//
  //  DictionaryTransform.swift
  //  ObjectMapper
  //
  //  Created by Milen Halachev on 7/20/16.
  //  Copyright © 2016 hearst. All rights reserved.
  //
  
  import Foundation
  
  ///Transforms [String: AnyObject] <-> [Key: Value] where Key is RawRepresentable as String, Value is Mappable
  public struct DictionaryTransform<Key, Value>: TransformType where Key: Hashable, Key: RawRepresentable, Key.RawValue == String, Value: Mappable {
  	
  	public init() {
  		
  	}
  	
  	public func transformFromJSON(_ value: Any?) -> [Key: Value]? {
  		
  		guard let json = value as? [String: Any] else {
  			
  			return nil
  		}
  		
  		let result = json.reduce([:]) { (result, element) -> [Key: Value] in
  			
  			guard
  			let key = Key(rawValue: element.0),
  			let valueJSON = element.1 as? [String: Any],
  			let value = Value(JSON: valueJSON)
  			else {
  				
  				return result
  			}
  			
  			var result = result
  			result[key] = value
  			return result
  		}
  		
  		return result
  	}
  	
  	public func transformToJSON(_ value: [Key: Value]?) -> Any? {
  		
  		let result = value?.reduce([:]) { (result, element) -> [String: Any] in
  			
  			let key = element.0.rawValue
  			let value = element.1.toJSON()
  			
  			var result = result
  			result[key] = value
  			return result
  		}
  		
  		return result
  	}
  }