using System.Collections;
using System.Collections.Generic;
using UltraCombos;
using UnityEngine;
using UnityEngine.Networking;

// Host Migration
// https://docs.unity3d.com/Manual/UNetHostMigration.html

// Remote Actions
// https://docs.unity3d.com/Manual/UNetActions.html

public class NetworkManagerControl : NetworkManager
{
    public enum NetworkType
    {
        SERVER,
        HOST,
        CLIENT,
        SHADOW
    }

    [Header("Manager Control")]
    public NetworkType networkType;
    
    public bool autoConnect = false;
    public bool netDiscovery = false;
    public bool netMigration = false;
    float connect_stamp = 0.0f;

    bool showGUI = false;
    protected string module = "<color=navy>Network Manager</color>";

    private void Start()
    {
        if (Misc.GetCommandLineArgument("-server"))
        {
            networkType = NetworkType.SERVER;
        }
        else if (Misc.GetCommandLineArgument("-host"))
        {
            networkType = NetworkType.HOST;
        }
        else if (Misc.GetCommandLineArgument("-client"))
        {
            networkType = NetworkType.CLIENT;
        }
        else if (Misc.GetCommandLineArgument("-shadow"))
        {
            networkType = NetworkType.SHADOW;
        }

        string input;
        if (Misc.GetCommandLineArgument("-id", out input))
        {
            int res;
            if (int.TryParse(input, out res))
            {

            }
        }
        if (Misc.GetCommandLineArgument("-address", out input))
        {
            networkAddress = input;
            Misc.Verbose(module, string.Format("-address {0}", input));
        }
        else if (networkType == NetworkType.SERVER || networkType == NetworkType.HOST)
        {
            networkAddress = GetLocalIPAddress();
            Misc.Verbose(module, string.Format("Get Local IP Address: {0}", networkAddress));
        }

        if (netDiscovery)
        {
            var discovery_ctrl = gameObject.AddComponent<NetworkDiscoveryControl>();
            discovery_ctrl.broadcastPort = networkPort + 10000;
            discovery_ctrl.showGUI = false;
            discovery_ctrl.Initialize();
            if (networkType == NetworkType.CLIENT || networkType == NetworkType.SHADOW)
                discovery_ctrl.StartAsClient();
            else if (networkType == NetworkType.SERVER || networkType == NetworkType.HOST)
                discovery_ctrl.StartAsServer();
        }

        var hud = GetComponent<NetworkManagerHUD>();
        if (hud != null)
            hud.showGUI = showGUI;

        var nmmc = GetComponent<NetworkMigrationManager>();
        if (netMigration)
        {
            if (nmmc == null)
                nmmc = gameObject.AddComponent<NetworkMigrationManagerControl>();
        }
        if (nmmc != null)
        {
            nmmc.hostMigration = netMigration;
            nmmc.showGUI = showGUI;
        }

        connect_stamp = -(connectionConfig.ConnectTimeout / 100);
    }

    private void Update()
    {
        if (Input.GetKeyDown(KeyCode.F2))
        {
            showGUI = !showGUI;
            var hud = GetComponent<NetworkManagerHUD>();
            if (hud != null)
                hud.showGUI = showGUI;
            var nmm = GetComponent<NetworkMigrationManager>();
            if (nmm != null)
                nmm.showGUI = showGUI;
        }

        if (isNetworkActive == false && autoConnect)
        {
            float dt = Time.time - connect_stamp;
            if (dt > connectionConfig.ConnectTimeout / 100)
            {
                ResetConnectStamp();
                switch (networkType)
                {
                    case NetworkType.SERVER: StartServer(); break;
                    case NetworkType.HOST: StartHost(); break;
                    case NetworkType.CLIENT: StartClient(); break;
                    case NetworkType.SHADOW: StartClient(); break;
                }
            }
        }
        
        if (NetworkServer.active)
        {
            ServerUpdate();
        }
        else if (NetworkClient.active)
        {
            ClientUpdate();
        }
    }

    protected virtual void ServerUpdate()
    {
        
    }

    protected virtual void ClientUpdate()
    {

    }

    void ResetConnectStamp()
    {
        connect_stamp = Time.time;
    }

    //------------------------------ Start & Stop callbacks -----------------------------------

    // Since there are multiple versions of StartServer, StartClient and StartHost, to reliably customize
    // their functionality, users would need override all the versions. Instead these callbacks are invoked
    // from all versions, so users only need to implement this one case.
    
