LONDON-IOS/GMERemittance/Module/SendMoney/SendMoneyExchangeRate/User Interface/View/SendMoneyExchangeRateViewController.swift

//
//  SendMoneyExchangeRateViewController.swift
//  GMERemittance
//
//  Created by gme_2 on 28/08/2018.
//Copyright © 2018 Gobal Money Express Co. Ltd. All rights reserved.
//

import UIKit

class SendMoneyExchangeRateCurrencyViewModel{
    var countryCode: String?
    var currency: String?
}

class SendMoneyExchangeRateViewController: UIViewController {
    
    enum ActionBehaviour {
        case calculate
        case _continue
    }
    
    struct StringConstants {
      let youSendText = "you_send_text".localized()
      let reciepientGetsText = "recepient_gets_text".localized()
      let calculateText = "calculate_text".localized()
    }
    
    // MARK: IBOutlets
    
    @IBOutlet weak var exchangeBackground1: UIView!
    @IBOutlet weak var exchangeBackground2: UIView!
    @IBOutlet weak var dropDownImageView: UIImageView!
    @IBOutlet weak var backgroundViewCountryLabel1: UIView!
    @IBOutlet weak var backgroundViewCountryLabel2: UIView!
    @IBOutlet weak var countryListStackView: UIStackView!
    @IBOutlet weak var countryCodeLabel: UILabel!
    @IBOutlet weak var countryFlagImage: UIImageView!
    
    @IBOutlet weak var continueButton: UIButton!
    
    @IBOutlet weak var senderTextField: UITextField!
    @IBOutlet weak var reciepientTextField: UITextField!
    
    @IBOutlet weak var transferFeeInfoLabel: UILabel!
    @IBOutlet weak var exchangeRateLabel: UILabel!
    @IBOutlet weak var exchangeInfoStackView: UIStackView!
    
    @IBOutlet weak var youSendTitleLabel: UILabel!
    @IBOutlet weak var recipientGetsTitleLabel: UILabel!
    
    var countryListTapGuesture: UITapGestureRecognizer?
    
    var action: ActionBehaviour? {
        didSet {
            if let _action = action {
                switch _action {
                case .calculate:
                    self.continueButton.setTitle("calculate_text".localized(), for: .normal)
                case ._continue:
                    self.continueButton.setTitle("continue_text".localized(), for: .normal)
                }
            }
        }
    }
    
    var actionDelegate: SendMoneyExchangeRateActionDelegate?
    
    // MARK: Properties
    
    var presenter: SendMoneyExchangeRateModuleInterface?
    var currencyInfoViewModel: [SendMoneyExchangeRateCurrencyViewModel]? {
        didSet {
            self.selectedCurrencyViewModel =  self.currencyInfoViewModel?.first
        }
    }
    
    var reciepient: Recipient?
    
    var exchangeRateModel: SendMoneyExchangeRateModel? {
        didSet {
            self.reciepientTextField.text = Utility.getCommaSeperatedStringWithDecimal(numberString: self.exchangeRateModel?.recipientAmount ?? "")
            // todo
//            self.senderTextField.text = Utility.getCommaSeperatedString(numberString: self.exchangeRateModel?.senderAmount ?? "")
            self.senderTextField.text = Utility.getCommaSeperatedStringWithDecimal(numberString: self.exchangeRateModel?.senderAmount ?? "")
            let transferFee = self.exchangeRateModel?.transferFee ?? ""
            self.transferFeeInfoLabel.text = transferFee + "(" + "transfer_fee_included_text".localized() + ")"
            let exchangeRate = self.exchangeRateModel?.exchangeRate ?? ""
            self.exchangeRateLabel.text = exchangeRate + " (" + "current_exchange_rate_text".localized() + ")"
            
            UIView.animate(withDuration: 0.33) {
                self.transferFeeInfoLabel.isHidden = false
                self.exchangeRateLabel.isHidden = false
                self.exchangeInfoStackView.isHidden = false
                self.transferFeeInfoLabel.alpha = 1
                self.exchangeRateLabel.alpha = 1
                self.exchangeInfoStackView.alpha = 1
            }

            self.action = ._continue
        }
    }
    var requestModel: SendMoneyRequestModel?
    
    var calcBy = ""
    
    var currencies: [String]? {
        didSet {
//            self.setCurrencyLabel(currency: self.currencies?.first ?? "")
            let models: [SendMoneyExchangeRateCurrencyViewModel] =
                (self.currencies ?? []).map({
                    let viewmodel = SendMoneyExchangeRateCurrencyViewModel()
                    viewmodel.countryCode = self.reciepient?.countryCode ?? ""
                    viewmodel.currency = $0
                    return viewmodel
                })
            self.currencyInfoViewModel = models
        }
    }
    
    var selectedCurrencyViewModel: SendMoneyExchangeRateCurrencyViewModel? {
        didSet {
            self.setCurrencyLabel(currency: selectedCurrencyViewModel?.currency ?? "")
            self.action = .calculate
        }
    }
    
    var hudDelegate: HUDStatusDelegate?
    
