import UIKit
import AVFoundation


class ViewController: UIViewController, UINavigationControllerDelegate, UIImagePickerControllerDelegate {


@IBOutlet weak var previewView: UIView!

@IBOutlet weak var capturedImage: UIImageView!


var manager: OneShotLocationManager?

let captureSession = AVCaptureSession()
var captureDevice: AVCaptureDevice?
var stillImageOutput: AVCaptureStillImageOutput?
var previewLayer = AVCaptureVideoPreviewLayer()


override func viewWillAppear(animated: Bool) {

    // set view background color
    view.backgroundColor = (UIColor.blackColor())
    NSUserDefaults.standardUserDefaults().setObject("black", forKey: "backColor")
    NSUserDefaults.standardUserDefaults().synchronize()



    captureSession.sessionPreset = AVCaptureSessionPresetHigh

    let devices = AVCaptureDevice.devices()

    for device in devices {
        if (device.hasMediaType(AVMediaTypeVideo)) {
            if(device.position == AVCaptureDevicePosition.Back) {
                captureDevice = device as? AVCaptureDevice
            }
        }
    }

    if captureDevice != nil {
        beginSession()
    }
}


override func viewDidLoad() {
    super.viewDidLoad()
}


func beginSession() {
    do {
        let input = try AVCaptureDeviceInput(device: captureDevice)
        captureSession.addInput(input)
    } catch let error as NSError {
        print(error)
    }

    stillImageOutput = AVCaptureStillImageOutput()
    stillImageOutput!.outputSettings = [AVVideoCodecKey: AVVideoCodecJPEG]
    captureSession.addOutput(stillImageOutput)

    previewLayer = AVCaptureVideoPreviewLayer(session: captureSession)
    previewView.layer.addSublayer(previewLayer)
    previewLayer.frame = previewView.bounds




    captureSession.startRunning()

}

@IBAction func didPressTakePhoto(sender: UIButton) {
    if let videoConnection = stillImageOutput!.connectionWithMediaType(AVMediaTypeVideo) {
        videoConnection.videoOrientation = AVCaptureVideoOrientation.Portrait
        stillImageOutput?.captureStillImageAsynchronouslyFromConnection(videoConnection, completionHandler: {(sampleBuffer, error) in
            if(sampleBuffer != nil) {
                let imageData = AVCaptureStillImageOutput.jpegStillImageNSDataRepresentation(sampleBuffer)
                let dataProvider = CGDataProviderCreateWithCFData(imageData)
                var decode: CGFloat = 0
                let cgImageRef = CGImageCreateWithJPEGDataProvider(dataProvider, &decode, true, CGColorRenderingIntent.RenderingIntentDefault)



                let image = UIImage(CGImage: cgImageRef!, scale: 1.0, orientation: UIImageOrientation.Right)
                self.capturedImage.image = image
            }
        })
    }
}