#import "RCCViewController.h"
#import "RCCNavigationController.h"
#import "RCCTabBarController.h"
#import "RCCDrawerController.h"
#import "RCCTheSideBarManagerViewController.h"
#import <React/RCTRootView.h>
#import "RCCManager.h"
#import "RCTConvert.h"
#import "RCCExternalViewControllerProtocol.h"
#import "RNCubeController.h"
#import "RCTEventDispatcher.h"
#import "UIBarButtonItem+Badge.h"
#import "RCCEventEmitter.h"
#import "UIViewController+NavBarButtons.h"

NSString* const RCCViewControllerCancelReactTouchesNotification = @"RCCViewControllerCancelReactTouchesNotification";

const NSInteger BLUR_STATUS_TAG = 78264801;
const NSInteger BLUR_NAVBAR_TAG = 78264802;
const NSInteger TRANSPARENT_NAVBAR_TAG = 78264803;


@interface RCCViewController() <UIGestureRecognizerDelegate>
@property (nonatomic) BOOL _hidesBottomBarWhenPushed;
@property (nonatomic) BOOL _statusBarHideWithNavBar;
@property (nonatomic) BOOL _statusBarHidden;
@property (nonatomic) BOOL _statusBarTextColorSchemeLight;
@property (nonatomic, strong) NSDictionary *originalNavBarImages;
@property (nonatomic, strong) UIImageView *navBarHairlineImageView;
@property (nonatomic, weak) id <UIGestureRecognizerDelegate> originalInteractivePopGestureDelegate;
@end

@implementation RCCViewController

-(UIImageView *)navBarHairlineImageView {
  if (!_navBarHairlineImageView) {
    _navBarHairlineImageView = [self findHairlineImageViewUnder:self.navigationController.navigationBar];
  }
  return _navBarHairlineImageView;
}

+ (UIViewController*)controllerWithLayout:(NSDictionary *)layout globalProps:(NSDictionary *)globalProps bridge:(RCTBridge *)bridge
{
  UIViewController* controller = nil;
  if (!layout) return nil;
  
  // get props
  if (!layout[@"props"]) return nil;
  if (![layout[@"props"] isKindOfClass:[NSDictionary class]]) return nil;
  NSDictionary *props = layout[@"props"];
  
  // get children
  if (!layout[@"children"]) return nil;
  if (![layout[@"children"] isKindOfClass:[NSArray class]]) return nil;
  NSArray *children = layout[@"children"];
  
  // create according to type
  NSString *type = layout[@"type"];
  if (!type) return nil;
  UIViewController *topController;
  
  // regular view controller
  if ([type isEqualToString:@"ViewControllerIOS"])
  {
    controller = [[RCCViewController alloc] initWithProps:props children:children globalProps:globalProps bridge:bridge];
  }
  
  // tab bar controller
  if ([type isEqualToString:@"TabBarControllerIOS"])
  {
    controller = [[RCCTabBarController alloc] initWithProps:props children:children globalProps:globalProps bridge:bridge];
  }
  
  // cube bar controller
  if ([type isEqualToString:@"CubeBarControllerIOS"])
  {
    controller = [[RNCubeController alloc] initWithProps:props children:children globalProps:globalProps bridge:bridge];
  }
  
  // side menu controller
  if ([type isEqualToString:@"DrawerControllerIOS"])
  {
    NSString *drawerType = props[@"type"];
    
    if ([drawerType isEqualToString:@"TheSideBar"]) {
      
      controller = [[RCCTheSideBarManagerViewController alloc] initWithProps:props children:children globalProps:globalProps bridge:bridge];
    }
    else {
      controller = [[RCCDrawerController alloc] initWithProps:props children:children globalProps:globalProps bridge:bridge];
    }
  }
  topController = controller;
  // navigation controller
  if ([type isEqualToString:@"NavigationControllerIOS"])
  {
    controller = [[RCCNavigationController alloc] initWithProps:props children:children globalProps:globalProps bridge:bridge];
    topController = [((RCCNavigationController *)controller) topViewController];
  }
  [controller setParentStyle:props[@"style"]];
  

  NSString *title = props[@"title"];
  if (title){
    topController.title = title;
  }
  [topController setTitleImage:props[@"titleImage"]];
  
