//
//  DashboardViewController.swift
//  LMS
//
//  Created by Suraj Kumar Mandal on 18/08/22.
//

import UIKit
import SideMenu
import Toast_Swift

class DashboardViewController: UIViewController {
    
    @IBOutlet var navigationBar: UINavigationBar!
    @IBOutlet var usernameLabel: UILabel!
    @IBOutlet var academicYearLabel: UILabel!
    @IBOutlet var classLabel: UILabel!
    @IBOutlet var divisionLabel: UILabel!
    @IBOutlet var typeSegmentControl: UISegmentedControl!
    @IBOutlet var upcomingSessionView: UIView!
    @IBOutlet var sessionListTableView: UITableView!
    @IBOutlet var viewAllSessionButton: UIButton!
    @IBOutlet var upcomingAssessmentView: UIView!
    @IBOutlet var assessmentListTableView: UITableView!
    @IBOutlet var viewAllAssessmentButton: UIButton!
    
    let userData = DBManager.sharedInstance.database.objects(UserDetailsModel.self)
    let studentData = DBManager.sharedInstance.database.objects(StudentDetailsModel.self)
    
    var viewModel = DashboardViewModel()
    var sessionListModel = [SessionListModel]()
    var assessmentListModel = [AssessmentListModel]()
    var expandedSections = Set<Int>()
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        // Do any additional setup after loading the view.
        viewModel.delegate = self
        setupData()
        upcomingSessionView.isHidden = true
        upcomingAssessmentView.isHidden = true
        
        sessionListTableView.delegate = self
        sessionListTableView.dataSource = self
        
        assessmentListTableView.delegate = self
        assessmentListTableView.dataSource = self
    }
    
    override func viewWillAppear(_ animated: Bool) {
        viewModel.getSessionList(userId: userData[0].id, interventionId: "", batchId: "", schoolId: "", interventionLevelId: "", month: getCurrentMonth())
        viewModel.getAssessmentList(userId: userData[0].id, month: getCurrentMonth())
    }
    
    func setupData() {
        navigationBar.topItem?.title = "Dashboard"
        usernameLabel.text = "Hi \(userData[0].name),"
        academicYearLabel.text = studentData[0].academicYear
        classLabel.text = studentData[0].standard
        divisionLabel.text = studentData[0].division
    }
    
    func getCurrentMonth() -> String {
        let date = Date()
        let format = DateFormatter()
        format.dateFormat = "MM-yyyy"
        let formattedMonth = format.string(from: date)
        return formattedMonth
    }
    
    private func executeRepeatedly() {
        // put your code here
        self.sessionListTableView.reloadData()
        self.assessmentListTableView.reloadData()
        DispatchQueue.main.asyncAfter(deadline: .now() + 60.0) { [weak self] in
            self?.executeRepeatedly()
        }
    }
    
    func formattedDateFromString(dateString: String, withFormat format: String) -> String? {
        let inputFormatter = DateFormatter()
        inputFormatter.dateFormat = "yyyy-MM-dd"
        if let date = inputFormatter.date(from: dateString) {
            let outputFormatter = DateFormatter()
            outputFormatter.dateFormat = format
            return outputFormatter.string(from: date)
        }
        return nil
    }
    
    func formatDate(dateString: String, withFormat format: String) -> String? {
        let inputFormatter = DateFormatter()
        inputFormatter.dateFormat = "yyyy-MM-dd HH:mm:ss"
        if let date = inputFormatter.date(from: dateString) {
            let outputFormatter = DateFormatter()
            outputFormatter.dateFormat = format
            return outputFormatter.string(from: date)
        }
        return nil
    }
    
    func formattedTimeFromString(dateString: String, withFormat format: String) -> String? {
        let inputFormatter = DateFormatter()
        inputFormatter.dateFormat = "yyyy-MM-dd HH:mm:ss"
        if let date = inputFormatter.date(from: dateString) {
            let outputFormatter = DateFormatter()
            outputFormatter.dateFormat = format
            outputFormatter.timeStyle = .short
            return outputFormatter.string(from: date)
        }
        return 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.
     }
     */
    
    
    @IBAction func sideMenuAction(_ sender: UIBarButtonItem) {
        let menu = storyboard!.instantiateViewController(withIdentifier: "SideMenuNavigationController") as! SideMenuNavigationController
        present(menu, animated: true, completion: nil)
    }
    
