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

import UIKit
import Toast_Swift
import SideMenu

class SessionListViewController: UIViewController {
    
    @IBOutlet var navigationBar: UINavigationBar!
    @IBOutlet var contentScrollView: UIScrollView!
    @IBOutlet var customView: UIView!
//    @IBOutlet var interventionLabel: UILabel!
//    @IBOutlet var interventionTF: UITextField!
//    @IBOutlet var interventionLevelLabel: UILabel!
//    @IBOutlet var interventionLevelTF: UITextField!
//    @IBOutlet var batchLabel: UILabel!
//    @IBOutlet var batchTF: UITextField!
    @IBOutlet var monthYearLabel: UILabel!
    @IBOutlet var monthYearTF: UITextField!
    @IBOutlet var sessionListTableView: UITableView!
    @IBOutlet var filterButton: UIButton!
    @IBOutlet var sessionTableHeightConstraint: NSLayoutConstraint!
    
    var viewModel = SessionListViewModel()
    var sessionListModel = [SessionListModel]()
    var interventionModel = [SessionInterventionModel]()
    var interventionLevelModel = [InterventionLevel]()
    var batchListModel = [BatchListModel]()
    
    fileprivate let picker = ToolbarPickerView()
    var activeTextField = 0
    let userData = DBManager.sharedInstance.database.objects(UserDetailsModel.self)
    var interventionId = Int()
    var batchId = Int()
    var interventionLevelId = Int()
    var monthYear = String()
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        // Do any additional setup after loading the view.
        setupUI()
        viewModel.delegate = self
        sessionListTableView.delegate = self
        sessionListTableView.dataSource = self
        sessionListTableView.addObserver(self, forKeyPath: "contentSize", options: .new, context: nil)
        
        //getInterventionList()
        
        // Set UITableViewAutomaticDimension for automatic cell height calculation.
        sessionListTableView.rowHeight = UITableView.automaticDimension
        sessionListTableView.estimatedRowHeight = 240 // Estimated average cell height, adjust as needed.
    }
    
    override func viewWillAppear(_ animated: Bool) {
        getSessionList(month: getCurrentMonth())
        createPickerView()
    }

    override func observeValue(forKeyPath keyPath: String?, of object: Any?, change: [NSKeyValueChangeKey : Any]?, context: UnsafeMutableRawPointer?) {
        if(keyPath == "contentSize") {
            if let newvalue = change?[.newKey] {
                DispatchQueue.main.async {
                    let newsize  = newvalue as! CGSize
                    self.sessionTableHeightConstraint.constant = newsize.height
                }
            }
        }
    }
    
    func setupUI() {
        navigationBar.topItem?.title = "Session List"
        // Hide unused fields
//        interventionLabel.isHidden = true
//        interventionTF.isHidden = true
//        interventionLevelLabel.isHidden = true
//        interventionLevelTF.isHidden = true
//        batchLabel.isHidden = true
//        batchTF.isHidden = true
        customView.isHidden = false
        customView.layer.cornerRadius = 10
//        interventionTF.isUserInteractionEnabled = true
//        interventionLevelTF.isUserInteractionEnabled = false
//        batchTF.isUserInteractionEnabled = false
        filterButton.layer.cornerRadius = filterButton.frame.size.height / 2
        
        let dateFormatter = DateFormatter()
        dateFormatter.dateFormat = "MM-yyyy"
        let currentDate = Date()
        let formattedDate = dateFormatter.string(from: currentDate)
        // Set the formatted date as the text of the UITextField
        monthYearTF.text = formattedDate
    }
    
    func createPickerView() {
        monthYearTF.delegate = self
        self.monthYearTF.datePicker(target: self,
                                          doneAction: #selector(doneAction),
                                          cancelAction: #selector(cancelAction),
                                          datePickerMode: .date)
//        //1
//        self.interventionTF.delegate = self
//        self.interventionTF.inputView = self.picker
//        self.interventionTF.inputAccessoryView = self.picker.toolbar
//        //2
//        self.interventionLevelTF.delegate = self
//        self.interventionLevelTF.inputView = self.picker
//        self.interventionLevelTF.inputAccessoryView = self.picker.toolbar
//        //3
//        self.batchTF.delegate = self
//        self.batchTF.inputView = self.picker
//        self.batchTF.inputAccessoryView = self.picker.toolbar
//        
//        self.picker.delegate = self
//        self.picker.dataSource = self
//        self.picker.toolbarDelegate = self
    }
    
    @objc func cancelAction() {
        self.monthYearTF.resignFirstResponder()
    }
    
