/**
 * Copyright (c) 2015-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */

#import "RCTInputAccessoryViewContent.h"

#import <React/UIView+React.h>

@implementation RCTInputAccessoryViewContent
{
    UIView *_safeAreaContainer;
    UIVisualEffectView *_blurView;
    NSLayoutConstraint *_heightConstraint;
}

- (instancetype)init
{
    if (self = [super init]) {
        UIVisualEffect *blurEffect = [UIBlurEffect effectWithStyle:UIBlurEffectStyleLight];
        
        _blurView = [[UIVisualEffectView alloc] initWithEffect:blurEffect];
        [_blurView setBackgroundColor: [UIColor.whiteColor colorWithAlphaComponent:0.5]];
        _safeAreaContainer = [UIView new];
        
        [_blurView.contentView addSubview:_safeAreaContainer];
        [self addSubview:_blurView];
        
        // Use autolayout to position the view properly and take into account
        // safe area insets on iPhone X.
        // TODO: Support rotation, anchor to left and right without breaking frame x coordinate (T27974328).
        self.autoresizingMask = UIViewAutoresizingFlexibleHeight;
        _blurView.autoresizingMask = UIViewAutoresizingFlexibleHeight;
        _safeAreaContainer.translatesAutoresizingMaskIntoConstraints = NO;
        
        
        _heightConstraint = [_safeAreaContainer.heightAnchor constraintEqualToConstant:0];
        _heightConstraint.active = YES;
        
        if (@available(iOS 11.0, *)) {
            [_safeAreaContainer.bottomAnchor constraintEqualToAnchor:self.safeAreaLayoutGuide.bottomAnchor].active = YES;
            [_safeAreaContainer.topAnchor constraintEqualToAnchor:self.safeAreaLayoutGuide.topAnchor].active = YES;
            [_safeAreaContainer.leadingAnchor constraintEqualToAnchor:self.safeAreaLayoutGuide.leadingAnchor].active = YES;
            [_safeAreaContainer.trailingAnchor constraintEqualToAnchor:self.safeAreaLayoutGuide.trailingAnchor].active = YES;
        } else {
            [_safeAreaContainer.bottomAnchor constraintEqualToAnchor:self.bottomAnchor].active = YES;
            [_safeAreaContainer.topAnchor constraintEqualToAnchor:self.topAnchor].active = YES;
            [_safeAreaContainer.leadingAnchor constraintEqualToAnchor:self.leadingAnchor].active = YES;
            [_safeAreaContainer.trailingAnchor constraintEqualToAnchor:self.trailingAnchor].active = YES;
        }
        
    }
    return self;
}

- (CGSize)intrinsicContentSize
{
    // This is needed so the view size is based on autolayout constraints.
    return CGSizeZero;
}

- (void)reactSetFrame:(CGRect)frame
{
    // We still need to set the frame here, otherwise it won't be
    // measured until moved to the window during the keyboard opening
    // animation. If this happens, the height will be animated from 0 to
    // its actual size and we don't want that.
    [self setFrame:frame];
    [_safeAreaContainer setFrame:frame];
    [_blurView setFrame:frame];
    
    _heightConstraint.constant = frame.size.height;
}

- (void)insertReactSubview:(UIView *)subview atIndex:(NSInteger)index
{
    
    [super insertReactSubview:subview atIndex:index];
    [_safeAreaContainer insertSubview:subview atIndex:index];
}

- (void)removeReactSubview:(UIView *)subview
{
    [super removeReactSubview:subview];
    [subview removeFromSuperview];
    if ([[_safeAreaContainer subviews] count] == 0 && [self isFirstResponder]) {
        [self resignFirstResponder];
    }
}

@end