LONDON-IOS/GMERemittance/Module/ExchangeRateViewControllerV2.swift

//
//  ExchangeRateViewController.swift
//  GMERemittance
//
//  Created by gme_2 on 20/08/2018.
//  Copyright © 2018 Gobal Money Express Co. Ltd. All rights reserved.
//

import UIKit
import Hex



//enum PaymentMode: String {
//    case cashDelivery = "1"
//    case bankDeposite = "2"
//    case homeDelivery = "12"
//    case mobileWallet = "13"
//}



class ExchangeRateViewControllerV2: UIViewController {
    
    struct Constants {
        static let transferFeeDetailText = "Transfer Fee Included"
        static let currentExchangeRateText = "Current Exchange Rate"
        static let paymentModeHeightConstant: CGFloat = 193
    }
    
    struct ApiConstants {
        static let recieverCountryId = "pCountry"
        static let senderCurrency = "sCurrency"
        static let recieverCurrency = "pCurrency"
        static let senderAmount = "cAmount"
        static let recieverAmount = "pAmount"
        static let paymentMethod =  "serviceType"
        static let calcBy = "calcBy"
        static let recieverCountryName = "pCountryName"
        static let senderCountryId = "sCountry"
    }
    
    @IBOutlet weak var collectionView: UICollectionView!
    @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 paymentModeStackViewConstraint: NSLayoutConstraint!
    @IBOutlet weak var paymentModeStackView: UIStackView!
    
    @IBOutlet weak var senderTextField: UITextField!
    @IBOutlet weak var reciepientTextField: UITextField!
    
    @IBOutlet weak var transferFeeInfoLabel: UILabel!
    @IBOutlet weak var exchangeRateInfoLabel: UILabel!
    
    
    var countryListTapGuesture: UITapGestureRecognizer?
    var selectedPaymentIndex: IndexPath = IndexPath.init(row: 0, section: 0)
    
    var nativeCountryCode: String? = "np"
    
    var calcBy = ""
    
    var exchangeRateModels: [ExchangeRateModel]? {
        didSet {
            
            
            if let _ = CountryInfo().defaultCountryCodes.filter({$0.lowercased() == (self.nativeCountryCode ?? "").lowercased()}).first  {
                if let defaultExchangeRate = self.exchangeRateModels?.filter({
                    ($0.countryCode ?? "").lowercased() == (self.nativeCountryCode ?? "").lowercased()
                }).first {
                    // there is native country, defaultExchangeRate is the information for that country
                    self.setCountryFlag(countryCode: defaultExchangeRate.countryCode ?? "")
                    self.setCurrencyLabel(currency: defaultExchangeRate.currency ?? "")
                    // set the default amount for this country. there are some default values in CountryInfo
                    self.selectedExchageRateModel = defaultExchangeRate
                    self.collectionView.reloadData()
                    showPaymentModeView()
                    self.populateDefaultAmounts()

                }
            } else {
                 self.setDefaultValuesForCountriesNotHavingDefaultValue()
                showPaymentModeView()
            }

            
        }
    }
    
    var selectedExchageRateModel: ExchangeRateModel? {
        didSet {
            self.setCurrencyLabel(currency: self.selectedExchageRateModel?.currency ?? "")
            self.setCountryFlag(countryCode: self.selectedExchageRateModel?.countryCode ?? "")
            self.reciepientTextField.text = ""
            calcBy = "c"
            collectionView.reloadData()
        }
    }
    

    // Life Cycle
    override func viewDidLoad() {
        super.viewDidLoad()
        setup()
        setupDelegates()
        setupTargets()
        setupNavigation()
        setupDefaultCountryFlagandCurrency()
        // todo: show default native country and falg
        // Do any additional setup after loading the view.
//        populateDefaultAmounts()
        fetchExchangeRateInformation()
    }
    
    func setupDefaultCountryFlagandCurrency() {
        if let defaultExchangeRate = self.exchangeRateModels?.filter({
            ($0.country ?? "").lowercased() == (self.nativeCountryCode ?? "").lowercased()
        }).first {
            // there is native country, defaultExchangeRate is the information for that country
            self.setCountryFlag(countryCode: defaultExchangeRate.countryCode ?? "")
            self.setCurrencyLabel(currency: defaultExchangeRate.currency ?? "")
        }
    }
    
    
    override func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(animated)
        self.title = "Today's Rate"
    }

