/*
 * Copyright (c) Facebook, Inc. and its affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */

#import "RCTTVView.h"

#import "RCTAutoInsetsProtocol.h"
#import "RCTBorderDrawing.h"
#import "RCTBridge.h"
#import "RCTConvert.h"
#import "RCTEventDispatcher.h"
#import "RCTLog.h"
#import "RCTRootViewInternal.h"
#import "RCTTVNavigationEventEmitter.h"
#import "RCTUtils.h"
#import "RCTView.h"
#import "UIView+React.h"

@implementation RCTTVView {
  UITapGestureRecognizer *_selectRecognizer;
}

- (instancetype)initWithFrame:(CGRect)frame
{
  if (self = [super initWithFrame:frame]) {
    dispatch_once(&onceToken, ^{
      defaultTVParallaxProperties = @{
        @"enabled" : @YES,
        @"shiftDistanceX" : @2.0f,
        @"shiftDistanceY" : @2.0f,
        @"tiltAngle" : @0.05f,
        @"magnification" : @1.0f,
        @"pressMagnification" : @1.0f,
        @"pressDuration" : @0.3f,
        @"pressDelay" : @0.0f
      };
    });
    self.tvParallaxProperties = defaultTVParallaxProperties;
  }

  return self;
}

static NSDictionary *defaultTVParallaxProperties = nil;
static dispatch_once_t onceToken;

- (void)setTvParallaxProperties:(NSDictionary *)tvParallaxProperties
{
  if (_tvParallaxProperties == nil) {
    _tvParallaxProperties = [defaultTVParallaxProperties copy];
    return;
  }

  NSMutableDictionary *newParallaxProperties = [NSMutableDictionary dictionaryWithDictionary:_tvParallaxProperties];
  for (NSString *k in [defaultTVParallaxProperties allKeys]) {
    if (tvParallaxProperties[k]) {
      newParallaxProperties[k] = tvParallaxProperties[k];
    }
  }
  _tvParallaxProperties = [newParallaxProperties copy];
}

RCT_NOT_IMPLEMENTED(-(instancetype)initWithCoder : unused)

- (void)setIsTVSelectable:(BOOL)isTVSelectable
{
  self->_isTVSelectable = isTVSelectable;
  if (isTVSelectable) {
    UITapGestureRecognizer *recognizer = [[UITapGestureRecognizer alloc] initWithTarget:self
                                                                                 action:@selector(handleSelect:)];
    recognizer.allowedPressTypes = @[ @(UIPressTypeSelect) ];
    _selectRecognizer = recognizer;
    [self addGestureRecognizer:_selectRecognizer];
  } else {
    if (_selectRecognizer) {
      [self removeGestureRecognizer:_selectRecognizer];
    }
  }
}

- (void)handleSelect:(__unused UIGestureRecognizer *)r
{
  if ([self.tvParallaxProperties[@"enabled"] boolValue] == YES) {
    float magnification = [self.tvParallaxProperties[@"magnification"] floatValue];
    float pressMagnification = [self.tvParallaxProperties[@"pressMagnification"] floatValue];

    // Duration of press animation
    float pressDuration = [self.tvParallaxProperties[@"pressDuration"] floatValue];

    // Delay of press animation
    float pressDelay = [self.tvParallaxProperties[@"pressDelay"] floatValue];

    [[NSRunLoop currentRunLoop] runUntilDate:[NSDate dateWithTimeIntervalSinceNow:pressDelay]];

    [UIView animateWithDuration:(pressDuration / 2)
        animations:^{
          self.transform = CGAffineTransformMakeScale(pressMagnification, pressMagnification);
        }
        completion:^(__unused BOOL finished1) {
          [UIView animateWithDuration:(pressDuration / 2)
              animations:^{
                self.transform = CGAffineTransformMakeScale(magnification, magnification);
              }
              completion:^(__unused BOOL finished2) {
                [[NSNotificationCenter defaultCenter]
                    postNotificationName:RCTTVNavigationEventNotification
                                  object:@{@"eventType" : @"select", @"tag" : self.reactTag}];
              }];
        }];

  } else {
    [[NSNotificationCenter defaultCenter] postNotificationName:RCTTVNavigationEventNotification
                                                        object:@{@"eventType" : @"select", @"tag" : self.reactTag}];
  }
}

- (BOOL)isUserInteractionEnabled
{
  return YES;
}

- (BOOL)canBecomeFocused
{
  return (self.isTVSelectable);
}

- (void)addParallaxMotionEffects
{
  // Size of shift movements
  CGFloat const shiftDistanceX = [self.tvParallaxProperties[@"shiftDistanceX"] floatValue];
  CGFloat const shiftDistanceY = [self.tvParallaxProperties[@"shiftDistanceY"] floatValue];

  // Make horizontal movements shift the centre left and right
  UIInterpolatingMotionEffect *xShift =
      [[UIInterpolatingMotionEffect alloc] initWithKeyPath:@"center.x"
                                                      type:UIInterpolatingMotionEffectTypeTiltAlongHorizontalAxis];
  xShift.minimumRelativeValue = @(shiftDistanceX * -1.0f);
  xShift.maximumRelativeValue = @(shiftDistanceX);

