//
//  TakeQuizViewController.swift
//  Learn Genie
//
//  Created by Suraj Kumar Mandal on 15/09/21.
//

import UIKit
import Alamofire

class TakeQuizViewController: UIViewController {
    
    @IBOutlet var quesHeadLabel: UILabel!
    @IBOutlet var timerLabel: UILabel!
    @IBOutlet var questionLabel: UILabel!
    @IBOutlet var nextButton: UIButton!
    @IBOutlet var previousButton: UIButton!
    @IBOutlet var cancelButton: UIButton!
    @IBOutlet var minuteSecondLabel: UILabel!
    @IBOutlet var choiceCollectionView: UICollectionView!
    @IBOutlet var choiceCollectionViewHeight: NSLayoutConstraint!
    
    //Result submit pop up view outlets
    @IBOutlet var submitPopupView: UIView!
    @IBOutlet var resultImageView: UIImageView!
    @IBOutlet var resultHeadingLabel: UILabel!
    @IBOutlet var resultSubHeadingLabel: UILabel!
    @IBOutlet var tryAgainButton: UIButton!
    @IBOutlet var popUpNextButton: UIButton!
    @IBOutlet var viewAnswerButton: UIButton!
    
    var timer = Timer()
    var secondsLeft: Int = 300
    var quesIndex = 0
    var selectedAnswer = [SelectedAnswerModel]()
    let studentId = UserDefaultsConstant.getIntValueFromUserDefults(for: Constant.studentId) as! Int
    
    var topicId = Int()
    var quesBankId = Int()
    var quesId = Int()
    var selectedChoiceId = Int()
    var answerChoiceId = Int()
    var choiceArray = [Int]()
    
    var selectedButtonIndexPath: IndexPath?
    
    //Not changing values in quiz process
    var levelId = Int()
    var runs = Int()
    var wickets = Int()
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        // Do any additional setup after loading the view.
        choiceCollectionView.delegate = self
        choiceCollectionView.dataSource = self
        ApiManager.generateCookie()
    }
    
    override func viewWillAppear(_ animated: Bool) {
        self.timer  = Timer.scheduledTimer(timeInterval: 1.0, target: self, selector: #selector(self.runScheduledTask), userInfo: nil, repeats: true)
        setupUI()
        selectedAnswer.removeAll()
    }
    
    override func viewDidLayoutSubviews() {
        super.viewDidLayoutSubviews()
        let height = choiceCollectionView.collectionViewLayout.collectionViewContentSize.height
        choiceCollectionViewHeight.constant = height
        self.view.layoutIfNeeded()
    }
    
    func setupUI() {
        getQuesBankId()
        submitPopupView.isHidden = true
        self.quesHeadLabel.text = "\(Helper.translateText(inputText: "Question")) \(quesIndex+1)"
        if quesIndex == 4 {
            nextButton.setTitle(Helper.translateText(inputText: "SUBMIT"), for: .normal)
        } else {
            nextButton.setTitle(Helper.translateText(inputText: "Next"), for: .normal)
        }
        previousButton.setTitle(Helper.translateText(inputText: "Previous"), for: .normal)
        cancelButton.setTitle(Helper.translateText(inputText: "CANCEL"), for: .normal)
        nextButton.setTitle(Helper.translateText(inputText: "Next"), for: .normal)
        tryAgainButton.setTitle(Helper.translateText(inputText: "TRY AGAIN"), for: .normal)
        popUpNextButton.setTitle(Helper.translateText(inputText: "Next"), for: .normal)
        viewAnswerButton.setTitle(Helper.translateText(inputText: "View Answer"), for: .normal)
        minuteSecondLabel.text = "\(Helper.translateText(inputText: "Minutes")) : \(Helper.translateText(inputText: "Seconds"))"
    }
    
    @objc func runScheduledTask(_ runningTimer: Timer) {
        var minute: Int
        var second: Int
        secondsLeft -= 1
        
        if secondsLeft == 0  || secondsLeft < 0 {
            timerLabel.text = "00 : 00"
            timer.invalidate()
            getResult()
            saveScoreBoard()
        } else {
            minute = (secondsLeft % 3600) / 60
            second = (secondsLeft % 3600) % 60
            timerLabel.text = "\(String(format: "%02d", minute)) : \(String(format: "%02d", second))"
            print()
        }
    }
    
