using System;
using System.Collections.Generic;
using System.Text;

namespace Shared.Phone.UserCenter
{
#if Android
    public class HdlAndroidBluetoothLogic
    {
        #region ■ 变量声明___________________________

        /// <summary>
        /// 安卓蓝牙的逻辑
        /// </summary>
        private static HdlAndroidBluetoothLogic m_Current = null;
        /// <summary>
        /// 安卓蓝牙的逻辑
        /// </summary>
        public static HdlAndroidBluetoothLogic Current
        {
            get
            {
                if (m_Current == null)
                {
                    m_Current = new HdlAndroidBluetoothLogic();
                }
                return m_Current;
            }
        }

        /// <summary>
        /// 当前蓝牙客户端
        /// </summary>
        private Blufi.Espressif.BlufiClient nowBlufiClient = null;
        /// <summary>
        /// 发送状态(0:发送失败 1:发送成功)
        /// </summary>
        private int sendStatuValue = -1;

        #endregion

        #region ■ 蓝牙扫描___________________________

        /// <summary>
        /// 搜索蓝牙
        /// </summary>
        /// <param name="waitTime">搜索时间(秒)</param>
        /// <param name="FinishEvent">搜索结束的事件</param>
        public void ScanBluetooth(int waitTime, Action<List<BluetoothInfo>> FinishEvent)
        {
            //读取蓝牙权限
            ((BaseActivity)Application.Activity).SetPermission((result1) =>
            {
                if (result1 == false) { return; }
                ((BaseActivity)Application.Activity).SetPermission((result2) =>
                {
                    if (result2 == false) { return; }

                    HdlThreadLogic.Current.RunThread(() =>
                    {
                        this.DoScanBluetooth(waitTime, FinishEvent);
                    });
                }, "android.permission.ACCESS_FINE_LOCATION");

            }, "android.permission.ACCESS_COARSE_LOCATION");
        }

        /// <summary>
        /// 开始搜索蓝牙
        /// </summary>
        /// <param name="waitTime">搜索时间(秒)</param>
        /// <param name="FinishEvent">搜索结束的事件</param>
        private void DoScanBluetooth(int waitTime, Action<List<BluetoothInfo>> FinishEvent)
        {
            ProgressBar.Show();

            var listBluetoothInfo = new List<BluetoothInfo>();

            var adapter = Android.Bluetooth.BluetoothAdapter.DefaultAdapter;
            var scanner = adapter.BluetoothLeScanner;
            if (adapter.IsEnabled == false || scanner == null)
            {
                HdlMessageLogic.Current.ShowMassage(ShowMsgType.Tip, "请打开蓝牙");
                ProgressBar.Close();
                return;
            }
            if (Android.OS.Build.VERSION.SdkInt >= Android.OS.BuildVersionCodes.M)
            {
                var locationManager = (Android.Locations.LocationManager)Application.Activity.GetSystemService(Android.Content.Context.LocationService);
                if (locationManager == null)
                {
                    HdlMessageLogic.Current.ShowMassage(ShowMsgType.Tip, "位置信息(GBS)不可用");
                    ProgressBar.Close();
                    return;
                }
                if (locationManager.IsProviderEnabled("network") == false || locationManager.IsProviderEnabled("gps") == false)
                {
                    HdlMessageLogic.Current.ShowMassage(ShowMsgType.Tip, "位置信息(GBS)不可用");
                    ProgressBar.Close();
                    return;
                }
            }

            var scanCallback = new BluetoothScanCallback();
            scanner.StartScan(null, new Android.Bluetooth.LE.ScanSettings.Builder().SetScanMode(Android.Bluetooth.LE.ScanMode.LowLatency).Build(), scanCallback);

            System.Threading.Thread.Sleep(waitTime * 1000);

            scanner.StopScan(scanCallback);
            adapter.Dispose();

            foreach (var data in scanCallback.listData)
            {
                listBluetoothInfo.Add(data);
            }
            scanCallback.listData.Clear();

            ProgressBar.Close();

            FinishEvent?.Invoke(listBluetoothInfo);
        }

        /// <summary>
        /// 蓝牙的回调对象
        /// </summary>
        private class BluetoothScanCallback : Android.Bluetooth.LE.ScanCallback
        {
            /// <summary>
            /// 蓝牙列表
            /// </summary>
            public List<BluetoothInfo> listData = new List<BluetoothInfo>();
            /// <summary>
            /// 重复检测
            /// </summary>
            private List<string> listCheck = new List<string>();

            /// <summary>
            /// 蓝牙结果接收
            /// </summary>
            /// <param name="listResult"></param>
            public override void OnBatchScanResults(IList<Android.Bluetooth.LE.ScanResult> listResult)
            {
                foreach (var result in listResult)
                {
                    this.AddBluetoothResult(result);
                }
            }

