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

namespace Multiplayer
{

    public class ClientManager : MonoBehaviour
    {

        #region Inspector Variables
        [Header("Client Settings")]
        [Tooltip("Address server is hosted on")]
        [SerializeField]
        private string ServerAddress = "127.0.0.1";
        [Tooltip("Port to connect to server on")]
        [SerializeField]
        private int Port = 4444;
        [Tooltip("Connects client to server on awake")]
        [SerializeField]
        private bool ConnectOnStart = false;
        #endregion

        //Returns if client is current connected to a server
        public bool IsConnected { get; private set; }

        //UNET client class which connects to the server;
        private NetworkClient uNetClient;

        /// <summary>
        /// Call to connect client to host
        /// </summary>
        [ContextMenu("Start Client")]
        public void StartClient()
        {
            StartClient(ServerAddress, Port);
        }

        /// <summary>
        /// Call to connect the client to the host
        /// </summary>
        /// <param name="ServerAddress">Server Address to connect to</param>
        /// <param name="Port">Port to connect on</param>
        public void StartClient(string ServerAddress, int Port)
        {
            //If client is already connected to don't continue
            if (IsConnected)
            {
                Debug.Log("Client already connected to a server. Client needs to disconnect before it can connect to a server");
                return;
            }

            Debug.Log("Attempting to connect to: '" + ServerAddress + "' on port : '" + Port + "'");

            uNetClient = new NetworkClient();
            RegisterHandlers(uNetClient);

            uNetClient.Configure(ChannelConfig.DefaultTopology());
            uNetClient.Connect(ServerAddress, Port);
        }

        /// <summary>
        /// Helper function which sets up all necessary handlers for message types
        /// </summary>
        /// <param name="client"></param>
        private void RegisterHandlers(NetworkClient client)
        {
            client.RegisterHandler(MsgType.Connect, OnConnected);
            client.RegisterHandler(MsgType.Disconnect, OnDisconnected);
        }


        private void OnConnected(NetworkMessage msg)
        {
            IsConnected = true;
            Debug.Log("Successfully connected to server");
            Debug.Log("Connection ID: " + msg.conn.connectionId);
        }

        private void OnDisconnected(NetworkMessage msg)
        {
            IsConnected = false;
            Debug.Log("Disconnected from Server");
        }

    }
}