//
//  KycForm2ViewController.swift
//  GMERemittance
//
//  Created by gme_2 on 12/09/2018.
//Copyright © 2018 Gobal Money Express Co. Ltd. All rights reserved.
//

import UIKit
import XLPagerTabStrip


class KycForm2Model {
    var bank = ""
    var accountNumber = ""
    var verificationId = ""
    var verificationIdNumber = ""
    var expiryDate = ""
    var sourceOfFund = ""
     var issueDate = ""
    var checkIssueDate = false
    var checkExpiryDate = false
}

struct KycForm2FieldKeys {
    static let bank = "bank"
    static let accountNumber = "account number"
    static let verificationId = "verification id"
    static let verificationIdNumber = "verification id number"
    static let expiryDate = "expiry date"
    static let sourceOfFund = "source of fund"
    static let issueDate = "issue date"
    static let shouldValidateIssueDate = "issue date validation"
    static let shouldValidateExpiryDate = "expiry date validation"
}

enum KycVerificationIdType: String {
    case alieanCard = "Alien Registration Card"
    case nationalIdCard = "National ID"
    case passport = "Passport"
}


class KycForm2ViewController: UIViewController {
    
    

    struct Constants {
        static let stateRedColor = UIColor.init(hex: "#EC1C24")
        static let clearColor = UIColor.clear
        static let issueDateText =  "docIssueDate"
        static let expiryDateText = "docExpiryDate"
        static let issueDateTag = 30001
        static let expiryDateTag = 30002
        static let errorFont = Fonts.Error.font
        static let errorBorderSize = AppConstants.errorBorderWidth
    }
    
    // MARK: IBOutlets
    
    // labels
    
    @IBOutlet weak var bankErrorLabel: UILabel!
    @IBOutlet weak var accountNumberErrorLabel: UILabel!
    @IBOutlet weak var verificationIdErrorLabel: UILabel!
    @IBOutlet weak var verificationIdNumberErrorLabel: UILabel!
    @IBOutlet weak var expiryDateErrorLabel: UILabel!
    @IBOutlet weak var sourceOfFundErrorLabel: UILabel!
    @IBOutlet weak var issueDateErrorLabel: UILabel!
    
    
    // textfields
    
    @IBOutlet weak var bankTextField: UITextField!
    @IBOutlet weak var accountNumberTextField: UITextField!
    @IBOutlet weak var verificationIdTextField: UITextField!
    @IBOutlet weak var verificationIdNumberTextField: UITextField!
    @IBOutlet weak var expiryDateTextField: UITextField!
    @IBOutlet weak var sourceOfFundTextField: UITextField!
    @IBOutlet weak var issueDateTextField: UITextField!
    
    
    // stackViews
     @IBOutlet weak var expiryDateStackView: UIStackView!
    @IBOutlet weak var issueDateStackView: UIStackView!
    
    // MARK: Properties
    
    var errorLabels: [UILabel] = []
    var textfields: [UITextField] = []
    
    var errorTextFieldDict: [String: UITextField] = [:]
    var errorLabelsDict: [String: UILabel] = [:]
    
    
    var hiddenFieldsDict: [String: UIStackView]?
    var hiddenFields: [UIStackView]?
    
    var kycModel: KycModel? {
        didSet {
            self.banks = kycModel?.bank
            self.verificationIdTypes = kycModel?.idType
            self.sourceOfFunds = kycModel?.sourceOfFund
        }
    }
    
    var verificationIdSelectedCardType: KycVerificationIdType = .passport {
        didSet {
            switch verificationIdSelectedCardType {
            case .alieanCard, .nationalIdCard:
                self.verificationIdNumberTextField.keyboardType = .numberPad
                self.verificationIdNumberTextField.addTarget(self, action: #selector(self.verificationIdTextChanged(sender:)
                    ), for: UIControlEvents.editingChanged)
                break
            case .passport:
                self.verificationIdNumberTextField.keyboardType = .default
                self.verificationIdNumberTextField.removeTarget(self, action: #selector(self.verificationIdTextChanged(sender:)
                    ), for: UIControlEvents.editingChanged)
                break
            }
        }
    }
    
    var banks: [KeyValueModel]?
    
    var verificationIdTypes: [VerificationIdType]? {
        didSet {
            
        }
    }
    var sourceOfFunds:[KeyValueModel]?
    