    
    // IBActions
    
    @IBAction func calculateExchangeRate(_ sender: UIButton) {
        let senderAmount = self.senderTextField.text!
        let reciepientAmount = self.reciepientTextField.text!
        print("sender textfield \(senderAmount)")
        print("reciepientTextfield \(reciepientAmount)")
        print(calcBy)
        let recipientCurrency = self.selectedExchageRateModel?.currency
        let reciepientCountryId = self.selectedExchageRateModel?.countryId
        let paymentMethod = self.selectedExchageRateModel?.availableServices?.elementAt(index: selectedPaymentIndex.row)
        let reciepientCountryName = self.selectedExchageRateModel?.country
        self.calculate(senderAmt: senderAmount, recieverAmt: reciepientAmount, recieverCurrency: recipientCurrency, recieverCountryName: reciepientCountryName, recieverCountryId: reciepientCountryId, paymentMethod: paymentMethod?.id, calcBy: self.calcBy)
        // call calculate( ... ) function
        // todo send to api for calculation
        
    }
    
    func calculate(senderAmt: String?, senderCurrency: String? = "KRW", recieverAmt: String?, recieverCurrency: String?, recieverCountryName: String?, recieverCountryId: String?, paymentMethod: String?, calcBy: String?, senderCountryId: String? = "118", shouldShowLoading: Bool = true ) {
        
        let param: [String: String] =
            [
                ApiConstants.senderAmount : senderAmt ?? "",
                ApiConstants.senderCurrency : senderCurrency ?? "",
                ApiConstants.recieverAmount : recieverAmt ?? "",
                ApiConstants.recieverCurrency : recieverCurrency ?? "",
                ApiConstants.recieverCountryId : recieverCountryId ?? "",
                ApiConstants.paymentMethod: paymentMethod ?? "",
                ApiConstants.calcBy : calcBy ?? "",
                ApiConstants.senderCountryId : senderCountryId ?? "",
                ApiConstants.recieverCountryName: recieverCountryName ?? ""
        ]
        print(param)
        // todo
        
        if shouldShowLoading { self.showProgressHud() }
        self.getExchangeRateInformation(params: param, success: { (exchageRateDetail) in
            self.senderTextField.text = exchageRateDetail?.senderAmount
            self.reciepientTextField.text = exchageRateDetail?.recipientAmount
            
            let transferFee = exchageRateDetail?.transferFee ?? ""
            let currency = exchageRateDetail?.senderCurrency ?? ""
            
            self.transferFeeInfoLabel.text = "\(transferFee) \(currency) (\(Constants.transferFeeDetailText))"
            
            let exchangeRate = exchageRateDetail?.exchangeRate ?? ""
            self.exchangeRateInfoLabel.text = "\(exchangeRate) (\(Constants.currentExchangeRateText))"
            self.hideProgressHud()
        }) { (error) in
            self.hideProgressHud()
            self.alert(message: error.localizedDescription)
        }
        
        // call api with these params
    }
    
    
    @objc func showCountryList(_ sender: UITapGestureRecognizer) {
        print("show Country List")
        let viewcontroller = UIStoryboard.init(name: "TableViewPicker", bundle: nil).instantiateViewController(withIdentifier: "TablePickerViewController") as! TablePickerViewController
        viewcontroller.data = self.exchangeRateModels ?? []
        viewcontroller.type = TablePickerViewTitle.country
        viewcontroller.doneAction = self.countrySelected
//        viewcontroller.defaultSelectedData = [self.selectedExchageRateModel] 
        self.present(viewcontroller, animated: true, completion: nil)
    }
    
    
    // other function
    
    func showPaymentModeView() {
        UIView.animate(withDuration: 0.33) {
            self.paymentModeStackViewConstraint.constant = Constants.paymentModeHeightConstant
            self.paymentModeStackView.alpha = 1
            self.view.layoutIfNeeded()
        }
    }

    func countrySelected(model: [ExchangeRateModel]) {
        self.selectedExchageRateModel = model.first
        // show country with flag.
    }
    
    @objc private func textChanged(sender: UITextField) {
        switch sender {
        case senderTextField:
            self.reciepientTextField.text = ""
            self.calcBy = "c"
        case reciepientTextField:
            self.senderTextField.text = ""
            self.calcBy = "p"
        default:
            break
        }
    }
    
    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 populateDefaultAmounts() {
        guard let nativeCountry = self.nativeCountryCode else {return}
        // todo: native country cha bhane tesko CountryInfo class ma defaullt value cha ki chaina herne
        //  CountryInfo class ma defaullt value cha bhane tyo value rakhera second api hit garna paryo ani aako data dekhaune
        // natra bhane tesko 1000000 kwr ko native ma kati huncha teti populate garaune
        
        guard let exchangeModel = self.exchangeRateModels?.filter({
            $0.countryCode?.lowercased() == nativeCountry.lowercased()  // countryCode
        }).first else {return}
        
