//
//  WorkoutCoordinator.swift
//  Keging
//
//  엔진 ↔ 진동·Live Activity·백그라운드 오디오·화면 꺼짐 방지 배선 (iOS)
//

import UIKit

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

    private var wired = false

    private init() {}

    func wire() {
        guard !wired else { return }
        wired = true

        LiveActivityManager.shared.cleanupStaleActivities()

        let engine = KegelEngine.shared
        engine.onPhaseChange = { [weak engine] phase, rep, phaseEnd in
            guard let engine else { return }
            let config = engine.config
            switch phase {
            case .prepare: break  // 준비는 무진동 — 첫 수축 진동이 시작 신호
            case .contract: Haptics.play(config.contractPattern)
            case .relax: Haptics.play(config.relaxPattern)
            }
            LiveActivityManager.shared.sync(phase: phase, rep: rep, totalReps: config.reps, phaseEnd: phaseEnd)
        }
        engine.onSessionEnd = { completed, record in
            LiveActivityManager.shared.end()
            BackgroundAudioKeeper.shared.stop()
            UIApplication.shared.isIdleTimerDisabled = false
            if completed, let record {
                let config = SettingsStore.shared.config
                HealthRecorder.shared.save(
                    record: record,
                    effortScore: config.effortScore,
                    workoutType: config.healthWorkoutType
                )
            }
        }
    }

    func startWorkout() {
        guard !KegelEngine.shared.isRunning else { return }
        HealthRecorder.shared.requestAuthorizationIfNeeded()
        BackgroundAudioKeeper.shared.start()
        UIApplication.shared.isIdleTimerDisabled = true
        KegelEngine.shared.start(config: SettingsStore.shared.config)
    }
}