Hinduja-LMS/LMS/View Controller/MeetingListViewController.swift

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

import UIKit

class MeetingListViewController: UIViewController {
    
    @IBOutlet var meetingListTableView: UITableView!
    
    var calendarData = [CalendarModel]()
    var meetingDate = String()
    var meetings = [CalendarModel]()
    var selectedDate = Date()

    override func viewDidLoad() {
        super.viewDidLoad()

        // Do any additional setup after loading the view.
        executeRepeatedly()
        for data in calendarData {
            if data.date == meetingDate {
                meetings.append(data)
            }
        }
//        if let i = calendarData.firstIndex(where: { $0.date == meetingDate }) {
//            meetings.append(calendarData[i])
//        }
        meetingListTableView.delegate = self
        meetingListTableView.dataSource = self
        meetingListTableView.reloadData()
    }
    
    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
    }
    
    private func executeRepeatedly() {
        // put your code here
        meetingListTableView.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.
    }
    */

}

extension MeetingListViewController: UITableViewDelegate, UITableViewDataSource {
    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return meetings.count
    }
    
    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        if meetings[indexPath.row].offline == true {
            guard let cell = tableView.dequeueReusableCell(withIdentifier: "MeetingListTableViewCell", for: indexPath) as? MeetingListTableViewCell else {
                return UITableViewCell()
            }
            cell.customView.layer.cornerRadius = 10
            cell.customView.dropShadow()
            cell.meetingNameLabel.text = meetings[indexPath.row].scheduleTitle
            cell.dayDateLabel.text = formattedDateFromString(dateString: meetings[indexPath.row].date!, withFormat: "EEEE, MMM dd, yyyy")
            cell.timeLabel.text = "\(formattedTimeFromString(dateString: meetings[indexPath.row].startTime!, withFormat: "HH:mm") ?? "") - \(formattedTimeFromString(dateString: meetings[indexPath.row].endTime!, withFormat: "HH:mm") ?? "")"
            cell.joinClassButton.layer.cornerRadius = 5
            
            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: meetings[indexPath.row].startTime!)?.addingTimeInterval(TimeInterval(10.0 * 60.0))
            let endTime = format.date(from: meetings[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
        } else {
            guard let cell = tableView.dequeueReusableCell(withIdentifier: "OfflineMeetingTableViewCell", for: indexPath) as? OfflineMeetingTableViewCell else {
                return UITableViewCell()
            }
            cell.customView.layer.cornerRadius = 10
            cell.customView.dropShadow()
            cell.meetingNameLabel.text = meetings[indexPath.row].scheduleTitle
            cell.dateLabel.text = formattedDateFromString(dateString: meetings[indexPath.row].date!, withFormat: "EEEE, MMM dd, yyyy")
            cell.timeLabel.text = "\(formattedTimeFromString(dateString: meetings[indexPath.row].startTime!, withFormat: "HH:mm") ?? "") - \(formattedTimeFromString(dateString: meetings[indexPath.row].endTime!, withFormat: "HH:mm") ?? "")"
            
            return cell
        }
    }
    
    @objc func joinClass(sender: UIButton){
        print(sender.tag)
        guard let url = URL(string: meetings[sender.tag].link ?? "") else { return }
        print(meetings[sender.tag].link ?? "")
        UIApplication.shared.open(url)
    }

}