import Foundation
import UIKit
import AVFoundation
import Display
import SwiftSignalKit
import TelegramCore
import AnimatedStickerNode
import TelegramAnimatedStickerNode
import StickerResources
import AccountContext
import MediaEditor

public final class DrawingStickerEntityView: DrawingEntityView {
    public class VideoView: UIView {
        init(player: AVPlayer) {
            super.init(frame: .zero)
            
            self.videoLayer.player = player
        }
        
        required init?(coder: NSCoder) {
            fatalError("init(coder:) has not been implemented")
        }
        
        var videoLayer: AVPlayerLayer {
            guard let layer = self.layer as? AVPlayerLayer else {
                fatalError()
            }
            return layer
        }
        
        public override class var layerClass: AnyClass {
            return AVPlayerLayer.self
        }
    }
    
    private var stickerEntity: DrawingStickerEntity {
        return self.entity as! DrawingStickerEntity
    }
    
    var started: ((Double) -> Void)?
    
    public var updated: () -> Void = {}
    
    private var currentSize: CGSize?
    
    private let imageNode: TransformImageNode
    private var animationNode: AnimatedStickerNode?
    
    private var videoContainerView: UIView?
    private var videoPlayer: AVPlayer?
    public var videoView: VideoView?
    private var videoImageView: UIImageView?
    
    public var mainView: MediaEditorPreviewView? {
        didSet {
            if let mainView = self.mainView {
                self.videoContainerView?.addSubview(mainView)
            } else {
                if let previous = oldValue, previous.superview === self {
                    previous.removeFromSuperview()
                }
                if let videoView = self.videoView {
                    self.videoContainerView?.addSubview(videoView)
                }
            }
        }
    }
    
    private var didSetUpAnimationNode = false
    private let stickerFetchedDisposable = MetaDisposable()
    private let cachedDisposable = MetaDisposable()
    
    private var isVisible = true
    private var isPlaying = false
    
    init(context: AccountContext, entity: DrawingStickerEntity) {
        self.imageNode = TransformImageNode()
        
        super.init(context: context, entity: entity)
        
        self.addSubview(self.imageNode.view)
                
        self.setup()
    }
    
    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    deinit {
        self.stickerFetchedDisposable.dispose()
        self.cachedDisposable.dispose()
    }
    
    private var file: TelegramMediaFile? {
        if case let .file(file) = self.stickerEntity.content {
            return file
        } else {
            return nil
        }
    }
    
    private var image: UIImage? {
        if case let .image(image, _) = self.stickerEntity.content {
            return image
        } else {
            return nil
        }
    }
    
    private var video: String? {
        if case let .video(path, _, _) = self.stickerEntity.content {
            return path
        } else {
            return nil
        }
    }
    
    private var dimensions: CGSize {
        switch self.stickerEntity.content {
        case let .file(file):
            return file.dimensions?.cgSize ?? CGSize(width: 512.0, height: 512.0)
        case let .image(image, _):
            return image.size
        case let .video(_, image, _):
            if let image {
                let minSide = min(image.size.width, image.size.height)
                return CGSize(width: minSide, height: minSide)
            } else {
                return CGSize(width: 512.0, height: 512.0)
            }
        case .dualVideoReference:
            return CGSize(width: 512.0, height: 512.0)
        }
    }
    
    private func setup() {
        if let file = self.file {
            if let dimensions = file.dimensions {
                if file.isAnimatedSticker || file.isVideoSticker || file.mimeType == "video/webm" {
                    if self.animationNode == nil {
                        let animationNode = DefaultAnimatedStickerNodeImpl()
                        animationNode.autoplay = false
                        self.animationNode = animationNode
                        animationNode.started = { [weak self, weak animationNode] in
                            self?.imageNode.isHidden = true
                                                        
                            if let animationNode = animationNode {
                                if animationNode.currentFrameCount == 1 {
                                    self?.stickerEntity.isExplicitlyStatic = true
                                }
                                let _ = (animationNode.status
                                |> take(1)
                                |> deliverOnMainQueue).start(next: { [weak self] status in
                                    self?.started?(status.duration)
                                })
                            }
                        }
                        self.addSubnode(animationNode)
                        
