using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
using Mirror;
using Mirror.Discovery;

public class MyNetworkManagerHUD : MonoBehaviour
{
    [SerializeField] private GameObject startButtonsGroup;
    [SerializeField] private GameObject statusLabelsGroup;

    [SerializeField] private Button startHostButton;
    [SerializeField] private Button startServerOnlyButton;
    [SerializeField] private Button startClientButton;

    [SerializeField] private Button mainStopButton;
    [SerializeField] private Text mainStopButtonText;
    [SerializeField] private Button secondaryStopButton;
    [SerializeField] private Text statusText;

    [SerializeField] private InputField inputNetworkAddress;
    [SerializeField] private InputField inputPort;

    // this will check for games to join, if non, start host.
    public bool alwaysAutoStart = false;
    public NetworkDiscovery networkDiscovery;
    readonly Dictionary<long, ServerResponse> discoveredServers = new Dictionary<long, ServerResponse>();
    private TouchScreenKeyboard keyboard;
    private int keyboardStatus = 0;

    private void Start()
    {
        // Init the input field with Network Manager's network address.
        inputNetworkAddress.text = MyRoomManager.singleton.networkAddress;
        GetPort();

        RegisterListeners();

        //RegisterClientEvents();

        CheckWebGLPlayer();

        if (networkDiscovery == null)
        { networkDiscovery = GameObject.FindObjectOfType<NetworkDiscovery>(); }

        if (alwaysAutoStart)
        {
            StartCoroutine(Waiter());
        }
    }

    public IEnumerator Waiter()
    {
        statusText.text = "Discovering servers..";
        discoveredServers.Clear();
        networkDiscovery.StartDiscovery();
        // we have set this as 3.1 seconds, default discovery scan is 3 seconds, allows some time if host and client are started at same time
        yield return new WaitForSeconds(1.1f);
        if (discoveredServers == null || discoveredServers.Count <= 0)
        {
            statusText.text = "No Servers found, starting as Host.";
            yield return new WaitForSeconds(0.1f);
            discoveredServers.Clear();
            // NetworkManager.singleton.onlineScene = SceneManager.GetActiveScene().name;
            MyRoomManager.singleton.StartHost();
            networkDiscovery.AdvertiseServer();
        }
    }

    private void RegisterListeners()
    {
        // Add button listeners. These buttons are already added in the inspector.
        startHostButton.onClick.AddListener(OnClickStartHostButton);
        startServerOnlyButton.onClick.AddListener(OnClickStartServerButton);
        startClientButton.onClick.AddListener(OnClickStartClientButton);
        mainStopButton.onClick.AddListener(OnClickMainStopButton);
        secondaryStopButton.onClick.AddListener(OnClickSecondaryStopButton);

        // Add input field listener to update NetworkManager's Network Address
        // when changed.
        inputNetworkAddress.onValueChanged.AddListener(delegate { OnNetworkAddressChange(); });
        inputPort.onValueChanged.AddListener(delegate { OnPortChange(); });
    }

    // Not working at the moment. Can't register events.
    /*private void RegisterClientEvents()
    {
        NetworkClient.OnConnectedEvent += OnClientConnect;
        NetworkClient.OnDisconnectedEvent += OnClientDisconnect;
    }*/

    private void CheckWebGLPlayer()
    {
        // WebGL can't be host or server.
        if (Application.platform == RuntimePlatform.WebGLPlayer)
        {
            startHostButton.interactable = false;
            startServerOnlyButton.interactable = false;
        }
    }

    private void RefreshHUD()
    {
        if (!NetworkServer.active && !NetworkClient.isConnected)
        {
            StartButtons();
        }
        else
        {
            StatusLabelsAndStopButtons();
        }
    }

    private void StartButtons()
    {
        if (!NetworkClient.active)
        {
            statusLabelsGroup.SetActive(false);
            startButtonsGroup.SetActive(true);
        }
        else
        {
            ShowConnectingStatus();
        }
    }

    private void StatusLabelsAndStopButtons()
    {
        startButtonsGroup.SetActive(false);
        statusLabelsGroup.SetActive(true);

        // Host
        if (NetworkServer.active && NetworkClient.active)
        {
            statusText.text = $"<b>Host</b>: running via {Transport.active}";

            mainStopButtonText.text = "Stop Client";
        }
        // Server only
        else if (NetworkServer.active)
        {
            statusText.text = $"<b>Server</b>: running via {Transport.active}";

            mainStopButtonText.text = "Stop Server";
        }
        // Client only
        else if (NetworkClient.isConnected)
        {
            statusText.text = $"<b>Client</b>: connected to {MyRoomManager.singleton.networkAddress} via {Transport.active}";

            mainStopButtonText.text = "Stop Client";
        }

        // Note secondary button is only used to Stop Host, and is only needed in host mode.
        secondaryStopButton.gameObject.SetActive(NetworkServer.active && NetworkClient.active);
    }

    private void ShowConnectingStatus()
    {
        startButtonsGroup.SetActive(false);
        statusLabelsGroup.SetActive(true);

        secondaryStopButton.gameObject.SetActive(false);

        statusText.text = "Connecting to " + MyRoomManager.singleton.networkAddress + "..";
        mainStopButtonText.text = "Cancel Connection Attempt";
    }

    private void OnClickStartHostButton()
    {
        OnNetworkAddressChange();
        MyRoomManager.singleton.StartHost();
    }

    private void OnClickStartServerButton()
    {
        OnNetworkAddressChange();
        MyRoomManager.singleton.StartServer();
    }

    private void OnClickStartClientButton()
    {
        OnNetworkAddressChange();
        MyRoomManager.singleton.StartClient();
        //ShowConnectingStatus();
    }

    private void OnClickMainStopButton()
    {
        if (NetworkClient.active)
        {
            MyRoomManager.singleton.StopClient();
        }
        else
        {
            MyRoomManager.singleton.StopServer();
        }
    }

    private void OnClickSecondaryStopButton()
    {
        MyRoomManager.singleton.StopHost();
    }

    private void OnNetworkAddressChange()
    {
        MyRoomManager.singleton.networkAddress = inputNetworkAddress.text;
    }

    private void OnPortChange()
    {
        SetPort(inputPort.text);
    }

    private void SetPort(string _port)
    {
        // only show a port field if we have a port transport
        // we can't have "IP:PORT" in the address field since this only
        // works for IPV4:PORT.
        // for IPV6:PORT it would be misleading since IPV6 contains ":":
        // 2001:0db8:0000:0000:0000:ff00:0042:8329
        if (Transport.active is PortTransport portTransport)
        {
            // use TryParse in case someone tries to enter non-numeric characters
            if (ushort.TryParse(_port, out ushort port))
                portTransport.Port = port;
        }
    }

    private void GetPort()
    {
        if (Transport.active is PortTransport portTransport)
        {
            inputPort.text = portTransport.Port.ToString();
        }
    }

    private void Update()
    {
        RefreshHUD();
    }

    /* This does not work because we can't register the handler.
    void OnClientConnect() {}

    private void OnClientDisconnect()
    {
        RefreshHUD();
    }
    */

    // Do a check for the presence of a Network Manager component when
    // you first add this script to a gameobject.
    private void Reset()
    {
#if UNITY_2022_2_OR_NEWER
        if (!FindAnyObjectByType<MyRoomManager>())
            Debug.LogError("This component requires a NetworkManager component to be present in the scene. Please add!");
#else
            // Deprecated in Unity 2023.1
            if (!FindObjectOfType<NetworkManager>())
                Debug.LogError("This component requires a NetworkManager component to be present in the scene. Please add!");
#endif
    }
}