    @IBAction func segmentControllClick(_ sender: Any) {
        switch typeSegmentControl.selectedSegmentIndex {
        case 0:
            upcomingSessionView.isHidden = false
            upcomingAssessmentView.isHidden = true
        case 1:
            upcomingSessionView.isHidden = true
            upcomingAssessmentView.isHidden = false
        default:
            break
        }
    }
    
    @IBAction func viewAllSessionAction(_ sender: Any) {
        let vc = self.storyboard?.instantiateViewController(withIdentifier: "SessionListViewController") as! SessionListViewController
        self.navigationController?.pushViewController(vc, animated: true)
    }
    
    @IBAction func viewAllAssessmentAction(_ sender: Any) {
        let vc = self.storyboard?.instantiateViewController(withIdentifier: "AssessmentBeneficiaryViewController") as! AssessmentBeneficiaryViewController
        self.navigationController?.pushViewController(vc, animated: true)
    }
    
}

extension DashboardViewController: DashboardProtocol {
    func sessionListModel(model: [SessionListModel]) {
        if model.isEmpty == false {
            let dateSortedData = model.sorted(by: {$0.date! > $1.date!})
            let timeSortedData = dateSortedData.sorted(by: {$0.startTime! > $1.startTime!})
            var i = 0
            for item in timeSortedData {
                if i < 4 {
                    self.sessionListModel.append(item)
                    i += 1
                }
            }
            self.sessionListTableView.reloadData()
            self.upcomingSessionView.isHidden = false
        } else {
            self.upcomingSessionView.isHidden = true
        }
    }
    
    func assessmentListModel(model: [AssessmentListModel]) {
        if model.isEmpty == false {
            let dateSortedData = model.sorted(by: {$0.startDateTime! > $1.startDateTime!})
            var i = 0
            for item in dateSortedData {
                if i < 4 {
                    self.assessmentListModel.append(item)
                    i += 1
                }
            }
            self.assessmentListTableView.reloadData()
            self.upcomingAssessmentView.isHidden = false
        } else {
            self.upcomingAssessmentView.isHidden = true
        }
    }
    
    func startLoader() {
        ActivityIndicator.start()
    }
    
    func stopLoader() {
        ActivityIndicator.stop()
    }
    
    func showError(error: String) {
        self.view.makeToast(error)
    }
}

extension DashboardViewController: UITableViewDelegate, UITableViewDataSource {
    
    
    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        if tableView == sessionListTableView {
            return sessionListModel.count
        } else {
            return assessmentListModel.count
        }
    }
    
    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        if tableView == sessionListTableView {
            guard let cell = tableView.dequeueReusableCell(withIdentifier: "DashboardSessionListTableViewCell", for: indexPath) as? DashboardSessionListTableViewCell else {
                return UITableViewCell()
            }
            
            cell.selectionStyle = .none
            cell.sessionCustomView.layer.cornerRadius = 10
            cell.sessionNameLabel.text = sessionListModel[indexPath.row].scheduleTitle
            cell.dayDateLabel.text = formattedDateFromString(dateString: sessionListModel[indexPath.row].date!, withFormat: "EEEE, MMM dd, yyyy")
            cell.timeLabel.text = "\(formattedTimeFromString(dateString: sessionListModel[indexPath.row].startTime!, withFormat: "HH:mm") ?? "") - \(formattedTimeFromString(dateString: sessionListModel[indexPath.row].endTime!, withFormat: "HH:mm") ?? "")"
            cell.joinButton.layer.cornerRadius = 5
            cell.joinButton.addTarget(self, action: #selector(joinClass), for: .touchUpInside)
            
            return cell
        } else {
            guard let cell = tableView.dequeueReusableCell(withIdentifier: "DashboardAssessmentListTableViewCell", for: indexPath) as? DashboardAssessmentListTableViewCell else {
                return UITableViewCell()
            }
            
