// The player: an HLS address, played by the platform's player through the WAI native sink. The
// sink verifies each playlist against its receipt and each object against the hash its name
// states, withholds what does not verify, signs an acknowledgement of everything received, and,
// when the session ends, a bundle the stream's owner verifies.
import AVKit
import SwiftUI
import WaiSink

struct PlayerApp: App {
    var body: some Scene {
        WindowGroup("WAI player") { PlayerView() }
    }
}

struct PlayerView: View {
    @State private var address = "http://127.0.0.1:8080/package/hls/classic/floor-v.m3u8"
    @State private var player: AVPlayer?
    @State private var session: WaiPlayerSession?
    @State private var status = "Give an HLS address and press Play."

    var body: some View {
        VStack(alignment: .leading, spacing: 12) {
            HStack {
                TextField("HLS address", text: $address).textFieldStyle(.roundedBorder)
                Button("Play", action: play)
            }
            VideoPlayer(player: player).frame(minWidth: 480, minHeight: 270)
            Text(status).font(.callout).foregroundStyle(.secondary)
        }
        .padding()
    }

    private func play() {
        guard let url = URL(string: address) else { status = "Not an address."; return }
        do {
            // The owner is the key of the collector the bundle is meant for; this player keeps it.
            let config = WaiSink.Config(channel: "my-channel", owner: String(repeating: "0", count: 64))
            let s = try WaiPlayerSession(url: url, config: config, attention: WaiFixedAttention())
            s.onEnd = { bundle, ended in
                status = "Ended (\(ended.rawValue)): a signed bundle of \(bundle.count) bytes."
            }
            s.start()
            session = s
            player = s.player
            status = "Playing through the sink."
        } catch {
            status = "The sink refused: \(error)"
        }
    }
}