//        self.selectedExchageRateModel = exchangeModel
        
        
        // if there is no default amount, then we have to calculate from korean won. so guard ma rakhna thik nahola, yo case hereko chaina

        if let recievingAmount =  CountryInfo().getDefaultSendingAmount(for: exchangeModel.countryCode ?? "") {
            self.setDefaultValuesForCountriesHavingDefaultValue(recievingAmount: recievingAmount, exchangeModel: exchangeModel)
        }
//        else {
//            setDefaultValuesForCountriesNotHavingDefaultValue()
//        }
        
    }
    
    private func setDefaultValuesForCountriesNotHavingDefaultValue() {
        self.selectedExchageRateModel = self.exchangeRateModels?.first
        let senderAmount = CountryInfo().getDefaultSendingMoneyInKoreanWon()
        self.senderTextField.text = senderAmount
        let senderCurrency = "KWR"
        let recieverCurrency = self.selectedExchageRateModel?.currency
        let recieverCountryId = self.selectedExchageRateModel?.countryId
        let paymentMethod = self.selectedExchageRateModel?.availableServices?.elementAt(index: selectedPaymentIndex.row)
        let reciepientCountryName = self.selectedExchageRateModel?.country ?? ""
        let calcBy = "c"
        let senderCountryName = "KOREA"
        
        self.calculate(senderAmt: senderAmount, senderCurrency: senderCurrency, recieverAmt: nil, recieverCurrency: recieverCurrency, recieverCountryName: reciepientCountryName, recieverCountryId: recieverCountryId, paymentMethod: paymentMethod?.id, calcBy: calcBy, shouldShowLoading: false)
    }
    
    private func setDefaultValuesForCountriesHavingDefaultValue(recievingAmount: String, exchangeModel: ExchangeRateModel) {
        guard let recievingCurrency = CountryInfo().getDefaultSendingCurrency(for: exchangeModel.countryCode ?? ""),
            let recievingCountryId = exchangeModel.countryId,
            let paymentMethod = exchangeModel.availableServices?.elementAt(index: selectedPaymentIndex.row)
            else {
                // do something if you have to do
                return
        }
        self.calcBy = "p"
        self.reciepientTextField.text = recievingAmount
        let reciepientCountryName = exchangeModel.country
        self.calculate(senderAmt: nil, senderCurrency: "KRW", recieverAmt: recievingAmount, recieverCurrency: recievingCurrency, recieverCountryName: reciepientCountryName, recieverCountryId: recievingCountryId, paymentMethod: paymentMethod.id, calcBy: calcBy, shouldShowLoading: false)
    }

    
    private func fetchExchangeRateInformation() {
        self.showProgressHud()
        self.fetchCountryCurrencyInfo(success: { (models) in
            self.exchangeRateModels = models
        }) { (error) in
            self.hideProgressHud()
            self.alert(message: error.localizedDescription)
        }
    }
    
    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)
        
    }
    
    private func setupDelegates() {
        self.collectionView.delegate = self
        self.collectionView.dataSource = self
    }
    
    private func setup() {
        let dropDownImage = #imageLiteral(resourceName: "dropdown_white").withRenderingMode(UIImageRenderingMode.alwaysTemplate)
        let image = dropDownImage
        self.dropDownImageView.image = image
        self.dropDownImageView.tintColor = UIColor.white
        self.paymentModeStackViewConstraint.constant = 0
        self.paymentModeStackView.alpha = 0
        
        // 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
        })
    }
    
    
    
    private func setupNavigation() {
        var backBtnImage = #imageLiteral(resourceName: "backIconBlack")
        backBtnImage = backBtnImage.withRenderingMode(UIImageRenderingMode.alwaysOriginal)
        self.navigationController!.navigationBar.backIndicatorImage = backBtnImage
        self.navigationController!.navigationBar.backIndicatorTransitionMaskImage = backBtnImage
        self.navigationController?.navigationBar.barTintColor = UIColor.white
    }
}


extension ExchangeRateViewControllerV2: UICollectionViewDelegate {
    
    func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
        
        let cell = collectionView.cellForItem(at: indexPath) as! ExchangeRateCollectionViewCell
        self.selectedPaymentIndex = indexPath
        self.collectionView.reloadData()
    }
}

extension ExchangeRateViewControllerV2: UICollectionViewDataSource {
    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        return self.selectedExchageRateModel?.availableServices?.count ?? 0
    }
    
    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
        let service = self.selectedExchageRateModel?.availableServices?.elementAt(index: indexPath.row)
        guard let index = PaymentMode.init(rawValue: service?.id ?? "") else {
            return UICollectionViewCell()
            
