//
//  BrowserViewController+Keyboard.swift
//  App
//
//  Created by James Magahern on 2/17/21.
//

import Foundation

extension BrowserViewController: ShortcutResponder
{
    internal func updateCommandKeyState(forPresses presses: Set<UIPress>) {
        guard let press = presses.first else { return }
        
        if let key = press.key {
            if key.modifierFlags == [.command] {
                let isDown = press.phase == .began || press.phase == .changed || press.phase == .stationary
                self.commandKeyHeld = isDown
            }
        }
    }
    
    override func pressesBegan(_ presses: Set<UIPress>, with event: UIPressesEvent?) {
        super.pressesBegan(presses, with: event)
        updateCommandKeyState(forPresses: presses)
    }
    
    override func pressesCancelled(_ presses: Set<UIPress>, with event: UIPressesEvent?) {
        super.pressesCancelled(presses, with: event)
        updateCommandKeyState(forPresses: presses)
    }
    
    override func pressesEnded(_ presses: Set<UIPress>, with event: UIPressesEvent?) {
        super.pressesEnded(presses, with: event)
        updateCommandKeyState(forPresses: presses)
    }

    // MARK: Keyboard Shortcuts
    
    func focusURLBar(_ sender: Any?) {
        toolbarController.urlBar.textField.becomeFirstResponder()
    }
    
    func goBack(_ sender: Any?) {
        tab.webView.goBack()
    }
    
    func goForward(_ sender: Any?) {
        tab.webView.goForward()
    }
    
    func createTab(_ sender: Any?) {
        createNewTab(withURL: nil)
    }
    
    func previousTab(_ sender: Any?) {
        if let tabIndex = tabController.tabs.firstIndex(of: self.tab) {
            if tabIndex - 1 >= 0 {
                self.tab = tabController.tabs[tabIndex - 1]
            }
        }
    }
    
    func nextTab(_ sender: Any?) {
        if let tabIndex = tabController.tabs.firstIndex(of: self.tab) {
            if tabIndex + 1 < tabController.tabs.count {
                self.tab = tabController.tabs[tabIndex + 1]
            }
        }
    }
    
    func closeTab(_ sender: Any?) {
        if tabController.tabs.count > 1 {
            tabController.closeTab(self.tab)
        } else {
            #if targetEnvironment(macCatalyst)
            if let originWindowScene = self.view.window?.windowScene {
                UIApplication.shared.requestSceneSessionDestruction(originWindowScene.session, options: nil) { error in
                    print("Error when requesting scene destruction: " + error.localizedDescription)
                }
            }
            #endif
        }
    }
    
    func findOnPage(_ sender: Any?) {
        browserView.setFindOnPageVisible(true, animated: true)
        findOnPageController.findOnPageView.textField.becomeFirstResponder()
    }
    
    func refresh(_ sender: Any?) {
        webView.reload()
    }
    
    override func increaseSize(_ sender: Any?) {
        tab.webView._viewScale += 0.10
    }
    
    override func decreaseSize(_ sender: Any?) {
        tab.webView._viewScale -= 0.10
    }

}