@interface BePeripheralViewController : UIViewController<CBPeripheralManagerDelegate>

     /*
     Similar to CBC entralManager, Bluetooth devices take a while to open and will enter the delegation method after successful opening
     - (void)peripheralManagerDidUpdateState:(CBPeripheralManager *)peripheral;
     Simulator will never get CBPeripheralManagerStatePoweredOn status
     */
    peripheralManager = [[CBPeripheralManager alloc]initWithDelegate:self queue:nil];

//PeripherManager State Change
- (void)peripheralManagerDidUpdateState:(CBPeripheralManager *)peripheral{
    switch (peripheral.state) {
            //Here you can determine the status of Bluetooth settings. When turned on, you can call the setUp method (custom)
        case CBPeripheralManagerStatePoweredOn:
            NSLog(@"powered on");
            [info setText:[NSString stringWithFormat:@"Device Name%@Already open for use center Connect",LocalNameKey]];
            [self setUp];
            break;
        case CBPeripheralManagerStatePoweredOff:
            NSLog(@"powered off");
            [info setText:@"powered off"];
            break;

        default:
            break;
    }
}

 //Configuring bluetooch's
 -(void)setUp{

        //characteristics field description
        CBUUID *CBUUIDCharacteristicUserDescriptionStringUUID = [CBUUID UUIDWithString:CBUUIDCharacteristicUserDescriptionString];

        /*
         Characteristic that can be notified
         properties: CBCharacteristicPropertyNotify
         permissions CBAttributePermissionsReadable
         */
        CBMutableCharacteristic *notiyCharacteristic = [[CBMutableCharacteristic alloc]initWithType:[CBUUID UUIDWithString:notiyCharacteristicUUID] properties:CBCharacteristicPropertyNotify value:nil permissions:CBAttributePermissionsReadable];

        /*
         Readable and writable characteristics
         properties: CBCharacteristicPropertyWrite | CBCharacteristicPropertyRead
         permissions CBAttributePermissionsReadable | CBAttributePermissionsWriteable
         */
        CBMutableCharacteristic *readwriteCharacteristic = [[CBMutableCharacteristic alloc]initWithType:[CBUUID UUIDWithString:readwriteCharacteristicUUID] properties:CBCharacteristicPropertyWrite | CBCharacteristicPropertyRead value:nil permissions:CBAttributePermissionsReadable | CBAttributePermissionsWriteable];
        //Set description
        CBMutableDescriptor *readwriteCharacteristicDescription1 = [[CBMutableDescriptor alloc]initWithType: CBUUIDCharacteristicUserDescriptionStringUUID value:@"name"];
        [readwriteCharacteristic setDescriptors:@[readwriteCharacteristicDescription1]];


        /*
         Read-only Characteristic
         properties: CBCharacteristicPropertyRead
         permissions CBAttributePermissionsReadable
         */
        CBMutableCharacteristic *readCharacteristic = [[CBMutableCharacteristic alloc]initWithType:[CBUUID UUIDWithString:readCharacteristicUUID] properties:CBCharacteristicPropertyRead value:nil permissions:CBAttributePermissionsReadable];


        //service1 initializes and adds two characteristics
        CBMutableService *service1 = [[CBMutableService alloc]initWithType:[CBUUID UUIDWithString:ServiceUUID1] primary:YES];
        [service1 setCharacteristics:@[notiyCharacteristic,readwriteCharacteristic]];

        //service2 initializes and adds a characteristics
        CBMutableService *service2 = [[CBMutableService alloc]initWithType:[CBUUID UUIDWithString:ServiceUUID2] primary:YES];
        [service2 setCharacteristics:@[readCharacteristic]];

        //Once added, the proxy's - (void)peripheralManager:(CBPeripheralManager *)peripheral didAddService:(CBService *)service error:(NSError *)error is invoked
        [peripheralManager addService:service1];
        [peripheralManager addService:service2];
 }

