// Copyright (c) RxSwiftCommunity

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import UIKit
import RxSwift
import RxCocoa

public typealias RotationConfiguration = Configuration<UIRotationGestureRecognizer>
public typealias RotationControlEvent = ControlEvent<UIRotationGestureRecognizer>
public typealias RotationObservable = Observable<UIRotationGestureRecognizer>

extension Factory where Gesture == GestureRecognizer {

    /**
     Returns an `AnyFactory` for `UIRotationGestureRecognizer`
     - parameter configuration: A closure that allows to fully configure the gesture recognizer
     */
    public static func rotation(configuration: RotationConfiguration? = nil) -> AnyFactory {
        return make(configuration: configuration).abstracted()
    }
}

extension Reactive where Base: View {

    /**
     Returns an observable `UIRotationGestureRecognizer` events sequence
     - parameter configuration: A closure that allows to fully configure the gesture recognizer
     */
    public func rotationGesture(configuration: RotationConfiguration? = nil) -> RotationControlEvent {
        return gesture(make(configuration: configuration))
    }
}

extension ObservableType where Element: UIRotationGestureRecognizer {

    /**
     Maps the observable `GestureRecognizer` events sequence to an observable sequence of rotation values of the gesture in radians alongside the gesture velocity.
     */
    public func asRotation() -> Observable<(rotation: CGFloat, velocity: CGFloat)> {
        return self.map { gesture in
            return (gesture.rotation, gesture.velocity)
        }
    }
}