                        if file.isCustomTemplateEmoji {
                            animationNode.dynamicColor = UIColor(rgb: 0xffffff)
                        }
                    }
                    self.imageNode.setSignal(chatMessageAnimatedSticker(postbox: self.context.account.postbox, userLocation: .other, file: file, small: false, size: dimensions.cgSize.aspectFitted(CGSize(width: 256.0, height: 256.0))))
                    self.stickerFetchedDisposable.set(freeMediaFileResourceInteractiveFetched(account: self.context.account, userLocation: .other, fileReference: stickerPackFileReference(file), resource: file.resource).start())
                } else {
                    if let animationNode = self.animationNode {
                        animationNode.visibility = false
                        self.animationNode = nil
                        animationNode.removeFromSupernode()
                        self.imageNode.isHidden = false
                        self.didSetUpAnimationNode = false
                    }
                    self.imageNode.setSignal(chatMessageSticker(account: self.context.account, userLocation: .other, file: file, small: false, synchronousLoad: false))
                    self.stickerFetchedDisposable.set(freeMediaFileResourceInteractiveFetched(account: self.context.account, userLocation: .other, fileReference: stickerPackFileReference(file), resource: chatMessageStickerResource(file: file, small: false)).start())
                }
                self.setNeedsLayout()
            }
        } else if let image = self.image {
            func drawImageWithOrientation(_ image: UIImage, size: CGSize, in context: CGContext) {
                let imageSize: CGSize
                
                switch image.imageOrientation {
                case .left, .leftMirrored, .right, .rightMirrored:
                    imageSize = CGSize(width: size.height, height: size.width)
                default:
                    imageSize = size
                }
                
                let imageRect = CGRect(origin: .zero, size: imageSize)
                                
                switch image.imageOrientation {
                case .down, .downMirrored:
                    context.translateBy(x: imageSize.width, y: imageSize.height)
                    context.rotate(by: CGFloat.pi)
                case .left, .leftMirrored:
                    context.translateBy(x: imageSize.width, y: 0)
                    context.rotate(by: CGFloat.pi / 2)
                case .right, .rightMirrored:
                    context.translateBy(x: 0, y: imageSize.height)
                    context.rotate(by: -CGFloat.pi / 2)
                default:
                    break
                }
                
//                switch image.imageOrientation {
//                case .leftMirrored, .rightMirrored:
//                    context.scaleBy(x: -1, y: 1)
//                default:
//                    context.scaleBy(x: 1, y: -1)
//                }
                
                context.draw(image.cgImage!, in: imageRect)
            }
            
            var synchronous = false
            if case let .image(_, type) = self.stickerEntity.content {
                synchronous = type == .dualPhoto
            }
            self.imageNode.setSignal(.single({ arguments -> DrawingContext? in
                let context = DrawingContext(size: arguments.drawingSize, opaque: false, clear: true)
                context?.withFlippedContext({ ctx in
                    drawImageWithOrientation(image, size: arguments.drawingSize, in: ctx)
                })
                return context
            }), attemptSynchronously: synchronous)
            self.setNeedsLayout()
        } else if case let .video(videoPath, image, _) = self.stickerEntity.content {
            let url = URL(fileURLWithPath: videoPath)
            let asset = AVURLAsset(url: url)
            let playerItem = AVPlayerItem(asset: asset)
            let player = AVPlayer(playerItem: playerItem)
            player.automaticallyWaitsToMinimizeStalling = false
           
            let videoContainerView = UIView()
            videoContainerView.clipsToBounds = true
            
            let videoView = VideoView(player: player)
            videoContainerView.addSubview(videoView)
            
            self.addSubview(videoContainerView)
            
            self.videoPlayer = player
            self.videoContainerView = videoContainerView
            self.videoView = videoView
            
            let imageView = UIImageView(image: image)
            imageView.clipsToBounds = true
            imageView.contentMode = .scaleAspectFill
            videoContainerView.addSubview(imageView)
            self.videoImageView = imageView
        }
    }
    
    public override func play() {
        self.isVisible = true
        self.applyVisibility()
        
        if let player = self.videoPlayer {
            player.play()
            
            if let videoImageView = self.videoImageView {
                self.videoImageView = nil
                Queue.mainQueue().after(0.1) {
                    videoImageView.layer.animateAlpha(from: 1.0, to: 0.0, duration: 0.1, removeOnCompletion: false, completion: { [weak videoImageView] _ in
                        videoImageView?.removeFromSuperview()
                    })
                }
            }
        }
    }
    
    public override func pause() {
        self.isVisible = false
        self.applyVisibility()
        
