//
//  QuizViewController.swift
//  LMS
//
//  Created by Suraj Kumar Mandal on 24/08/22.
//

import UIKit
import Toast_Swift

class QuizViewController: UIViewController {
    
    @IBOutlet var navigationBar: UINavigationBar!
    @IBOutlet var questionNumberLabel: UILabel!
    @IBOutlet var timerLabel: UILabel!
    @IBOutlet var questionTypeLabel: UILabel!
    @IBOutlet var questionLabel: UILabel!
    @IBOutlet var answerInstructionLabel: UILabel!
    @IBOutlet var quizView: UIView!
    @IBOutlet var answerTF: UITextField!
    @IBOutlet var mcqView: UIView!
    @IBOutlet var mcqTableView: UITableView!
    @IBOutlet var trueFalseView: UIView!
    @IBOutlet var boolTableView: UITableView!
    @IBOutlet var dragView: UIView!
    @IBOutlet var option1TableView: UITableView!
    @IBOutlet var option2TableView: UITableView!
    @IBOutlet var questionNumbersButton: UIButton!
    //Quiz submit UI outlets
    @IBOutlet var quizSubmittedView: UIView!
    @IBOutlet var customSubmittedView: UIView!
    @IBOutlet var checkImageView: UIImageView!
    //Question number UI outlets
    @IBOutlet var questionNumberView: UIView!
    @IBOutlet var questionCustomView: UIView!
    @IBOutlet var questionNumberCollectionView: UICollectionView!
    @IBOutlet var collectionViewHeightConstraint: NSLayoutConstraint!
    
    
    let userData = DBManager.sharedInstance.database.objects(UserDetailsModel.self)
    var viewModel = QuizViewModel()
    var quizModel = [QuizModel]()
    //var answerSubmit = [SubmitAnswerModel]()
    var timer = Timer()
    var assessmentId = Int()
    var assessmentName = String()
    var quesIndex = 1
    var count = 1500
    var answer = [String]()
    var quesNo = Int()
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        // Do any additional setup after loading the view.
        print(assessmentName)
        navigationBar.topItem?.title = assessmentName
        viewModel.delegate = self
        quizSubmittedView.isHidden = true
        questionNumberView.isHidden = true
        
        questionNumberLabel.clipsToBounds = true
        questionNumberLabel.layer.cornerRadius = 10
        questionNumberLabel.layer.maskedCorners = [.layerMaxXMinYCorner, .layerMinXMinYCorner]
        questionNumbersButton.layer.cornerRadius = questionNumbersButton.frame.size.height / 2
        
        questionNumberCollectionView.delegate = self
        questionNumberCollectionView.dataSource = self
        // Assuming you've reloaded or updated the data in your UICollectionView
        questionNumberCollectionView.reloadData()

        // Call the method to adjust the height
        updateCollectionViewHeight()

        getQuizData()
        getQuizTime()
    }
    
    func getQuizData() {
        if Reachability.isConnectedToNetwork() {
            viewModel.getQuizData(assessmentId: assessmentId)
        } else {
            Alert.showInternetFailureAlert(on: self)
        }
    }
    
    func getQuizTime() {
        if Reachability.isConnectedToNetwork() {
            viewModel.getQuizTime(assessmentId: assessmentId)
        } else {
            Alert.showInternetFailureAlert(on: self)
        }
    }
    
