using System;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
using ArduinoBluetoothAPI;
using DG.Tweening;
/* 蓝牙射击模块 */
public class BluetoothShoot : MonoBehaviour
{
    BluetoothHelper bluetoothHelper;
    BluetoothHelperCharacteristic characteristicWrite;
    BluetoothHelperService bluetoothService;
    string targetDeviceName = "BArrow_202105";
    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 BluetoothShoot ins;

    void Start() {
        ins = this;
        BluetoothDispatcher.shoot = handleDataBytes;
    }

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

    private bool userDoConnect = false;
    private bool doConnect = false;
    public void DoConnect() {
        if (status == BluetoothStatusEnum.Connect) {
            userDoConnect = true;
            doConnect = true;
            SetStatus(BluetoothStatusEnum.Connecting);
        } else if (status == BluetoothStatusEnum.ConnectSuccess) {
            userDoConnect = false;
            doConnect = false;
            OnDisconnect();
            bluetoothHelper.Disconnect();
        }
    }

    void OnDisconnect() {
        hasData = false;
        canConnect = true;
        if (ShootCheck.ins) ShootCheck.ins.canAdjustNormalOrHightMode = false;
        SetStatus(BluetoothStatusEnum.ConnectFail);
        //清除射箭收集的数据
        dataGetting = false;
        dataBytes.Clear();
    }

    void Update()
    {
        if (userDoConnect && status == BluetoothStatusEnum.Connect) {
            DoConnect();
        }
        if (doConnect) Connect();
    }

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

    void Connect()
    {
        if (BluetoothAim.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) =>
            {
                Log("连接失败\n" + helper.getDeviceName());
                OnDisconnect();
            };
            bluetoothHelper.OnCharacteristicChanged += (helper, value, characteristic) =>
            {
                hasData = true;
                byte[] bytes = value;
                // Log(String.Join(",", bytes));
                BluetoothClient.UploadData(1, bytes);
                handleDataBytes(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("5");
        CallDelay(1, delegate() {
            if (ShootCheck.ins)
            {
                ShootCheck.ins.OnBluetoothReady(this);
                Log("射击模块准备完成\n" + deviceName);
            }
        });
        CallDelay(2.5f, delegate() {
            WriteData("B");    
        });
    }

    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;
        }
    }

    //---收集射箭轴加速度---

    bool dataGetting = false;
    int dataGetLen = 0;
    List<byte> dataBytes = new List<byte>();

    int TwoByteToInt(byte b1, byte b2) 
    {
        ushort twoByte = (ushort) (b1 * 256 + b2);
        short shortNum = (short) twoByte;
        return (int) shortNum; 
    }

    void cacheDataBytes(byte[] bytes, int startIndex) {
        for (int i = startIndex; i < bytes.Length; i++) {
            byte b = bytes[i];
            if (dataBytes.Count < dataGetLen) {
                dataBytes.Add(b);
            } else {
                if (ShootCheck.ins)  ShootCheck.ins.OnDataReceived(dataBytes.ToArray());
                dataGetting = false;
                dataBytes.Clear();
                break;
            }
        }
    }

    public void handleDataBytes(byte[] bytes) {
        if (dataGetting) {
            cacheDataBytes(bytes, 0);
        } else {
            if (bytes.Length >= 5) {
                int byte3Value = 0; //轴数据识别，1：x轴，2：y轴，3：z轴
                if (ShootCheck.ins) {
                    CMD cmd = ShootCheck.ins.cmd;
                    if (cmd.a == "x") byte3Value = 1;
                    if (cmd.a == "y") byte3Value = 2;
                    if (cmd.a == "z") byte3Value = 3;
                }
                if (bytes[0] == 255 || bytes[1] == 255 && bytes[2] == byte3Value) {
                    dataGetting = true;
                    dataGetLen = TwoByteToInt(bytes[3], bytes[4]);
                    cacheDataBytes(bytes, 5);
                }
            } else if (bytes.Length == 2) {
                DeviceBatteryView.ins.RenderBattery(2, bytes[0]);
            }
        }
    }
}