//
//  AuthenticationManager.swift
//  elpha-ios
//
//  Created by Dwayne Harris on 8/25/18.
//  Copyright © 2018 Elpha. All rights reserved.
//

import CoreData
import Foundation
import UIKit

class AuthenticationManager {
    static let shared = AuthenticationManager()
    
    var sessionCount: Int {
        get {
            let context = (UIApplication.shared.delegate as! AppDelegate).persistentContainer.viewContext
            let request = NSFetchRequest<Session>(entityName: "Session")
            
            do {
                return try context.count(for: request)
            } catch {
                print("Error counting Sessions")
                print("\(error)")
                return 0
            }
        }
    }
    
    var selectedSession: Session? {
        get {
            let context = (UIApplication.shared.delegate as! AppDelegate).persistentContainer.viewContext
            let request = NSFetchRequest<Session>(entityName: "Session")
            request.predicate = NSPredicate(format: "selected = YES")
            
            do {
                let results = try context.fetch(request)
                return results.first
            } catch {
                print("Error fetching Session")
                print("\(error)")
                return nil
            }
        }
    }
    
    private init() {}
}