//
//  ApplicationWindowController.swift
//  PrivadoVPN
//
//  Created by Murad Shabanov on 23.09.2021.
//  Copyright © 2021 Privado LLC. All rights reserved.
//

import Foundation

protocol AppWindow {
    var stackManager: JSViewControllersStackManager? { get }
    var controller: NSViewController? { get set }
}

extension NSWindow.FrameAutosaveName {
    static let applicationWindow: NSWindow.FrameAutosaveName = "io.privado.application.FrameAutosaveName"
}

class ApplicationWindowController: NSWindowController, AppWindow {
    
    // MARK: - AppWindow
    
    var controller: NSViewController?
    
    private(set) var stackManager: JSViewControllersStackManager?
    
    func show(sender: Any, relativeTo origin: CGPoint?) {
         if let window = self.window,
           let origin = origin,
           !window.isKeyWindow {
            self.restoreWindowPosition(window: window, relativeTo: origin)
        }
        self.showWindow(sender)
    }
    
    func save() {
        UserSettings.shared.isDocked = false
    }
    
    // MARK: - Initializers
    
    convenience init(size: NSSize) {
                
        let window = ApplicationWindow(contentRect: NSRect(origin: .zero, size: size),
                                       styleMask: [ .titled, .closable, .miniaturizable],
                                       backing: .buffered,
                                       defer: true)
        
        self.init(window: window)

        let applicationView = ApplicationView(frame: NSRect(origin: .zero, size: size))
        
        applicationView.wantsLayer = true
        
        applicationView.layer?.cornerRadius = 5
        
        let controller = JSNavigationController(rootViewController: EmptyViewController(),
                                                viewDelegate: applicationView)
        controller.preferredContentSize = size
        controller.view.autoresizesSubviews = true
        controller.view.addSubview(applicationView)

        NSLayoutConstraint.activate([
            applicationView.widthAnchor.constraint(equalToConstant: PrivadoConstants.Window.sizeWidth),
            applicationView.heightAnchor.constraint(equalToConstant: PrivadoConstants.Window.sizeHeight)
        ])
        
        window.titlebarAppearsTransparent = true
        window.styleMask.insert(.fullSizeContentView)
        
        window.contentViewController = controller
        window.isOpaque = true
        window.backgroundColor = .clear
        window.makeKey()
        window.becomeMain()
        
        
        self.controller = controller
        self.stackManager = controller
    }
    
    convenience init(size: NSSize, controller: NSViewController) {
        
        let window = ApplicationWindow(contentRect: NSRect(origin: .zero, size: size),
                                       styleMask: [.titled, .closable, .miniaturizable],
                                       backing: .buffered,
                                       defer: true)
        
        
        controller.view.wantsLayer = true
        controller.view.layer?.cornerRadius = 5
        
        self.init(window: window)
        self.controller = controller
        self.stackManager = controller as? JSViewControllersStackManager
        
        window.contentViewController = controller
        window.titlebarAppearsTransparent = true
        window.styleMask.insert(.fullSizeContentView)
        window.makeKey()
        window.becomeMain()
    }
    
    override init(window: NSWindow?) {
        super.init(window: window)
    }
    
    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    // MARK: - Private
    
    private func restoreWindowPosition(window: NSWindow, relativeTo origin: CGPoint) {
        
        let frame = window.frame
        window.setFrameTopLeftPoint(NSPoint(x: origin.x - frame.size.width / 2, y: origin.y - 30))
        
        // window.setFrameUsingName(.applicationWindow)
        // window.setFrameAutosaveName(.applicationWindow)
    }
}