//perihpheral added service
- (void)peripheralManager:(CBPeripheralManager *)peripheral didAddService:(CBService *)service error:(NSError *)error{
    if (error == nil) {
        serviceNum++;
    }

    //Because we've added two services, we want to add them twice before sending a broadcast
    if (serviceNum==2) {
        //After adding a service, you can notify the outside world that the proxy will be invoked after calling this method
        //(void)peripheralManagerDidStartAdvertising:(CBPeripheralManager *)peripheral error:(NSError *)error
        [peripheralManager startAdvertising:@{
                                              CBAdvertisementDataServiceUUIDsKey : @[[CBUUID UUIDWithString:ServiceUUID1],[CBUUID UUIDWithString:ServiceUUID2]],
                                              CBAdvertisementDataLocalNameKey : LocalNameKey
                                             }
         ];

    }

}

//peripheral starts sending advertising
- (void)peripheralManagerDidStartAdvertising:(CBPeripheralManager *)peripheral error:(NSError *)error{
    NSLog(@"in peripheralManagerDidStartAdvertisiong");
}

//Subscription characteristics
-(void)peripheralManager:(CBPeripheralManager *)peripheral central:(CBCentral *)central didSubscribeToCharacteristic:(CBCharacteristic *)characteristic{
    NSLog(@"Subscribed %@Data",characteristic.UUID);
    //Number of seconds per second to send a current time to the primary device
    timer = [NSTimer scheduledTimerWithTimeInterval:1 target:self selector:@selector(sendData:) userInfo:characteristic  repeats:YES];
}

//Unsubscribe characteristics
-(void)peripheralManager:(CBPeripheralManager *)peripheral central:(CBCentral *)central didUnsubscribeFromCharacteristic:(CBCharacteristic *)characteristic{
    NSLog(@"unsubscribe %@Data",characteristic.UUID);
    //Cancel response
    [timer invalidate];
}

//Send data, seconds of current time
-(BOOL)sendData:(NSTimer *)t {
    CBMutableCharacteristic *characteristic = t.userInfo;
    NSDateFormatter *dft = [[NSDateFormatter alloc]init];
    [dft setDateFormat:@"ss"];
    NSLog(@"%@",[dft stringFromDate:[NSDate date]]);

    //Execute Response Center Notification Data
    return  [peripheralManager updateValue:[[dft stringFromDate:[NSDate date]] dataUsingEncoding:NSUTF8StringEncoding] forCharacteristic:(CBMutableCharacteristic *)characteristic onSubscribedCentrals:nil];

}


//Read characteristics Request
- (void)peripheralManager:(CBPeripheralManager *)peripheral didReceiveReadRequest:(CBATTRequest *)request{
    NSLog(@"didReceiveReadRequest");
    //Determine whether you have permission to read data
    if (request.characteristic.properties & CBCharacteristicPropertyRead) {
        NSData *data = request.characteristic.value;
        [request setValue:data];
        //Successful response to request
        [peripheralManager respondToRequest:request withResult:CBATTErrorSuccess];
    }else{
        [peripheralManager respondToRequest:request withResult:CBATTErrorWriteNotPermitted];
    }
}


//Write characteristics request
- (void)peripheralManager:(CBPeripheralManager *)peripheral didReceiveWriteRequests:(NSArray *)requests{
    NSLog(@"didReceiveWriteRequests");
    CBATTRequest *request = requests[0];

    //Determine whether you have permission to write data
    if (request.characteristic.properties & CBCharacteristicPropertyWrite) {
        //Need to be converted to a CBMutableCharacteristic object to write values
        CBMutableCharacteristic *c =(CBMutableCharacteristic *)request.characteristic;
        c.value = request.value;
        [peripheralManager respondToRequest:request withResult:CBATTErrorSuccess];
    }else{
        [peripheralManager respondToRequest:request withResult:CBATTErrorWriteNotPermitted];
    }


}