  NSArray *leftButtons = props[@"leftButtons"];
  if (leftButtons)
  {
    [topController setButtons:leftButtons side:@"left" animated:NO];
  }
  
  NSArray *rightButtons = props[@"rightButtons"];
  if (rightButtons)
  {
    [topController setButtons:rightButtons side:@"right" animated:NO];
  }
  
  
  NSString *backButtonTitle = props[@"backButtonTitle"];
  if (backButtonTitle)
  {
    UIBarButtonItem *backItem = [[UIBarButtonItem alloc] initWithTitle:backButtonTitle
                                                                 style:UIBarButtonItemStylePlain
                                                                target:nil
                                                                action:nil];
    
    topController.navigationItem.backBarButtonItem = backItem;
  }
  else
  {
    topController.navigationItem.backBarButtonItem = nil;
  }
  
  NSNumber *backButtonHidden = props[@"backButtonHidden"];
  BOOL backButtonHiddenBool = backButtonHidden ? [backButtonHidden boolValue] : NO;
  if (backButtonHiddenBool)
  {
    topController.navigationItem.hidesBackButton = YES;
  }
  
  
  // register the controller if we have an id
  NSString *componentId = props[@"id"];
  if (controller && componentId)
  {
    [[RCCManager sharedInstance] registerController:controller componentId:componentId componentType:type];
  }
  
  return controller;
}

- (instancetype)initWithProps:(NSDictionary *)props children:(NSArray *)children globalProps:(NSDictionary *)globalProps bridge:(RCTBridge *)bridge
{
  if (props[@"id"]){
    self.navigatorID = props[@"id"];
  }
  
  if (props[@"key"]){
    self.navigatorID = props[@"key"];
  }
  
  NSString *component = props[@"component"];
  if (!component) return nil;
  
  NSDictionary *passProps = props[@"passProps"];
  NSDictionary *navigatorStyle = props[@"style"];
  
  NSMutableDictionary *mergedProps = [NSMutableDictionary dictionaryWithDictionary:globalProps];
  [mergedProps addEntriesFromDictionary:passProps];
  
  RCTRootView *reactView = [[RCTRootView alloc] initWithBridge:bridge moduleName:component initialProperties:mergedProps];
  if (!reactView) return nil;
  
  self = [super init];
  if (!self) return nil;
  
  [self commonInit:reactView navigatorStyle:navigatorStyle props:props];
  return self;
}

- (instancetype)initWithComponent:(NSString *)component passProps:(NSDictionary *)passProps navigatorStyle:(NSDictionary*)navigatorStyle globalProps:(NSDictionary *)globalProps bridge:(RCTBridge *)bridge
{
  NSMutableDictionary *mergedProps = [NSMutableDictionary dictionaryWithDictionary:globalProps];
  [mergedProps addEntriesFromDictionary:passProps];
  
  RCTRootView *reactView = [[RCTRootView alloc] initWithBridge:bridge moduleName:component initialProperties:mergedProps];
  if (!reactView) return nil;
  
  self = [super init];
  if (!self) return nil;
  
  [self commonInit:reactView navigatorStyle:navigatorStyle props:passProps];
  
  return self;
}

- (void)commonInit:(RCTRootView*)reactView navigatorStyle:(NSDictionary*)navigatorStyle props:(NSDictionary*)props
{
  self.view = reactView;
  self.edgesForExtendedLayout = UIRectEdgeNone; // default
  self.automaticallyAdjustsScrollViewInsets = NO; // default
  
  self.navigatorStyle = [NSMutableDictionary dictionaryWithDictionary:navigatorStyle];
  
  [self setStyleOnInit];
  
  [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(onRNReload) name:RCTJavaScriptDidLoadNotification object:nil];
  [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(onCancelReactTouches) name:RCCViewControllerCancelReactTouchesNotification object:nil];
  
  // In order to support 3rd party native ViewControllers, we support passing a class name as a prop mamed `ExternalNativeScreenClass`
  // In this case, we create an instance and add it as a child ViewController which preserves the VC lifecycle.
  // In case some props are necessary in the native ViewController, the ExternalNativeScreenProps can be used to pass them
  [self addExternalVCIfNecessary:props];
}

- (void)dealloc
{
  [[NSNotificationCenter defaultCenter] removeObserver:self];
  self.view = nil;
}

