ViewController.swift

//
//  ViewController.swift
//  EventKit
//
//  Created by Dai Long on 7/21/18.
//  Copyright © 2018 Dai Long. All rights reserved.
//

import UIKit
import EventKit
import EventKitUI

class Task {
    var title: String
    var isCompleted: Bool = false
    
    init(title: String) {
        self.title  = title
    }
}

class ViewController: UIViewController {
    // MARK: - IBOutlets
    @IBOutlet weak var tableView: UITableView!
    var isAccessToEventStoreGranted: Bool = false
    
    var eventStore: EKEventStore = EKEventStore()

    var calendars: [EKCalendar] = []
    var tasks: [Task] = []
    
    
    func updateAuthorizationStatusToAccessEventStore() {
        let authorizationStatus = EKEventStore.authorizationStatus(for: .event)
        switch authorizationStatus {
        case .authorized:
            print("The app is authorized to access the service.")

        case .denied, .restricted:
            print("The user explicitly denied access to the service for the app.")
            
        case .notDetermined:
            print("The user has not yet made a choice regarding whether the app may access the service.")
            self.isAccessToEventStoreGranted = true
            eventStore.requestAccess(to: .reminder) { (isAccessToEventStoreGranted, error: Error?) in
                if let error = error {
                    print("Error: \(error.localizedDescription)")
                    return
                }
                
                if isAccessToEventStoreGranted == true {
                  //  self.loadCalendar()
                }
            }
        }
    }
    
    func loadCalendar() {
        calendars = eventStore.calendars(for: .event)
    //    tableView.reloadData()
    }
    
    override func viewDidLoad() {
        super.viewDidLoad()
        setupTableView()
        updateAuthorizationStatusToAccessEventStore()
        
        for i in 1...10 {
            let task = Task(title: "title \(i)")
            tasks.append(task)
        }
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }


}

extension ViewController: UITableViewDelegate, UITableViewDataSource {
    fileprivate func setupTableView() {
        tableView.delegate = self
        tableView.dataSource = self
        tableView.register(UITableViewCell.self, forCellReuseIdentifier: "cell")
    }
    
    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        //return calendars.count
        return tasks.count
    }
    
    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath)
        cell.textLabel?.text = tasks[indexPath.row].title
     //   cell.textLabel?.text = calendars[indexPath.row].title
        return cell
    }
    
    func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
        let cell = tableView.cellForRow(at: indexPath)

        let reminder = EKReminder.init(eventStore: eventStore)
        reminder.title = cell?.textLabel?.text ?? "default"
        reminder.calendar = eventStore.defaultCalendarForNewReminders()

        
        let date = Date.init().addingTimeInterval(60)
        let alarm = EKAlarm.init(absoluteDate: date)

        reminder.addAlarm(alarm)
        do {
            try eventStore.save(reminder, commit: true)
            print("save success!")
        }
        catch let error {
            print("Couldnt Save: \(error.localizedDescription)")
        }
    }
}