//
//  Relationship.ToManyUnordered.swift
//  CoreStore
//
//  Copyright © 2020 John Rommel Estropia
//
//  Permission is hereby granted, free of charge, to any person obtaining a copy
//  of this software and associated documentation files (the "Software"), to deal
//  in the Software without restriction, including without limitation the rights
//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
//  copies of the Software, and to permit persons to whom the Software is
//  furnished to do so, subject to the following conditions:
//
//  The above copyright notice and this permission notice shall be included in all
//  copies or substantial portions of the Software.
//
//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
//  SOFTWARE.
//

import CoreData
import Foundation


// MARK: - Deprecated

@available(*, deprecated, message: """
Legacy `Value.*`, `Transformable.*`, and `Relationship.*` declarations will soon be obsoleted. Please migrate your models and stores to new models that use `@Field.*` property wrappers. See: https://github.com/JohnEstropia/CoreStore?tab=readme-ov-file#new-field-property-wrapper-syntax
""")
extension RelationshipContainer {

    public final class ToManyUnordered<D: CoreStoreObject>: ToManyRelationshipKeyPathStringConvertible, RelationshipProtocol {
        
        public convenience init(
            _ keyPath: KeyPathString,
            deleteRule: DeleteRule = .nullify,
            minCount: Int = 0,
            maxCount: Int = 0,
            versionHashModifier: @autoclosure @escaping () -> String? = nil,
            renamingIdentifier: @autoclosure @escaping () -> String? = nil,
            affectedByKeyPaths: @autoclosure @escaping () -> Set<String> = []) {

            self.init(
                keyPath: keyPath,
                inverseKeyPath: { nil },
                deleteRule: deleteRule,
                minCount: minCount,
                maxCount: maxCount,
                versionHashModifier: versionHashModifier(),
                renamingIdentifier: renamingIdentifier(),
                affectedByKeyPaths: affectedByKeyPaths()
            )
        }
        
        public convenience init(
            _ keyPath: KeyPathString,
            inverse: @escaping (D) -> RelationshipContainer<D>.ToOne<O>,
            deleteRule: DeleteRule = .nullify,
            minCount: Int = 0,
            maxCount: Int = 0,
            versionHashModifier: @autoclosure @escaping () -> String? = nil,
            renamingIdentifier: @autoclosure @escaping () -> String? = nil,
            affectedByKeyPaths: @autoclosure @escaping () -> Set<String> = []) {

            self.init(
                keyPath: keyPath,
                inverseKeyPath: { inverse(D.meta).keyPath },
                deleteRule: deleteRule,
                minCount: minCount,
                maxCount: maxCount,
                versionHashModifier: versionHashModifier(),
                renamingIdentifier: renamingIdentifier(),
                affectedByKeyPaths: affectedByKeyPaths()
            )
        }
        
        public convenience init(
            _ keyPath: KeyPathString,
            inverse: @escaping (D) -> RelationshipContainer<D>.ToManyOrdered<O>,
            deleteRule: DeleteRule = .nullify,
            minCount: Int = 0,
            maxCount: Int = 0,
            versionHashModifier: @autoclosure @escaping () -> String? = nil,
            renamingIdentifier: @autoclosure @escaping () -> String? = nil,
            affectedByKeyPaths: @autoclosure @escaping () -> Set<String> = []) {

            self.init(
                keyPath: keyPath,
                inverseKeyPath: { inverse(D.meta).keyPath },
                deleteRule: deleteRule,
                minCount: minCount,
                maxCount: maxCount,
                versionHashModifier: versionHashModifier(),
                renamingIdentifier: renamingIdentifier(),
                affectedByKeyPaths: affectedByKeyPaths()
            )
        }
        
        public convenience init(
            _ keyPath: KeyPathString,
            inverse: @escaping (D) -> RelationshipContainer<D>.ToManyUnordered<O>,
            deleteRule: DeleteRule = .nullify,
            minCount: Int = 0,
            maxCount: Int = 0,
            versionHashModifier: @autoclosure @escaping () -> String? = nil,
            renamingIdentifier: @autoclosure @escaping () -> String? = nil,
            affectedByKeyPaths: @autoclosure @escaping () -> Set<String> = []) {

            self.init(
                keyPath: keyPath,
                inverseKeyPath: { inverse(D.meta).keyPath },
                deleteRule: deleteRule,
                minCount: minCount,
                maxCount: maxCount,
                versionHashModifier: versionHashModifier(),
                renamingIdentifier: renamingIdentifier(),
                affectedByKeyPaths: affectedByKeyPaths()
            )
        }
        
        public var value: ReturnValueType {

            get {

                return Set(self.nativeValue.map({ D.cs_fromRaw(object: $0 as! NSManagedObject) }))
            }
            set {

                self.nativeValue = NSSet(array: newValue.map({ $0.rawObject! }))
            }
        }

        public var cs_keyPathString: String {

            return self.keyPath
        }

        public typealias ObjectType = O
        public typealias DestinationValueType = D

        public typealias ReturnValueType = Set<DestinationValueType>

        internal let keyPath: KeyPathString

        internal let entityDescriptionValues: () -> RelationshipProtocol.EntityDescriptionValues
        internal var rawObject: CoreStoreManagedObject?

