import OpenTok
import AVFoundation
import AudioToolbox // Required if you want vibration

class AudioDeviceRingtone: OTDefaultAudioDevice, AVAudioPlayerDelegate {
    
    // MARK: - Properties
    private var audioPlayer: AVAudioPlayer?
    private var vibratesWithRingtone: Bool = false
    private var vibrateTimer: Timer?
    private let vibrateFrequencySeconds: TimeInterval = 1.0
    private var ringtoneURL: URL?
    /**
     * This property is only needed later, because we can't always do as requested immediately. 
     * We are defering incoming callbacks from OTAudioBus until we aren't playing anything back
     * (check the sample app for details)
     */
    private var deferredCallbacks: [String] = [] 

    // MARK: - Initialization
    init(ringtone url: URL) {
        self.ringtoneURL = url
        super.init()
    }
    
    // MARK: - Helper: Vibrate Logic
    @objc private func buzz(_ timer: Timer) {
        if vibratesWithRingtone {
            AudioServicesPlaySystemSound(kSystemSoundID_Vibrate)
        }
    }
}