import Foundation

/// A push notification as the app reads it.
///
/// `instance` and `user` name the account the notice belongs to. One
/// device token is one install, and an install registers against every
/// account signed in on it, so `path` alone is ambiguous — two
/// instances can hold the same `owner/name`.
nonisolated struct PushPayload: Equatable, Sendable {
    let instance: URL
    let user: String
    let path: String
    /// The recipient's unread count, for the app icon badge. Absent on
    /// a notification from a server that predates it.
    let badge: Int

    init?(userInfo: [AnyHashable: Any]) {
        guard let raw = userInfo["instance"] as? String,
              let instance = URL(string: raw), instance.scheme != nil,
              let user = userInfo["user"] as? String, !user.isEmpty,
              let path = userInfo["path"] as? String, !path.isEmpty
        else { return nil }
        self.instance = instance
        self.user = user
        self.path = path
        self.badge = (userInfo["aps"] as? [AnyHashable: Any])?["badge"] as? Int ?? 0
    }
}