    func getQuesBankId() {
        let topicData = DBManager.sharedInstance.database.objects(TopicModel.self)
        for item in topicData {
            if self.topicId == item.id {
                self.levelId = item.levelId
                self.quesBankId = item.questionBankId
                self.choiceArray.removeAll()
                let quesBankData = DBManager.sharedInstance.database.objects(QuestionBankModel.self)
                for item in quesBankData {
                    if self.quesBankId == item.id {
                        print(item.questions[quesIndex])
                        let quesData = DBManager.sharedInstance.database.objects(QuestionModel.self)
                        for data in quesData {
                            if data.id == item.questions[quesIndex].id {
                                print("Current Question: \(data.content)")
                                self.quesId = data.id
                                self.answerChoiceId = data.answerId
                                self.questionLabel.text = Helper.translateText(inputText: data.content)
                                for choice in data.choices {
                                    let id = choice.id
                                    self.choiceArray.append(id)
                                }
                            }
                        }
                    }
                }
            }
        }
        print("Current choices: \(choiceArray)")
        choiceCollectionView.reloadData()
    }
    
    func getChoice(id:Int) -> String {
        let choiceData = DBManager.sharedInstance.database.objects(ChoiceModel.self)
        var choiceString = ""
        for choice in choiceData {
            if id == choice.id {
                choiceString = choice.content
            }
        }
        return choiceString
    }
    
    
    func saveSelectedChoice() {
        if let row = self.selectedAnswer.firstIndex(where: {$0.quesId == self.quesId}) {
            print("Before update: \(selectedAnswer[row])")
            selectedAnswer[row].choiceId = self.selectedChoiceId
            print("After update: \(selectedAnswer[row])")
        } else {
            let answer = SelectedAnswerModel(quesId: quesId, choiceId: selectedChoiceId, answerId: answerChoiceId)
            selectedAnswer.append(answer)
        }
        
        for item in selectedAnswer {
            print("Saved QuesId: \(item.quesId), Saved ChoiceId: \(item.choiceId), Saved Answer: \(item.answerId)")
        }
    }
    
    func getSelectedChoice() {
        if let row = self.selectedAnswer.firstIndex(where: {$0.quesId == self.quesId}) {
            selectedAnswer[row].choiceId = self.selectedChoiceId
        }
    }
    
    @objc func selectChoice(sender: UIButton) {
        let buttonPosition:CGPoint = sender.convert(CGPoint.zero, to:self.choiceCollectionView)
        let indexPath = self.choiceCollectionView.indexPathForItem(at: buttonPosition)
        if indexPath != selectedButtonIndexPath {
            selectedButtonIndexPath = indexPath
        } else { // If same button selected, deselect? Unless you want a different behavior
            selectedButtonIndexPath = nil
        }
        choiceCollectionView.reloadData()
    }
    
    func getCorrectAnswerNumber() -> Int {
        var score = 0
        for answer in selectedAnswer {
            if answer.choiceId == answer.answerId {
                score += 1
            }
        }
        return score
    }
    
    func getResult() {
        switch getCorrectAnswerNumber() {
        case 0, 1:
            resultImageView.image = UIImage(named: "i_run_out")
            resultHeadingLabel.text = Helper.translateText(inputText: "Oh No You are Out Better luck next time")
            resultSubHeadingLabel.text = "\(Helper.translateText(inputText: "You have got")) \(getCorrectAnswerNumber())/5 \(Helper.translateText(inputText: "questions right"))"
            runs = 0
            wickets = 1
            return
        case 2:
            resultImageView.image = UIImage(named: "i_run_two")
            resultHeadingLabel.text = Helper.translateText(inputText: "It\'s a two Try Again")
            resultSubHeadingLabel.text = "\(Helper.translateText(inputText: "You have got")) \(getCorrectAnswerNumber())/5 \(Helper.translateText(inputText: "questions right"))"
            runs = 0
            wickets = 0
            return
        case 3:
            resultImageView.image = UIImage(named: "i_run_three")
            resultHeadingLabel.text = Helper.translateText(inputText: "It\'s a three Nice Hit")
            resultSubHeadingLabel.text = "\(Helper.translateText(inputText: "You have got")) \(getCorrectAnswerNumber())/5 \(Helper.translateText(inputText: "questions right"))"
            runs = 3
            wickets = 0
            return
        case 4:
            resultImageView.image = UIImage(named: "i_run_four")
            resultHeadingLabel.text = Helper.translateText(inputText: "It\'s a four What a tremendous hit")
            resultSubHeadingLabel.text = "\(Helper.translateText(inputText: "You have got")) \(getCorrectAnswerNumber())/5 \(Helper.translateText(inputText: "questions right"))"
            runs = 4
            wickets = 0
            return
        case 5:
            resultImageView.image = UIImage(named: "i_run_six")
            resultHeadingLabel.text = Helper.translateText(inputText: "It\'s a six What a tremendous hit")
            resultSubHeadingLabel.text = "\(Helper.translateText(inputText: "You have got")) \(getCorrectAnswerNumber())/5 \(Helper.translateText(inputText: "questions right"))"
            runs = 6
            wickets = 0
            return
        default:
            return
        }
    }
    
