//
//  SignUpViewModel.swift
//  GMERemittance
//
//  Created by Sujal on 12/8/17.
//  Copyright © 2017 Gobal Money Express Co. Ltd. All rights reserved.
//

import Foundation
import SwiftyJSON

class SignUpViewModel: ModelExtension {
    
    private let minPasswordLength: Int = 1
    
    var registered: Box<Bool?> = Box(nil)
    
    var signUpConnectionTimeOut: Box<Bool?> = Box(nil)
    
    var username: String!
    var password: String!
    var confirmpassword: String!
    
}

extension SignUpViewModel {
    
    func setUserCredentials(username: String, password: String, confirmpassword: String) {
        self.username = username
        self.password = password
        self.confirmpassword = confirmpassword
    }
    
    /**
        Validate empty textfield
     */
    func validateUser() -> isValid {
        if (username.isBlank || password.isBlank || confirmpassword.isBlank) {
            return .InValid("Please fill all the fields")
        } else {
            if isNumber(username: username) {
                if isValidPhone(phone: username) {
                    if isValidPasswordLength(password: password) {
                        if passwordsMatch(password: password, confirmpassword: confirmpassword) {
                            return .Valid
                        }
                        return .InValid("Passwords do not match")
                    }
                    return .InValid("Password length doesn't meet criteria")
                }
                return .InValid("InValid Phone")
            } else {
                if isValidEmail(email: username) {
                    if isValidPasswordLength(password: password) {
                        if passwordsMatch(password: password, confirmpassword: confirmpassword) {
                            return .Valid
                        }
                        return .InValid("Passwords do not match")
                    }
                    return .InValid("Password length doesn't meet criteria")
                }
                return .InValid("InValid Email")
            }
        }
    }
    
    /**
     Validate email format
     */
    func isValidEmail(email:String) -> Bool {
        let emailRegEx = "[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,6}"
        return NSPredicate(format:"SELF MATCHES %@", emailRegEx).evaluate(with: email)
    }
    
    /**
     Validate phone number
     */
    func isValidPhone(phone: String) -> Bool {
        return true
    }
    
    /**
     Validate empty textfield
     */
    func isBlank(text: String) -> Bool {
        return text.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty
    }
    
    /**
     Validate password length
     */
    func isValidPasswordLength(password: String) -> Bool {
        guard password.count < minPasswordLength else {
            return true
        }
        return false
    }
    
    /**
     Validate password match
     */
    func passwordsMatch(password: String, confirmpassword: String) -> Bool {
        guard password == confirmpassword else {
            return false
        }
        return true
    }
    
    /**
     Validate phone number
     */
    func isNumber(username: String) -> Bool {
        guard let _ = Int(username) else {
            return false
        }
        return true
    }
}

extension SignUpViewModel {
    /**
        Api request for register the account
     */
    func register() {
        if !Reachability.isConnectedToNetwork() {
            self.internetConnection.value = false
        } else {
            RestApiMananger.sharedInstance.registerUser(userId: self.username, password: self.password) { result in
                switch result {
                case let .success(json):
                    print(json, "code")
                    UserDefaults.standard.set(self.username, forKey: "com.gmeremit.username")
                    self.registered.value = true
                case let .failure(errorJSON):
                    self.setErrorMessage(message: errorJSON["message"].stringValue)
                    self.registered.value = false
                case .updateAccessCode:
                    return
                case .logOutUser():
                    return
                case .timeOut:
                    self.signUpConnectionTimeOut.value = false
                }
            }
        }
    }
}