//
//  GuestUserInfoRemoteAPI.swift
//  PaiaiDataKit
//
//  Created by FFIB on 2018/12/26.
//  Copyright © 2018 FFIB. All rights reserved.
//

import Foundation
import RxSwift

struct GuestUserInfoRemoteAPI: UserInfoRemoteAPI {

    private func parse(_ json: JSON) -> UserInfo? {
        guard let data  = json["data"] as? [String: AnyObject] else { return nil }
        return UserInfo(json: data)
    }

    func login() -> Single<UserInfo> {
        let contentResource = ContentResource(path: .guestLogin,
                                              parameter: ["uuid": getUUID()],
                                              parseJSON: parse)
        return contentResource.loadContent()
    }

    func getUUID() -> String {
        let keyChainDic = NSMutableDictionary()
        keyChainDic.setObject(String(kSecClassGenericPassword), forKey: kSecClass as! NSCopying)
        keyChainDic.setObject("uuid", forKey: kSecAttrAccount as! NSCopying)
        keyChainDic.setObject(kCFBooleanTrue as Any, forKey: kSecReturnAttributes as! NSCopying)
        keyChainDic.setObject(kCFBooleanTrue as Any, forKey: kSecReturnData as! NSCopying)

        var result: AnyObject?
        var uuid: String?
        SecItemCopyMatching(keyChainDic, &result)
        if let resultDic = result as? NSDictionary {
            if let data = resultDic.object(forKey: kSecValueData) as? Data {
                uuid = NSString(data: data, encoding: String.Encoding.ascii.rawValue) as String?
            }
        }

        if let uuid = uuid { return uuid }
        let uuidStr = UUID().uuidString
        let data = uuidStr.data(using: .ascii)
        keyChainDic.setObject(data!, forKey: kSecValueData as! NSCopying)
        SecItemAdd(keyChainDic, nil)
        return uuidStr
    }
}