//
//  TimerModule.swift
//  Werkout_ios
//
//  Created by Trey Tartt on 6/14/23.
//

import Foundation

class BridgeModule: ObservableObject {
    static let shared = BridgeModule()
    @Published var isShowingOnExternalDisplay = false
    
    private var timer: Timer?
    @Published var timeLeft: Int = 0
    
    var timerCompleted: (() -> Void)?
    @Published var currentExercise: ExerciseElement?
    @Published var currentWorkout: Workout?
    @Published var currentExerciseIdx: Int = -1
    
    private func startTimerWith(duration: Int) {
        timer?.invalidate()
        timer = nil
        timeLeft = duration
        timer = Timer.scheduledTimer(timeInterval: 1,
                                     target: self,
                                     selector: #selector(updateCounter),
                                     userInfo: nil,
                                     repeats: true)
        timer?.fire()
    }
    
    @objc func updateCounter() {
        if timeLeft > 0 {
            timeLeft -= 1
        } else {
            timer?.invalidate()
            timer = nil
            timerCompleted?()
        }
    }
    
    func updateCurrent(workout: Workout) {
        self.currentWorkout = workout
    }
    
    func updateCurrent(exercise: ExerciseElement) {
        self.currentExercise = exercise
        
        if let duration = exercise.duration {
            startTimerWith(duration: duration)
        }
    }
}