            /// <summary>
            /// 蓝牙结果接收
            /// </summary>
            /// <param name="callbackType"></param>
            /// <param name="result"></param>
            public override void OnScanResult(Android.Bluetooth.LE.ScanCallbackType callbackType, Android.Bluetooth.LE.ScanResult result)
            {
                this.AddBluetoothResult(result);
            }

            /// <summary>
            /// 添加蓝牙缓存
            /// </summary>
            /// <param name="result"></param>
            private void AddBluetoothResult(Android.Bluetooth.LE.ScanResult result)
            {
                var device = result.Device;
                if (device == null || listCheck.Contains(device.Address) == true)
                {
                    return;
                }
                listCheck.Add(device.Address);

                var data = new BluetoothInfo();
                data.Name = device.Name;
                if (data.Name == null) { data.Name = string.Empty; }
                data.Address = device.Address;
                data.Device = device;
                listData.Add(data);
            }
        }

        #endregion

        #region ■ 蓝牙链接___________________________

        /// <summary>
        /// 蓝牙链接(0:失败 1:成功)
        /// </summary>
        /// <param name="bluetooth">需要链接的蓝牙对象</param>
        /// <param name="StatuEvent">0:连接失败 1:连接成功</param>
        public void ContectBluetooth(BluetoothInfo bluetooth, Action<int> StatuEvent)
        {
            try
            {
                this.nowBlufiClient = new Blufi.Espressif.BlufiClient(Application.Activity, bluetooth.Device);

                //一个回调事件
                var callback = new InnerGattCallback();
                callback.ConnectionStateEvent += (div, newState) =>
                {
                    //OnConnectionStateChange
                    if (div == 1)
                    {
                        if (newState == Android.Bluetooth.ProfileState.Connected)
                        {
                            //链接建立成功
                            StatuEvent?.Invoke(1);
                        }
                        else if (newState == Android.Bluetooth.ProfileState.Disconnected)
                        {
                            //关闭链接
                            this.DisContectBluetooth();
                            StatuEvent?.Invoke(0);
                        }
                    }
                    else if (div == -1)
                    {
                        //关闭链接
                        this.DisContectBluetooth();
                        StatuEvent?.Invoke(0);
                    }
                };
                nowBlufiClient.SetGattCallback(callback);

                //另外一个回调事件
                var blufiCall = new BlufiCallbackMain();
                blufiCall.StateEvent += (div) =>
                {
                    //-1:异常 1:正常 2:发送数据成功 3:发送数据失败
                    if (div == -1)
                    {
                        //关闭链接
                        this.DisContectBluetooth();
                        StatuEvent?.Invoke(0);
                    }
                    if (div == 2 || div == 3)
                    {
                        sendStatuValue = div == 2 ? 1 : 0;
                    }
                };
                nowBlufiClient.SetBlufiCallback(blufiCall);
                //执行链接
                nowBlufiClient.Connect();
            }
            catch
            {
                StatuEvent?.Invoke(0);
            }
        }

        /// <summary>
        /// 先这么定义一个空的继承
        /// </summary>
        private class InnerGattCallback : Android.Bluetooth.BluetoothGattCallback
        {
            /// <summary>
            /// 状态事件回调(-1:异常 1:OnConnectionStateChange)
            /// </summary>
            public Action<int,Android.Bluetooth.ProfileState> ConnectionStateEvent = null;
            /// <summary>
            /// 链接状态改变
            /// </summary>
            /// <param name="gatt"></param>
            /// <param name="status"></param>
            /// <param name="newState"></param>
            public override void OnConnectionStateChange(Android.Bluetooth.BluetoothGatt gatt, Android.Bluetooth.GattStatus status, Android.Bluetooth.ProfileState newState)
            {
                if (status == Android.Bluetooth.GattStatus.Success)
                {
                    //回调事件
                    this.ConnectionStateEvent?.Invoke(1, newState);
                }
                else
                {
                    //回调事件
                    this.ConnectionStateEvent?.Invoke(-1, 0);
                }
            }

            /// <summary>
            /// 成功发现设备的services时，调用此方法
            /// </summary>
            /// <param name="gatt"></param>
            /// <param name="status"></param>
            public override void OnServicesDiscovered(Android.Bluetooth.BluetoothGatt gatt, Android.Bluetooth.GattStatus status)
            {
                if (status != Android.Bluetooth.GattStatus.Success)
                {
                    //回调事件
                    this.ConnectionStateEvent?.Invoke(-1, 0);
                }
            }

