//
//  ViewController.swift
//  iOSMikrofon
//
//  Created by Michael Wilhelm on 1/05/2016.
//  Copyright © 2016 Michael Wilhelm. All rights reserved.
//

import UIKit
import AVFoundation
import MediaPlayer

class ViewController: UIViewController, AVAudioPlayerDelegate, AVAudioRecorderDelegate{
    
    // uiAttribute
    // globale Variablen
    var avAudioPlayer : AVAudioPlayer?
    var avAudioRecorder : AVAudioRecorder?
    
    @IBOutlet var bnStartRecord: UIButton!
    @IBOutlet var bnStop: UIButton!
    @IBOutlet var bnPlay: UIButton!
    
    @IBOutlet var labelStatus: UILabel!
    
    // uiEvents
    @IBAction func bnStartRecordClick(sender: UIButton) {
        if avAudioRecorder?.recording == false {
            bnStartRecord.enabled = false
            bnStop.enabled = true
            avAudioRecorder?.record()
            labelStatus.text = "Aufnahme läuft..."
        }  // if
    }
    @IBAction func bnStopClick(sender: UIButton) {
        bnStartRecord.enabled = true
        bnStop.enabled = false
        bnPlay.enabled = true
        if avAudioRecorder?.recording == true {
            avAudioRecorder?.stop()
            labelStatus.text = "Aufnahme beendet..."
        }
        else {
            avAudioPlayer?.stop()
            labelStatus.text = "Wiedergabe beendet..."
        }
    }
    @IBAction func bnPlayClick(sender: UIButton) {
        if avAudioRecorder?.recording == false {
            bnStartRecord.enabled = false
            bnStop.enabled = true
            bnPlay.enabled = false
            labelStatus.text = "Wiedergabe läuft..."
            do {
                avAudioPlayer = try AVAudioPlayer(contentsOfURL: (avAudioRecorder?.url)!)
                avAudioPlayer?.play()
            }
            catch {
                print("Fehler bei der Wiedergabe")
            }
        }
    }
    
    
    
    private func getPathFilename() -> String {
        let paths = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)
        if let path = paths.first {
            return path+"/sound.caf"
        }
        else {
            return ""
        }
    }
    


    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
        bnStartRecord.enabled = true
        bnStop.enabled = false
        bnPlay.enabled = false
        
        avAudioPlayer?.delegate = self
        avAudioRecorder?.delegate = self
        
        let soundFilePath = getPathFilename()
        let soundFileURL = NSURL(fileURLWithPath: soundFilePath)
        let recordSettings =
        [AVEncoderAudioQualityKey: AVAudioQuality.Min.rawValue,
            AVEncoderBitRateKey: 16,
            AVNumberOfChannelsKey: 2,
            AVSampleRateKey: 44100.0]
        
        let audioSession = AVAudioSession.sharedInstance()
        do {
            try
                audioSession.setCategory(AVAudioSessionCategoryPlayAndRecord)
        } catch {
            print("Fehler bei der Initialisierung")
        }
        
        do {
            try
                avAudioRecorder = AVAudioRecorder(
                    URL: soundFileURL, 
                    settings: recordSettings as! [String: AnyObject])
            avAudioRecorder?.prepareToRecord()
        } catch {
            print("Fehler bei der Initialisierung(2)")
        }
        

    }  // Did Load
    
    // delegate Methoden
    func audioPlayerDidFinishPlaying(player: AVAudioPlayer!, successfully flag: Bool) {
            print("Wiedergabe beendet")
            labelStatus.text = "Wiedergabe beendet..."
    }
    
    func audioPlayerDecodeErrorDidOccur(player: AVAudioPlayer!, error: NSError!) {
            print("Ein Fehler ist während der Wiedergabe aufgetreten")
    }
    
    func audioRecorderDidFinishPlaying( player: AVAudioRecorder!, successfully flag: Bool) {
            print("Aufnahme beendet")
            labelStatus.text = " Aufnahme beendet..."
    }
    
    func audioRecorderDecodeErrorDidOccur( player: AVAudioRecorder!, error: NSError!) {
            print("Ein Fehler ist während der Aufnahme aufgetreten")
    }
    


    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }


}