    func saveScoreBoard() {
        if Reachability.isConnectedToNetwork() {
            let saveScore = [SaveScoreBoard]()
            var noOfAttempts = 0
            for quiz in saveScore {
                if quiz.topicId == self.topicId {
                    noOfAttempts += 1
                } else {
                    noOfAttempts = 1
                }
            }
            saveScoreboard(levelId: self.levelId, topicId: self.topicId, runs: self.runs, wickets: self.wickets, noOfAttempts: noOfAttempts)
        } else {
            var saveScore = [SaveScoreBoard]()
            let itemId = saveScore.count + 1
            var noOfAttempts = 0
            for quiz in saveScore {
                if quiz.topicId == self.topicId {
                    noOfAttempts += 1
                } else {
                    noOfAttempts = 1
                }
            }
            let newSaveScoreModel = SaveScoreBoard(id: itemId, levelId: levelId, topicId: topicId, runs: runs, wickets: wickets, noOfAttempts: noOfAttempts, student: studentId, synced: false)
            saveScore.append(newSaveScoreModel)
            DBManager.sharedInstance.addData(objs: saveScore)
            let quizTakenData = DBManager.sharedInstance.database.objects(SaveScoreBoard.self)
            print(quizTakenData.count)
        }
    }
    
    
    /*
     // 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.
     }
     */
    
    @IBAction func quizButtonAction(_ sender: UIButton) {
        switch sender.tag {
        case 0:
            if quesIndex > 0 {
                quesIndex -= 1
                setupUI()
                //getSelectedChoice()
            }
            break
        case 1:
            if quesIndex == 4 {
                saveSelectedChoice()
                Alert.showAlertWithAction(vc: self, title: Helper.translateText(inputText: "Are you sure, you want to submit the quiz?"), message: "\(Helper.translateText(inputText: "You have completed")) \(selectedAnswer.count) \(Helper.translateText(inputText: "out of")) 5 \(Helper.translateText(inputText: "questions"))", alertStyle: .alert, actionTitles: [Helper.translateText(inputText: "CANCEL"), Helper.translateText(inputText: "YES")], actionStyles: [.cancel, .default], actions: [{_ in
                    print("cancel click")
                }, {[self]_ in
                    print("yes click")
                    timer.invalidate()
                    getResult()
                    saveScoreBoard()
                }])
            } else {
                if quesIndex < 4 {
                    saveSelectedChoice()
                    selectedButtonIndexPath = nil
                    quesIndex += 1
                    setupUI()
                }
            }
            break
        case 2:
            Alert.showAlertWithAction(vc: self, title: Helper.translateText(inputText: "Are you sure you want to exit the quiz?"), message: "", alertStyle: .alert, actionTitles: [Helper.translateText(inputText: "CANCEL"), Helper.translateText(inputText: "YES")], actionStyles: [.cancel, .default], actions: [{_ in
                print("cancel click")
            }, { [self]_ in
                print("yes click")
                timer.invalidate()
                self.navigationController?.popViewController(animated: true)
            }])
            break
        default:
            break
        }
    }
    
    @IBAction func resultPopupCloseAction(_ sender: Any) {
        submitPopupView.isHidden = true
    }
    
    @IBAction func resultPopupButtonAction(_ sender: UIButton) {
        switch sender.tag {
        case 0:
            submitPopupView.isHidden = true
            self.navigationController?.popViewController(animated: true)
        case 1:
            submitPopupView.isHidden = true
            self.navigationController?.popViewController(animated: true)
        case 2:
            //submitPopupView.isHidden = true
            DispatchQueue.main.async {
                let viewAnswerVC = self.storyboard?.instantiateViewController(withIdentifier: "ViewAnswerViewController") as! ViewAnswerViewController
                viewAnswerVC.selectedAnswer.removeAll()
                viewAnswerVC.selectedAnswer = self.selectedAnswer
                self.navigationController?.pushViewController(viewAnswerVC, animated: true)
            }
        default:
            return
        }
    }
    
