#pragma mark -
#pragma mark PickerView Data Source

- (NSInteger)numberOfComponentsInPickerView:
(UIPickerView *)pickerView
{
    return 2;
}

- (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component
{
    if (component == 0)  {
        return [_convertFrom count];
    }
    return [_convertTo count];
}


- (NSString *) pickerView: (UIPickerView *)pickerView
              titleForRow:(NSInteger)row
             forComponent:(NSInteger)component
{
    if (component == 0) {
        return [_convertFrom objectAtIndex:row];
    }
    return [_convertTo objectAtIndex:row];
    
}

#pragma mark -
#pragma mark PickerView Delegate

-(void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component

{
    
    [self updateConversionLabel]; 
}


- (void)updateConversionLabel
{
    double convertFrom = [[_convertRates objectAtIndex:[picker selectedRowInComponent:0]] doubleValue];
    
    double convertTo = [[_convertRates objectAtIndex:[picker selectedRowInComponent:1]] doubleValue];
    
    NSNumberFormatter *fmt = [NSNumberFormatter new];
    double input = [fmt numberFromString:inputText.text].doubleValue;
    
    double to = convertTo;
    double from = convertFrom;
    
    double convertValue = input;
    double relative = to / from;
    double result = relative * convertValue;
    
    NSString *convertFromName = [_convertFrom objectAtIndex:[picker selectedRowInComponent:0]];
    NSString *convertToName = [_convertFrom objectAtIndex:[picker selectedRowInComponent:1]];
    
    
    NSNumber *inputNumber = [[NSNumber alloc ]initWithDouble:convertValue];
    NSNumber *resultNumber = [[NSNumber alloc]initWithDouble:result];
    
    
    NSNumberFormatter *formatterResult = [[NSNumberFormatter alloc] init];
    formatterResult.numberStyle = NSNumberFormatterDecimalStyle;
    NSNumberFormatter *formatterInput = [[NSNumberFormatter alloc] init];
    formatterInput.numberStyle = NSNumberFormatterDecimalStyle;
    
    [formatterResult setNumberStyle:NSNumberFormatterDecimalStyle];
    [formatterResult setMaximumFractionDigits:6];
    
    [formatterInput setNumberStyle:NSNumberFormatterDecimalStyle];
    [formatterInput setMaximumFractionDigits:6];
    
    
    
    NSString *formattedResultString = [formatterResult stringFromNumber:(NSNumber*)resultNumber];
    NSString *formattedInputString = [formatterInput stringFromNumber:(NSNumber*)inputNumber];
    

    
    
    
    
    NSString *formelString = [[NSString alloc]initWithFormat:
                              @" %@ %@ =", formattedInputString, convertFromName];
    
    formelLabel.text = formelString;

    
    NSString *resultString = [[NSString alloc]initWithFormat:
                              @" %@ %@",formattedResultString, convertToName];
    
    resultLabel.text = resultString;
   
    
}