using System;

using UnityEngine;
using Unity.Netcode;
using Unity.Netcode.Transports.UTP;

namespace Colosseum.UI
{
    /// <summary>
    /// 네트워크 연결 설정 (Inspector에서 제어)
    /// </summary>
    public class ConnectionUI : MonoBehaviour
    {
        [Header("Connection Settings")]
        [SerializeField] private string ipAddress = "127.0.0.1";
        [SerializeField] private ushort port = 7777;

        [Header("Editor Test")]
        [Tooltip("에디터 Play Mode 진입 시 자동으로 Host를 시작합니다")]
        [SerializeField] private bool autoStartHostInEditor = false;

        [Header("Status (Read Only)")]
        [SerializeField, Tooltip("현재 연결 상태")] private string connectionStatus = "Disconnected";

        private UnityTransport transport;

        private void Awake()
        {
            transport = NetworkManager.Singleton?.GetComponent<UnityTransport>();
        }

        private void Start()
        {
            UpdateTransportSettings();

            #if UNITY_EDITOR
            if (autoStartHostInEditor && NetworkManager.Singleton != null && !NetworkManager.Singleton.IsListening)
            {
                if (IsVirtualProjectClone())
                    StartClient();
                else
                    StartHost();
            }
            #endif
        }

        private void Update()
        {
            UpdateConnectionStatus();
        }

        private void UpdateConnectionStatus()
        {
            if (NetworkManager.Singleton == null)
            {
                connectionStatus = "No NetworkManager";
                return;
            }

            if (NetworkManager.Singleton.IsServer && NetworkManager.Singleton.IsHost)
                connectionStatus = "Host";
            else if (NetworkManager.Singleton.IsServer)
                connectionStatus = "Server";
            else if (NetworkManager.Singleton.IsClient)
                connectionStatus = NetworkManager.Singleton.IsConnectedClient ? "Connected" : "Connecting...";
            else
                connectionStatus = "Disconnected";
        }

        public void StartHost()
        {
            UpdateTransportSettings();
            NetworkManager.Singleton.StartHost();
            Debug.Log("[Network] Started as Host");
        }

        public void StartClient()
        {
            UpdateTransportSettings();
            NetworkManager.Singleton.StartClient();
            Debug.Log($"[Network] Connecting to {ipAddress}:{port}...");
        }

        public void StartServer()
        {
            UpdateTransportSettings();
            NetworkManager.Singleton.StartServer();
            Debug.Log("[Network] Started as Server");
        }

        public void Disconnect()
        {
            if (NetworkManager.Singleton != null)
            {
                NetworkManager.Singleton.Shutdown();
                Debug.Log("[Network] Disconnected");
            }
        }

        private void UpdateTransportSettings()
        {
            if (transport != null)
            {
                transport.SetConnectionData(ipAddress, port);
            }
        }

        private void OnValidate()
        {
            if (Application.isPlaying && transport != null)
            {
                UpdateTransportSettings();
            }
        }

        /// <summary>
        /// MPP 가상 플레이어 복제본 에디터인지 확인합니다.
        /// </summary>
        private static bool IsVirtualProjectClone()
        {
            string[] arguments = Environment.GetCommandLineArgs();
            for (int i = 0; i < arguments.Length; i++)
            {
                if (string.Equals(arguments[i], "--virtual-project-clone", StringComparison.OrdinalIgnoreCase))
                    return true;
            }

            return false;
        }
    }
}