import Intents

/// "Hey Siri, play … on Stemify". Handled in the app process, so it can start playback directly.
final class PlayMediaHandler: NSObject, INPlayMediaIntentHandling {
    func resolveMediaItems(for intent: INPlayMediaIntent) async -> [INPlayMediaMediaItemResolutionResult] {
        let q = intent.mediaSearch?.mediaName ?? intent.mediaSearch?.artistName ?? intent.mediaSearch?.albumName ?? ""
        let item = INMediaItem(identifier: "search:\(q)", title: q.isEmpty ? "Downloads" : q, type: .music, artwork: nil)
        return INPlayMediaMediaItemResolutionResult.successes(with: [item])
    }

    func handle(intent: INPlayMediaIntent) async -> INPlayMediaIntentResponse {
        let s = intent.mediaSearch
        let q = s?.mediaName ?? s?.artistName ?? s?.albumName ?? intent.mediaItems?.first?.title ?? ""
        let shuffle = intent.playShuffled == true
        let ok = await Self.play(q, shuffle)
        return INPlayMediaIntentResponse(code: ok ? .success : .failure, userActivity: nil)
    }

    @MainActor static func play(_ query: String, _ shuffle: Bool) async -> Bool {
        let g = AppGraph.shared
        do {
            guard let r = try await g.car.resolveSearch(query) else {
                g.playback.report(query.isEmpty ? "Nothing downloaded yet" : "Nothing found for “\(query)”")
                return false
            }
            g.playback.playTracks(r.tracks, start: r.start, shuffle: r.shuffle || shuffle)
            return true
        } catch {
            g.playback.report(error is NotSignedIn ? "Sign in to Plex on your phone" : "Couldn't load that: \(error.localizedDescription)")
            return false
        }
    }
}