-(void)onRNReload
{
    [[NSNotificationCenter defaultCenter] removeObserver:self];
    self.view = nil;
}

-(void)onCancelReactTouches
{
  if ([self.view isKindOfClass:[RCTRootView class]]){
    [(RCTRootView*)self.view cancelTouches];
  }
}

- (void)viewWillAppear:(BOOL)animated
{
  if (self.navigatorID) {
    [[RCCEventEmitter sharedInstance] willFocus:self.navigatorID];
  }
  
  
  [super viewWillAppear:animated];
  
  [self setStyleOnAppear];
}

- (void)viewDidAppear:(BOOL)animated
{
  // If we're intercepting the back button to perform some kind of action then we don't want users to be able to swipe back
//  if ([self.navigationController respondsToSelector:@selector(interactivePopGestureRecognizer)]) {
//    self.navigationController.interactivePopGestureRecognizer.enabled = !self.shouldInterceptBackButton;
//  }
  
  if (self.navigatorID) {
    [[RCCEventEmitter sharedInstance] didFocus:self.navigatorID];
  }
  
  [super viewDidAppear:animated];
}

- (void)viewWillDisappear:(BOOL)animated
{
  [super viewWillDisappear:animated];
  
    if (self.isMovingFromParentViewController) {
      dispatch_async(dispatch_get_main_queue(), ^{
        if (!self.popAction) {
            [self onPop];
        }
      });
    }
  
}

// most styles should be set here since when we pop a view controller that changed them
// we want to reset the style to what we expect (so we need to reset on every willAppear)
- (void)setStyleOnAppear
{
  [self setStyleOnAppearForViewController:self];
}

-(void)setStyleOnAppearForViewController:(UIViewController*)viewController
{
  viewController.navigationController.navigationBar.userInteractionEnabled = YES;
  
  NSString *backgroundColor = self.navigatorStyle[@"backgroundColor"];
  if (backgroundColor)
  {
    UIColor *color = backgroundColor != (id)[NSNull null] ? [RCTConvert UIColor:backgroundColor] : nil;
    viewController.view.backgroundColor = color;
  }
  NSString *navBarBackgroundColor = self.navigatorStyle[@"navBarBackgroundColor"];
  if (navBarBackgroundColor)
  {
    UIColor *color = navBarBackgroundColor != (id)[NSNull null] ? [RCTConvert UIColor:navBarBackgroundColor] : nil;
    viewController.navigationController.navigationBar.barTintColor = color;
  }
  else
  {
    viewController.navigationController.navigationBar.barTintColor = nil;
  }
  NSDictionary *backButtonImage = self.navigatorStyle[@"backButtonImage"];
  if (backButtonImage)
  {
    UIBarButtonItem *backItem = [[UIBarButtonItem alloc] initWithTitle:@"" style:UIBarButtonItemStylePlain target:nil action:nil];
    
    viewController.navigationItem.backBarButtonItem = backItem;
    [UINavigationBar appearance].backIndicatorImage = [RCTConvert UIImage:backButtonImage];
    [UINavigationBar appearance].backIndicatorTransitionMaskImage = [RCTConvert UIImage:backButtonImage];
  }
  else
  {
    viewController.navigationItem.backBarButtonItem = nil;
  }
  
  NSString *navBarTextColor = self.navigatorStyle[@"navBarTextColor"];
  NSString *navBarFontFamily = self.navigatorStyle[@"navBarFontFamily"];
  float navBarFontSize = [self.navigatorStyle[@"navBarFontSize"] floatValue];
  if (navBarTextColor || navBarFontFamily)
  {
    NSMutableDictionary *attributes = [NSMutableDictionary dictionaryWithDictionary: [[UINavigationBar appearance] titleTextAttributes]];
    if (navBarTextColor)
    {
      UIColor *color = navBarTextColor != (id)[NSNull null] ? [RCTConvert UIColor:navBarTextColor] : nil;
      [attributes setValue:color forKey:NSForegroundColorAttributeName];
    }
    
    if (navBarFontFamily)
    {
      if (!navBarFontSize)
      {
        navBarFontSize = 17.0f;
      }
      UIFont *font = [UIFont fontWithName:navBarFontFamily size:navBarFontSize];
      [attributes setValue:font forKey:NSFontAttributeName];
    }
    
