//
//  UserInfo.swift
//  HuaXueQuan
//
//  Created by yangbin on 15/9/9.
//  Copyright © 2015年 hxq. All rights reserved.
//

import UIKit
extension UserDefaults {
    struct Account: BoolUserDefaultable, StringUserDefaultable, IntUserDefaultable{
        enum BoolDefaultKey: String  {
            case isUserLoggedIn
            case isAudit
        }
        enum StringDefaultKey: String {
            case userId
            case username
            case token
            case photoPath
            case name
            case country
            case province
            case city
            case sex
            case phonenumber
            case realName
        }
        enum IntDefaultKey: String {
            case age
        }
        static func removeAll(){
            UserDefaults.standard.removePersistentDomain(forName: Bundle.main.bundleIdentifier ?? "")
        }
    }
}

private let tokenKey = "tokenKey"
private let userIdKey = "userIdKey"

var SharedUserInfo: UserInfo {
    get {
        return UserInfo.sharedUserInfo
    }
}

class UserInfo: NSObject {

    static let sharedUserInfo = UserInfo()
    var isLogin: Bool {
        get {
            return UserDefaults.Account.bool(forKey: .isUserLoggedIn)
        }
    }
    var userName = ""
    var password = ""
    var userId = ""
    var token = ""
    var photoPath = ""
    var name = ""
    var age = 0
    var country = ""
    var province = ""
    var city = ""
    var sex = ""

    var uuid: String {
        get {
            let keyChainDic = NSMutableDictionary()
            keyChainDic.setObject(String(kSecClassGenericPassword), forKey: kSecClass as! NSCopying)
            keyChainDic.setObject("uuid", forKey: kSecAttrAccount as! NSCopying)
            keyChainDic.setObject(kCFBooleanTrue, forKey: kSecReturnAttributes as! NSCopying)
            keyChainDic.setObject(kCFBooleanTrue, forKey: kSecReturnData as! NSCopying)

            var result: AnyObject?
            var uuidStr: String? = nil
            SecItemCopyMatching(keyChainDic, &result)
            if let resultDic = result as? NSDictionary {
                if let data = resultDic.object(forKey: kSecValueData) as? Data {
                    uuidStr = NSString(data: data, encoding: String.Encoding.ascii.rawValue) as String?
                }
            }
            if uuidStr == nil {
                uuidStr = UUID().uuidString
                let data = uuidStr!.data(using: String.Encoding.ascii)
                keyChainDic.setObject(data!, forKey: kSecValueData as! NSCopying)
                SecItemAdd(keyChainDic, nil)
            }
            return uuidStr!
        }
    }

    func deleteSecurity() {
        let queryDic: [String : AnyObject] = [String(kSecClass): kSecClassGenericPassword, String(kSecAttrAccount): userIdKey.digestString(algorithm: .md5) as AnyObject]
        SecItemDelete(queryDic as CFDictionary)
    }

    func saveScurity() {

        let keyChainDic = NSMutableDictionary()
        keyChainDic.setObject(kSecClassGenericPassword, forKey: kSecClass as! NSCopying)
        keyChainDic.setObject(userIdKey, forKey: kSecAttrAccount as! NSCopying)
        var update = [AnyHashable: Any]()
        let security = [userIdKey: userId.AES128EncryptToBase64String(), tokenKey: token]
        let data = try! JSONSerialization.data(withJSONObject: security, options: [])

        update.updateValue(data, forKey: (kSecValueData as! NSCopying) as! AnyHashable)
        var status = SecItemUpdate(keyChainDic, update as CFDictionary)
        if status != errSecSuccess {
            keyChainDic.addEntries(from: update)
            status = SecItemAdd(keyChainDic, nil)
        }
    }

    func synchronize() {
        saveScurity()
        UserDefaults.Account.set(true, forKey: .isUserLoggedIn)
        UserDefaults.Account.set(userId.digestString(algorithm: .md5), forKey: .userId)
        UserDefaults.Account.set(userName, forKey: .username)
        UserDefaults.Account.set(token, forKey: .token)
        UserDefaults.Account.set(photoPath, forKey: .photoPath)
        UserDefaults.Account.set(name, forKey: .name)
        UserDefaults.Account.set(age, forKey: .age)
        UserDefaults.Account.set(country, forKey: .country)
        UserDefaults.Account.set(province, forKey: .province)
        UserDefaults.Account.set(city, forKey: .city)
        UserDefaults.Account.set(sex, forKey: .sex)
        loadFromLocal()
    }

    fileprivate override init() {
        super.init()
        loadFromLocal()
    }

    func clearUserInfo() {
        deleteSecurity()
        UserDefaults.Account.removeAll()
        SharedUserInfo.userId = ""
        loadFromLocal()

    }

    fileprivate func loadFromLocal() {
        userName   = UserDefaults.Account.string(forKey: .username)
        token      = UserDefaults.Account.string(forKey: .token)
        photoPath  = UserDefaults.Account.string(forKey: .photoPath)
        name       = UserDefaults.Account.string(forKey: .name)
        age        = UserDefaults.Account.int(forKey: .age)
        country    = UserDefaults.Account.string(forKey: .country)
        province   = UserDefaults.Account.string(forKey: .province)
        city       = UserDefaults.Account.string(forKey: .city)
        sex        = UserDefaults.Account.string(forKey: .sex)

        let keyChainDic = NSMutableDictionary()
        keyChainDic.setObject(kSecClassGenericPassword, forKey: kSecClass as! NSCopying)
        keyChainDic.setObject(userIdKey, forKey: kSecAttrAccount as! NSCopying)
        keyChainDic.setObject(kCFBooleanTrue, forKey: kSecReturnAttributes as! NSCopying)
        keyChainDic.setObject(kCFBooleanTrue, forKey: kSecReturnData as! NSCopying)
        var result: AnyObject?
        SecItemCopyMatching(keyChainDic, &result)
        if let resultDic = result as? NSDictionary {
            if let data = resultDic.object(forKey: kSecValueData as! NSCopying) as? Data {
                do {
                    let securityDic = try JSONSerialization.jsonObject(with: data, options: [.allowFragments])
                    guard let securityInfo = securityDic as? [String:String], let user_id = securityInfo[userIdKey] else {
                        return
                    }
                    self.userId = user_id.AES128DecryptFromBase64StringToString()
                    self.token = securityInfo[tokenKey] ?? ""
                } catch {
                    printLog("读取用户账号信息有误:\n\(error)")
                    SecItemDelete(keyChainDic)
                }
            }
        }

    }
}