using System;
using System.Reflection;
using System.Text;
using GameNetworkLayer.Shared;
using HarmonyLib;
using NetworkFramework.Shared;

namespace CLre_server.API.Tools
{
    public class NetServerSender
    {
        private struct DummyNetDataStruct : ISerializedNetData
        {
            public byte[] Serialize()
            {
                return new byte[0];
            }

            public void Deserialize(byte[] data)
            {
            }
        }

        private static readonly MethodInfo _genericSendMessage = AccessTools.Method("GameNetworkLayer.Server.NetMessageServerSender:SendMessage");

        private static readonly MethodInfo _genericGetSendMessageMethod =
            AccessTools.Method(typeof(NetServerSender), "GetSendMessageMethod",parameters: new Type[0]);/*
            /*((Func<MethodInfo>) GetSendMessageMethod<DummyNetDataStruct>).Method
            .GetBaseDefinition()
            .GetGenericMethodDefinition();*/
        
        private static readonly MethodInfo _genericLog = 
            AccessTools.Method(typeof(NetServerSender), "Log");/*
            ((Action<NetworkDispatcherCode, DummyNetDataStruct>) Log<DummyNetDataStruct>).Method
            .GetBaseDefinition()
            .GetGenericMethodDefinition();*/
        
        private static readonly MethodInfo _genericGetLogMethod =
            AccessTools.Method(typeof(NetServerSender), "GetLogMethod", new Type[0]);/*
            ((Func<MethodInfo>) GetLogMethod<DummyNetDataStruct>).Method
            .GetBaseDefinition()
            .GetGenericMethodDefinition();*/

        public static MethodInfo GetSendMessageMethod(Type t)
        {
            return (MethodInfo) _genericGetSendMessageMethod.MakeGenericMethod(t)
                .Invoke(null, new object[0]);
        }

        public static MethodInfo GetSendMessageMethod<T>() where T : struct, ISerializedNetData
        {
            return _genericSendMessage.MakeGenericMethod(typeof(T));
        }

        public static MethodInfo DebugSendMessage<T>(Harmony instance = null, MethodInfo before = null, MethodInfo after = null, MethodInfo transpiler = null, MethodInfo finalizer = null) where T : struct, ISerializedNetData
        {
            return DebugSendMessage(typeof(T), instance, before, after, transpiler, finalizer);
        }
        
        public static MethodInfo DebugSendMessage(Type generic, Harmony instance = null, MethodInfo before = null, MethodInfo after = null, MethodInfo transpiler = null, MethodInfo finalizer = null)
        {
            return DebugSendMessage(
                generic, instance,
                before == null ? null : new HarmonyMethod(before),
                after == null ? null : new HarmonyMethod(after),
                transpiler == null ? null : new HarmonyMethod(transpiler),
                finalizer == null ? null : new HarmonyMethod(finalizer));
        }
        
        public static MethodInfo DebugSendMessage<T>(Harmony instance = null, HarmonyMethod before = null, HarmonyMethod after = null, HarmonyMethod transpiler = null, HarmonyMethod finalizer = null) where T : struct, ISerializedNetData
        {
            return DebugSendMessage(typeof(T), instance, before, after, transpiler, finalizer);
        }
        
        public static MethodInfo DebugSendMessage(Type generic, Harmony instance = null, HarmonyMethod before = null, HarmonyMethod after = null, HarmonyMethod transpiler = null, HarmonyMethod finalizer = null)
        {
            if (instance == null) instance = CLre.harmonyInstance;
            MethodInfo target = GetSendMessageMethod(generic);
            return instance.Patch(target,
                before,
                after,
                transpiler,
                finalizer);
        }

        public static MethodInfo GetLogMethod(Type t)
        {
            return (MethodInfo) _genericGetLogMethod.MakeGenericMethod(t)
                .Invoke(null, new object[0]);
        }
        
        public static MethodInfo GetLogMethod<T>() where T : struct, ISerializedNetData
        {
            return _genericLog.MakeGenericMethod(typeof(T));
        }
        
        private static void Log<T>(NetworkDispatcherCode code, ref T data) where T : struct, ISerializedNetData
        {
            //Utility.Logging.Log($"Sending ISerializedNetData {data.GetType().FullName} (code: {code.ToString()})");
            Traverse d = Traverse.Create(data);
            string codeName = (short) code > 217 ? "CUSTOM" : code.ToString();
            StringBuilder sb = new StringBuilder($"Sending ISerializedNetData {data.GetType().FullName} (code: {codeName} {(short)code})");
            foreach (string fieldName in d.Fields())
            {
                Traverse field = d.Field(fieldName);
                sb.Append("\n");
                sb.Append("\"");
                int start = fieldName.IndexOf('<');
                int len = fieldName.LastIndexOf('>');
                if (start != -1 && len > 0)
                {
                    sb.Append(fieldName.Substring(start+1, len-1));
                }
                else
                {
                    sb.Append(fieldName);
                }
                sb.Append("\": ");
                sb.Append(field.GetValue());
            }
            Utility.Logging.Log(sb.ToString());
        }
    }
}