//
//  CoreDataStack.swift
//  IncidentApp
//
//  Created by Dileep Kumar on 21/03/20.
//  Copyright © 2020 Dileep Kumar. All rights reserved.
//



import Foundation
import CoreData


class CoreDataStack {
    // MARK: - Core Data stack
    private init() {
        
    }
    static var persistentContainer: NSPersistentContainer = {
           /*
            The persistent container for the application. This implementation
            creates and returns a container, having loaded the store for the
            application to it. This property is optional since there are legitimate
            error conditions that could cause the creation of the store to fail.
           */
           let container = NSPersistentContainer(name: "IncidentApp")
           container.loadPersistentStores(completionHandler: { (storeDescription, error) in
               if let error = error as NSError? {
                   // Replace this implementation with code to handle the error appropriately.
                   // fatalError() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development.
                    
                   /*
                    Typical reasons for an error here include:
                    * The parent directory does not exist, cannot be created, or disallows writing.
                    * The persistent store is not accessible, due to permissions or data protection when the device is locked.
                    * The device is out of space.
                    * The store could not be migrated to the current model version.
                    Check the error message to determine what the actual problem was.
                    */
                   fatalError("Unresolved error \(error), \(error.userInfo)")
               }
           })
           return container
       }()

       // MARK: - Core Data Saving support

    class func saveContext () {
        let context = CoreDataStack.persistentContainer.viewContext
           if context.hasChanges {
               do {
                   try context.save()
               } catch {
                   // Replace this implementation with code to handle the error appropriately.
                   // fatalError() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development.
                   let nserror = error as NSError
                   fatalError("Unresolved error \(nserror), \(nserror.userInfo)")
               }
           }
       }
}