        if let player = self.videoPlayer {
            player.pause()
        }
    }
    
    public override func seek(to timestamp: Double) {
        self.isVisible = false
        self.isPlaying = false
        self.animationNode?.seekTo(.timestamp(timestamp))
        
        if let player = self.videoPlayer {
            player.seek(to: CMTime(seconds: timestamp, preferredTimescale: CMTimeScale(60.0)), toleranceBefore: .zero, toleranceAfter: .zero, completionHandler: { _ in })
        }
    }
    
    override func resetToStart() {
        self.isVisible = false
        self.isPlaying = false
        self.animationNode?.seekTo(.timestamp(0.0))
    }
    
    override func updateVisibility(_ visibility: Bool) {
        self.isVisible = visibility
        self.applyVisibility()
    }
    
    private func applyVisibility() {
        let isPlaying = self.isVisible
        if self.isPlaying != isPlaying {
            self.isPlaying = isPlaying
            
            if let file = self.file {
                if isPlaying && !self.didSetUpAnimationNode {
                    self.didSetUpAnimationNode = true
                    let dimensions = file.dimensions ?? PixelDimensions(width: 512, height: 512)
                    let fittedDimensions = dimensions.cgSize.aspectFitted(CGSize(width: 384.0, height: 384.0))
                    let source = AnimatedStickerResourceSource(account: self.context.account, resource: file.resource, isVideo: file.isVideoSticker || file.mimeType == "video/webm")
                    let pathPrefix = self.context.account.postbox.mediaBox.shortLivedResourceCachePathPrefix(file.resource.id)
                    self.animationNode?.setup(source: source, width: Int(fittedDimensions.width), height: Int(fittedDimensions.height), playbackMode: .loop, mode: .direct(cachePathPrefix: pathPrefix))
                    
                    self.cachedDisposable.set((source.cachedDataPath(width: 384, height: 384)
                    |> deliverOn(Queue.concurrentDefaultQueue())).start())
                }
            }
            self.animationNode?.visibility = isPlaying
        }
    }
    
    private var didApplyVisibility = false
    public override func layoutSubviews() {
        super.layoutSubviews()
        
        let size = self.bounds.size
        
        if size.width > 0 && self.currentSize != size {
            self.currentSize = size
            
            let sideSize: CGFloat = max(size.width, size.height)
            let boundingSize = CGSize(width: sideSize, height: sideSize)
            
            let imageSize = self.dimensions.aspectFitted(boundingSize)
            let imageFrame = CGRect(origin: CGPoint(x: floor((size.width - imageSize.width) / 2.0), y: (size.height - imageSize.height) / 2.0), size: imageSize)
            self.imageNode.asyncLayout()(TransformImageArguments(corners: ImageCorners(), imageSize: imageSize, boundingSize: imageSize, intrinsicInsets: UIEdgeInsets()))()
            self.imageNode.frame = imageFrame
            if let animationNode = self.animationNode {
                animationNode.frame = imageFrame
                animationNode.updateLayout(size: imageSize)
                
                if !self.didApplyVisibility {
                    self.didApplyVisibility = true
                    self.applyVisibility()
                }
            }
            
            if let videoView = self.videoView {
                let videoSize = CGSize(width: imageFrame.width, height: imageFrame.width / 9.0 * 16.0)
                videoView.frame = CGRect(origin: CGPoint(x: 0.0, y: floorToScreenPixels((imageFrame.height - videoSize.height) / 2.0)), size: videoSize)
            }
            if let videoContainerView = self.videoContainerView {
                videoContainerView.layer.cornerRadius = imageFrame.width / 2.0
                videoContainerView.frame = imageFrame
            }
            if let videoImageView = self.videoImageView {
                videoImageView.frame = CGRect(origin: .zero, size: imageFrame.size)
            }
            
            self.update(animated: false)
        }
    }
        
    public override func update(animated: Bool) {
        self.center = self.stickerEntity.position
        
        let size = self.stickerEntity.baseSize
        
        self.bounds = CGRect(origin: .zero, size: self.dimensions.aspectFitted(size))
        self.transform = CGAffineTransformScale(CGAffineTransformMakeRotation(self.stickerEntity.rotation), self.stickerEntity.scale, self.stickerEntity.scale)
    
        let staticTransform = CATransform3DMakeScale(self.stickerEntity.mirrored ? -1.0 : 1.0, 1.0, 1.0)