}

extension TakeQuizViewController: UICollectionViewDelegate, UICollectionViewDataSource, UICollectionViewDelegateFlowLayout {
    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        return choiceArray.count
    }
    
    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
        guard let cell: ChoiceCollectionViewCell = collectionView.dequeueReusableCell(withReuseIdentifier: "ChoiceCollectionViewCell", for: indexPath) as? ChoiceCollectionViewCell else {
            return UICollectionViewCell()
        }
        cell.choiceLabel.text = Helper.translateText(inputText: getChoice(id: choiceArray[indexPath.row]))
        cell.radioButton.tag = indexPath.row
        cell.radioButton.addTarget(self, action: #selector(selectChoice(sender:)), for: .touchUpInside)
        
        if let row = self.selectedAnswer.firstIndex(where: {$0.quesId == self.quesId}) {
            print(self.quesId)
            if selectedAnswer[row].choiceId == choiceArray[indexPath.row] {
                print(selectedAnswer[row].choiceId, choiceArray[indexPath.row])
                cell.radioButton.isSelected = true
            } else {
                cell.radioButton.isSelected = false
            }
        } else {
            if indexPath == selectedButtonIndexPath { // If button is selected
                cell.radioButton.isSelected = true
                self.selectedChoiceId = choiceArray[indexPath.row]
            } else { // If it is not selected
                cell.radioButton.isSelected = false
            }
        }
        
        return cell
    }
    
    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
        return CGSize(width: (collectionView.frame.size.width-10)/2, height: 70)
    }
    
}

extension UICollectionView {
    
    func deselectAllItems(animated: Bool) {
        guard let selectedItems = indexPathsForSelectedItems else { return }
        for indexPath in selectedItems { deselectItem(at: indexPath, animated: animated) }
    }
}

extension TakeQuizViewController {
    func saveScoreboard(levelId:Int, topicId:Int, runs:Int, wickets:Int, noOfAttempts: Int) {
        let url = "\(ApiUrl.BASE_URL + ApiUrl.API_SCOREBOARD)/save.json"
        print(url)
        let cookieValue = UserDefaultsConstant.getValueFromUserDefults(for: "cookieValue") ?? ""
        let headers: HTTPHeaders = [
            "Content-Type": "application/json",
            "Accept": "application/json",
            "Cookie": "\(Constant.CookieName) = \(cookieValue)"
        ]
        print(headers)
        
        let params: Parameters?
        params = [
            "student" : studentId,
            "level" : levelId,
            "topic" : topicId,
            "runs" : runs,
            "wickets" : wickets,
            "noOfAttempts" : noOfAttempts
        ]
        print(params!)
        
        AF.request(url, method: .post, parameters: params, encoding: JSONEncoding.default, headers: headers).responseJSON { response in
            switch response.result {
            case .success(let value):
                print(value)
                let scoreData = value as! NSDictionary
                
                let student = scoreData.value(forKey: "student") as! NSObject;
                let studentId = student.value(forKey: "id") as! NSNumber;
                let topic = scoreData.value(forKey: "topic") as! NSObject;
                let topicId = topic.value(forKey: "id") as! NSNumber;
                let level = scoreData.value(forKey: "level") as! NSObject;
                let levelId = level.value(forKey: "id") as! NSNumber;
                let runs = scoreData.value(forKey: "runs") as! NSNumber;
                let wickets = scoreData.value(forKey: "wickets") as! NSNumber;
                let noOfAttempts = scoreData.value(forKey: "noOfAttempts") as! NSNumber;
                
                var saveScoreModel = [SaveScoreBoard]()
                let id = saveScoreModel.count + 1
                let newSaveScoreModel = SaveScoreBoard(id: id, levelId: Int(truncating: levelId), topicId: Int(truncating: topicId), runs: Int(truncating: runs), wickets: Int(truncating: wickets), noOfAttempts: Int(truncating: noOfAttempts), student: Int(truncating: studentId), synced: true)
                
                saveScoreModel.append(newSaveScoreModel)
                
                DBManager.sharedInstance.addData(objs: saveScoreModel)
                let saveScoreDB = DBManager.sharedInstance.database.objects(SaveScoreBoard.self)
                
                print("save score count")
                print(saveScoreDB.count)
                
                self.submitPopupView.isHidden = false
            case .failure(let error):
                print(error)
            }
        }
    }
}