//
//  OnboardingViewController.swift
//  Tusker
//
//  Created by Shadowfacts on 8/18/18.
//  Copyright © 2018 Shadowfacts. All rights reserved.
//

import UIKit
import AuthenticationServices

protocol OnboardingViewControllerDelegate {
    
    func didFinishOnboarding()
    
}

class OnboardingViewController: UIViewController {

    var delegate: OnboardingViewControllerDelegate?
    
    @IBOutlet weak var urlTextField: UITextField!
    
    var authenticationSession: ASWebAuthenticationSession?
    
    override func viewDidLoad() {
        super.viewDidLoad()
    }
    
    @IBAction func loginPressed(_ sender: Any) {
        guard let text = urlTextField.text,
            var components = URLComponents(string: text) else { return }
        
        LocalData.shared.instanceURL = text
        MastodonController.shared.createClient {
            let clientID = LocalData.shared.clientID!
            
            let callbackURL = "tusker://oauth"
            
            components.path = "/oauth/authorize"
            components.queryItems = [
                URLQueryItem(name: "client_id", value: clientID),
                URLQueryItem(name: "response_type", value: "code"),
                URLQueryItem(name: "scope", value: "read write follow"),
                URLQueryItem(name: "redirect_uri", value: callbackURL)
            ]
            let url = components.url!
            
            print("oauth url: \(url)")
            
            DispatchQueue.main.async {
                self.delegate?.didFinishOnboarding()
                UIApplication.shared.open(url, options: [:], completionHandler: nil)
            }
            
//            self.delegate?.didFinishOnboarding()
//            self.authenticationSession = ASWebAuthenticationSession(url: url, callbackURLScheme: callbackURL) { url, error in
//                guard error == nil,
//                    let url = url,
//                    let components = URLComponents(url: url, resolvingAgainstBaseURL: true) else { fatalError() }
//
//                print("callback url: \(url)")
//
//                let item = components.queryItems?.first { $0.name == "code" }
//                if let accessToken = item?.value {
//                    LocalData.shared.accessToken = accessToken
//                    MastodonController.shared.client.accessToken = accessToken
//                    self.delegate?.didFinishOnboarding()
//                    self.authenticationSession = nil
//                }
//            }
//            self.authenticationSession!.start()
        }
    }
    
    @IBAction func clearDataPressed(_ sender: Any) {
        LocalData.shared.instanceURL = nil
        LocalData.shared.clientID = nil
        LocalData.shared.clientSecret = nil
        LocalData.shared.refreshToken = nil
    }
    
    /*
    // MARK: - Navigation

    // In a storyboard-based application, you will often want to do a little preparation before navigation
    override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
        // Get the new view controller using segue.destination.
        // Pass the selected object to the new view controller.
    }
    */

}