yattee/Shared/VideoPlayerView.swift

import AVKit
import Siesta
import SwiftUI

struct VideoPlayerView: View {
    @EnvironmentObject<NavigationState> private var navigationState

    @ObservedObject private var store = Store<Video>()

    var resource: Resource {
        InvidiousAPI.shared.video(video.id)
    }

    var video: Video

    var player: AVPlayer!

    init(_ video: Video) {
        self.video = video
        resource.addObserver(store)

        player = AVPlayer()
    }

    var body: some View {
        VStack {
            #if os(tvOS)
                if store.item == nil {
                    VideoLoading(video: video)
                }
            #endif

            VStack {
                Player(video: video)
                    .frame(alignment: .leading)

                #if !os(tvOS)
                    ScrollView(.vertical) {
                        VStack(alignment: .leading) {
                            Text(video.title)
                            Text(video.author)
                        }
                        .frame(minWidth: 0, maxWidth: .infinity, alignment: .leading)
                    }
                #endif
            }
        }
        .onAppear {
            resource.loadIfNeeded()
        }
        .onDisappear {
            resource.removeObservers(ownedBy: store)
            resource.invalidate()

            navigationState.showingVideoDetails = navigationState.returnToDetails
        }
        #if os(tvOS)
            .background(.thinMaterial)
        #elseif os(macOS)
            .navigationTitle(video.title)
        #elseif os(iOS)
            .navigationBarTitle(video.title, displayMode: .inline)
        #endif
    }
}