/*

 Copyright (C) 2016 Apple Inc. All Rights Reserved.

 See LICENSE.txt for this sample’s licensing information

 Abstract:

 Manages the UI for selecting and previewing effects and creates a new image when the button is clicked.

 */

import Cocoa

class EffectsAccessoryViewController: NSTitlebarAccessoryViewController, PhotoControllerConsumer {

    @IBOutlet weak var effectSelectionPopUp: NSPopUpButton!

    @IBOutlet weak var applyFilterButton: NSButton!

    var photoController: PhotoController?

    override func viewDidLoad() {

        super.viewDidLoad()

        effectSelectionPopUp.removeAllItems()

        Effect.allEffects.enumerated().forEach { index, effect in

            let item = NSMenuItem(title: effect.displayName, action: nil, keyEquivalent: "")

            item.tag = index

            effectSelectionPopUp.menu!.addItem(item)

        }

    }

    private func imageByApplying(_ filter: CIFilter, to image: NSImage) -> NSImage{

        let sourceImage = CIImage(data: image.tiffRepresentation!)

        filter.setValue(sourceImage, forKey: kCIInputImageKey)

        let outputImage = filter.outputImage!

        let result = NSImage(size: image.size)

        let imageRep = NSCIImageRep(ciImage: outputImage)

        result.addRepresentation(imageRep)

        return result

    }

    @IBAction func btnApplyClicked(_ sender: NSButton) {

        if let image = photoController?.photo.image {

            let filter = Effect.allEffects[effectSelectionPopUp.selectedTag()].createFilter()

            let newImage = imageByApplying(filter, to: image)

            photoController?.setPhotoImage(newImage)

        }

    }

}