        internal var nativeValue: NSSet {

            get {

                Internals.assert(
                    self.rawObject != nil,
                    "Attempted to access values from a \(Internals.typeName(O.self)) meta object. Meta objects are only used for querying keyPaths and infering types."
                )
                return withExtendedLifetime(self.rawObject!) { (object) in

                    Internals.assert(
                        object.isRunningInAllowedQueue() == true,
                        "Attempted to access \(Internals.typeName(O.self))'s value outside it's designated queue."
                    )
                    return object.getValue(
                        forKvcKey: self.keyPath,
                        didGetValue: { ($0 as! NSSet?) ?? [] }
                    )
                }
            }
            set {

                Internals.assert(
                    self.rawObject != nil,
                    "Attempted to access values from a \(Internals.typeName(O.self)) meta object. Meta objects are only used for querying keyPaths and infering types."
                )
                return withExtendedLifetime(self.rawObject!) { (object) in

                    Internals.assert(
                        object.isRunningInAllowedQueue() == true,
                        "Attempted to access \(Internals.typeName(O.self))'s value outside it's designated queue."
                    )
                    Internals.assert(
                        object.isEditableInContext() == true,
                        "Attempted to update a \(Internals.typeName(O.self))'s value from outside a transaction."
                    )
                    object.setValue(
                        newValue,
                        forKvcKey: self.keyPath
                    )
                }
            }
        }

        internal var valueForSnapshot: Any? {

            return Set(self.value.map({ $0.objectID() }))
        }

        private init(keyPath: KeyPathString, inverseKeyPath: @escaping () -> KeyPathString?, deleteRule: DeleteRule, minCount: Int, maxCount: Int, versionHashModifier: @autoclosure @escaping () -> String?, renamingIdentifier: @autoclosure @escaping () -> String?, affectedByKeyPaths: @autoclosure @escaping () -> Set<String>) {

            self.keyPath = keyPath
            self.entityDescriptionValues = {
                let range = (Swift.max(0, minCount) ... maxCount)
                return (
                    isToMany: true,
                    isOrdered: false,
                    deleteRule: deleteRule.nativeValue,
                    inverse: (type: D.self, keyPath: inverseKeyPath()),
                    versionHashModifier: versionHashModifier(),
                    renamingIdentifier: renamingIdentifier(),
                    affectedByKeyPaths: affectedByKeyPaths(),
                    minCount: range.lowerBound,
                    maxCount: range.upperBound
                )
            }
        }
    }
}

@available(*, deprecated, message: """
Legacy `Value.*`, `Transformable.*`, and `Relationship.*` declarations will soon be obsoleted. Please migrate your models and stores to new models that use `@Field.*` property wrappers. See: https://github.com/JohnEstropia/CoreStore?tab=readme-ov-file#new-field-property-wrapper-syntax
""")
extension RelationshipContainer.ToManyUnordered: Sequence {

    public var count: Int {

        return self.nativeValue.count
    }
    
    public var isEmpty: Bool {

        return self.nativeValue.count == 0
    }

    public typealias Iterator = AnyIterator<D>

    public func makeIterator() -> Iterator {

        var iterator = self.nativeValue.makeIterator()
        return AnyIterator({ iterator.next().flatMap({ D.cs_fromRaw(object: $0 as! NSManagedObject) }) })
    }
}

@available(*, deprecated, message: """
Legacy `Value.*`, `Transformable.*`, and `Relationship.*` declarations will soon be obsoleted. Please migrate your models and stores to new models that use `@Field.*` property wrappers. See: https://github.com/JohnEstropia/CoreStore?tab=readme-ov-file#new-field-property-wrapper-syntax
""")
extension RelationshipContainer.ToManyUnordered {

    public static func .= <S: Sequence>(_ relationship: RelationshipContainer<O>.ToManyUnordered<D>, _ newValue: S) where S.Iterator.Element == D {

        relationship.nativeValue = NSSet(array: newValue.map({ $0.rawObject! }))
    }
    
    public static func .= <O2>(_ relationship: RelationshipContainer<O>.ToManyUnordered<D>, _ relationship2: RelationshipContainer<O2>.ToManyUnordered<D>) {

        relationship.nativeValue = relationship2.nativeValue
    }
    
    public static func .= <O2>(_ relationship: RelationshipContainer<O>.ToManyUnordered<D>, _ relationship2: RelationshipContainer<O2>.ToManyOrdered<D>) {

        relationship.nativeValue = NSSet(set: relationship2.nativeValue.set)
    }
    
    public static func .== (_ relationship: RelationshipContainer<O>.ToManyUnordered<D>, _ set: Set<D>) -> Bool {

        return relationship.nativeValue.isEqual(to: Set(set.map({ $0.rawObject! })))
    }
    
    public static func .== (_ set: Set<D>, _ relationship: RelationshipContainer<O>.ToManyUnordered<D>) -> Bool {

        return relationship.nativeValue.isEqual(to: Set(set.map({ $0.rawObject! })))
    }
    
    public static func .== <O2>(_ relationship: RelationshipContainer<O>.ToManyUnordered<D>, _ relationship2: RelationshipContainer<O2>.ToManyUnordered<D>) -> Bool {

        return relationship.nativeValue.isEqual(relationship2.nativeValue)
    }
}