    [self.navigationController.navigationBar setTitleTextAttributes:attributes];
//    [[UIBarButtonItem appearance] setTitleTextAttributes:attributes forState:UIControlStateNormal];
  }
  else
  {
    [self.navigationController.navigationBar setTitleTextAttributes:nil];
  }
  
  NSString *navBarButtonColor = self.navigatorStyle[@"navBarButtonColor"];
  if (navBarButtonColor)
  {
    UIColor *color = navBarButtonColor != (id)[NSNull null] ? [RCTConvert UIColor:navBarButtonColor] : nil;
    viewController.navigationController.navigationBar.tintColor = color;
  }
  else
  {
    viewController.navigationController.navigationBar.tintColor = nil;
  }
  
  NSString *statusBarTextColorScheme = self.navigatorStyle[@"statusBarTextColorScheme"];
  if (statusBarTextColorScheme && [statusBarTextColorScheme isEqualToString:@"light"])
  {
    viewController.navigationController.navigationBar.barStyle = UIBarStyleBlack;
    self._statusBarTextColorSchemeLight = YES;
  }
  else
  {
    viewController.navigationController.navigationBar.barStyle = UIBarStyleDefault;
    self._statusBarTextColorSchemeLight = NO;
  }
  
  NSNumber *navBarHidden = self.navigatorStyle[@"navBarHidden"];
  BOOL navBarHiddenBool = navBarHidden ? [navBarHidden boolValue] : NO;
  if (viewController.navigationController.navigationBarHidden != navBarHiddenBool)
  {
    [viewController.navigationController setNavigationBarHidden:navBarHiddenBool animated:YES];
  }
  
  NSNumber *navBarHideOnScroll = self.navigatorStyle[@"navBarHideOnScroll"];
  BOOL navBarHideOnScrollBool = navBarHideOnScroll ? [navBarHideOnScroll boolValue] : NO;
  if ([viewController.navigationController respondsToSelector:@selector(hidesBarsOnSwipe)])
  {
    if (navBarHideOnScrollBool)
    {
      viewController.navigationController.hidesBarsOnSwipe = YES;
    }
    else
    {
      viewController.navigationController.hidesBarsOnSwipe = NO;
    }
  }
  
  NSNumber *statusBarBlur = self.navigatorStyle[@"statusBarBlur"];
  BOOL statusBarBlurBool = statusBarBlur ? [statusBarBlur boolValue] : NO;
  if (statusBarBlurBool && [UIBlurEffect class])
  {
    if (![viewController.view viewWithTag:BLUR_STATUS_TAG])
    {
      UIVisualEffectView *blur = [[UIVisualEffectView alloc] initWithEffect:[UIBlurEffect effectWithStyle:UIBlurEffectStyleLight]];
      blur.frame = [[UIApplication sharedApplication] statusBarFrame];
      blur.tag = BLUR_STATUS_TAG;
      [viewController.view addSubview:blur];
    }
  }
  
  NSNumber *navBarBlur = self.navigatorStyle[@"navBarBlur"];
  BOOL navBarBlurBool = navBarBlur ? [navBarBlur boolValue] : NO;
  
  if (navBarBlurBool && [UIBlurEffect class])
  {
    if (![viewController.navigationController.navigationBar viewWithTag:BLUR_NAVBAR_TAG])
    {
      [self storeOriginalNavBarImages];
      
      [self.navigationController.navigationBar setBackgroundImage:[UIImage new] forBarMetrics:UIBarMetricsDefault];
      self.navigationController.navigationBar.shadowImage = [UIImage new];
      UIVisualEffectView *blur = [[UIVisualEffectView alloc] initWithEffect:[UIBlurEffect effectWithStyle:UIBlurEffectStyleLight]];
      CGRect statusBarFrame = [[UIApplication sharedApplication] statusBarFrame];
      blur.frame = CGRectMake(0, -1 * statusBarFrame.size.height, self.navigationController.navigationBar.frame.size.width, self.navigationController.navigationBar.frame.size.height + statusBarFrame.size.height);
      blur.userInteractionEnabled = NO;
      blur.tag = BLUR_NAVBAR_TAG;
      [self.navigationController.navigationBar insertSubview:blur atIndex:0];
    }
  }
  else
  {
    UIView *blur = [viewController.navigationController.navigationBar viewWithTag:BLUR_NAVBAR_TAG];
    if (blur)
    {
      [blur removeFromSuperview];
      [viewController.navigationController.navigationBar setBackgroundImage:self.originalNavBarImages[@"bgImage"] forBarMetrics:UIBarMetricsDefault];
      viewController.navigationController.navigationBar.shadowImage = self.originalNavBarImages[@"shadowImage"];
      self.originalNavBarImages = nil;
    }
  }
  