    @objc func doneAction() {
        if let datePickerView = self.monthYearTF.inputView as? UIDatePicker {
            let dateFormatter = DateFormatter()
            dateFormatter.dateFormat = "MM-yyyy"
            let dateString = dateFormatter.string(from: datePickerView.date)
            self.monthYearTF.text = dateString
            
            print(datePickerView.date)
            print(dateString)
            self.getSessionList(month: self.monthYearTF.text ?? "")
            self.monthYearTF.resignFirstResponder()
        }
    }
    
    func getSessionList(month:String) {
        if Reachability.isConnectedToNetwork() {
            viewModel.getSessionList(userId: userData[0].id, interventionId: "", batchId: "", schoolId: "", interventionLevelId: "", month: month)
        } else {
            Alert.showInternetFailureAlert(on: self)
        }
    }
    
    func getInterventionList() {
        if Reachability.isConnectedToNetwork() {
            viewModel.getSessionIntervention()
        } else {
            Alert.showInternetFailureAlert(on: self)
        }
    }
    
    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 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
    }
    
    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()
        DispatchQueue.main.asyncAfter(deadline: .now() + 60.0) { [weak self] in
            self?.executeRepeatedly()
        }
    }
    
    
    /*
     // 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 filterAction(_ sender: Any) {
        if customView.isHidden == true {
            customView.isHidden = false
            //contentScrollView.scrollToTop()
            contentScrollView.scrollViewToTop(customView)
        } else {
            customView.isHidden = true
        }
    }
}

extension SessionListViewController: SessionListProtocol {
    func startLoader() {
        ActivityIndicator.start()
    }
    
    func stopLoader() {
        ActivityIndicator.stop()
    }
    
    func showError(error: String) {
        self.view.makeToast(error)
    }
    
    func sessionListModel(model: [SessionListModel]) {
        let dateSortedData = model.sorted(by: {$0.date! > $1.date!})
        let timeSortedData = dateSortedData.sorted(by: {$0.startTime! > $1.startTime!})
        self.sessionListModel = timeSortedData
        self.executeRepeatedly()
    }
    
    func interventionModel(model: [SessionInterventionModel]) {
        self.interventionModel = model
        //interventionLevelTF.isUserInteractionEnabled = true
    }
    
    func interventionLevelModel(model: [InterventionLevel]) {
        self.interventionLevelModel = model
        //batchTF.isUserInteractionEnabled = true
    }
    
    func batchListModel(model: [BatchListModel]) {
        self.batchListModel = model
    }
}

//extension SessionListViewController: UIPickerViewDelegate, UIPickerViewDataSource {
//    // MARK: UIPickerView Delegation
//    
//    func numberOfComponents(in pickerView: UIPickerView) -> Int {
//        return 1
//    }
//    
//    func pickerView( _ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
//        switch activeTextField
//        {
//        case 1:
//            return interventionModel.count
//        case 2:
//            return interventionLevelModel.count
//        case 3:
//            return batchListModel.count
//        default:
//            return 0
//            
//        }
//    }
//    
//    func pickerView( _ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
//        switch activeTextField{
//        case 1:
//            return interventionModel[row].interventionName
//        case 2:
//            return interventionLevelModel[row].interventionLevels
//        case 3:
//            return batchListModel[row].batchName
//        default:
//            return ""
//        }
//    }
//    
//    func pickerView( _ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
//        switch activeTextField{
//        case 1:
//            //interventionTF.text = interventionModel[row].interventionName
//            break
//        case 2:
//            //interventionLevelTF.text = interventionLevelModel[row].interventionLevels
//            break
//        case 3:
//            //batchTF.text = batchListModel[row].batchName
//            break
//        default:
//            break
//        }
//    }
//}

//extension SessionListViewController: UITextFieldDelegate {
//    func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
//        switch textField {
//        case interventionTF:
//            return false
//        case interventionLevelTF:
//            return false
//        case batchTF:
//            return false
//        default:
//            return true
//        }
//    }
//    
//    // when user select a textfield, this method will be called
//    func textFieldDidBeginEditing(_ textField: UITextField) {
//        switch textField {
//        case interventionTF:
//            activeTextField = 1
//            picker.reloadAllComponents()
//        case interventionLevelTF:
//            activeTextField = 2
//            picker.reloadAllComponents()
//        case batchTF:
//            activeTextField = 3
//            picker.reloadAllComponents()
//        default:
//            activeTextField = 0
//        }
//    }
//}