        if animated {
            let isCurrentlyMirrored = ((self.imageNode.layer.value(forKeyPath: "transform.scale.y") as? NSNumber)?.floatValue ?? 1.0) < 0.0
            var animationSourceTransform = CATransform3DIdentity
            var animationTargetTransform = CATransform3DIdentity
            if isCurrentlyMirrored {
                animationSourceTransform = CATransform3DRotate(animationSourceTransform, .pi, 0.0, 1.0, 0.0)
                animationSourceTransform.m34 = -1.0 / self.imageNode.frame.width
            }
            if self.stickerEntity.mirrored {
                animationTargetTransform = CATransform3DRotate(animationTargetTransform, .pi, 0.0, 1.0, 0.0)
                animationTargetTransform.m34 = -1.0 / self.imageNode.frame.width
            }
            self.imageNode.transform = animationSourceTransform
            self.animationNode?.transform = animationSourceTransform
            UIView.animate(withDuration: 0.25, animations: {
                self.imageNode.transform = animationTargetTransform
                self.animationNode?.transform = animationTargetTransform
                self.videoContainerView?.layer.transform = animationTargetTransform
            }, completion: { finished in
                self.imageNode.transform = staticTransform
                self.animationNode?.transform = staticTransform
                self.videoContainerView?.layer.transform = staticTransform
            })
        } else {
            CATransaction.begin()
            CATransaction.setDisableActions(true)
            self.imageNode.transform = staticTransform
            self.animationNode?.transform = staticTransform
            self.videoContainerView?.layer.transform = staticTransform
            CATransaction.commit()
        }
        
        self.updated()
    
        super.update(animated: animated)
    }
    
    override func updateSelectionView() {
        guard let selectionView = self.selectionView as? DrawingStickerEntititySelectionView else {
            return
        }
        self.pushIdentityTransformForMeasurement()
     
        selectionView.transform = .identity
        let maxSide = max(self.selectionBounds.width, self.selectionBounds.height)
        let center = self.selectionBounds.center
        
        let scale = self.superview?.superview?.layer.value(forKeyPath: "transform.scale.x") as? CGFloat ?? 1.0
        selectionView.center = self.convert(center, to: selectionView.superview)
        
        selectionView.bounds = CGRect(origin: .zero, size: CGSize(width: (maxSide * self.stickerEntity.scale) * scale + selectionView.selectionInset * 2.0, height: (maxSide * self.stickerEntity.scale) * scale + selectionView.selectionInset * 2.0))
        selectionView.transform = CGAffineTransformMakeRotation(self.stickerEntity.rotation)
        
        self.popIdentityTransformForMeasurement()
    }
        
    override func makeSelectionView() -> DrawingEntitySelectionView? {
        if let selectionView = self.selectionView {
            return selectionView
        }
        let selectionView = DrawingStickerEntititySelectionView()
        selectionView.entityView = self
        return selectionView
    }
}

final class DrawingStickerEntititySelectionView: DrawingEntitySelectionView {
    private let border = SimpleShapeLayer()
    private let leftHandle = SimpleShapeLayer()
    private let rightHandle = SimpleShapeLayer()
    
    override init(frame: CGRect) {
        let handleBounds = CGRect(origin: .zero, size: entitySelectionViewHandleSize)
        let handles = [
            self.leftHandle,
            self.rightHandle
        ]
        
        super.init(frame: frame)
        
        self.backgroundColor = .clear
        self.isOpaque = false
        
        self.border.lineCap = .round
        self.border.fillColor = UIColor.clear.cgColor
        self.border.strokeColor = UIColor(rgb: 0xffffff, alpha: 0.5).cgColor
        self.border.shadowColor = UIColor.black.cgColor
        self.border.shadowRadius = 1.0
        self.border.shadowOpacity = 0.5
        self.border.shadowOffset = CGSize()
        self.layer.addSublayer(self.border)
        
        for handle in handles {
            handle.bounds = handleBounds
            handle.fillColor = UIColor(rgb: 0x0a60ff).cgColor
            handle.strokeColor = UIColor(rgb: 0xffffff).cgColor
            handle.rasterizationScale = UIScreen.main.scale
            handle.shouldRasterize = true
            
            self.layer.addSublayer(handle)
        }
                
        self.snapTool.onSnapUpdated = { [weak self] type, snapped in
            if let self, let entityView = self.entityView {
                entityView.onSnapUpdated(type, snapped)
            }
        }
    }
    
