import SwiftData

@Model
class Trip {
  var name: String
  var destination: String
  var endDate: Date
  var startDate: Date

  var bucketList: [BucketListItem]? = []
  var livingAccommodation: LivingAccommodation?
}

public protocol Storable {
  associatedtype RealmObject: RealmSwift.Object
  associatedtype PropertyValue: PropertyValueType

  /// 데이터 모델의 식별자로 사용되는 프로퍼티
  var identifier: Int { get }

  init(realmObject: RealmObject)
  func realmObject() -> RealmObject
}

@Attribute(.unique) var name: String

@Attribute(originalName: "start_date") var startDate: Date

@Relationship(.cascade) var bucketList: [BucketListItem]? = []

@Transient var tripViews: Int = 0

enum SampleTripSchemaV1: VersionedSchema {
  static var models: [any PersistentModel.Type] {
    [Trip.self, BucketListItem.self, LivingAccommodation.self]
  }

  @Model
  final class Trip {
    var name: String
    var destination: String
    var start_date: Date
    var end_date: Date

    var bucketList: [BucketListItem]? = []
    var livingAccommodation: LivingAccommodation?
}

enum SampleTripSchemaV2: VersionedSchema {
  static var models: [any PersistentModel.Type] {
    [Trip.self, BucketListItem.self, LivingAccommodation.self]
  }

  @Model
  final class Trip {
    @Attribute(.unique) var name: String
    var destination: String
    @Attribute(originalName: "srart_date") var startDate: Date
    @Attribute(originalName: "end_date") var endDate: Date

    var bucketList: [BucketListItem]? = []
    var livingAccommodation: LivingAccommodation?
}

enum SampleTripsMigrationPlan: SchemaMigrationPlan {
  static var schemas: [any VersionedSchema.Type) {
    [SampleTripsSchemaV1.self, SampletripsSchemaV2.self, SampleTripSchemaV3.self]

  static var stages: [MigrationStage] {
    [migrateV1toV2]
  }

  static let migrateV1toV2 = MigrationStage.custom(
    fromVersion: SampleTripSchemaV1.self
    toVersion: SampleTripSchema2.self    ,
    willMigrate: { context in
      let trips = try? context.fetch(FetchDescriptor<SampleTripsSchemaV1.Trip>())
      try? context.save()  
    }, didMigrate: nil
  )
}

import SwiftData

let container = try ModelContainer(for: [Trip.self,
                                         BucketListItem.self,
                                         LiveAccommodation.self])  

import SwiftData

let container = try ModelContainer(for: [Trip.self, LivingAccommodation.self],
                                   configuration: ModelConfiguration(url: URL("path")))         

let fullSchema = Schema([Trip.self,
                         BucketListItem.self,
                         LivingAccommodations.self,
                         Person.self,
                         Address.self])

let trips = ModelConfiguration(schema: Schema([Trip.self,
                                               BucketListItem.self,
                                               LivingAccommodations.self]),
                               url: URL(filePath: "/path/to/trip.store"),
                               cloudKitContainerIdentifier: "com.example.trips")

let people = ModelConfiguration(schema: Schema([Person.self,
                                                Address.self]),
                                url: URL(filePath: "/path/to/people.store"),
                                cloudKitContainerIdentifier: "com.example.people")

let container = try ModelContainer(for: fullSchema, trips, people)    

import SwiftData

let context = container.mainContext
let context = ModelContext(container)  

.modelContainer(for: Trip.self, isAutosaveEnabled: false)

let tripPredicate = #Predicate<Trip> { $0.destination == "New York" }

let tripPredicate = #Predicate<Trip> {
  $0.destination == "New York" &&
  $0.name.contains("birthday")
}

let descriptor = FetchDescriptor<Trip>(predicate: tripPredicate)

let trips = try context.fetch(descriptor)

let descriptor = FetchDescriptor<Trip>(
  sortBy: SortDescriptor(\Trip.name),
  predicate: tripPredicate
)      

let trips = try context.fetch(descriptor)

context.enumerate(descriptor
                  batchSize: 10000
                  allowEscapingMutations: true) { trip in
  // operate on trip
}

var myTrip = Trip(name: "Birthday Trip", destination: "New York")

// Create
context.insert(myTrip)

// Delete
context.delete(myTrip)

try context.save()