  NSNumber *navBarTransparent = self.navigatorStyle[@"navBarTransparent"];
  BOOL navBarTransparentBool = navBarTransparent ? [navBarTransparent boolValue] : NO;
  if (navBarTransparentBool)
  {
    if (![viewController.navigationController.navigationBar viewWithTag:TRANSPARENT_NAVBAR_TAG])
    {
      [self storeOriginalNavBarImages];
      
      [viewController.navigationController.navigationBar setBackgroundImage:[UIImage new] forBarMetrics:UIBarMetricsDefault];
      viewController.navigationController.navigationBar.shadowImage = [UIImage new];
      UIView *transparentView = [[UIView alloc] initWithFrame:CGRectZero];
      transparentView.tag = TRANSPARENT_NAVBAR_TAG;
      [viewController.navigationController.navigationBar insertSubview:transparentView atIndex:0];
    }
  }
  else
  {
    UIView *transparentView = [viewController.navigationController.navigationBar viewWithTag:TRANSPARENT_NAVBAR_TAG];
    if (transparentView)
    {
      [transparentView removeFromSuperview];
      [viewController.navigationController.navigationBar setBackgroundImage:self.originalNavBarImages[@"bgImage"] forBarMetrics:UIBarMetricsDefault];
      viewController.navigationController.navigationBar.shadowImage = self.originalNavBarImages[@"shadowImage"];
      self.originalNavBarImages = nil;
    }
  }
  
  NSNumber *navBarTranslucent = self.navigatorStyle[@"navBarTranslucent"];
  BOOL navBarTranslucentBool = navBarTranslucent ? [navBarTranslucent boolValue] : NO;
  if (navBarTranslucentBool || navBarBlurBool)
  {
    viewController.navigationController.navigationBar.translucent = YES;
  }
  else
  {
    viewController.navigationController.navigationBar.translucent = NO;
  }
  
  NSNumber *drawUnderNavBar = self.navigatorStyle[@"drawUnderNavBar"];
  BOOL drawUnderNavBarBool = drawUnderNavBar ? [drawUnderNavBar boolValue] : NO;
  if (drawUnderNavBarBool)
  {
    viewController.edgesForExtendedLayout |= UIRectEdgeTop;
  }
  else
  {
    viewController.edgesForExtendedLayout &= ~UIRectEdgeTop;
  }
  
  NSNumber *drawUnderTabBar = self.navigatorStyle[@"drawUnderTabBar"];
  BOOL drawUnderTabBarBool = drawUnderTabBar ? [drawUnderTabBar boolValue] : NO;
  if (drawUnderTabBarBool)
  {
    viewController.edgesForExtendedLayout |= UIRectEdgeBottom;
  }
  else
  {
    viewController.edgesForExtendedLayout &= ~UIRectEdgeBottom;
  }
  
  NSNumber *removeNavBarBorder = self.navigatorStyle[@"navBarNoBorder"];
  BOOL removeNavBarBorderBool = removeNavBarBorder ? [removeNavBarBorder boolValue] : NO;
  if(removeNavBarBorderBool)
  {
    self.navBarHairlineImageView.hidden = YES;
  }
  else
  {
    self.navBarHairlineImageView.hidden = NO;
  }
  
  //Bug fix: in case there is a interactivePopGestureRecognizer, it prevents react-native from getting touch events on the left screen area that the gesture handles
  //overriding the delegate of the gesture prevents this from happening while keeping the gesture intact (another option was to disable it completely by demand)
  self.originalInteractivePopGestureDelegate = nil;
  if (self.navigationController != nil && self.navigationController.interactivePopGestureRecognizer != nil)
  {
    id <UIGestureRecognizerDelegate> interactivePopGestureRecognizer = self.navigationController.interactivePopGestureRecognizer.delegate;
    if (interactivePopGestureRecognizer != nil)
    {
      self.originalInteractivePopGestureDelegate = interactivePopGestureRecognizer;
      self.navigationController.interactivePopGestureRecognizer.delegate = self;
    }
  }
  
