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

public class The2ndScreenInitSceneController : MonoBehaviour
{
    public static The2ndScreenInitSceneController Instance = null;

    public static string role = "";
    public static string serverAddr = "";
    public static string serverPort = "";

    public GameObject panel;
    public TMP_InputField serverAddrInput;
    public TMP_InputField serverPortInput;
    public Button Server2ndButton;
    public Button Client2ndButton;
    public TMP_Text statusText;

    private bool welcomeReceived = false;

    private void Awake()
    {
        Instance = this;
    }

    // Start is called once before the first execution of Update after the MonoBehaviour is created
    void Start()
    {
        serverAddrInput.text = "127.0.0.1";
        serverPortInput.text = "17777";

        Server2ndButton.onClick.AddListener(Server2ndButton_onClick);
        Client2ndButton.onClick.AddListener(Client2ndButton_onClick);
    }

    private void Client2ndButton_onClick()
    {
        panel.SetActive(false);
        role = "The2ndScreenClient";
        serverAddr = serverAddrInput.text;
        serverPort = serverPortInput.text;
        StartCoroutine(ConnectToServer());
    }

    private void Server2ndButton_onClick()
    {
        panel.SetActive(false);
        role = "The2ndScreenServer";
        serverAddr = serverAddrInput.text;
        serverPort = serverPortInput.text;
        StartCoroutine(ConnectToServer());
    }

    public void OnReceivedWelcome()
    {
        welcomeReceived = true; 
    }

    IEnumerator ConnectToServer()
    {
        // 設置 NetworkManager
        if (The2ndScreenNetworkManager.Instance != null)
        {
            The2ndScreenNetworkManager.Instance.networkAddress = The2ndScreenInitSceneController.serverAddr;

            // 使用 Telepathy (TCP) Transport
            TelepathyTransport transport = The2ndScreenNetworkManager.Instance.GetComponent<TelepathyTransport>();
            if (transport != null)
            {
                transport.port = ushort.Parse(The2ndScreenInitSceneController.serverPort);
            }

            // 開始連線
            The2ndScreenNetworkManager.Instance.StartClient();
            statusText.text = $"開始連線到 {The2ndScreenInitSceneController.serverAddr}:{The2ndScreenInitSceneController.serverPort}";
            Debug.Log($"開始連線到 {The2ndScreenInitSceneController.serverAddr}:{The2ndScreenInitSceneController.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...");
            statusText.text = $"連線成功！等待 Welcome 訊息...";

            // send welcome
            if (The2ndScreenMessageHandler.Instance != null)
            {
                //The2ndScreenMessageHandler.Instance.RegisterHandler();

                The2ndScreenMessageHandler.Instance.SendMessageToServer("welcome", The2ndScreenInitSceneController.role);
            }

            // 等待 Welcome 訊息
            yield return StartCoroutine(WaitForWelcomeMessage());
        }
        else
        {
            Debug.LogError("連線失敗！");
            statusText.text = $"連線失敗！";
            panel.SetActive(true);
            //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！");
            statusText.text = $"未收到 Welcome 訊息！";
            panel.SetActive(true);
            //yield return StartCoroutine(ConnectToServer());
        }
        else
        {
            if (The2ndScreenInitSceneController.role == "The2ndScreenServer")
            {
                statusText.text = $"跳到神明第2畫面";
                yield return StartCoroutine(LoadNextScene("The2ndScreenServerScene"));
            } else
            if (The2ndScreenInitSceneController.role == "The2ndScreenClient")
            {
                statusText.text = $"跳到信眾第2畫面";
                yield return StartCoroutine(LoadNextScene("The2ndScreenClientScene"));
            }
        }
    }

    IEnumerator LoadNextScene(string name)
    {
        yield return new WaitForSeconds(0f);

        SceneManager.LoadScene(name);
    }

    // Update is called once per frame
    void Update()
    {
        
    }
}