#import <UIKit/UIKit.h>

typedef NS_ENUM(NSUInteger, KeyboardState) {
	KeyboardStateHidden,
	KeyboardStateWillShow,
	KeyboardStateShown,
	KeyboardStateWillHide
};

@class ObservingInputAccessoryView;

@interface ObservingInputAccessoryViewManager : NSObject;
+(ObservingInputAccessoryViewManager*)sharedInstance;
@property (nonatomic, weak) ObservingInputAccessoryView *activeObservingInputAccessoryView;
@end

@protocol ObservingInputAccessoryViewDelegate <NSObject>

- (void)observingInputAccessoryViewDidChangeFrame:(ObservingInputAccessoryView*)observingInputAccessoryView;

@optional

- (void) observingInputAccessoryViewKeyboardWillAppear:(ObservingInputAccessoryView *)observingInputAccessoryView keyboardDelta:(CGFloat)keyboardDelta animationDuration:(double)animationDuration keyboardFrameEndHeight:(CGFloat)keyboardFrameEndHeight;
- (void)observingInputAccessoryViewKeyboardWillDisappear:(ObservingInputAccessoryView*)observingInputAccessoryView;

@end

@interface ObservingInputAccessoryView : UIView

@property (nonatomic, weak) id<ObservingInputAccessoryViewDelegate> delegate;

@property (nonatomic) CGFloat height;
@property (nonatomic, readonly) CGFloat keyboardHeight;
@property (nonatomic, readonly) KeyboardState keyboardState;

@end