}

-(void)storeOriginalNavBarImages {
  NSMutableDictionary *originalNavBarImages = [@{} mutableCopy];
  UIImage *bgImage = [self.navigationController.navigationBar backgroundImageForBarMetrics:UIBarMetricsDefault];
  if (bgImage != nil)
  {
    originalNavBarImages[@"bgImage"] = bgImage;
  }
  UIImage *shadowImage = self.navigationController.navigationBar.shadowImage;
  if (shadowImage != nil)
  {
    originalNavBarImages[@"shadowImage"] = shadowImage;
  }
  self.originalNavBarImages = originalNavBarImages;
  
}

-(void)setStyleOnDisappear
{
  //self.navBarHairlineImageView.hidden = NO;
  
  if (self.navigationController != nil && self.navigationController.interactivePopGestureRecognizer != nil && self.originalInteractivePopGestureDelegate != nil)
  {
    self.navigationController.interactivePopGestureRecognizer.delegate = self.originalInteractivePopGestureDelegate;
    self.originalInteractivePopGestureDelegate = nil;
  }
}

// only styles that can't be set on willAppear should be set here
- (void)setStyleOnInit
{
  NSNumber *tabBarHidden = self.navigatorStyle[@"tabBarHidden"];
  BOOL tabBarHiddenBool = tabBarHidden ? [tabBarHidden boolValue] : NO;
  if (tabBarHiddenBool)
  {
    self._hidesBottomBarWhenPushed = YES;
  }
  else
  {
    self._hidesBottomBarWhenPushed = NO;
  }
  
  NSNumber *statusBarHideWithNavBar = self.navigatorStyle[@"statusBarHideWithNavBar"];
  BOOL statusBarHideWithNavBarBool = statusBarHideWithNavBar ? [statusBarHideWithNavBar boolValue] : NO;
  if (statusBarHideWithNavBarBool)
  {
    self._statusBarHideWithNavBar = YES;
  }
  else
  {
    self._statusBarHideWithNavBar = NO;
  }
  
  NSNumber *statusBarHidden = self.navigatorStyle[@"statusBarHidden"];
  BOOL statusBarHiddenBool = statusBarHidden ? [statusBarHidden boolValue] : NO;
  if (statusBarHiddenBool)
  {
    self._statusBarHidden = YES;
  }
  else
  {
    self._statusBarHidden = NO;
  }
}

- (BOOL)hidesBottomBarWhenPushed
{
  if (!self._hidesBottomBarWhenPushed) return NO;
  return (self.navigationController.topViewController == self);
}

- (BOOL)prefersStatusBarHidden
{
  if (self._statusBarHidden)
  {
    return YES;
  }
  if (self._statusBarHideWithNavBar)
  {
    return self.navigationController.isNavigationBarHidden;
  }
  else
  {
    return NO;
  }
}

- (void)setNavBarVisibilityChange:(BOOL)animated {
  [self.navigationController setNavigationBarHidden:[self.navigatorStyle[@"navBarHidden"] boolValue] animated:animated];
}


- (UIStatusBarStyle)preferredStatusBarStyle
{
  if (self._statusBarTextColorSchemeLight)
  {
    return UIStatusBarStyleLightContent;
  }
  else
  {
    return UIStatusBarStyleDefault;
  }
}

- (UIImageView *)findHairlineImageViewUnder:(UIView *)view {
  if ([view isKindOfClass:UIImageView.class] && view.bounds.size.height <= 1.0) {
    return (UIImageView *)view;
  }
  for (UIView *subview in view.subviews) {
    UIImageView *imageView = [self findHairlineImageViewUnder:subview];
    if (imageView) {
      return imageView;
    }
  }
  return nil;
}

-(void)addExternalVCIfNecessary:(NSDictionary*)props
{
  NSString *externalScreenClass = props[@"externalNativeScreenClass"];
  if (externalScreenClass != nil)
  {
    Class class = NSClassFromString(externalScreenClass);
    if (class != NULL)
    {
      id obj = [[class alloc] init];
      if (obj != nil && [obj isKindOfClass:[UIViewController class]] && [obj conformsToProtocol:@protocol(RCCExternalViewControllerProtocol)])
      {
        ((id <RCCExternalViewControllerProtocol>)obj).controllerDelegate = self;
        [obj setProps:props[@"externalNativeScreenProps"]];
        