    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    var scale: CGFloat = 1.0 {
        didSet {
            self.setNeedsLayout()
        }
    }
    
    override var selectionInset: CGFloat {
        return 18.0
    }
    
    private let snapTool = DrawingEntitySnapTool()
    
    private var currentHandle: CALayer?
    override func handlePan(_ gestureRecognizer: UIPanGestureRecognizer) {
        guard let entityView = self.entityView, let entity = entityView.entity as? DrawingStickerEntity else {
            return
        }
        let location = gestureRecognizer.location(in: self)
        
        switch gestureRecognizer.state {
        case .began:
            self.snapTool.maybeSkipFromStart(entityView: entityView, position: entity.position)
            
            if let sublayers = self.layer.sublayers {
                for layer in sublayers {
                    if layer.frame.contains(location) {
                        self.currentHandle = layer
                        self.snapTool.maybeSkipFromStart(entityView: entityView, rotation: entity.rotation)
                        entityView.onInteractionUpdated(true)
                        return
                    }
                }
            }
            self.currentHandle = self.layer
            entityView.onInteractionUpdated(true)
        case .changed:
            if self.currentHandle == nil {
                self.currentHandle = self.layer
            }

            let delta = gestureRecognizer.translation(in: entityView.superview)
            let parentLocation = gestureRecognizer.location(in: self.superview)
            let velocity = gestureRecognizer.velocity(in: entityView.superview)
                        
            var updatedPosition = entity.position
            var updatedScale = entity.scale
            var updatedRotation = entity.rotation
            
            if self.currentHandle === self.leftHandle || self.currentHandle === self.rightHandle {
                if gestureRecognizer.numberOfTouches > 1 {
                    return
                }
                var deltaX = gestureRecognizer.translation(in: self).x
                if self.currentHandle === self.leftHandle {
                    deltaX *= -1.0
                }
                let scaleDelta = (self.bounds.size.width + deltaX * 2.0) / self.bounds.size.width
                updatedScale *= scaleDelta
                
                let newAngle: CGFloat
                if self.currentHandle === self.leftHandle {
                    newAngle = atan2(self.center.y - parentLocation.y, self.center.x - parentLocation.x)
                } else {
                    newAngle = atan2(parentLocation.y - self.center.y, parentLocation.x - self.center.x)
                }
                
             //   let delta = newAngle - updatedRotation
                updatedRotation = newAngle// self.snapTool.update(entityView: entityView, velocity: 0.0, delta: delta, updatedRotation: newAngle)
            } else if self.currentHandle === self.layer {
                updatedPosition.x += delta.x
                updatedPosition.y += delta.y
                
                updatedPosition = self.snapTool.update(entityView: entityView, velocity: velocity, delta: delta, updatedPosition: updatedPosition, size: entityView.frame.size)
            }
            
            entity.position = updatedPosition
            entity.scale = updatedScale
            entity.rotation = updatedRotation
            entityView.update()
            
            gestureRecognizer.setTranslation(.zero, in: entityView)
        case .ended, .cancelled:
            self.snapTool.reset()
            if self.currentHandle != nil {
                self.snapTool.rotationReset()
            }
            entityView.onInteractionUpdated(false)
        default:
            break
        }
        
        entityView.onPositionUpdated(entity.position)
    }
    
    override func handlePinch(_ gestureRecognizer: UIPinchGestureRecognizer) {
        guard let entityView = self.entityView, let entity = entityView.entity as? DrawingStickerEntity else {
            return
        }
        
        if self.currentHandle != nil && self.currentHandle !== self.layer {
            return
        }

        switch gestureRecognizer.state {
        case .began, .changed:
            if case .began = gestureRecognizer.state {
                entityView.onInteractionUpdated(true)
            }
            let scale = gestureRecognizer.scale
            entity.scale = entity.scale * scale
            entityView.update()

            gestureRecognizer.scale = 1.0
        case .cancelled, .ended:
            entityView.onInteractionUpdated(false)
        default:
            break
        }
    }
    
    override func handleRotate(_ gestureRecognizer: UIRotationGestureRecognizer) {
        guard let entityView = self.entityView, let entity = entityView.entity as? DrawingStickerEntity else {
            return
        }
        
