/*

    Copyright (C) 2016 Apple Inc. All Rights Reserved.

    See LICENSE.txt for this sample’s licensing information

    Abstract:

    Extends `Payment` to allow it to be represented as and initialized with an `NSDictionary`.

*/

import Foundation

extension Payment: DictionaryRepresentable {

    // MARK: Types

    private struct DictionaryKeys {

        static let contact = "contact"

        static let amount = "amount"

        static let currencyCode = "currencyCode"

        static let date = "date"

    }

    // MARK: DictionaryRepresentable

    var dictionaryRepresentation: [String : Any] {

        var dictionary = [String: Any]()

        dictionary[DictionaryKeys.contact] = contact.dictionaryRepresentation

        dictionary[DictionaryKeys.amount] = amount.doubleValue

        dictionary[DictionaryKeys.currencyCode] = currencyCode

        if let date = date {

            dictionary[DictionaryKeys.date] = date

        }

        return dictionary

    }

    init?(dictionaryRepresentation dictionary: [String: Any]) {

        guard let contactDictionary = dictionary[DictionaryKeys.contact] as? [String: AnyObject], let contact = Contact(dictionaryRepresentation: contactDictionary) else { return nil }

        guard let doubleAmount = dictionary[DictionaryKeys.amount] as? Double else { return nil }

        guard let currencyCode = dictionary[DictionaryKeys.currencyCode] as? String else { return nil }

        let date = dictionary[DictionaryKeys.date] as? Date

        self.contact = contact

        self.amount = NSDecimalNumber(value: doubleAmount)

        self.currencyCode = currencyCode

        self.date = date

    }

}