using System;
using System.Reflection;
using GameNetworkLayer.Shared;
using GameServer;
using HarmonyLib;
using NetworkFramework.Server;
using Svelto.Context;
using User.Server;

namespace CLre_server.API.MainServer
{
    public class Server
    {
        // static
        
        private static Server _instance = null;

        public static Server Instance
        {
            get
            {
                if (_instance == null) Init();
                return _instance;
            }
        }

        internal static void Init()
        {
            if (_instance == null) _instance = new Server();
        }
        
        // instance events
        public event EventHandler<StartingEventArgs> InitStart
        {
            add => MainGameServer_Constructor_Patch.preConstructor += value;
            remove => MainGameServer_Constructor_Patch.preConstructor -= value;
        }
        
        public event EventHandler<StartedEventArgs> InitComplete
        {
            add => ServerReadyEngine.serverEngineReady += value;
            remove => ServerReadyEngine.serverEngineReady -= value;
        }
        
        public event EventHandler<StartedEventArgs> FrameworkReady
        {
            add => ServerReadyEngine.serverFrameworkReady += value;
            remove => ServerReadyEngine.serverFrameworkReady -= value;
        }
        
        public event EventHandler<StopEventArgs> FrameworkExit
        {
            add => ServerReadyEngine.serverFrameworkDestroyed += value;
            remove => ServerReadyEngine.serverFrameworkDestroyed -= value;
        }
        
        public event EventHandler<StartedEventArgs> Connected
        {
            add => PhotonNetwork_ConnectUsingSettings_Patch.postConnect += value;
            remove => PhotonNetwork_ConnectUsingSettings_Patch.postConnect -= value;
        }
        
        public event EventHandler<PlayerConnectArgs> PlayerConnect
        {
            add => MainGameServer_SetupContainer_Patch.playerConnected += value;
            remove => MainGameServer_SetupContainer_Patch.playerConnected -= value;
        }
        
        public event EventHandler<PlayerConnectArgs> PlayerDisconnect
        {
            add => MainGameServer_SetupContainer_Patch.playerDisconnected += value;
            remove => MainGameServer_SetupContainer_Patch.playerDisconnected -= value;
        }

        // properties
        
        public GameServerSettings GameServerSettings
        {
            get => MainGameServer_SetupMods_Patch._gameServerSettings;

            set
            {
                MainGameServer_SetupMods_Patch._gameServerSettings = value;
                Traverse.Create(MainGameServer_Constructor_Patch.mgs).Field<GameServerSettings>("_gameServerSettings").Value = value;
            }
        }

        public AccountIdServerNode[] Players
        {
            get => _serverDatabaseQueryEngine.GetConnectedAccounts();
        }
        
        // fields
        
        private ServerDatabaseQueryEngine _serverDatabaseQueryEngine;
        private ServerReadyEngine _serverReadyEngine;

        private Server()
        {
            _serverReadyEngine = new ServerReadyEngine();
            _serverDatabaseQueryEngine = new ServerDatabaseQueryEngine();
        }
    }
    
    [HarmonyPatch]
    class MainGameServer_SetupMods_Patch
    {
        internal static GameServerSettings _gameServerSettings;

        [HarmonyPostfix]
        public static void AfterMethodCall(GameServerSettings ____gameServerSettings)
        {
#if DEBUG
            Utility.Logging.MetaLog("Got GameServerSettings");
#endif
            _gameServerSettings = ____gameServerSettings;
        }
        
        [HarmonyTargetMethod]
        public static MethodBase Target()
        {
            return AccessTools.Method("GameServer.GameFramework.MainGameServer:SetupMods");
        }
    }
    
    [HarmonyPatch]
    class MainGameServer_Constructor_Patch
    {

        internal static ICompositionRoot mgs = null;

        internal static event EventHandler<StartingEventArgs> preConstructor;
        
        internal static event EventHandler<StartingEventArgs> postConstructor;

        [HarmonyPrefix]
        public static void BeforeMethodCall()
        {
            if (preConstructor != null) preConstructor(null, default(StartingEventArgs));
        }
        
        [HarmonyPostfix]
        public static void AfterMethodCall(ICompositionRoot __instance)
        {
            mgs = __instance;
            if (postConstructor != null) postConstructor(__instance, default(StartingEventArgs));
        }
        
        [HarmonyTargetMethod]
        public static MethodBase Target()
        {
            return AccessTools.Constructor(AccessTools.TypeByName("GameServer.GameFramework.MainGameServer"));
        }
    }

    [HarmonyPatch(typeof(PhotonNetwork), "ConnectUsingSettings")]
    class PhotonNetwork_ConnectUsingSettings_Patch
    {
        internal static event EventHandler<StartedEventArgs> preConnect;
        
        internal static event EventHandler<StartedEventArgs> postConnect;
        
        [HarmonyPostfix]
        public static void AfterMethodCall(string gameVersion)
        {
            if (postConnect != null) postConnect(null, new StartedEventArgs
            {
                photonVersion = gameVersion,
                photonRegion = PhotonNetwork.CloudRegion,
                worldName = MainGameServer_SetupMods_Patch._gameServerSettings.GetWorldName(),
                gameGuid = MainGameServer_SetupMods_Patch._gameServerSettings.GetGameGuid(),
            });
        }

        [HarmonyPrefix]
        public static void BeforeMethodCall(string gameVersion)
        {
            if (preConnect != null) preConnect(null, new StartedEventArgs
            {
                photonVersion = gameVersion,
                photonRegion = PhotonNetwork.CloudRegion,
                worldName = MainGameServer_SetupMods_Patch._gameServerSettings.GetWorldName(),
                gameGuid = MainGameServer_SetupMods_Patch._gameServerSettings.GetGameGuid(),
            });
        }
    }
    
    [HarmonyPatch(typeof(GameServer.GameFramework.MainGameServer), "SetupContainer")]
    class MainGameServer_SetupContainer_Patch
    {
        internal static event EventHandler<PlayerConnectArgs> playerConnected;
        
        internal static event EventHandler<PlayerConnectArgs> playerDisconnected;

        private static GameServer.GameFramework.MainGameServer mgs = null;

        [HarmonyPostfix]
        public static void AfterMethodCall(GameServer.GameFramework.MainGameServer __instance, ref IPlayerConnectedCallbacks ____playerConnectedCallbacks)
        {
            mgs = __instance;
            ____playerConnectedCallbacks.OnPlayerConnected += OnConnect;
            ____playerConnectedCallbacks.OnPlayerDisconnected += OnDisconnect;
        }

        public static void OnConnect(int playerId)
        {
            Synergy.Clients.RegisterClient(playerId);
            if (playerConnected != null) playerConnected(mgs, new PlayerConnectArgs
            {
                PlayerId = playerId,
            });
        }

        public static void OnDisconnect(int playerId)
        {
            Synergy.Clients.RemoveClient(playerId);
            if (playerDisconnected != null) playerDisconnected(mgs, new PlayerConnectArgs
            {
                PlayerId = playerId,
            });
        }
    }
}