//
//  Persistence.swift
//  Werkout_ios
//
//  Created by Trey Tartt on 6/13/23.
//

import CoreData
import SharedCore

struct PersistenceController {
    static let shared = PersistenceController()
    private static let runtimeReporter = RuntimeReporter.shared

    static var preview: PersistenceController = {
        let result = PersistenceController(inMemory: true)
        let viewContext = result.container.viewContext
        for _ in 0..<10 {
            let newItem = Item(context: viewContext)
            newItem.timestamp = Date()
        }
        do {
            try viewContext.save()
        } catch {
            let nsError = error as NSError
            runtimeReporter.recordError(
                "Failed to save preview context",
                metadata: [
                    "code": "\(nsError.code)",
                    "domain": nsError.domain
                ]
            )
        }
        return result
    }()

    let container: NSPersistentContainer

    init(inMemory: Bool = false) {
        container = NSPersistentContainer(name: "Werkout_ios")
        if inMemory {
            container.persistentStoreDescriptions.first?.url = URL(fileURLWithPath: "/dev/null")
        }
        container.loadPersistentStores(completionHandler: { (storeDescription, error) in
            if let error = error as NSError? {
                Self.runtimeReporter.recordError(
                    "Failed to load persistent store",
                    metadata: [
                        "code": "\(error.code)",
                        "domain": error.domain
                    ]
                )
            }
        })
        container.viewContext.automaticallyMergesChangesFromParent = true
    }
}