    public override void OnStartHost()
    {
        Misc.Verbose(module, "OnStartHost");
        networkType = NetworkType.HOST;
        ResetConnectStamp();
    }

    public override void OnStartServer()
    {
        Misc.Verbose(module, "OnStartServer");
        networkType = NetworkType.SERVER;
        ResetConnectStamp();
    }

    public override void OnStartClient(NetworkClient client)
    {
        Misc.Verbose(module, "OnStartClient");
        if (NetworkServer.active)
        {
            networkType = NetworkType.HOST;
        }
        else
        {
            networkType = NetworkType.CLIENT;
        }
        ResetConnectStamp();
    }

    public override void OnStopServer()
    {
        Misc.Verbose(module, "OnStopServer");
        ResetConnectStamp();
    }

    public override void OnStopClient()
    {
        Misc.Verbose(module, "OnStopClient");
        ResetConnectStamp();
    }

    public override void OnStopHost()
    {
        Misc.Verbose(module, "OnStopHost");
        ResetConnectStamp();
    }

    private void OnGUI()
    {
        if (showGUI == false)
            return;

        int xpos = 10;
        int ypos = 10;
        int width = 300;
        int height = 20;
        const int spacing = 24;
        string msg = "";

        msg = string.Format("Network Type: {0}", networkType);
        GUI.Label(new Rect(xpos, ypos, width, height), msg);
        ypos += spacing;

        msg = string.Format("{0}:{1}", networkAddress, networkPort);
        GUI.Label(new Rect(xpos, ypos, width, height), msg);
        ypos += spacing;
                
        if (NetworkServer.active)
        {
            var connections = NetworkServer.connections;
            msg = string.Format("NetworkServer.connections: {0}", connections.Count);
            GUI.Label(new Rect(xpos, ypos, width, height), msg);
            ypos += spacing;

            foreach (var conn in connections)
            {
                if (conn == null)
                {
                    msg = string.Format("\tConn: null");
                }
                else
                {
                    msg = string.Format("\tConn: {0} ({1})", conn.connectionId, conn.address);
                }

                GUI.Label(new Rect(xpos, ypos, width, height), msg);
                ypos += spacing;
            }

            msg = string.Format("NetworkServer.objects: {0}", NetworkServer.objects.Count);
            GUI.Label(new Rect(xpos, ypos, width, height), msg);
            ypos += spacing;
            foreach (var id in NetworkServer.objects.Keys)
            {
                var identity = NetworkServer.objects[id];
                msg = string.Format("\tNetId: {0}", id);
                GUI.Label(new Rect(xpos, ypos, width, height), msg);
                ypos += spacing;
            }
        }
        else if (NetworkClient.active)
        {
            msg = string.Format("ClientScene.objects: {0}", ClientScene.objects.Count);
            GUI.Label(new Rect(xpos, ypos, width, height), msg);
            ypos += spacing;
            foreach (var id in ClientScene.objects.Keys)
            {
                var identity = ClientScene.objects[id];
                msg = string.Format("\tNetId: {0}", id);
                GUI.Label(new Rect(xpos, ypos, width, height), msg);
                ypos += spacing;
            }
        }

        var hud = GetComponent<NetworkManagerHUD>();
        if (hud != null)
            hud.offsetY = ypos;
        else
        {
            var nmm = GetComponent<NetworkMigrationManager>();
            if (nmm != null)
                nmm.offsetY = ypos;
        }
    }

    protected NetworkIdentity GetLocalPlayer()
    {
#if true
        var objects = FindObjectsOfType<NetworkIdentity>();
        foreach (var obj in objects)
        {
            if (obj.isLocalPlayer)
                return obj;
        }
#else
        Dictionary<NetworkInstanceId, NetworkIdentity> objects;
        objects = NetworkServer.active ? NetworkServer.objects : ClientScene.objects;

        foreach (var id in objects.Keys)
        {
            var identity = objects[id];
            if (identity.isLocalPlayer)
                return identity;
        }
#endif
        return null;
    }

    protected string GetLocalIPAddress()
    {
        var host = System.Net.Dns.GetHostEntry(System.Net.Dns.GetHostName());
        foreach (var ip in host.AddressList)
        {
            if (ip.AddressFamily == System.Net.Sockets.AddressFamily.InterNetwork)
            {
                return ip.ToString();
            }
        }
        throw new System.Exception("Local IP Address Not Found!");
    }
}