        if self.currentHandle != nil && self.currentHandle !== self.layer {
            return
        }
        
        let velocity = gestureRecognizer.velocity
        var updatedRotation = entity.rotation
        var rotation: CGFloat = 0.0
        
        switch gestureRecognizer.state {
        case .began:
            self.snapTool.maybeSkipFromStart(entityView: entityView, rotation: entity.rotation)
            entityView.onInteractionUpdated(true)
        case .changed:
            rotation = gestureRecognizer.rotation
            updatedRotation += rotation
        
            updatedRotation = self.snapTool.update(entityView: entityView, velocity: velocity, delta: rotation, updatedRotation: updatedRotation)
            entity.rotation = updatedRotation
            entityView.update()
            
            gestureRecognizer.rotation = 0.0
        case .ended, .cancelled:
            self.snapTool.rotationReset()
            entityView.onInteractionUpdated(false)
        default:
            break
        }
                
        entityView.onPositionUpdated(entity.position)
    }
    
    override func point(inside point: CGPoint, with event: UIEvent?) -> Bool {
        return self.bounds.insetBy(dx: -22.0, dy: -22.0).contains(point)
    }
    
    override func layoutSubviews() {
        guard let entityView = self.entityView, let entity = entityView.entity as? DrawingStickerEntity else {
            return
        }
        
        let inset = self.selectionInset - 10.0

        let bounds = CGRect(origin: .zero, size: CGSize(width: entitySelectionViewHandleSize.width / self.scale, height: entitySelectionViewHandleSize.height / self.scale))
        let handleSize = CGSize(width: 9.0 / self.scale, height: 9.0 / self.scale)
        let handlePath = CGPath(ellipseIn: CGRect(origin: CGPoint(x: (bounds.width - handleSize.width) / 2.0, y: (bounds.height - handleSize.height) / 2.0), size: handleSize), transform: nil)
        let lineWidth = (1.0 + UIScreenPixel) / self.scale
                
        let radius = (self.bounds.width - inset * 2.0) / 2.0
        let circumference: CGFloat = 2.0 * .pi * radius
        let relativeDashLength: CGFloat = 0.25
        
        self.border.lineWidth = 2.0 / self.scale
        
        let actualInset: CGFloat
        if entity.isRectangle {
            let aspectRatio = entity.baseSize.width / entity.baseSize.height
            
            let width: CGFloat
            let height: CGFloat
            
            if entity.baseSize.width > entity.baseSize.height {
                width = self.bounds.width - inset * 2.0
                height = self.bounds.height / aspectRatio - inset * 2.0
            } else {
                width = self.bounds.width * aspectRatio - inset * 2.0
                height = self.bounds.height - inset * 2.0
            }
            
            actualInset = floorToScreenPixels((self.bounds.width - width) / 2.0)
            
            let cornerRadius: CGFloat = 12.0 - self.scale
            let perimeter: CGFloat = 2.0 * (width + height - cornerRadius * (4.0 - .pi))
            let count = 12
            let dashLength = perimeter / CGFloat(count)
            self.border.lineDashPattern = [dashLength * relativeDashLength, dashLength * relativeDashLength] as [NSNumber]
            
            self.border.path = UIBezierPath(roundedRect: CGRect(origin: CGPoint(x: floorToScreenPixels((self.bounds.width - width) / 2.0), y: floorToScreenPixels((self.bounds.height - height) / 2.0)), size: CGSize(width: width, height: height)), cornerRadius: cornerRadius).cgPath
        } else {
            actualInset = inset
            
            let count = 10
            let dashLength = circumference / CGFloat(count)
            self.border.lineDashPattern = [dashLength * relativeDashLength, dashLength * relativeDashLength] as [NSNumber]
            
            self.border.path = UIBezierPath(ovalIn: CGRect(origin: CGPoint(x: inset, y: inset), size: CGSize(width: self.bounds.width - inset * 2.0, height: self.bounds.height - inset * 2.0))).cgPath
        }
        
        let handles = [
            self.leftHandle,
            self.rightHandle
        ]
        
        for handle in handles {
            handle.path = handlePath
            handle.bounds = bounds
            handle.lineWidth = lineWidth
        }
        
        
        self.leftHandle.position = CGPoint(x: actualInset, y: self.bounds.midY)
        self.rightHandle.position = CGPoint(x: self.bounds.maxX - actualInset, y: self.bounds.midY)
    }
}