    func setupUI() {
        self.questionCustomView.layer.cornerRadius = 20
        if quizModel[quesIndex-1].questionType == AppConstant.MultipleMCQ {
            answerInstructionLabel.text = "Select [One/More Than One] Options"
            self.answerTF.isHidden = true
            self.mcqView.isHidden = false
            self.mcqTableView.delegate = self
            self.mcqTableView.dataSource = self
            self.mcqTableView.allowsMultipleSelection = true
            self.mcqTableView.allowsMultipleSelectionDuringEditing = true
            self.mcqTableView.reloadData()
            self.trueFalseView.isHidden = true
            self.dragView.isHidden = true
        } else if quizModel[quesIndex-1].questionType == AppConstant.SingleMCQ {
            answerInstructionLabel.text = "Select One Option"
            self.answerTF.isHidden = true
            self.mcqView.isHidden = false
            self.mcqTableView.delegate = self
            self.mcqTableView.dataSource = self
            self.mcqTableView.allowsMultipleSelection = false
            self.mcqTableView.allowsMultipleSelectionDuringEditing = false
            self.mcqTableView.reloadData()
            self.trueFalseView.isHidden = true
            self.dragView.isHidden = true
        } else if quizModel[quesIndex-1].questionType == AppConstant.Fill {
            answerInstructionLabel.text = "Enter Answer In Input Box"
            self.answerTF.isHidden = false
            self.mcqView.isHidden = true
            self.trueFalseView.isHidden = true
            self.dragView.isHidden = true
        } else if quizModel[quesIndex-1].questionType == AppConstant.TrueFalse {
            answerInstructionLabel.text = "Choose One Option"
            self.answerTF.isHidden = true
            self.mcqView.isHidden = true
            self.trueFalseView.isHidden = false
            self.boolTableView.delegate = self
            self.boolTableView.dataSource = self
            self.boolTableView.reloadData()
            self.dragView.isHidden = true
        } else if quizModel[quesIndex-1].questionType == AppConstant.Match {
            answerInstructionLabel.text = "Drag And Drop Correct Match From Right Hand Side"
            self.answerTF.isHidden = true
            self.mcqView.isHidden = true
            self.trueFalseView.isHidden = true
            self.dragView.isHidden = false
            self.option1TableView.delegate = self
            self.option1TableView.dataSource = self
            self.option1TableView.reloadData()
            self.option2TableView.delegate = self
            self.option2TableView.dataSource = self
            self.option2TableView.dragDelegate = self
            self.option2TableView.dragInteractionEnabled = true
            self.option2TableView.reloadData()
        }
    }
    
    func setupData() {
        answerTF.text = ""
        answer.removeAll()
        questionNumberLabel.text = " Question No. - \(quesIndex)/\(quizModel.count) "
        questionTypeLabel.text = quizModel[quesIndex-1].questionType
        questionLabel.text = "Q. \(quizModel[quesIndex-1].question ?? "")"
    }
    
    func startTimer() {
        // Create a Timer that fires every second and calls the updateTimer function
        timer = Timer.scheduledTimer(timeInterval: 1, target: self, selector: #selector(update), userInfo: nil, repeats: true)
    }
    
    @objc func update() {
        if count > 0 {
            count -= 1
            
            let minutes = count / 60
            let seconds = count % 60
            
            // Format the time as "mm:ss"
            let timeString = String(format: "%02d:%02d", minutes, seconds)
            
            // Update the label with the remaining time
            timerLabel.text = timeString
        } else {
            // Timer has finished, you can handle this event as needed
            timerLabel.text = "00:00" // Display 00:00 when the timer is done
            timer.invalidate()
        }
    }
    
    func submitAnswer() {
        if quizModel[quesIndex-1].questionType == AppConstant.Fill {
            if answerTF.text?.isEmpty == true {
                self.view.makeToast("Enter your answer first!")
            } else {
                answer.append(answerTF.text!)
                print(answer)
                if Reachability.isConnectedToNetwork() {
                    viewModel.submitQuizAnswer(quizId: quizModel[quesIndex-1].id ?? 0, userId: userData[0].id, questionId: quizModel[quesIndex-1].assessmentId ?? 0, quesType: quizModel[quesIndex-1].questionType ?? "", answers: self.answer)
                } else {
                    Alert.showInternetFailureAlert(on: self)
                }
            }
        } else {
            if Reachability.isConnectedToNetwork() {
                viewModel.submitQuizAnswer(quizId: quizModel[quesIndex-1].id ?? 0, userId: userData[0].id, questionId: quizModel[quesIndex-1].assessmentId ?? 0, quesType: quizModel[quesIndex-1].questionType ?? "", answers: self.answer)
            } else {
                Alert.showInternetFailureAlert(on: self)
            }
        }
    }
    
