import SafariServices.SFSafariApplication

private let logger = USLogger(#fileID)

class ViewController: NSViewController {

	@IBOutlet var appName: NSTextField!
	@IBOutlet var saveLocation: NSTextField!
	@IBOutlet weak var enabledText: NSTextField!
	@IBOutlet weak var enabledIcon: NSView!
	@IBOutlet weak var openButton: NSButton!

	let appVersion = Bundle.main.infoDictionary?["CFBundleShortVersionString"] as? String ?? "??"
	let buildNumber = Bundle.main.infoDictionary?["CFBundleVersion"] as? String ?? "??"

	override func viewDidLoad() {
		super.viewDidLoad()
		self.appName.stringValue = "Userscripts Safari Version \(appVersion) (\(buildNumber))"
		setExtensionState()
		NotificationCenter.default.addObserver(
			self,
			selector: #selector(setExtensionState),
			name: NSApplication.didBecomeActiveNotification,
			object: nil
		)
		let url = getSaveLocationURL()
		self.saveLocation.stringValue = url.absoluteString
		self.saveLocation.toolTip = url.absoluteString
		if #available(macOS 13, *) {
			self.openButton.title = "Open Safari Settings"
		}
	}

	@objc func setExtensionState() {
		SFSafariExtensionManager.getStateOfSafariExtension(withIdentifier: extIdentifier) { (state, error) in
			guard let state = state else {
				self.enabledText.stringValue = "Safari Extension State Unknown"
				if let error = error {
					logger?.error("\(#function, privacy: .public) - \(error, privacy: .public)")
				} else {
					logger?.error("\(#function, privacy: .public) - couldn't get safari extension state in containing app")
				}
				return
			}
			DispatchQueue.main.async {
				self.enabledIcon.layer?.backgroundColor = state.isEnabled ? NSColor.green.cgColor : NSColor.red.cgColor
				self.enabledText.stringValue = state.isEnabled ? "Safari Extension Enabled" : "Safari Extension Disabled"
			}
		}
	}

	@IBAction func changeSaveLocation(_ sender: AnyObject?) {
		guard let window = self.view.window else { return }
		let saveLocationURL = getSaveLocationURL()
		let panel = changeSaveLocationPanel(directoryURL: saveLocationURL)
		panel.beginSheetModal(for: window, completionHandler: { response in
			// check if clicked open button and there is a valid result
			guard response == .OK, let url: URL = panel.urls.first else { return }
			// revoke implicitly starts security-scoped access
			defer { url.stopAccessingSecurityScopedResource() }
			// check if path has indeed changed
			if url.absoluteString == saveLocationURL.absoluteString { return }
			// try set new save location path to bookmark
			guard setSaveLocationURL(url: url) else { return }
			// update user interface text display
			self.saveLocation.stringValue = url.absoluteString
			self.saveLocation.toolTip = url.absoluteString
			// notify browser extension of relevant updates
			sendExtensionMessage(
				name: "SAVE_LOCATION_CHANGED",
				userInfo: [
					"saveLocation": url.absoluteString.removingPercentEncoding ?? url.absoluteString,
					"returnApp": true
				]
			)
		})
	}

	@IBAction func openSafariExtensionPreferences(_ sender: AnyObject?) {
		SFSafariApplication.showPreferencesForExtension(withIdentifier: extIdentifier)
	}
}