//
//  ScreenshotListWindowController.swift
//  KCD
//
//  Created by Hori,Masaki on 2016/12/31.
//  Copyright © 2016年 Hori,Masaki. All rights reserved.
//

import Cocoa

final class ScreenshotListWindowController: NSWindowController {
    
    @IBOutlet weak var shareButton: NSButton!
    @IBOutlet var rightController: NSViewController!
    @IBOutlet weak var left: NSView!
    @IBOutlet weak var right: NSView!
    
    private lazy var detailViewController: ScreenshotDetailViewController = {
        return ScreenshotDetailViewController()
    }()
    private var editorViewController: ScreenshotEditorViewController = {
            return ScreenshotEditorViewController()
    }()
    private var viewControllers: [NSViewController] = []
    private weak var currentRightViewController: BridgeViewController?
    private lazy var listViewController: ScreenshotListViewController = {
            return ScreenshotListViewController()
    }()
    
    @objc var filterPredicate: NSPredicate? = nil {
        
        didSet {
            listViewController.screenshots.filterPredicate = filterPredicate
        }
    }
    
    override var windowNibName: NSNib.Name {
        
        return .nibName(instanceOf: self)
    }
    
    override func windowDidLoad() {
        
        super.windowDidLoad()
        
        viewControllers.append(listViewController)
        replaceView(left, viewController: listViewController)
        listViewController.representedObject = listViewController.screenshots
        
        viewControllers.append(detailViewController)
        rightController.addChildViewController(detailViewController)
        replaceView(right, viewController: detailViewController)
        detailViewController.representedObject = listViewController.screenshots
        
        rightController.addChildViewController(editorViewController)
        // force load view.
        _ = editorViewController.view
        editorViewController.representedObject = listViewController.screenshots
        
        currentRightViewController = detailViewController
        
        shareButton.sendAction(on: [.leftMouseDown])
    }
    
    func replaceView(_ view: NSView, viewController: NSViewController) {
        
        viewController.view.frame = view.frame
        viewController.view.setFrameOrigin(.zero)
        viewController.view.autoresizingMask = view.autoresizingMask
        view.addSubview(viewController.view)
    }
    
    func registerScreenshot(_ image: NSBitmapImageRep, fromOnScreen: NSRect) {
        
        listViewController.registerScreenshot(image, fromOnScreen: fromOnScreen)
    }
    
    @IBAction func share(_ sender: AnyObject?) {
        
        currentRightViewController?.share(sender)
    }
    
    @IBAction func changeToEditor(_ sender: AnyObject?) {
        
        rightController.transition(from: detailViewController,
                                   to: editorViewController,
                                   options: [.slideLeft],
                                   completionHandler: nil)
        currentRightViewController = editorViewController
    }
    
    @IBAction func changeToDetail(_ sender: AnyObject?) {
        
        rightController.transition(from: editorViewController,
                                   to: detailViewController,
                                   options: [.slideRight],
                                   completionHandler: nil)
        currentRightViewController = detailViewController
    }
}

extension ScreenshotListWindowController: NSSharingServicePickerDelegate {
    
    func sharingServicePicker(_ sharingServicePicker: NSSharingServicePicker,
                              delegateFor sharingService: NSSharingService) -> NSSharingServiceDelegate? {
        
        return currentRightViewController
    }
}

extension ScreenshotListWindowController: NSSplitViewDelegate {
    
    private static let leftMinWidth: CGFloat = 299
    private static let rightMinWidth: CGFloat = 400
    
    func splitView(_ splitView: NSSplitView,
                   constrainMinCoordinate proposedMinimumPosition: CGFloat,
                   ofSubviewAt dividerIndex: Int) -> CGFloat {
        
        if dividerIndex == 0 { return ScreenshotListWindowController.leftMinWidth }
        
        return proposedMinimumPosition
    }
    
    func splitView(_ splitView: NSSplitView,
                   constrainSplitPosition proposedPosition: CGFloat,
                   ofSubviewAt dividerIndex: Int) -> CGFloat {
        
        if dividerIndex == 0 {
            
            let rightWidth = splitView.frame.size.width - proposedPosition
            
            if rightWidth < ScreenshotListWindowController.rightMinWidth {
                
                return splitView.frame.size.width - ScreenshotListWindowController.rightMinWidth
            }
        }
        
        return proposedPosition
    }
    
    func splitView(_ splitView: NSSplitView, resizeSubviewsWithOldSize oldSize: NSSize) {
        
        splitView.adjustSubviews()
        
        let leftView = splitView.subviews[0]
        let rightView = splitView.subviews[1]
        
        if leftView.frame.width < ScreenshotListWindowController.leftMinWidth {
            
            var leftRect = leftView.frame
            leftRect.size.width = ScreenshotListWindowController.leftMinWidth
            leftView.frame = leftRect
            
            var rightRect = rightView.frame
            rightRect.size.width = splitView.frame.width - leftRect.width - splitView.dividerThickness
            rightRect.origin.x = leftRect.width + splitView.dividerThickness
            rightView.frame = rightRect
        }
    }
    
    func splitView(_ splitView: NSSplitView, shouldAdjustSizeOfSubview view: NSView) -> Bool {
        
        let leftView = splitView.subviews[0]
        let rightView = splitView.subviews[1]
        
        if leftView == view {
            
            if leftView.frame.width < ScreenshotListWindowController.leftMinWidth { return false }
        }
        if rightView == view {
            
            if leftView.frame.width >= ScreenshotListWindowController.leftMinWidth { return false }
        }
        
        return true
    }
}

@available(OSX 10.12.2, *)
extension ScreenshotListWindowController: NSSharingServicePickerTouchBarItemDelegate {
    
    override func makeTouchBar() -> NSTouchBar? {
        
        return listViewController.touchBar
    }
    
    func items(for pickerTouchBarItem: NSSharingServicePickerTouchBarItem) -> [Any] {
        
        return currentRightViewController?.items(for: pickerTouchBarItem) ?? []
    }
}