using ArduinoBluetoothAPI;
using System;
using UnityEngine;
using System.Collections.Generic;
using UnityEngine.UI;
using DG.Tweening;

public class BluetoothAim : MonoBehaviour
{
    BluetoothHelper bluetoothHelper;
    BluetoothHelperCharacteristic characteristicWrite;
    BluetoothHelperService bluetoothService;
    string targetDeviceName = "Bbow_20210501";
    string deviceName = "";
    bool canConnect = true;
    [SerializeField] Text textUI;
    public BluetoothStatusEnum status = BluetoothStatusEnum.Connect;
    public bool hasData = false;
    public static bool scanLock = false; //防止同时扫描冲突
    public static BluetoothAim ins;

    void Start() {
        ins = this;
    }

    void OnDestroy()
    {
        if (bluetoothHelper != null)
        {
            bluetoothHelper.Disconnect();
        }
    }

    private bool doConnect = false;
    public void DoConnect() {
        if (status == BluetoothStatusEnum.Connect) {
            doConnect = true;
            SetStatus(BluetoothStatusEnum.Connecting);
        }
    }
    void Update()
    {
        DoConnect();
        if (doConnect) Connect();
    }

    void SetStatus(BluetoothStatusEnum statusValue) 
    {
        status = statusValue;
        if (status == BluetoothStatusEnum.ConnectFail) {
            Sequence sequence = DOTween.Sequence();
            sequence.AppendInterval(2f);
            sequence.AppendCallback(delegate() {
                if (status == BluetoothStatusEnum.ConnectFail) {
                    status = BluetoothStatusEnum.Connect;        
                }
            });
            sequence.SetUpdate(true);
            DeviceReconnectView.Show();
        }
    }

    void Connect()
    {
        if (BluetoothShoot.scanLock)
        {
            return;
        }
        if (!canConnect)
        {
            return;
        }
        doConnect = false;
        scanLock = true;
        canConnect = false;
        SetStatus(BluetoothStatusEnum.Connecting);
        try
        {
            BluetoothHelper.BLE = true;
            bluetoothHelper = BluetoothHelper.GetNewInstance();

            bluetoothHelper.OnConnected += (BluetoothHelper helper) =>
            {
                Log("连接成功\n" + helper.getDeviceName());
                SetStatus(BluetoothStatusEnum.ConnectSuccess);
                foreach (BluetoothHelperService service in helper.getGattServices())
                {
                
                    if (service.getName().ToLower().StartsWith("0000fff0"))
                    {
                        bluetoothService = service;

                        foreach (BluetoothHelperCharacteristic characteristic in service.getCharacteristics())
                        {
                            if (characteristic.getName().ToLower().StartsWith("0000fff2"))
                            {
                                characteristicWrite = characteristic;
                            }
                            else if (characteristic.getName().ToLower().StartsWith("0000fff1"))
                            {

                                BluetoothHelperCharacteristic ch = new BluetoothHelperCharacteristic(characteristic.getName());
                                ch.setService(bluetoothService.getName());
                                bluetoothHelper.Subscribe(ch);
                            }
                        }
                    }
                }
                CallDelay(1, OpenReceiveData);
            };
            bluetoothHelper.OnConnectionFailed += (BluetoothHelper helper) =>
            {
                hasData = false;
                canConnect = true;
                Log("连接失败\n" + helper.getDeviceName());
                SetStatus(BluetoothStatusEnum.ConnectFail);
            };
            bluetoothHelper.OnCharacteristicChanged += (helper, value, characteristic) =>
            {
                hasData = true;
                byte[] bytes = value;
                // Log(String.Join(",", bytes));
                BluetoothClient.UploadData(0, bytes);
                if (AimHandler.ins)
                {
                    AimHandler.ins.OnDataReceived(bytes);
                }
            };
            bluetoothHelper.OnScanEnded += (BluetoothHelper helper, LinkedList<BluetoothDevice> nearbyDevices) =>
            {
                scanLock = false;
                foreach (BluetoothDevice device in nearbyDevices)
                {
                    if (device.DeviceName == targetDeviceName)
                    {
                        deviceName = device.DeviceName;
                        bluetoothHelper.setDeviceName(deviceName);
                        bluetoothHelper.Connect();
                        Log("发现设备\n" + device.DeviceName);
                        return;
                    }
                }
                canConnect = true;
                Log("没有发现设备");
                SetStatus(BluetoothStatusEnum.ConnectFail);
            };

            bluetoothHelper.ScanNearbyDevices();
            Log("正在扫描设备");
        }
        catch (Exception e)
        {
            Debug.Log(e.Message);
            canConnect = true;
            Log("请打开蓝牙");
        }
    }

    void OpenReceiveData()
    {
        WriteData("3");
        Log("瞄准模块准备完成\n" + deviceName);
    }

    void CallDelay(float delayTime, TweenCallback callback)
    {
        Sequence sequence = DOTween.Sequence();
        sequence.PrependInterval(delayTime).AppendCallback(callback);
        sequence.SetUpdate(true);
    }

    public void WriteData(string data)
    {
        BluetoothHelperCharacteristic ch = new BluetoothHelperCharacteristic(characteristicWrite.getName());
        ch.setService(bluetoothService.getName());
        bluetoothHelper.WriteCharacteristic(ch, data);
    }

    void Log(string text)
    {
        if (textUI) 
        {
            textUI.text = text;
        }
    }
}