//extension SessionListViewController: ToolbarPickerViewDelegate {
//    func didTapDone() {
//        switch activeTextField {
//        case 1:
//            let row = self.picker.selectedRow(inComponent: 0)
//            self.picker.selectRow(row, inComponent: 0, animated: false)
//            self.interventionTF.text = interventionModel[row].interventionName
//            self.interventionId = interventionModel[row].id ?? 0
//            if Reachability.isConnectedToNetwork() {
//                viewModel.getSessionList(userId: userData[0].id, interventionId: self.interventionId, batchId: "", schoolId: "", interventionLevelId: "", month: getCurrentMonth())
//            }
//            self.interventionTF.resignFirstResponder()
//            if Reachability.isConnectedToNetwork() {
//                self.viewModel.getInterventionLevel(id: interventionModel[row].id ?? 0)
//            }
//        case 2:
//            let row = self.picker.selectedRow(inComponent: 0)
//            self.picker.selectRow(row, inComponent: 0, animated: false)
//            self.interventionLevelTF.text = interventionLevelModel[row].interventionLevels
//            self.interventionLevelId = interventionLevelModel[row].id ?? 0
//            if Reachability.isConnectedToNetwork() {
//                viewModel.getSessionList(userId: userData[0].id, interventionId: self.interventionId, batchId: "", schoolId: "", interventionLevelId: self.interventionLevelId, month: getCurrentMonth())
//            }
//            self.interventionLevelTF.resignFirstResponder()
//            if Reachability.isConnectedToNetwork() {
//                self.viewModel.getBatchList()
//            }
//        case 3:
//            let row = self.picker.selectedRow(inComponent: 0)
//            self.picker.selectRow(row, inComponent: 0, animated: false)
//            self.batchTF.text = batchListModel[row].batchName ?? ""
//            self.batchId = batchListModel[row].id ?? 0
//            if Reachability.isConnectedToNetwork() {
//                viewModel.getSessionList(userId: userData[0].id, interventionId: self.interventionId, batchId: self.batchId, schoolId: "", interventionLevelId: self.interventionLevelId, month: getCurrentMonth())
//            }
//            self.batchTF.resignFirstResponder()
//        default:
//            return
//        }
//    }
    
//    func didTapCancel() {
//        switch activeTextField {
//        case 1:
//            self.interventionTF.text = nil
//            self.interventionTF.resignFirstResponder()
//        case 2:
//            self.interventionLevelTF.text = nil
//            self.interventionLevelTF.resignFirstResponder()
//        case 3:
//            self.batchTF.text = nil
//            self.batchTF.resignFirstResponder()
//        default:
//            return
//        }
//    }
//}

extension SessionListViewController: UITableViewDelegate, UITableViewDataSource, UICollectionViewDelegateFlowLayout {
    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return sessionListModel.count
    }
    
    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        guard let cell = tableView.dequeueReusableCell(withIdentifier: "SessionListTableViewCell", for: indexPath) as? SessionListTableViewCell else {
            return UITableViewCell()
        }
        
        cell.listCustomView.layer.cornerRadius = 10
        cell.listCustomView.layer.borderWidth = 1
        cell.listCustomView.layer.borderColor = #colorLiteral(red: 0.8039215803, green: 0.8039215803, blue: 0.8039215803, alpha: 1)
        cell.serialNumberLabel.text = "\(indexPath.row + 1)"
        cell.meetingNameLabel.text = sessionListModel[indexPath.row].scheduleTitle
        cell.batchLabel.text = sessionListModel[indexPath.row].batchName
        cell.teacherLabel.text = "Teacher: \(sessionListModel[indexPath.row].teacherFirstName ?? "") \(sessionListModel[indexPath.row].teacherLastName ?? "")"
        cell.interventionNameLabel.text = "Intervention Name: \(sessionListModel[indexPath.row].interventionName ?? "")"
        cell.dateLabel.text = " " + (formattedDateFromString(dateString: sessionListModel[indexPath.row].date!, withFormat: "dd MMM") ?? "") + " "
        cell.timeLabel.text = (formattedTimeFromString(dateString: sessionListModel[indexPath.row].startTime!, withFormat: "HH:mm") ?? "") + " to " + (formattedTimeFromString(dateString: sessionListModel[indexPath.row].endTime!, withFormat: "HH:mm") ?? "")
        cell.joinClassButton.layer.cornerRadius = 5
        if sessionListModel[indexPath.row].offline == true {
            cell.activeStatusLabel.text = "Online"
            cell.activeIndicatorImageView.tintColor = #colorLiteral(red: 0.3843137255, green: 0.6470588235, blue: 0.262745098, alpha: 1)
            cell.joinClassButton.isHidden = false
        } else {
            cell.activeStatusLabel.text = "Offline"
            cell.activeIndicatorImageView.tintColor = #colorLiteral(red: 0.9098039216, green: 0.2980392157, blue: 0.2470588235, alpha: 1)
            cell.joinClassButton.isHidden = true
        }
        
        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: sessionListModel[indexPath.row].startTime!)?.addingTimeInterval(TimeInterval(10.0 * 60.0))
        let endTime = format.date(from: sessionListModel[indexPath.row].endTime!)?.addingTimeInterval(TimeInterval(20.0 * 60.0))
        
        if currentTime! > startTime! && currentTime! < endTime! {
            cell.joinClassButton.backgroundColor = #colorLiteral(red: 0.00400000019, green: 0.200000003, blue: 0.3919999897, alpha: 1)
            cell.joinClassButton.tag = indexPath.row
            cell.joinClassButton.addTarget(self, action: #selector(joinClass), for: .touchUpInside)
        } else {
            cell.joinClassButton.backgroundColor = UIColor.lightGray
            cell.joinClassButton.isUserInteractionEnabled = false
        }
        
        return cell
    }
    
    @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)
    }
    
    func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
        return UITableView.automaticDimension
    }
    
}

extension SessionListViewController: UITextFieldDelegate {
    // MARK: - UITextFieldDelegate methods
    
    func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
        switch textField {
        case monthYearTF:
            return false
        default:
            return true
        }
    }
}