using UnityEngine;
using System.IO.Ports;
using System.Threading;
using System.Collections.Generic;

public class ArduinoInput : MonoBehaviour
{
    [Header("串口设置")]
    public string portName = "COM3";
    public int baudRate = 9600;

    private SerialPort serialPort;
    private Thread readThread;
    private Queue<string> dataQueue =
        new Queue<string>();
    private bool isRunning = false;
    private object queueLock = new object();

    void Start()
    {
        try
        {
            serialPort = new SerialPort(
                portName, baudRate
            );
            serialPort.ReadTimeout = 100;
            serialPort.Open();
            isRunning = true;

            readThread = new Thread(ReadSerial);
            readThread.IsBackground = true;
            readThread.Start();

            Debug.Log("✅ Arduino 连接成功："
                + portName);
        }
        catch (System.Exception e)
        {
            Debug.LogError(
                "❌ Arduino 连接失败：" + e.Message
            );
        }
    }

    void ReadSerial()
    {
        while (isRunning)
        {
            try
            {
                string data = serialPort
                    .ReadLine().Trim();
                lock (queueLock)
                {
                    dataQueue.Enqueue(data);
                }
            }
            catch { }
        }
    }

    void Update()
    {
        lock (queueLock)
        {
            while (dataQueue.Count > 0)
            {
                string data = dataQueue.Dequeue();

                if (data == "RESTART")
                {
                    HandleButton();
                }
            }
        }
    }

    // 供 BoatController 调用
    public void HandleData(string data)
    {
        if (data == "RESTART")
        {
            HandleButton();
        }
    }

    void HandleButton()
    {
        Debug.Log("🔘 按钮按下！" +
            " isOnStartScreen:" +
            StartManager.Instance
                .isOnStartScreen +
            " gameStarted:" +
            StartManager.Instance
                .gameStarted +
            " isTransitioning:" +
            StartManager.Instance
                .isTransitioning
        );

        // 状态1：在开始页面且没有在过渡中
        // → 触发开始游戏
        if (StartManager.Instance != null &&
            StartManager.Instance
                .isOnStartScreen &&
            !StartManager.Instance
                .isTransitioning)
        {
            Debug.Log("✅ 触发开始游戏");
            StartManager.Instance.PressStart();
            return;
        }

        // 状态2：losePanel 显示
        // → 重新开始
        bool losePanelActive =
            GameManager.Instance != null &&
            GameManager.Instance.losePanel
                != null &&
            GameManager.Instance.losePanel
                .activeSelf;

        if (losePanelActive)
        {
            Debug.Log("✅ lose 后重新开始");
            GameManager.Instance.RestartGame();
            return;
        }

        // 状态3：winPanel 显示
        // → 重新开始
        bool winPanelActive =
            GameManager.Instance != null &&
            GameManager.Instance.winPanel
                != null &&
            GameManager.Instance.winPanel
                .activeSelf;

        if (winPanelActive)
        {
            Debug.Log("✅ win 后重新开始");
            GameManager.Instance.RestartGame();
            return;
        }

        Debug.Log("⚠️ 按钮按下但没有匹配状态");
    }

    void OnDestroy()
    {
        isRunning = false;
        readThread?.Join(500);
        if (serialPort != null &&
            serialPort.IsOpen)
            serialPort.Close();
    }
}