        UIViewController *viewController = (UIViewController*)obj;
        [self addChildViewController:viewController];
        viewController.view.frame = self.view.bounds;
        [self.view addSubview:viewController.view];
        [viewController didMoveToParentViewController:self];
      }
      else
      {
        NSLog(@"addExternalVCIfNecessary: could not create instance. Make sure that your class is a UIViewController whihc confirms to RCCExternalViewControllerProtocol");
      }
    }
    else
    {
      NSLog(@"addExternalVCIfNecessary: could not create class from string. Check that the proper class name wass passed in ExternalNativeScreenClass");
    }
  }
}

#pragma mark - NewRelic

- (NSString*) customNewRelicInteractionName
{
  NSString *interactionName = nil;
  
  if (self.view != nil && [self.view isKindOfClass:[RCTRootView class]])
  {
    NSString *moduleName = ((RCTRootView*)self.view).moduleName;
    if(moduleName != nil)
    {
      interactionName = [NSString stringWithFormat:@"RCCViewController: %@", moduleName];
    }
  }
  
  if (interactionName == nil)
  {
    interactionName = [NSString stringWithFormat:@"RCCViewController with title: %@", self.title];
  }
  
  return interactionName;
}

- (void)performAction:(NSString*)performAction actionParams:(NSDictionary*)actionParams bridge:(RCTBridge *)bridge
{
  if ([performAction isEqualToString:@"refresh"]){
    [self setProps:actionParams];
  }
  // setButtons
  if ([performAction isEqualToString:@"setButtons"])
  {
    NSArray *buttons = actionParams[@"buttons"];
    BOOL animated = actionParams[@"animated"] ? [actionParams[@"animated"] boolValue] : YES;
    NSString *side = actionParams[@"side"] ? actionParams[@"side"] : @"left";
    
    [self setButtons:buttons side:side animated:animated];
    return;
  }
  
  // setTitle
  if ([performAction isEqualToString:@"setTitle"])
  {
    NSString *title = actionParams[@"title"];
    if (title) self.title = title;
    return;
  }
  
  if ([performAction isEqualToString:@"setTitleImage"])
  {
    [self setTitleImage:actionParams[@"titleImage"]];
    return;
  }
  
  if ([performAction isEqualToString:@"setStyle"]){
    [self setParentStyle:actionParams];
    if (actionParams[@"navBarHidden"]){
      NSNumber *navBarHidden = actionParams[@"navBarHidden"];
      BOOL navBarHiddenBool = navBarHidden ? [navBarHidden boolValue] : NO;
      if (self.navigationController.navigationBarHidden != navBarHiddenBool)
      {
        [self.navigationController setNavigationBarHidden:navBarHiddenBool animated:YES];
      }
    }
  }

}


-(void)setParentStyle:(NSDictionary *)parentStyle {
  [super setParentStyle:parentStyle];
  NSMutableDictionary *mergedStyle = [NSMutableDictionary dictionaryWithDictionary:parentStyle];
  
  // there are a few styles that we don't want to remember from our parent (they should be local)
  [mergedStyle removeObjectForKey:@"navBarHidden"];
  [mergedStyle removeObjectForKey:@"statusBarHidden"];
  [mergedStyle removeObjectForKey:@"navBarHideOnScroll"];
  [mergedStyle removeObjectForKey:@"drawUnderNavBar"];
  [mergedStyle removeObjectForKey:@"drawUnderTabBar"];
  [mergedStyle removeObjectForKey:@"statusBarBlur"];
  [mergedStyle removeObjectForKey:@"navBarBlur"];
  [mergedStyle removeObjectForKey:@"navBarTranslucent"];
  [mergedStyle removeObjectForKey:@"navBarTranslucent"];
  [mergedStyle removeObjectForKey:@"statusBarHideWithNavBar"];
  
  NSMutableDictionary *newStyle = [NSMutableDictionary dictionaryWithDictionary:self.navigatorStyle];
  [newStyle addEntriesFromDictionary:mergedStyle];
  self.navigatorStyle = newStyle;
  [self setStyleOnAppearForViewController:self];
}


@end