using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using ArduinoBluetoothAPI;
using System;
#if UNITY_ANDROID
using UnityEngine.Android;
#endif

public class BLEServicesManager : MonoBehaviour
{
    private BluetoothHelper bluetoothHelper;
    private float timer;
    void Start()
    {

#if UNITY_ANDROID
        var callbacks = new PermissionCallbacks();
        callbacks.PermissionDenied += PermissionCallbacks_PermissionDenied;
        callbacks.PermissionGranted += PermissionCallbacks_PermissionGranted;
        callbacks.PermissionDeniedAndDontAskAgain += PermissionCallbacks_PermissionDeniedAndDontAskAgain;

        if (!Permission.HasUserAuthorizedPermission("android.permission.BLUETOOTH_SCAN") || !Permission.HasUserAuthorizedPermission("android.permission.BLUETOOTH_ADVERTISE") || !Permission.HasUserAuthorizedPermission("android.permission.BLUETOOTH_CONNECT"))
            Permission.RequestUserPermissions(new string[] { "android.permission.BLUETOOTH_SCAN", "android.permission.BLUETOOTH_ADVERTISE", "android.permission.BLUETOOTH_CONNECT" }, callbacks);
#else
    setupBluetooth();
#endif

        timer = 0;
        
    }

    private void OnScanEnded(BluetoothHelper helper, LinkedList<BluetoothDevice> devices){
        Debug.Log("FOund " + devices.Count);
        if(devices.Count == 0){
            bluetoothHelper.ScanNearbyDevices();
            return;
        }

        foreach(var d in devices)
        {
            Debug.Log(d.DeviceName);
        }
            
        try
        {
            bluetoothHelper.setDeviceName("HC-08");
            bluetoothHelper.Connect();
            Debug.Log("Connecting");
        }catch(Exception ex)
        {
            bluetoothHelper.ScanNearbyDevices();
            Debug.Log(ex.Message);
        }

    }

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

    void Update(){
        if(bluetoothHelper == null)
            return;
        if(!bluetoothHelper.isConnected())
            return;
        timer += Time.deltaTime;

        if(timer < 5)
            return;
        timer = 0;
        sendData();
    }

    void sendData(){
        // Debug.Log("Sending");
        // BluetoothHelperCharacteristic ch = new BluetoothHelperCharacteristic("FFE1");
        // ch.setService("FFE0"); //this line is mandatory!!!
        // bluetoothHelper.WriteCharacteristic(ch, new byte[]{0x44, 0x55, 0xff});

        Debug.Log("Sending");
        BluetoothHelperCharacteristic ch = new BluetoothHelperCharacteristic("19B10001-E8F2-537E-4F6C-D104768A1214");
        ch.setService("19B10000-E8F2-537E-4F6C-D104768A1214"); //this line is mandatory!!!
        bluetoothHelper.WriteCharacteristic(ch, "1234");
    }

    void read(){
        BluetoothHelperCharacteristic ch = new BluetoothHelperCharacteristic("2A24");
        ch.setService("180A");//this line is mandatory!!!
        bluetoothHelper.ReadCharacteristic(ch);
    }

    void PermissionCallbacks_PermissionDeniedAndDontAskAgain(string permissionName)
    {
        Debug.Log($"{permissionName} PermissionDeniedAndDontAskAgain");
    }

    void PermissionCallbacks_PermissionDenied(string permissionName)
    {
        Debug.Log($"{permissionName} PermissionCallbacks_PermissionDenied");
    }

    void PermissionCallbacks_PermissionGranted(string permissionName)
    {
        Debug.Log($"{permissionName} PermissionCallbacks_PermissionGranted");

        setupBluetooth();
    }

    void setupBluetooth()
    {
        try
        {
            if (bluetoothHelper != null)
                return;

            Debug.Log("HI");

            BluetoothHelper.BLE = true;  //use Bluetooth Low Energy Technology
            bluetoothHelper = BluetoothHelper.GetInstance();
            bluetoothHelper.OnConnected += (helper) =>
            {
                List<BluetoothHelperService> services = helper.getGattServices();
                foreach (BluetoothHelperService s in services)
                {
                    Debug.Log("Service : " + s.getName());
                    foreach (BluetoothHelperCharacteristic item in s.getCharacteristics())
                    {
                        Debug.Log(item.getName());
                    }
                }

                Debug.Log("Connected");
                BluetoothHelperCharacteristic c = new BluetoothHelperCharacteristic("ffe1");
                c.setService("ffe0");
                bluetoothHelper.Subscribe(c);
                //sendData();
            };
            bluetoothHelper.OnConnectionFailed += (helper) =>
            {
                Debug.Log("Connection failed");
            };
            bluetoothHelper.OnScanEnded += OnScanEnded;
            bluetoothHelper.OnServiceNotFound += (helper, serviceName) =>
            {
                Debug.Log(serviceName);
            };
            bluetoothHelper.OnCharacteristicNotFound += (helper, serviceName, characteristicName) =>
            {
                Debug.Log(characteristicName);
            };
            bluetoothHelper.OnCharacteristicChanged += (helper, value, characteristic) =>
            {
                Debug.Log(characteristic.getName());
                Debug.Log(value[0]);
            };

            // BluetoothHelperService service = new BluetoothHelperService("FFE0");
            // service.addCharacteristic(new BluetoothHelperCharacteristic("FFE1"));
            // BluetoothHelperService service2 = new BluetoothHelperService("180A");
            // service.addCharacteristic(new BluetoothHelperCharacteristic("2A24"));
            // bluetoothHelper.Subscribe(service);
            // bluetoothHelper.Subscribe(service2);
            // bluetoothHelper.ScanNearbyDevices();

            // BluetoothHelperService service = new BluetoothHelperService("19B10000-E8F2-537E-4F6C-D104768A1214");
            // service.addCharacteristic(new BluetoothHelperCharacteristic("19B10001-E8F2-537E-4F6C-D104768A1214"));
            //BluetoothHelperService service2 = new BluetoothHelperService("180A");
            //service.addCharacteristic(new BluetoothHelperCharacteristic("2A24"));
            // bluetoothHelper.Subscribe(service);
            //bluetoothHelper.Subscribe(service2);
            bluetoothHelper.ScanNearbyDevices();

        }
        catch (Exception ex)
        {
            Debug.Log(ex.StackTrace);
        }
    }
}