    

    // MARK: VC's Life cycle
    
    override func viewDidLoad() {
        super.viewDidLoad()
        self.setup()
    }
    
    override func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(animated)
        configureViews()
        self.action = ActionBehaviour.calculate
    }
    
    // MARK: IBActions

    
    @IBAction func continueButton(_ sender: UIButton) {
        self.view.endEditing(true)
        if let _action = action {
            switch _action {
            case .calculate:
                self.calculate()
            case ._continue:
                // todo
                self.goToVerification()
            }
        }
    }
    
    func calculate() {
        let senderAmount = self.senderTextField.text!
        let reciepientAmount = self.reciepientTextField.text!
        self.calculateExchangeRate(senderAmount: senderAmount, reciepientAmount: reciepientAmount, calcBy: self.calcBy)
    }
    
    
    private func goToVerification() {
        self.exchangeRateModel?.calcBy = self.calcBy
        self.exchangeRateModel?.reciepientCurrency = self.selectedCurrencyViewModel?.currency ?? ""
        self.actionDelegate?.calculated(model: self.exchangeRateModel)
        self.actionDelegate?.continueToVerificationAction()
    }
   
    func calculateExchangeRate(senderAmount: String, reciepientAmount: String, calcBy: String) {
        let senderAmount = senderAmount // send sAmt amount
        let reciepientAmount =  reciepientAmount
        let recipientCurrency = self.selectedCurrencyViewModel?.currency
        let reciepientCountryId = self.reciepient?.countryId
        let paymentMethod = self.requestModel?.autoDebitAccount?.type ?? ""
        let paymentMethodId = self.requestModel?.paymemtMode?.id
        let payoutPartner = self.requestModel?.paymemtMode?.payoutPartner
        let myUsername = Utility.getMyUserName()
        let bankId = self.requestModel?.bank?.id //bank id if selected bank
        let reciepientCountryName = self.reciepient?.country
        self.calculate(senderAmt: senderAmount, recieverAmt: reciepientAmount, recieverCurrency: recipientCurrency, recieverCountryName: reciepientCountryName, recieverCountryId: reciepientCountryId, paymentMethod: paymentMethod, paymentMethodId: paymentMethodId, calcBy: calcBy, payoutPartner: payoutPartner, userId: myUsername, bankId: bankId)
    }
    
    
    // MARK: Other Functions
    private func setup() {
        // all setup should be done here
        self.setupTargets()
        self.action = .calculate
        self.senderTextField.delegate = self
        self.reciepientTextField.delegate = self
        calcBy = "c"
        // corner Radius
        [backgroundViewCountryLabel1, backgroundViewCountryLabel2].forEach({
            $0?.layer.cornerRadius = 5
        })
        
        [exchangeBackground1, exchangeBackground2].forEach({
            $0?.layer.borderWidth = 1
            $0?.layer.borderColor = UIColor.init(hex: "#E0E0E0").cgColor
            $0?.layer.cornerRadius = 5
        })
        configureLanguage()
    }
    
    private func configureLanguage() {
        self.youSendTitleLabel.text = StringConstants().youSendText
        self.recipientGetsTitleLabel.text = StringConstants().reciepientGetsText
        self.continueButton.setTitle(StringConstants().calculateText, for: .normal)
    }
    
    private func setCountryFlag(countryCode: String) {
        let flag = CountryInfo().getFlag(for: countryCode)
        self.countryFlagImage.image = flag
    }
    
    
    private func setCurrencyLabel(currency: String) {
        self.countryCodeLabel.text = currency.uppercased()
    }
    
    private func setupTargets() {
        let tapGuesture = UITapGestureRecognizer(target: self, action: #selector(self.showCountryList(_:)))
        self.countryListTapGuesture = tapGuesture
        self.countryListStackView.addGestureRecognizer(self.countryListTapGuesture!)
        