            /// <summary>
            /// 应该是写入事件吧
            /// </summary>
            /// <param name="gatt"></param>
            /// <param name="characteristic"></param>
            /// <param name="status"></param>
            public override void OnCharacteristicWrite(Android.Bluetooth.BluetoothGatt gatt, Android.Bluetooth.BluetoothGattCharacteristic characteristic, Android.Bluetooth.GattStatus status)
            {
                if (status != Android.Bluetooth.GattStatus.Success)
                {
                    //回调事件
                    this.ConnectionStateEvent?.Invoke(-1, 0);
                }
            }
        }

        /// <summary>
        /// 抄SDK的，我也不知道这个是什么
        /// </summary>
        private class BlufiCallbackMain : Blufi.Espressif.BlufiCallback
        {
            /// <summary>
            /// 状态事件回调(-1:异常 1:正常 2:发送数据成功 3:发送数据失败)
            /// </summary>
            public Action<int> StateEvent = null;

            /// <summary>
            /// 抄SDK的，我也不知道这个是什么
            /// </summary>
            /// <param name="client"></param>
            /// <param name="gatt"></param>
            /// <param name="service"></param>
            /// <param name="writeChar"></param>
            /// <param name="notifyChar"></param>
            public override void OnGattPrepared(Blufi.Espressif.BlufiClient client, Android.Bluetooth.BluetoothGatt gatt, Android.Bluetooth.BluetoothGattService service,
                Android.Bluetooth.BluetoothGattCharacteristic writeChar, Android.Bluetooth.BluetoothGattCharacteristic notifyChar)
            {
                if (service == null || writeChar == null || notifyChar == null)
                {
                    StateEvent?.Invoke(-1);
                    return;
                }

                try
                {
                    int mtu = 128;
                    if ((int)Android.OS.Build.VERSION.SdkInt == 29
                      && Android.OS.Build.Manufacturer.ToLower().StartsWith("samsung") == true)
                    {
                        mtu = 23;
                    }

                    var requestMtu = gatt.RequestMtu(mtu);
                    if (!requestMtu)
                    {
                        //Request mtu failed
                        client.SetPostPackageLengthLimit(20);
                    }
                    StateEvent?.Invoke(1);
                }
                catch
                {
                    StateEvent?.Invoke(-1);
                    return;
                }
            }

            /// <summary>
            /// 手机端发送数据到蓝牙的结果
            /// </summary>
            /// <param name="client"></param>
            /// <param name="status">0:成功 其他都是失败</param>
            /// <param name="data">手机端发送的数据</param>
            public override void OnPostCustomDataResult(Blufi.Espressif.BlufiClient client, int status, byte[] data)
            {
                StateEvent?.Invoke(status == 0 ? 2 : 3);
            }
        }

        #endregion

        #region ■ 蓝牙关闭___________________________

        /// <summary>
        ///  关闭蓝牙链接
        /// </summary>
        public void DisContectBluetooth()
        {
            HdlThreadLogic.Current.RunMain(() =>
            {
                this.nowBlufiClient?.RequestCloseConnection();
                this.nowBlufiClient = null;

                m_Current = null;

            }, ShowErrorMode.NO);
        }

        #endregion

        #region ■ 发送数据___________________________

        /// <summary>
        /// 发送数据给蓝牙
        /// </summary>
        /// <param name="i_data">发送的数据</param>
        /// <param name="waiTime">等待时间(秒),如果设置为0,则只要发送不出现异常,直接判定为成功</param>
        public bool SendData(string i_data, int waiTime = 0)
        {
            if (this.nowBlufiClient == null)
            {
                return false;
            }

            try
            {
                this.sendStatuValue = -1;
                //发送数据
                var byteData = System.Text.Encoding.UTF8.GetBytes(i_data);
                this.nowBlufiClient.PostCustomData(byteData);
                if (waiTime == 0) { return true; }

                waiTime *= 5;
                while (this.sendStatuValue == -1 && waiTime > 0)
                {
                    System.Threading.Thread.Sleep(200);
                    waiTime--;
                }
                return this.sendStatuValue == 1;
            }
            catch { return false; }
        }

        #endregion

        #region ■ 结构体_____________________________

        /// <summary>
        /// 蓝牙返回的信息
        /// </summary>
        public class BluetoothInfo
        {
            /// <summary>
            /// 名字
            /// </summary>
            public string Name = string.Empty;
            /// <summary>
            /// 地址
            /// </summary>
            public string Address = string.Empty;
            /// <summary>
            /// 蓝牙设备
            /// </summary>
            public Android.Bluetooth.BluetoothDevice Device = null;
        }
        #endregion
    }
#endif
}