    /*
     // 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 skipAction(_ sender: Any) {
        if quesIndex <= quizModel.count {
            self.quesIndex += 1
            setupUI()
            setupData()
        } else {
            self.view.makeToast("Click Next to Submit!")
        }
    }
    
    @IBAction func nextAction(_ sender: Any) {
        if self.quesIndex < quizModel.count {
            submitAnswer()
        } else {
            Alert.showAlertWithAction(vc: self, title: assessmentName, message: "Are you want to submit your answer?", alertStyle: .alert, actionTitles: ["Ok"], actionStyles: [.default], actions: [{_ in
                self.submitAnswer()
            }])
        }
    }
    
    @IBAction func closeAction(_ sender: Any) {
        timer.invalidate()
        let vc = self.storyboard?.instantiateViewController(withIdentifier: "AssessmentBeneficiaryViewController") as! AssessmentBeneficiaryViewController
        self.navigationController?.pushViewController(vc, animated: true)
    }
    
    @IBAction func quesNumberAction(_ sender: Any) {
        questionNumberView.isHidden = false
    }
    
    @IBAction func cancelAction(_ sender: Any) {
        questionNumberView.isHidden = true
    }
    
    
}

extension QuizViewController: QuizViewProtocol {
    func startLoader() {
        ActivityIndicator.start()
    }
    
    func stopLoader() {
        ActivityIndicator.stop()
    }
    
    func showError(error: String) {
        self.view.makeToast(error)
    }
    
    func quizModel(model: [QuizModel]) {
        self.quizModel = model
        self.setupUI()
        self.setupData()
    }
    
    func setQuizTime(time: Int) {
        self.count = time * 60
        self.startTimer()
    }
    
    func answerSubmitted() {
        if self.quesIndex < quizModel.count {
            self.quesIndex += 1
            setupUI()
            setupData()
        } else {
            quizSubmittedView.isHidden = false
        }
    }
}

extension QuizViewController: UITableViewDelegate, UITableViewDataSource, UITableViewDragDelegate {
    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        if tableView == mcqTableView {
            return quizModel[quesIndex-1].options?.count ?? 0
        } else if tableView == boolTableView {
            return 2
        } else if tableView == option1TableView {
            return quizModel[quesIndex-1].optionsOne?.count ?? 0
        } else {
            return quizModel[quesIndex-1].optionsTwo?.count ?? 0
        }
    }
    
    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        if tableView == mcqTableView {
            guard let cell = tableView.dequeueReusableCell(withIdentifier: "MCQTableViewCell", for: indexPath) as? MCQTableViewCell else {
                return UITableViewCell()
            }
            
            cell.optionLabel.text = quizModel[quesIndex-1].options?[indexPath.row]
            
            return cell
        } else if tableView == boolTableView {
            guard let cell = tableView.dequeueReusableCell(withIdentifier: "TrueFalseTableViewCell", for: indexPath) as? TrueFalseTableViewCell else {
                return UITableViewCell()
            }
            
            cell.optionLabel.text = AppConstant.boolOption[indexPath.row]
            
            return cell
        } else if tableView == option1TableView {
            guard let cell = tableView.dequeueReusableCell(withIdentifier: "DragTableViewCell", for: indexPath) as? DragTableViewCell else {
                return UITableViewCell()
            }
            
            cell.optionLabel.text = quizModel[quesIndex-1].optionsOne?[indexPath.row]
            
            return cell
        } else {
            guard let cell = tableView.dequeueReusableCell(withIdentifier: "DragTableViewCell", for: indexPath) as? DragTableViewCell else {
                return UITableViewCell()
            }
            
            cell.optionLabel.text = quizModel[quesIndex-1].optionsTwo?[indexPath.row]
            
