using FreeRedis;
using System;
using System.Collections.Concurrent;
using System.Linq.Expressions;
using System.Threading;
using System.Threading.Channels;

namespace WCS.Core
{
    public static class Ltc
    {
        public static T GetWorld<T>() where T : World
        {
            return (T)World.Worlds.Where(v => v.GetType() == typeof(T)).First();
        }

        public static T GetSystem<T>() where T : SystemBase
        {
            return (T)World.Worlds.SelectMany(v => v.Systems).Where(v => v.GetType() == typeof(T)).First();
        }


        private static ConcurrentDictionary<Thread, Channel> Channels = new ConcurrentDictionary<Thread, Channel>(); 

        public static void SetChannel(Channel channel)
        {
            Channels[Thread.CurrentThread] = channel;
        }

        public static Channel GetChannel()
        {
            return Channels[Thread.CurrentThread];
        }

        static ConcurrentDictionary<Channel, List<LogInfo>> Msgs = new ConcurrentDictionary<Channel, List<LogInfo>>();


        public static void ClearChannel()
        {
            if (Msgs.TryGetValue(GetChannel(), out var list))
                list.Clear();
        }

        public static string GetLogStr()
        {
            var channel = GetChannel();
            if (Msgs.TryGetValue(channel, out var list))
            {
                var msg = "-------------------"+channel + "--------------------\n" + string.Join('\n', list.Select(v => $"{string.Join('\n', v)}"));
                return msg;
            }
            else
            {
                return "";
            } 
        }

        public static List<LogInfo> GetLogInfo()
        {
            var channel = GetChannel();
            if (Msgs.TryGetValue(channel, out var list))
            {
                return list;
            }
            return new List<LogInfo>();
        }

        public static void Log(string msg,LogLevel level,ErrorType type)
        { 
            var channel = GetChannel();
            
            if (!Msgs.TryGetValue(channel, out var list))
            {
                list = new List<LogInfo>();
                Msgs[channel] = list;
            }
            list.Add(new LogInfo { Message = msg, Level = level, Type = type, Channel = channel });
        }
  
        public static void Publish(World world)
        { 
            var channel = GetChannel();
            if (Msgs.TryGetValue(channel, out var list))
            {
                var msg = string.Join('\n', list); 
                world.Ex().Publish(channel, msg); 
            } 
        } 

        private static string ResultString<T>(T obj)
        {
            if (obj == null)
            {
                return "null";
            }
            else if (obj is bool)
            {
                var b = obj as Boolean?;
                return b.Value ? "成立" : "不成立";
            }
            else if (obj is System.Collections.ICollection)
            {
                var coll = obj as System.Collections.ICollection;
                return coll.Count.ToString() + "元素";
            }

            return obj.ToString();
        }

        public static T Do<T>(Expression<Func<T>> exp)
        {
            var msg = exp.ExpToString();
            msg += "  结果:";
            try
            {
                var res = exp.Compile().Invoke();
                msg += res;
                return res;
            }
            catch (Exception ex)
            { 
                throw;
            }
            finally
            {
                Log(msg, LogLevel.低, ErrorType.已知);
            }
        }

        public static T Do<T1, T>(T1 obj, Expression<Func<T1, T>> exp)
        {
            var msg = "";
            try
            {
                try
                {
                    msg = exp.ExpToString();
                }
                catch (Exception ex2)
                {
                }
                msg += "  结果:";
                var res = exp.Compile().Invoke(obj);
                msg += ResultString(res);
                return res;
            }
            catch (Exception ex)
            {  
                throw;
            }
            finally
            {
                Log(msg, LogLevel.低, ErrorType.已知);
            }
        }

        public static T Do<T1, T2, T>(T1 obj, T2 obj2, Expression<Func<T1, T2, T>> exp)
        {
            var msg = exp.ExpToString();
            msg += "  结果:";
            try
            {
                var res = exp.Compile().Invoke(obj, obj2);
                msg += ResultString(res);
                return res;
            }
            catch (Exception ex)
            { 
                throw;
            }
            finally
            {
                Log(msg, LogLevel.低, ErrorType.已知);
            }
        }

        public static T Do<T1, T2, T3, T>(T1 obj, T2 obj2, T3 obj3, Expression<Func<T1, T2, T3, T>> exp)
        {
            var msg = exp.ExpToString();
            msg += "  结果:";
            try
            {
                var res = exp.Compile().Invoke(obj, obj2, obj3);
                msg += ResultString(res);
                return res;
            }
            catch (Exception ex)
            { 
                throw;
            }
            finally
            {
                Log(msg, LogLevel.低, ErrorType.已知);
            }
        }
    }

    public class LogInfo
    {
        public ErrorType Type { get; set; }
        public LogLevel Level { get; set; }
        public Channel Channel { get; set; }
        public string Message { get; set; } = "";

        public override string ToString()
        {
            return $"类型:{Type},级别:{Level},内容:{Message}";
        }
    }

    public class Channel
    {
        public string World;
        public string System;
        public string Item;

        public override string ToString()
        {
            return $"{World}-{System}-{Item}";
        }
    }

    public enum ErrorType
    {
        未知 = 0,
        已知 = 1
    }

    public enum LogLevel
    {
        低 = 0,
        中 = 1,
        高 = 2
    }

    public class KnownException : Exception
    { 
        public LogLevel Level { get; set; }

        public KnownException(string msg, LogLevel level) : base(msg)
        {
            this.Level = level;
        }
    }
}