using UnityEngine;
using UnityEngine.UI;
using UnityEngine.SceneManagement;
using Mirror;
using System.Collections;
using TMPro;

public class ClientHomeWaittingSceneController : MonoBehaviour
{
    public static ClientHomeWaittingSceneController Instance;

    [Header("UI 元件")]
    public TMP_Text statusText;

    private bool isConnecting = false;
    private bool welcomeReceived = false;

    void Awake()
    {
        Instance = this;
    }

    void Start()
    {
        SetupScene();
        StartCoroutine(ConnectToServer());
    }

    void SetupScene()
    {
        if (ClientGlobalMenuManager.Instance != null)
        {
            ClientGlobalMenuManager.Instance.menuButton.SetActive(true);
        }
        
        if (statusText != null)
        {
            statusText.text = "等待神明的降臨";
        }
    }


    IEnumerator ConnectToServer()
    {
        isConnecting = true;

        if (statusText != null)
        {
            statusText.text = "等待神明的降臨.";
        }

        // 設置 NetworkManager
        if (ClientNetworkManager.Instance != null)
        {
            //ClientNetworkManager.Instance.StopClient();
            ClientNetworkManager.Instance.networkAddress = ClientInitSceneController.ServerAddr;

            // 使用 Telepathy (TCP) Transport
            TelepathyTransport transport = ClientNetworkManager.Instance.GetComponent<TelepathyTransport>();
            if (transport != null)
            {
                transport.port = ClientInitSceneController.ServerPort;
            }

            // 開始連線
            ClientNetworkManager.Instance.StartClient();
            Debug.Log($"開始連線到 {ClientInitSceneController.ServerAddr}:{ClientInitSceneController.ServerPort}");
        }

        // 等待連線
        float timeout = 3f;
        float elapsed = 0f;

        while (!NetworkClient.isConnected && elapsed < timeout)
        {
            elapsed += Time.deltaTime;
            yield return null;
        }

        if (NetworkClient.isConnected)
        {
            Debug.Log("連線成功！等待 Welcome 訊息...");

            if (statusText != null)
            {
                statusText.text = "等待神明的降臨..";
            }

            // send welcome
            if (ClientMessageHandler.Instance != null)
            {
                ClientMessageHandler.Instance.RegisterHandler();
                ClientMessageHandler.Instance.SendMessageToServer("welcome", "hello");
            }

            // 等待 Welcome 訊息
            yield return StartCoroutine(WaitForWelcomeMessage());
        }
        else
        {
            Debug.LogError("連線失敗！");

            if (statusText != null)
            {
                statusText.text = "等待神明的降臨...!";
            }

            isConnecting = false;

            yield return StartCoroutine(ConnectToServer());
        }
    }

    IEnumerator WaitForWelcomeMessage()
    {
        float timeout = 3f;
        float elapsed = 0f;

        while (!welcomeReceived && elapsed < timeout)
        {
            elapsed += Time.deltaTime;
            yield return null;
        }

        if (!welcomeReceived)
        {
            Debug.LogError("未收到 Welcome 訊息！");

            if (statusText != null)
            {
                statusText.text = "等待神明的降臨...!!";
            }

            isConnecting = false;
            yield return StartCoroutine(ConnectToServer());
        }
    }

    public void OnWelcomeMessageReceived()
    {
        welcomeReceived = true;
        Debug.Log("Welcome 訊息已驗證，準備跳轉場景");

        if (statusText != null)
        {
            statusText.text = "等待神明的降臨...";
        }

        StartCoroutine(LoadIntroScene());
    }

    IEnumerator LoadIntroScene()
    {
        yield return new WaitForSeconds(0f);
        SceneManager.LoadScene("ClientIntroScene");
    }
}