//
//  UpdateCoreData.swift
//  Meshtastic
//
//  Copyright(c) Garth Vander Houwen 10/3/22.

import CoreData

public func clearPositions(destNum: Int64, context: NSManagedObjectContext) -> Bool {

	let fetchNodeInfoRequest: NSFetchRequest<NSFetchRequestResult> = NSFetchRequest.init(entityName: "NodeInfoEntity")
	fetchNodeInfoRequest.predicate = NSPredicate(format: "num == %lld", Int64(destNum))

	do {

		let fetchedNode = try context.fetch(fetchNodeInfoRequest) as! [NodeInfoEntity]
			
		let newPostions = [PositionEntity]()
		fetchedNode[0].positions? = NSOrderedSet(array: newPostions)
		
		do {
			try context.save()
			return true
			
		} catch {
			context.rollback()
			return false
		}

	} catch {
		print("💥 Fetch NodeInfoEntity Error")
		return false
	}
}

public func clearTelemetry(destNum: Int64, metricsType: Int32, context: NSManagedObjectContext) -> Bool {
	
	let fetchNodeInfoRequest: NSFetchRequest<NSFetchRequestResult> = NSFetchRequest.init(entityName: "NodeInfoEntity")
	fetchNodeInfoRequest.predicate = NSPredicate(format: "num == %lld", Int64(destNum))

	do {

		let fetchedNode = try context.fetch(fetchNodeInfoRequest) as! [NodeInfoEntity]
			
		let emptyTelemetry = [TelemetryEntity]()
		fetchedNode[0].telemetries? = NSOrderedSet(array: emptyTelemetry)
		
		do {
			try context.save()
			return true
			
		} catch {
			context.rollback()
			return false
		}

	} catch {
		print("💥 Fetch NodeInfoEntity Error")
		return false
	}
}

public func clearCoreDataDatabase(context: NSManagedObjectContext) {
	
	let persistenceController = PersistenceController.shared.container

	for i in 0...persistenceController.managedObjectModel.entities.count-1 {
		let entity = persistenceController.managedObjectModel.entities[i]

		//do {
		let query = NSFetchRequest<NSFetchRequestResult>(entityName: entity.name!)
		let deleteRequest = NSBatchDeleteRequest(fetchRequest: query)
			//try context.execute(deleterequest)
			//try context.save()
			
			do {
				try context.executeAndMergeChanges(using: deleteRequest)
			 } catch let error as NSError {
				 print(error)
			 }

		//} catch let error as NSError {
		//	print("Error: \(error.localizedDescription)")
		//	abort()
		//}
	}
}