[{_config.Name}] Received last LogGet response for message_id={currentLogGetId}, fetching next batch.";
                _logger.LogDebug(data);
                GetLogs(); // Continue the log polling
            }
            else
            {
                _logger.LogDebug($"[{_config.Name}] Received LogGet response for message_id={msg["message_id"]?.Value<int>()}, but current LogGet ID is {currentLogGetId}. Ignoring.");
            }
        }

        /// <summary>
        /// 重置日志
        /// </summary>
        public void ResetLogs()
        {
            if (_context.State == Enums.ClientState.Connected)
            {
                _messageManager.SendMessage(new JObject { ["message"] = "log_reset" }, response =>
                {
                    _context.LogContext.ResetLogs();
                });
            }
            else
            {
                _context.LogContext.ResetLogs();
            }
        }

        /// <summary>
        /// 设置日志配置
        /// </summary>
        /// <param name="logsConfig">日志配置</param>
        /// <param name="save">是否保存配置</param>
        public void SetLogsConfig(ProtocolClientLogsConfig logsConfig, bool save = false)
        {
            var logsPayload = new JObject();
            var layersPayload = new JObject();

            foreach (var layerKvp in logsConfig.Layers)
            {
                layersPayload[layerKvp.Key] = JObject.FromObject(new
                {
                    level = layerKvp.Value.Level,
                    maxSize = layerKvp.Value.MaxSize,
                    payload = layerKvp.Value.Payload
                });
            }

            logsPayload["layers"] = layersPayload;
            if (logsConfig.Signal.HasValue) logsPayload["signal"] = logsConfig.Signal.Value;
            if (logsConfig.Cch.HasValue) logsPayload["cch"] = logsConfig.Cch.Value;

            _messageManager.SendMessage(new JObject { ["message"] = "config_set", ["logs"] = logsPayload }, response =>
            {
                if (save)
                {
                    _config.Logs = logsConfig;
                }
                GetLogs(new Dictionary<string, object> { ["timeout"] = 0 });
            }, true);
        }

        /// <summary>
        /// 日志接收事件
        /// </summary>
        public event Action<SourceProtocolLog>? OnLogReceived;
    }
}