        }
        switch index {
        case .bankDeposite:
            return configureBankDepositeCell(collectionView: collectionView, indexPath: indexPath)
        case .cashDelivery:
            return configureCashDeliveryCell(collectionView: collectionView, indexPath: indexPath)
        case .homeDelivery:
            return configureHomeDeliveryCell(collectionView: collectionView, indexPath: indexPath)
            
        case .mobileWallet:
            return configureWalletDeliveryCell(collectionView: collectionView, indexPath: indexPath)
        }
    }
    
    func configureBankDepositeCell(collectionView: UICollectionView, indexPath: IndexPath) -> UICollectionViewCell {
        let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "ExchangeRateCollectionViewCell", for: indexPath) as! ExchangeRateCollectionViewCell
        cell.cellSelected = self.selectedPaymentIndex == indexPath
        cell.paymentServiceMethod = self.selectedExchageRateModel?.availableServices?.elementAt(index: indexPath.row)
        cell.image = #imageLiteral(resourceName: "ic_bank")
        cell.setup()
        return cell
    }
    
    func configureWalletDeliveryCell(collectionView: UICollectionView, indexPath: IndexPath) -> UICollectionViewCell {
    let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "ExchangeRateCollectionViewCell", for: indexPath) as! ExchangeRateCollectionViewCell
    cell.cellSelected = self.selectedPaymentIndex == indexPath
    cell.paymentServiceMethod = self.selectedExchageRateModel?.availableServices?.elementAt(index: indexPath.row)
    cell.image = #imageLiteral(resourceName: "wallet-transfer")
    cell.setup()
    return cell
    }
    
    func configureCashDeliveryCell(collectionView: UICollectionView, indexPath: IndexPath) -> UICollectionViewCell {
        let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "ExchangeRateCollectionViewCell", for: indexPath) as! ExchangeRateCollectionViewCell
        cell.cellSelected = self.selectedPaymentIndex == indexPath
        cell.paymentServiceMethod = self.selectedExchageRateModel?.availableServices?.elementAt(index: indexPath.row)
        cell.image = #imageLiteral(resourceName: "ic_cash")
        cell.setup()
        return cell
    }
    
    func configureHomeDeliveryCell(collectionView: UICollectionView, indexPath: IndexPath) -> UICollectionViewCell {
        let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "ExchangeRateCollectionViewCell", for: indexPath) as! ExchangeRateCollectionViewCell
        cell.cellSelected = self.selectedPaymentIndex == indexPath
        cell.paymentServiceMethod = self.selectedExchageRateModel?.availableServices?.elementAt(index: indexPath.row)
        cell.image = #imageLiteral(resourceName: "ic_homeDelivery")
        cell.setup()
        return cell
    }
}

extension ExchangeRateViewControllerV2: FetchCountryCurrencyInformation, getExchangeRateInformation {}



















extension ExchangeRateViewControllerV2 {
    func createTestModel() {
        let service1 = PaymentServiceType()
        service1.id = "1"
        service1.type = "cash"
        service1.subtitle = "1 business day"
        
        let service2 = PaymentServiceType()
        service2.id = "2"
        service2.type = "bank"
        service2.subtitle = "2 hour"
        
        let service3 = PaymentServiceType()
        service3.id = "3"
        service3.type = "home"
        service3.subtitle = "5 business day"
        
        let model = ExchangeRateModel()
        model.country = "Nepal"
        model.countryCode = "Np"
        model.countryId = "1"
        model.currency = "NRS"
        model.availableServices = [service2, service1]
        
        let model1 = ExchangeRateModel()
        model1.country = "Korea"
        model1.countryCode = "krw"
        model1.countryId = "2"
        model1.currency = "KRW"
        model1.availableServices = [service2, service1, service3]
        
        let model2 = ExchangeRateModel()
        model2.country = "India"
        model2.countryCode = "in"
        model2.currency = "INR"
        model2.countryId = "3"
        model2.availableServices = [service2]
        
        let model3 = ExchangeRateModel()
        model3.country = "China"
        model3.countryCode = "cn"
        model3.currency = "CN"
        model3.countryId = "4"
        model3.availableServices = [service2, service1, service3]
        
        let model4 = ExchangeRateModel()
        model4.country = "Cambodia"
        model4.countryCode = "Kh"
        model4.currency = "USD"
        model4.countryId = "5"
        model4.availableServices = [service2, service1, service3]
        
        let model5 = ExchangeRateModel()
        model5.country = "Vietnam"
        model5.countryCode = "Vn"
        model5.currency = "VND"
        model5.countryId = "6"
        model5.availableServices = [service2, service1, service3]
        
        
    }
}