//
//  SplashScreenViewController.swift
//  Learn Genie
//
//  Created by Suraj Kumar Mandal on 12/08/21.
//

import UIKit
import FirebaseAuth
import GoogleSignIn
import Toast_Swift
import AuthenticationServices
import SwiftUI

class SplashScreenViewController: UIViewController {
    
    @IBOutlet weak var activityIndicator: UIActivityIndicatorView!
    @IBOutlet var waitLabel: UILabel!
    
    var viewModel = SplashScreenViewModel()
    let group = DispatchGroup()
    var isWaiting = false
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        // Do any additional setup after loading the view.
        viewModel.delegate = self
        self.isWaiting = true
        //Set default language to english
        if UserDefaultsConstant.getIntValueFromUserDefults(for: Constant.languageId) == nil {
            UserDefaultsConstant.setIntValueInUserDefaults(objValue: 43, for: Constant.languageId)
            UserDefaultsConstant.setValueInUserDefaults(objValue: "en", for: Constant.languageShortName)
            UserDefaultsConstant.setValueInUserDefaults(objValue: "English", for: Constant.languageName)
        }
        //Condition for app in case of fist time launch
        if UIApplication.isFirstLaunch() {
            UserDefaults.standard.set(true, forKey: Constant.welcomeSlider)
            UserDefaults.standard.synchronize()
            UserDefaults.standard.set(true, forKey: Constant.introduction)
            UserDefaults.standard.synchronize()
        }
        firstTimeAppRun()
        
        //Animate activity indicator in 5 sec delay
        DispatchQueue.global(qos: .background).asyncAfter(deadline: .now() + 2) {
            DispatchQueue.main.async {
                self.activityIndicator.isHidden = false
                self.activityIndicator.color = .black
                self.activityIndicator.startAnimating()
            }
        }
        
//        DispatchQueue.global(qos: .background).asyncAfter(deadline: .now() + 5) {
//            DispatchQueue.main.async {
//                self.waitLabel.isHidden = false
//                self.waitLabel.text = "Downloading data, Please wait..."
////                self.activityIndicator.stopAnimating()
////                self.navigation()
//            }
//        }
        
    }
    
    override func viewWillAppear(_ animated: Bool) {
        activityIndicator.isHidden = true
        waitLabel.isHidden = true
    }
    
    func firstTimeAppRun() {
        if UserDefaults.standard.bool(forKey: Constant.welcomeSlider) {
            if Reachability.isConnectedToNetwork() {
                //callAPI()
                viewModel.generateCookie()
            }
            else {
                Alert.showInternetFailureAlert(on: self)
            }
        } else {
            DispatchQueue.global(qos: .background).asyncAfter(deadline: .now() + 5) {
                DispatchQueue.main.async {
                    self.navigation()
                }
            }
        }
    }
    
    func callAPI() {
        group.enter()
        viewModel.getRole()
        
        group.enter()
        viewModel.getLanguage()
        
        group.enter()
        viewModel.getTranslation(offset: 0)
        
        group.enter()
        viewModel.getState(offset: 0)
        
        group.enter()
        viewModel.getDistrict(offset: 0)
        
        group.enter()
        viewModel.getTopic(offset: 0)
        
        group.notify(queue: .main, execute: {
            // Step3: Update the UI
            self.isWaiting = false
            print("All API called")
            self.activityIndicator.stopAnimating()
            self.navigation()
        })
    }
    
    /*
     // 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.
     }
     */
    
}

extension SplashScreenViewController : SplashScreenViewProtocol {
    func callDataAPI() {
        self.callAPI()
    }
    
    func groupLeave() {
        group.leave()
    }

    func stopActivityIndicator() {
        activityIndicator.stopAnimating()
    }
    
    func showToastMessage(message: String) {
        self.view.makeToast(message)
    }
    
    func navigation() {
        if UserDefaults.standard.bool(forKey: Constant.welcomeSlider) {
            DispatchQueue.main.async {
                let selectLanguageVC = self.storyboard?.instantiateViewController(withIdentifier:"SelectLanguageViewController" ) as! SelectLanguageViewController
                self.navigationController?.pushViewController(selectLanguageVC, animated: true)
            }
        } else {
            if UserDefaultsConstant.getValueFromUserDefults(for: Constant.signInMethod) as! String == "google" {
                GIDSignIn.sharedInstance.restorePreviousSignIn { user, error in
                    if error != nil || user == nil {
                        // Show the app's signed-out state.
                        DispatchQueue.main.async {
                            let loginVC = self.storyboard?.instantiateViewController(withIdentifier:"LoginViewController" ) as! LoginViewController
                            self.navigationController?.pushViewController(loginVC, animated: true)
                        }
                    }
                    else {
                        let userModel = DBManager.sharedInstance.database.objects(UserDetailsModel.self)
                        if userModel.contains(where: {$0.email == user?.profile?.email}) {
                            //Navigate to Home
                            DispatchQueue.main.async {
                                let loaderVC = self.storyboard?.instantiateViewController(withIdentifier:"LoadingAnimationViewController" ) as! LoadingAnimationViewController
                                self.navigationController?.pushViewController(loaderVC, animated: true)
                            }
                        }
                        else {
                            //Navigate to User details
                            DispatchQueue.main.async {
                                let loaderVC = self.storyboard?.instantiateViewController(withIdentifier:"UserDetailsViewController" ) as! UserDetailsViewController
                                self.navigationController?.pushViewController(loaderVC, animated: true)
                            }
                        }
                    }
                }
            }
            else {
                let userIdentifier = UserDefaultsConstant.getValueFromUserDefults(for: Constant.userIdentifier) as! String
                let appleIDProvider = ASAuthorizationAppleIDProvider()
                appleIDProvider.getCredentialState(forUserID: userIdentifier) { (credentialState, error) in
                    switch credentialState {
                    case .authorized:
                        DispatchQueue.main.async {
                            let loaderVC = self.storyboard?.instantiateViewController(withIdentifier:"LoadingAnimationViewController" ) as! LoadingAnimationViewController
                            self.navigationController?.pushViewController(loaderVC, animated: true)
                        }
//                        let userModel = DBManager.sharedInstance.database.objects(UserDetailsModel.self)
//                        if userModel.contains(where: {$0.appleIdentifier == userIdentifier}) {
//                            //Navigate to Home
//                            DispatchQueue.main.async {
//                                let loaderVC = self.storyboard?.instantiateViewController(withIdentifier:"LoadingAnimationViewController" ) as! LoadingAnimationViewController
//                                self.navigationController?.pushViewController(loaderVC, animated: true)
//                            }
//                        }
//                        else {
//                            //Navigate to User details
//                            DispatchQueue.main.async {
//                                let userDetailsVC = self.storyboard?.instantiateViewController(withIdentifier:"UserDetailsViewController" ) as! UserDetailsViewController
//                                self.navigationController?.pushViewController(userDetailsVC, animated: true)
//                            }
//                        }
                        // The Apple ID credential is valid.
                        break
                    case .revoked, .notFound:
                        // The Apple ID credential is either revoked or was not found, so show the sign-in UI.
                        DispatchQueue.main.async {
                            let loginVC = self.storyboard?.instantiateViewController(withIdentifier:"LoginViewController" ) as! LoginViewController
                            self.navigationController?.pushViewController(loginVC, animated: true)
                        }
                    default:
                        break
                    }
                }
            }
        }
    }
    
}