        self.reciepientTextField.addTarget(self, action: #selector(self.textChanged(sender:)), for: UIControlEvents.editingChanged)
        
        self.senderTextField.addTarget(self, action: #selector(self.textChanged(sender:)), for: UIControlEvents.editingChanged)
    }
    
    @objc func showCountryList(_ sender: UITapGestureRecognizer) {
        print("show Country List")
        let viewcontroller = UIStoryboard.init(name: "CurrencyPicker", bundle: nil).instantiateViewController(withIdentifier: "CurrencyPickerViewController") as! CurrencyPickerViewController
        viewcontroller.data = self.currencyInfoViewModel ?? []
        viewcontroller.type = PickerTitle.currency
        viewcontroller.doneAction = self.currencySelected
        self.present(viewcontroller, animated: true, completion: nil)
    }
    
    func currencySelected(models: [SendMoneyExchangeRateCurrencyViewModel?]) {
        if let model = models.first {
            self.selectedCurrencyViewModel = model
            calcBy.lowercased() == "c" ? (reciepientTextField.text = "") : (senderTextField.text = "")
        }
//        self.calculate()
    }
    
    private func configureViews() {
        self.exchangeRateModel = nil
        self.exchangeRateLabel.isHidden = true
        self.exchangeRateLabel.alpha = 0
        self.transferFeeInfoLabel.isHidden = true
        self.transferFeeInfoLabel.alpha = 0
        self.exchangeInfoStackView.isHidden = true
        exchangeInfoStackView.alpha = 0
        let dropDownImage = #imageLiteral(resourceName: "dropdown_white").withRenderingMode(UIImageRenderingMode.alwaysTemplate)
        let image = dropDownImage
        self.dropDownImageView.image = image
        self.dropDownImageView.tintColor = UIColor.white
        self.setCountryFlag(countryCode: self.reciepient?.countryCode ?? "")
        
        let deliveryMethod = self.requestModel?.paymemtMode
        if (deliveryMethod?.bankRequired ?? "false").lowercased() == "true" {
            self.currencies = self.requestModel?.bank?.payCurrency ?? []
            
        }else {
            self.currencies = deliveryMethod?.payCurrency ?? []
        }
    }
    
    func calculate(senderAmt: String?, senderCurrency: String? = "KRW", recieverAmt: String?, recieverCurrency: String?, recieverCountryName: String?, recieverCountryId: String?, paymentMethod: String?, paymentMethodId: String? ,calcBy: String?, senderCountryId: String? = "118", payoutPartner: String?, userId: String?, bankId: String?) {
        self.presenter?.calculate(senderAmt: senderAmt, senderCurrency: senderCurrency, recieverAmt: recieverAmt, recieverCurrency: recieverCurrency, recieverCountryName: recieverCountryName, recieverCountryId: recieverCountryId, paymentMethod: paymentMethod, paymentMethodId: paymentMethodId, calcBy: calcBy, senderCountryId: senderCountryId, payoutPartner: payoutPartner, userId: userId, bankId: bankId)
    }
        
    @objc private func textChanged(sender: UITextField) {
        self.action = .calculate
        switch sender {
        case senderTextField:
            self.reciepientTextField.text = ""
            self.calcBy = "c"
            senderTextField.text = Utility.getCommaSeperatedString(numberString: senderTextField.text!)
        case reciepientTextField:
            self.senderTextField.text = ""
            self.calcBy = "p"
            reciepientTextField.text = Utility.getCommaSeperatedString(numberString: reciepientTextField.text!)
        default:
            break
        }
    }
}

// MARK: SendMoneyExchangeRateViewInterface
extension SendMoneyExchangeRateViewController: SendMoneyExchangeRateViewInterface {

    func show(model: SendMoneyExchangeRateModel) {
        self.exchangeRateModel = model
    }
    
    func show(error: String) {
        self.alert(message: error)
    }
    
    func showLoading() {
        self.hudDelegate?.showLoading()
    }
    
    func hideLoading() {
        self.hudDelegate?.hideLoading()
    }
}

extension SendMoneyExchangeRateViewController {
    override func didMove(toParentViewController parent: UIViewController?) {
        self.viewWillAppear(true)
    }
}

extension SendMoneyExchangeRateViewController: UITextFieldDelegate {
    func textFieldDidEndEditing(_ textField: UITextField) {
//        self.calculate()
    }
}