  // Make vertical movements shift the centre up and down
  UIInterpolatingMotionEffect *yShift =
      [[UIInterpolatingMotionEffect alloc] initWithKeyPath:@"center.y"
                                                      type:UIInterpolatingMotionEffectTypeTiltAlongVerticalAxis];
  yShift.minimumRelativeValue = @(shiftDistanceY * -1.0f);
  yShift.maximumRelativeValue = @(shiftDistanceY);

  // Size of tilt movements
  CGFloat const tiltAngle = [self.tvParallaxProperties[@"tiltAngle"] floatValue];

  // Now make horizontal movements effect a rotation about the Y axis for side-to-side rotation.
  UIInterpolatingMotionEffect *xTilt =
      [[UIInterpolatingMotionEffect alloc] initWithKeyPath:@"layer.transform"
                                                      type:UIInterpolatingMotionEffectTypeTiltAlongHorizontalAxis];

  // CATransform3D value for minimumRelativeValue
  CATransform3D transMinimumTiltAboutY = CATransform3DIdentity;
  transMinimumTiltAboutY.m34 = 1.0 / 500;
  transMinimumTiltAboutY = CATransform3DRotate(transMinimumTiltAboutY, tiltAngle * -1.0, 0, 1, 0);

  // CATransform3D value for minimumRelativeValue
  CATransform3D transMaximumTiltAboutY = CATransform3DIdentity;
  transMaximumTiltAboutY.m34 = 1.0 / 500;
  transMaximumTiltAboutY = CATransform3DRotate(transMaximumTiltAboutY, tiltAngle, 0, 1, 0);

  // Set the transform property boundaries for the interpolation
  xTilt.minimumRelativeValue = [NSValue valueWithCATransform3D:transMinimumTiltAboutY];
  xTilt.maximumRelativeValue = [NSValue valueWithCATransform3D:transMaximumTiltAboutY];

  // Now make vertical movements effect a rotation about the X axis for up and down rotation.
  UIInterpolatingMotionEffect *yTilt =
      [[UIInterpolatingMotionEffect alloc] initWithKeyPath:@"layer.transform"
                                                      type:UIInterpolatingMotionEffectTypeTiltAlongVerticalAxis];

  // CATransform3D value for minimumRelativeValue
  CATransform3D transMinimumTiltAboutX = CATransform3DIdentity;
  transMinimumTiltAboutX.m34 = 1.0 / 500;
  transMinimumTiltAboutX = CATransform3DRotate(transMinimumTiltAboutX, tiltAngle * -1.0, 1, 0, 0);

  // CATransform3D value for minimumRelativeValue
  CATransform3D transMaximumTiltAboutX = CATransform3DIdentity;
  transMaximumTiltAboutX.m34 = 1.0 / 500;
  transMaximumTiltAboutX = CATransform3DRotate(transMaximumTiltAboutX, tiltAngle, 1, 0, 0);

  // Set the transform property boundaries for the interpolation
  yTilt.minimumRelativeValue = [NSValue valueWithCATransform3D:transMinimumTiltAboutX];
  yTilt.maximumRelativeValue = [NSValue valueWithCATransform3D:transMaximumTiltAboutX];

  // Add all of the motion effects to this group
  self.motionEffects = @[ xShift, yShift, xTilt, yTilt ];

  float magnification = [self.tvParallaxProperties[@"magnification"] floatValue];

  [UIView animateWithDuration:0.2
                   animations:^{
                     self.transform = CGAffineTransformMakeScale(magnification, magnification);
                   }];
}

- (void)didUpdateFocusInContext:(UIFocusUpdateContext *)context
       withAnimationCoordinator:(UIFocusAnimationCoordinator *)coordinator
{
  if (context.nextFocusedView == self && self.isTVSelectable) {
    [self becomeFirstResponder];
    [coordinator
        addCoordinatedAnimations:^(void) {
          if ([self.tvParallaxProperties[@"enabled"] boolValue]) {
            [self addParallaxMotionEffects];
          }
          [[NSNotificationCenter defaultCenter]
              postNotificationName:RCTTVNavigationEventNotification
                            object:@{@"eventType" : @"focus", @"tag" : self.reactTag}];
        }
                      completion:^(void){
                      }];
  } else {
    [coordinator
        addCoordinatedAnimations:^(void) {
          [[NSNotificationCenter defaultCenter] postNotificationName:RCTTVNavigationEventNotification
                                                              object:@{@"eventType" : @"blur", @"tag" : self.reactTag}];
          [UIView animateWithDuration:0.2
                           animations:^{
                             self.transform = CGAffineTransformMakeScale(1, 1);
                           }];

          for (UIMotionEffect *effect in [self.motionEffects copy]) {
            [self removeMotionEffect:effect];
          }
        }
                      completion:^(void){
                      }];
    [self resignFirstResponder];
  }
}

- (void)setHasTVPreferredFocus:(BOOL)hasTVPreferredFocus
{
  _hasTVPreferredFocus = hasTVPreferredFocus;
  if (hasTVPreferredFocus) {
    dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(1.0 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
      UIView *rootview = self;
      while (![rootview isReactRootView] && rootview != nil) {
        rootview = [rootview superview];
      }
      if (rootview == nil)
        return;

      rootview = [rootview superview];

      [rootview setNeedsFocusUpdate];
      [rootview updateFocusIfNeeded];
    });
  }
}

@end
