using Unity.Netcode;
using UnityEngine;
#if ENABLE_INPUT_SYSTEM
using UnityEngine.InputSystem;
#endif

/// <summary>
/// Dev-only connection harness for local multiplayer testing: Host/Client/Server over loopback via the
/// configured UnityTransport (hotkeys H/C/J, K = Shutdown). Roles are rolled by <see cref="MatchManager"/>
/// at match start, not here. Testing scaffold only - replace with real lobby/menu UI later.
/// </summary>
[RequireComponent(typeof(NetworkManager))]
[DisallowMultipleComponent]
public class NetworkBootstrap : MonoBehaviour
{
    [Tooltip("Draw the on-screen Host/Client panel (top-left).")]
    public bool showGui = true;

    [Tooltip("Allow the H/C/J/K keyboard shortcuts.")]
    public bool enableHotkeys = true;

    private NetworkManager _net;

    private void Awake()
    {
        if (!Application.isEditor)
        {
            Destroy(this);
            return;
        }

        _net = GetComponent<NetworkManager>();
    }

    private void Update()
    {
        if (!enableHotkeys) return;
        if (TypingGuard.IsTyping) return; // don't fire H/C/J/K while typing in a text field
#if ENABLE_INPUT_SYSTEM
        var kb = Keyboard.current;
        if (kb == null || !_net) return;
        if (!_net.IsListening)
        {
            if (kb.hKey.wasPressedThisFrame) _net.StartHost();
            else if (kb.cKey.wasPressedThisFrame) _net.StartClient();
            else if (kb.jKey.wasPressedThisFrame) _net.StartServer();
        }
        else if (kb.kKey.wasPressedThisFrame)
        {
            _net.Shutdown();
        }
#endif
    }

    private void OnGUI()
    {
        if (!showGui || !_net) return;

        GUILayout.BeginArea(new Rect(10, 10, 220, 160), GUI.skin.box);
        if (!_net.IsListening)
        {
            GUILayout.Label("Netcode (dev)");
            if (GUILayout.Button("Host (H)")) _net.StartHost();
            if (GUILayout.Button("Client (C)")) _net.StartClient();
            if (GUILayout.Button("Server (J)")) _net.StartServer();
        }
        else
        {
            string role = _net.IsHost ? "Host" : _net.IsServer ? "Server" : "Client";
            GUILayout.Label($"Role: {role}");
            GUILayout.Label($"ClientId: {_net.LocalClientId}");
            GUILayout.Label($"Clients: {(_net.IsServer ? _net.ConnectedClients.Count : (_net.IsConnectedClient ? 1 : 0))}");
            if (GUILayout.Button("Shutdown (K)")) _net.Shutdown();
        }
        GUILayout.EndArea();
    }
}