import imageSource = require("image-source");

import frame = require("ui/frame");

class UIImagePickerControllerDelegateImpl extends NSObject implements UIImagePickerControllerDelegate {

public static ObjCProtocols = [UIImagePickerControllerDelegate];

static new(): UIImagePickerControllerDelegateImpl {

return <UIImagePickerControllerDelegateImpl>super.new();

}

private _callback: (result?: imageSource.ImageSource) => void;

public initWithCallback(callback: (result?: imageSource.ImageSource) => void): UIImagePickerControllerDelegateImpl {

this._callback = callback;

return this;

}

imagePickerControllerDidFinishPickingMediaWithInfo(picker, info): void {

if (info) {

var source = info.valueForKey(UIImagePickerControllerOriginalImage);

if (source) {

var image = imageSource.fromNativeSource(source);

if (this._callback) {

this._callback(image);

}

}

}

picker.presentingViewController.dismissViewControllerAnimatedCompletion(true, null);

}

imagePickerControllerDidCancel(picker): void {

picker.presentingViewController.dismissViewControllerAnimatedCompletion(true, null);

}

}

export var takePicture = function (): Promise<imageSource.ImageSource> {

return new Promise<imageSource.ImageSource>((resolve, reject) => {

var imagePickerController = new UIImagePickerController();

var listener = UIImagePickerControllerDelegateImpl.new().initWithCallback(resolve);

imagePickerController.delegate = listener;

if (UIDevice.currentDevice().model !== "iPhone Simulator") {

// UIImagePickerControllerSourceType.UIImagePickerControllerSourceTypeCamera is not available in emulators!

imagePickerController.mediaTypes = UIImagePickerController.availableMediaTypesForSourceType(UIImagePickerControllerSourceType.UIImagePickerControllerSourceTypeCamera);

imagePickerController.sourceType = UIImagePickerControllerSourceType.UIImagePickerControllerSourceTypeCamera;

}

imagePickerController.modalPresentationStyle = UIModalPresentationStyle.UIModalPresentationCurrentContext;

var topMostFrame = frame.topmost();

if (topMostFrame) {

var viewController: UIViewController = topMostFrame.currentPage && topMostFrame.currentPage.ios;

if (viewController) {

viewController.presentModalViewControllerAnimated(imagePickerController, true);

}

}

});

}