//
 /* 
  * SwiftFin is subject to the terms of the Mozilla Public
  * License, v2.0. If a copy of the MPL was not distributed with this
  * file, you can obtain one at https://mozilla.org/MPL/2.0/.
  *
  * Copyright 2021 Aiden Vigue & Jellyfin Contributors
  */

import JellyfinAPI
import Nuke
import SwiftUI
import UIKit

class DynamicCinematicBackgroundViewModel: ObservableObject {
    
    @Published var currentItem: BaseItemDto?
    @Published var currentImageView: UIImageView?
    
    func select(item: BaseItemDto) {
        
        guard item.id != currentItem?.id else { return }
        
        currentItem = item
        
        let itemImageView = UIImageView()
        
        let backdropImage: URL
        
        if item.itemType == .episode {
            backdropImage = item.getSeriesBackdropImage(maxWidth: 1920)
        } else {
            backdropImage = item.getBackdropImage(maxWidth: 1920)
        }
        
        let options = ImageLoadingOptions(transition: .fadeIn(duration: 0.2))
        
        Nuke.loadImage(with: backdropImage, options: options, into: itemImageView, completion: { _ in })
        
        currentImageView = itemImageView
    }
}

struct CinematicBackgroundView: UIViewRepresentable {
    
    @ObservedObject var viewModel: DynamicCinematicBackgroundViewModel
    
    func updateUIView(_ uiView: UICinematicBackgroundView, context: Context) {
        uiView.update(imageView: viewModel.currentImageView ?? UIImageView())
    }
    
    func makeUIView(context: Context) -> UICinematicBackgroundView {
        return UICinematicBackgroundView(initialImageView: viewModel.currentImageView ?? UIImageView())
    }
}