            return cell
        }
    }
    
    func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
        if tableView == mcqTableView {
            if quizModel[quesIndex-1].questionType == AppConstant.MultipleMCQ {
                if answer.contains(quizModel[quesIndex-1].options?[indexPath.row] ?? "") {
                    if let index = answer.firstIndex(of: quizModel[quesIndex-1].options?[indexPath.row] ?? "") {
                        answer.remove(at: index)
                    }
                    print(answer)
                } else {
                    answer.append(quizModel[quesIndex-1].options?[indexPath.row] ?? "")
                    print(answer)
                }
            } else if quizModel[quesIndex-1].questionType == AppConstant.SingleMCQ {
                answer.removeAll()
                answer.append(quizModel[quesIndex-1].options?[indexPath.row] ?? "")
                print(answer)
            }
        } else {
            answer.removeAll()
            answer.append(AppConstant.boolOption[indexPath.row])
            print(answer)
        }
    }
    
    func tableView(_ tableView: UITableView, didDeselectRowAt indexPath: IndexPath) {
        if tableView == mcqTableView {
            if quizModel[quesIndex-1].questionType == AppConstant.MultipleMCQ {
                if answer.contains(quizModel[quesIndex-1].options?[indexPath.row] ?? "") {
                    if let index = answer.firstIndex(of: quizModel[quesIndex-1].options?[indexPath.row] ?? "") {
                        answer.remove(at: index)
                    }
                    print(answer)
                } else {
                    answer.append(quizModel[quesIndex-1].options?[indexPath.row] ?? "")
                    print(answer)
                }
            } else if quizModel[quesIndex-1].questionType == AppConstant.SingleMCQ {
                answer.removeAll()
                answer.append(quizModel[quesIndex-1].options?[indexPath.row] ?? "")
                print(answer)
            }
        }
    }
    
    func tableView(_ tableView: UITableView, itemsForBeginning session: UIDragSession, at indexPath: IndexPath) -> [UIDragItem] {
        let dragItem = UIDragItem(itemProvider: NSItemProvider())
        dragItem.localObject = quizModel[quesIndex-1].optionsTwo?[indexPath.row]
        return [ dragItem ]
    }
    
    func tableView(_ tableView: UITableView, moveRowAt sourceIndexPath: IndexPath, to destinationIndexPath: IndexPath) {
        // Update the model
        let mover = quizModel[quesIndex-1].optionsTwo?.remove(at: sourceIndexPath.row) ?? ""
        quizModel[quesIndex-1].optionsTwo?.insert(mover, at: destinationIndexPath.row)
        
        //print("\(quizModel[quesIndex-1].optionsOne?[destinationIndexPath.row] ?? "") - \(quizModel[quesIndex-1].optionsTwo?[destinationIndexPath.row] ?? "")")
        self.answer.removeAll()
        for i in 0...quizModel[quesIndex-1].optionsOne!.count-1 {
            let match = "\(quizModel[quesIndex-1].optionsOne?[i] ?? "")-\(quizModel[quesIndex-1].optionsTwo?[i] ?? "")"
            answer.append(match)
        }
        print(answer)
    }
    
}

extension QuizViewController: UICollectionViewDelegate, UICollectionViewDataSource, UICollectionViewDelegateFlowLayout {
    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        return quizModel.count
    }
    
    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
        let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "QuestionNumberCollectionViewCell", for: indexPath as IndexPath) as! QuestionNumberCollectionViewCell
        
        cell.customCellView.backgroundColor = #colorLiteral(red: 0.8039215803, green: 0.8039215803, blue: 0.8039215803, alpha: 1)
        cell.customCellView.layer.cornerRadius = cell.customCellView.frame.height / 2
        cell.serialNoLabel.text = "\(indexPath.row + 1)"
        
        return cell
    }
    
    func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
        self.quesIndex = indexPath.row + 1
        self.questionNumberView.isHidden = true
        setupUI()
        setupData()
    }
    
    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
        let cellWidth = collectionView.frame.size.width / 5
        return CGSize(width: cellWidth, height: cellWidth)
    }
    
    func updateCollectionViewHeight() {
        // Calculate the content size of the UICollectionView based on its content
        questionNumberCollectionView.layoutIfNeeded()
        let contentSize = questionNumberCollectionView.collectionViewLayout.collectionViewContentSize

        // Update the height constraint to match the content size
        collectionViewHeightConstraint.constant = contentSize.height
    }
}