#if os(iOS)
import ActivityKit
import Foundation

/// The attributes of the Live Activity that surfaces the recording flow on the Lock Screen and in the Dynamic Island.
///
/// The attributes carry no static content: everything the activity shows lives in its ``ContentState``, which the app's reporting
/// service updates on every transition of the recording flow. The type is shared between the app — which starts, updates, and
/// ends the activity — and the widget extension — which renders it.
public struct RecordingActivityAttributes: ActivityAttributes {

    // MARK: Initializers

    /// Creates the attributes of the Live Activity of a recording flow.
    public init() {}

    // MARK: Content state

    /// The dynamic content of the Live Activity, updated on every transition of the recording flow.
    public struct ContentState: Codable, Hashable, Sendable {

        // MARK: Properties

        /// The current state of the recording flow.
        public var state: RecordingActivityState

        /// The instant the elapsed recording time counts from — moved back by the time already spent recording, so a timer
        /// counting up from it shows the elapsed recording time — or `nil` while the recording is not running.
        public var anchor: Date?

        /// The number of seconds spent recording up to the last transition, excluding any time spent paused, shown as a frozen
        /// elapsed time while the recording is not running.
        public var elapsed: TimeInterval

        // MARK: Initializers

        /// Creates the dynamic content of the Live Activity of a recording flow.
        ///
        /// - Parameters:
        ///   - state: The current state of the recording flow.
        ///   - anchor: The instant the elapsed recording time counts from, or `nil` while the recording is not running.
        ///   - elapsed: The number of seconds spent recording up to the last transition, excluding any time spent paused.
        public init(
            state: RecordingActivityState,
            anchor: Date?,
            elapsed: TimeInterval
        ) {
            self.state = state
            self.anchor = anchor
            self.elapsed = elapsed
        }

    }

}
#endif