//
//  ProfileChangePasswordViewController.swift
//  GMERemittance
//
//  Created by Fm-user on 1/9/18.
//  Copyright © 2018 Gobal Money Express Co. Ltd. All rights reserved.
//

import UIKit


// there is not time to take this to viper archi. so applying mvc here.





class ProfileChangePasswordViewController: UIViewController {
    
    @IBOutlet weak var textFieldCurrentPassword: UITextField!
    @IBOutlet weak var textFieldNewPassword: UITextField!
    @IBOutlet weak var textFieldConfirmPassword: UITextField!
    @IBOutlet weak var topLabel: UILabel!
    @IBOutlet weak var contentView: UIView!

    
    override func viewDidLoad() {
        super.viewDidLoad()
        self.setupNormalNavigation()
        topLabel.font = UIFont.init(name: Fonts.Family.regular, size: 14)
        topLabel.textColor = UIColor.init(hex: "4a4a4a")
        
    }
    
    override func viewWillAppear(_ animated: Bool) {
        super.viewWillDisappear(animated)
        self.navigationItem.title = "Change Password"
    }
    
    override func viewWillDisappear(_ animated: Bool) {
        super.viewWillDisappear(animated)
        self.navigationItem.title = ""
    }
    
    @IBAction func savePasswordChanges(_ sender: Any) {
        let currentPassword = self.textFieldCurrentPassword.text!
        let newPassword = self.textFieldNewPassword.text!
        let confirmPassword = self.textFieldConfirmPassword.text!
        
        let result = self.isValid(currentPassword: currentPassword, password: newPassword, confirmPassword: confirmPassword)
        if result.isValid {
            let userId = Utility.getMyUserName()
            let param =
                [
                    "UserId" : userId,
                    "OldPassword": currentPassword,
                    "NewPassword": newPassword
            ]
            self.updatePassword(param: param)
        }else {
            let message = result.error
            self.alert(message: message.localizedDescription)
        }
    }
    
    func updatePassword(param: [String: String])  {
        self.updatePassword(params: param, success: { (message) in
            self.alert(message: message, title: "Success", okAction: {
                self.navigationController?.popViewController(animated: true)
            })
        }) { (error) in
            self.alert(message: error.localizedDescription)
        }
    }

}

extension ProfileChangePasswordViewController {
    private func isValidPasword(password: String, confirmPassword: String) -> (isValid: Bool, error: String) {
        var error = ""
        var isValid = true
        
        // >= 9, 1 special character, 1 number
        
        func isValidLength() -> Bool {
            return password.count >= 9
        }
        
        func hasNumber() -> Bool {
            let characterSet =  CharacterSet.init(charactersIn: "1234567890")
            return password.rangeOfCharacter(from: characterSet) != nil
        }
        
        func hasLetter() -> Bool {
            let characterSet =  CharacterSet.letters
            return password.rangeOfCharacter(from: characterSet) != nil
        }
        
        func hasSpecialCharacter() -> Bool {
            let characterSet = CharacterSet.alphanumerics
            return password.rangeOfCharacter(from: characterSet.inverted) != nil
        }
        
        
        func hasUpperCase() -> Bool {
            let characterSet = CharacterSet.uppercaseLetters
            return password.rangeOfCharacter(from: characterSet) != nil
        }
        
        
        
        if password.isEmpty {
            error = error + "\n Password cannot be empty"
            isValid = false
        }else {
            
            if !isValidLength() {
                error = error + "\n Password should have at least 9 characters"
                isValid = false
                return (isValid, error)
            }
            
            let validPassword = hasNumber() && hasLetter() && hasSpecialCharacter() && hasUpperCase()
            
            if !validPassword {
                isValid = false
                error = error + "\n Password should contain at least one symbol, one capital letter and one number"
                return (isValid, error)
            }
            
            if password != confirmPassword {
                error = error + "\n Passwords does not match."
                isValid = false
            }
        }
        
        return (isValid, error)
    }
    // MARK: Converting entities
    
    private func isValid(currentPassword: String, password: String, confirmPassword: String) -> (isValid: Bool, error: Error) {
        var error = ""
        var isValid = true
        // user name
        
        if currentPassword.isEmpty {
            error = error + "current password field is required.";
            isValid = false
        }
        
        let result = self.isValidPasword(password: password, confirmPassword: confirmPassword)
        
        if !result.isValid {
            error = error + result.error
            isValid = false
        }

        
        let _error = NSError.init(domain: "LoginInteractor", code: 0, userInfo: [NSLocalizedDescriptionKey : error])
        return (isValid, _error)
    }
    
}

extension ProfileChangePasswordViewController: UpdatePasswordService {
    
}



protocol UpdatePasswordService: ApiServiceType {
    func updatePassword(params: [String: String], success: @escaping (String?) -> (), failure: @escaping (Error) -> ())
}

extension UpdatePasswordService {
    func updatePassword(params: [String: String], success: @escaping (String?) -> (), failure: @escaping (Error) -> ()) {
        let url = baseUrl + "mobile/ChangePassword"
        auth.request(method: .post, url: url, params: params, needsAuthorization: false,  success: { (response: SuccessMessageContainer) in
            if (response.errorCode ?? "") == "1" {
                let error = NSError.init(domain: "Network", code: 0, userInfo: [NSLocalizedDescriptionKey : response.message ?? ""])
                failure(error)
            }else {
                success(response.data?.message)
            }
        }) { (error) in
            failure(error)
        }
    }
}