// Copyright 2023 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

import Foundation

/** @class UserMetadata
    @brief A data class representing the metadata corresponding to a Firebase user.
 */

@objc(FIRUserMetadata) public class UserMetadata: NSObject, NSSecureCoding {
  /** @property lastSignInDate
      @brief Stores the last sign in date for the corresponding Firebase user.
   */
  @objc public let lastSignInDate: Date?

  /** @property creationDate
      @brief Stores the creation date for the corresponding Firebase user.
   */
  @objc public let creationDate: Date?

  // TODO: Nothing public below here
  @objc public init(withCreationDate creationDate: Date?, lastSignInDate: Date?) {
    self.creationDate = creationDate
    self.lastSignInDate = lastSignInDate
  }

  // MARK: Secure Coding

  private static let kCreationDateCodingKey = "creationDate"
  private static let kLastSignInDateCodingKey = "lastSignInDate"

  public static var supportsSecureCoding: Bool {
    return true
  }

  public func encode(with coder: NSCoder) {
    coder.encode(creationDate, forKey: UserMetadata.kCreationDateCodingKey)
    coder.encode(lastSignInDate, forKey: UserMetadata.kLastSignInDateCodingKey)
  }

  public required convenience init?(coder: NSCoder) {
    let creationDate = coder.decodeObject(of: [NSDate.self],
                                          forKey: UserMetadata.kCreationDateCodingKey) as? Date
    let lastSignInDate = coder.decodeObject(of: [NSDate.self],
                                            forKey: UserMetadata.kLastSignInDateCodingKey) as? Date
    self.init(withCreationDate: creationDate, lastSignInDate: lastSignInDate)
  }
}