//
//  LiveActivityManager.swift
//  Keging
//
//  다이나믹 아일랜드 Live Activity — 현재 횟수·수축/이완 국면 표시
//

import ActivityKit
import Foundation

@MainActor
final class LiveActivityManager {
    static let shared = LiveActivityManager()

    private var activity: Activity<KegingActivityAttributes>?

    private init() {}

    func start(totalReps: Int, phase: KegelPhase, rep: Int, phaseEnd: Date) {
        guard ActivityAuthorizationInfo().areActivitiesEnabled else { return }
        end()
        let state = KegingActivityAttributes.ContentState(
            phase: phase, rep: rep, totalReps: totalReps,
            phaseStart: Date(), phaseEnd: phaseEnd
        )
        activity = try? Activity.request(
            attributes: KegingActivityAttributes(startedAt: Date()),
            content: ActivityContent(state: state, staleDate: nil)
        )
    }

    func update(phase: KegelPhase, rep: Int, totalReps: Int, phaseEnd: Date) {
        guard let activity else { return }
        let state = KegingActivityAttributes.ContentState(
            phase: phase, rep: rep, totalReps: totalReps,
            phaseStart: Date(), phaseEnd: phaseEnd
        )
        Task { await activity.update(ActivityContent(state: state, staleDate: nil)) }
    }

    func end() {
        guard let activity else { return }
        self.activity = nil
        Task { await activity.end(nil, dismissalPolicy: .immediate) }
    }
}