import Foundation

/// The three data classes the system keeps strictly separated, each with its own
/// storage root, sharing policy, and trust boundary:
///
/// - `.tvanarchy` — app/mesh metadata that is NOT private: cover art, and the
///   canonical shared catalog ("media definitions" like the Matrix collection).
///   Shareable across the mesh (signed by anchors); safe to replicate publicly
///   within an install.
/// - `.user` — the person's PRIVATE data: their library index (what they have),
///   watch history + resume positions, playlists, play queue, device config,
///   settings, franchise/track prefs. Never shared with friends; syncs only across
///   the user's OWN devices (their install).
/// - `.publicMedia` — the bulk media files themselves (torrent downloads).
///   Swarm-distributed; this is what the upload-bandwidth tiers arbitrate over.
public enum DataDomain: String, Sendable, CaseIterable {
    case tvanarchy
    case user
    case publicMedia

    /// Whether this domain may leave the user's own install (be shared with friends /
    /// the public mesh). Only catalog/art and the media swarm; never user-private data.
    public var shareableBeyondOwnFleet: Bool {
        switch self {
        case .tvanarchy:   true     // signed catalog + art
        case .user:        false    // private — own install only
        case .publicMedia: true     // the swarm
        }
    }

    /// Classify a state/config store by its filename or path. Defaults to `.user`
    /// (the safe default: treat unknown app state as PRIVATE, never accidentally
    /// shareable).
    public static func classify(path: String) -> DataDomain {
        let p = (path as NSString).lastPathComponent.lowercased()
        let full = path.lowercased()
        // Media files (the public swarm) — under a media root or the offline cache.
        if full.contains("/media/") || full.contains("/bigdisk") || full.contains("tv-anarchy-offline") {
            return .publicMedia
        }
        // Shareable app/mesh metadata: artwork + the (future) canonical catalog.
        if full.contains("/posters/") || full.contains("/previews/")
            || full.contains("/meta/") || p == "catalog.json" {
            return .tvanarchy
        }
        // Everything else the app persists is the user's private data.
        return .user
    }
}