notes/Notes/PersistenceController.swift

//
//  PersistenceController.swift
//  Notes
//
//  Created by Claude Code on 13/10/2025.
//

import CoreData

struct PersistenceController {
    static let shared = PersistenceController()

    static var preview: PersistenceController = {
        let result = PersistenceController(inMemory: true)
        let viewContext = result.container.viewContext

        // Create sample notes for preview
        for i in 0..<3 {
            let newNote = Note(context: viewContext)
            newNote.content = "Sample note \(i + 1)\n\nThis is some sample content for testing."
            newNote.lastEditDate = Date()
        }

        do {
            try viewContext.save()
        } catch {
            let nsError = error as NSError
            fatalError("Unresolved error \(nsError), \(nsError.userInfo)")
        }
        return result
    }()

    let container: NSPersistentCloudKitContainer

    init(inMemory: Bool = false) {
        container = NSPersistentCloudKitContainer(name: "Notes")

        if inMemory {
            container.persistentStoreDescriptions.first!.url = URL(fileURLWithPath: "/dev/null")
        }

        container.loadPersistentStores(completionHandler: { (storeDescription, error) in
            if let error = error as NSError? {
                fatalError("Unresolved error \(error), \(error.userInfo)")
            }
        })

        container.viewContext.mergePolicy = NSMergeByPropertyStoreTrumpMergePolicy
        container.viewContext.automaticallyMergesChangesFromParent = true
    }

    func save() {
        let context = container.viewContext
        if context.hasChanges {
            do {
                try context.save()
            } catch {
                let nsError = error as NSError
                print("Unresolved error \(nsError), \(nsError.userInfo)")
            }
        }
    }
}