            cell.selectionStyle = .none
            cell.assessmentCustomView.layer.cornerRadius = 10
            cell.assessmentNameLabel.text = assessmentListModel[indexPath.row].assessment?.name
            cell.dayDateLabel.text = " " + (formatDate(dateString: assessmentListModel[indexPath.row].startDateTime!, withFormat: "dd MMM") ?? "") + " "
            cell.timeLabel.text = (formattedTimeFromString(dateString: assessmentListModel[indexPath.row].startDateTime!, withFormat: "HH:mm") ?? "") + " to " + (formattedTimeFromString(dateString: assessmentListModel[indexPath.row].endDateTime!, withFormat: "HH:mm") ?? "")
            cell.activeStatusLabel.text = assessmentListModel[indexPath.row].assessment?.mode
            if assessmentListModel[indexPath.row].assessment?.mode == "Online" {
                cell.statusIndicatorImageView.tintColor = #colorLiteral(red: 0.3843137255, green: 0.6470588235, blue: 0.262745098, alpha: 1)
                cell.startButton.backgroundColor = #colorLiteral(red: 0.00400000019, green: 0.200000003, blue: 0.3919999897, alpha: 1)
                cell.startButton.isEnabled = true
            } else {
                cell.statusIndicatorImageView.tintColor = #colorLiteral(red: 0.7450980544, green: 0.1568627506, blue: 0.07450980693, alpha: 1)
                cell.startButton.backgroundColor = #colorLiteral(red: 0.6666666865, green: 0.6666666865, blue: 0.6666666865, alpha: 1)
                cell.startButton.isEnabled = false
            }
            cell.startButton.tag = indexPath.row
            cell.startButton.addTarget(self, action: #selector(startQuiz), for: .touchUpInside)
            
            return cell
        }
    }
    
    func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
        if tableView == sessionListTableView {
            UIView.animate(withDuration: 0.3) {
                self.sessionListTableView.performBatchUpdates(nil)
            }
        } else {
            UIView.animate(withDuration: 0.3) {
                self.assessmentListTableView.performBatchUpdates(nil)
            }
        }
    }
    
    func tableView(_ tableView: UITableView, didDeselectRowAt indexPath: IndexPath) {
        if tableView == sessionListTableView {
            if let cell = self.sessionListTableView.cellForRow(at: indexPath) as? DashboardSessionListTableViewCell {
                cell.hideDetailView()
            }
        } else {
            if let cell = self.assessmentListTableView.cellForRow(at: indexPath) as? DashboardAssessmentListTableViewCell {
                cell.hideDetailView()
            }
        }
    }
    
    @objc func joinClass(sender: UIButton){
        print(sender.tag)
        guard let url = URL(string: sessionListModel[sender.tag].link ?? "") else { return }
        print(sessionListModel[sender.tag].link ?? "")
        UIApplication.shared.open(url)
    }
    
    @objc func startQuiz(sender: UIButton) {
        let date = Date()
        let format = DateFormatter()
        format.dateFormat = "yyyy-MM-dd HH:mm:ss"
        let time = format.string(from: date)
        let currentTime = format.date(from: time)
        let startTime = format.date(from: assessmentListModel[sender.tag].startDateTime!)
        let endTime = format.date(from: assessmentListModel[sender.tag].endDateTime!)
        
        if currentTime! >= startTime! && currentTime! <= endTime! {
            if assessmentListModel[sender.tag].assessment?.mode == "Online" {
                let vc = self.storyboard?.instantiateViewController(withIdentifier: "InstructionViewController") as! InstructionViewController
                vc.assessmentId = assessmentListModel[sender.tag].assessment?.id ?? 0
                vc.assessmentName = assessmentListModel[sender.tag].assessment?.name ?? ""
                self.navigationController?.pushViewController(vc, animated: true)
            } else {
                let vc = self.storyboard?.instantiateViewController(withIdentifier: "OfflineAssessmentViewController") as! OfflineAssessmentViewController
                let fileType = assessmentListModel[sender.tag].assessment?.fileType
                let fileExtension = fileType!.components(separatedBy: "/")[1]
                vc.fileExtension = fileExtension
                vc.assessmentName = assessmentListModel[sender.tag].assessment?.name ?? ""
                vc.assessmentId = assessmentListModel[sender.tag].assessment?.id ?? 0
                vc.fileId = assessmentListModel[sender.tag].assessment?.fileId ?? ""
                self.navigationController?.pushViewController(vc, animated: true)
            }
        } else if currentTime! >= startTime! && currentTime! >= endTime! {
            Alert.showAlert(on: self, with: "Times Up", message: "Exam is already finished!")
        } else {
            Alert.showAlert(on: self, with: "Upcoming", message: "Exam will start on \(formattedDateFromString(dateString: assessmentListModel[sender.tag].startDateTime!, withFormat: "dd-MMM-yyyy hh:mm a") ?? "")")
        }
    }
}