//
//  GifvPlayerView.swift
//  Tusker
//
//  Created by Shadowfacts on 5/12/20.
//  Copyright © 2020 Shadowfacts. All rights reserved.
//

import UIKit
import AVFoundation
import Combine

class GifvPlayerView: UIView {
    
    override class var layerClass: AnyClass {
        return AVPlayerLayer.self
    }
    
    private var playerLayer: AVPlayerLayer {
        layer as! AVPlayerLayer
    }

    let controller: GifvController
    private var presentationSizeCancellable: AnyCancellable?
    
    override var intrinsicContentSize: CGSize {
        controller.item.presentationSize
    }
    
    init(controller: GifvController, gravity: AVLayerVideoGravity) {
        self.controller = controller

        super.init(frame: .zero)
        
        playerLayer.player = controller.player
        playerLayer.videoGravity = gravity
        
        presentationSizeCancellable = controller.presentationSizeSubject
            .sink(receiveValue: { [unowned self] _ in
                self.invalidateIntrinsicContentSize()
            })
    }
    
    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
}