    
    var selectedBank: KeyValueModel? {
        didSet {
            self.bankTextField.text = selectedBank?.text
            self.kycForm2Model.bank = selectedBank?.id ?? ""
        }
    }
    
    var selectedVerificationIdType: VerificationIdType? {
        didSet {
            self.verificationIdTextField.text = self.selectedVerificationIdType?.text
            self.kycForm2Model.verificationId = self.selectedVerificationIdType?.id ?? ""

            var _views: [UIStackView] = []
            _views = (self.selectedVerificationIdType?.dependent ?? []).compactMap({
                print($0)
                return self.hiddenFieldsDict?[$0]
            })
            self.hiddenFields?.forEach({
                if _views.contains($0) {
                    self.kycForm2Model.checkIssueDate = $0.tag == Constants.issueDateTag
                    self.kycForm2Model.checkExpiryDate = $0.tag == Constants.expiryDateTag
                  $0.isHidden = false
                }else {
                  $0.isHidden = true
                }
                
            })
            
            if selectedVerificationIdType?.text != oldValue?.text {
                self.verificationIdNumberTextField.text = ""
            }
            
            if let type = KycVerificationIdType.init(rawValue: selectedVerificationIdType?.text ?? "") {
                 self.verificationIdSelectedCardType = type
            }

        }
    }
    
    var selectedSourceOfFund : KeyValueModel? {
        didSet {
            self.sourceOfFundTextField.text = selectedSourceOfFund?.text
            self.kycForm2Model.sourceOfFund = selectedSourceOfFund?.id ?? ""
        }
    }
    
    
    var delegate: KYCForm2Delegate?
    var presenter: KycForm2ModuleInterface?
    
    var continueActionInitiated = false
    var kycForm2Model: KycForm2Model =  KycForm2Model()
    let expiaryDatePicker = UIDatePicker()
    let issueDatePicker = UIDatePicker()
    
    // MARK: VC's Life cycle
    
    override func viewDidLoad() {
        super.viewDidLoad()
        self.setup()
    }
    
    
    override func viewWillDisappear(_ animated: Bool) {
        super.viewWillDisappear(animated)
        continueActionInitiated = false
        validate()
        
    }
    // MARK: IBActions
    
    @IBAction func _continue(_ sender: UIButton) {
        continueActionInitiated = true
        self.delegate?._continue(model: self.kycForm2Model)
    }
    // MARK: Other Functions
    
    private func createModel() {
        self.kycForm2Model.accountNumber = self.accountNumberTextField.text!
        self.kycForm2Model.verificationIdNumber = self.verificationIdNumberTextField.text!
        self.kycForm2Model.expiryDate = self.expiryDateTextField.text!
        self.kycForm2Model.issueDate = self.issueDateTextField.text!
    }
    
    private func setup() {
        // all setup should be done here
       hideErrorLabels()
        setupErrorLabels()
        setupErrorTextFields()
        setupDatePicker()
        setupDelegates()
        setupHiddenFields()
    }
    
    private func setupHiddenFields() {
        self.hiddenFields = [issueDateStackView, expiryDateStackView]
        issueDateStackView.tag = Constants.issueDateTag
        expiryDateStackView.tag = Constants.expiryDateTag
        self.hiddenFieldsDict = [
            Constants.issueDateText : issueDateStackView,
            Constants.expiryDateText: expiryDateStackView
        ]
        self.hiddenFieldsDict?.forEach({
            $0.value.isHidden = true
        })
    }
    
    private func validate() {
        createModel()
        self.delegate?.addModel(model: self.kycForm2Model)
        
    }
    
    @objc private func verificationIdTextChanged(sender: UITextField) {

    }
    
    private func setupDelegates() {
        self.bankTextField.delegate = self
        self.accountNumberTextField.delegate = self
        self.verificationIdTextField.delegate = self
        self.verificationIdNumberTextField.delegate = self
        self.expiryDateTextField.delegate = self
        self.issueDateTextField.delegate = self
        self.sourceOfFundTextField.delegate = self
    }
    
    private func setupDatePicker() {
        self.expiaryDatePicker.datePickerMode = .date
        self.expiryDateTextField.inputView = expiaryDatePicker
        self.expiaryDatePicker.addTarget(self, action: #selector(handleExpiryDatePicker), for: .valueChanged)
        
        self.issueDatePicker.datePickerMode = .date
        self.issueDateTextField.inputView = issueDatePicker
        issueDatePicker.maximumDate = Date()
        self.issueDatePicker.addTarget(self, action: #selector(handleIssueDatePicker), for: .valueChanged)
        
        
    }
    
    @objc private func handleIssueDatePicker(sender: UIDatePicker) {
        let dateFormatter = DateFormatter()
        let date = sender.date
        expiaryDatePicker.minimumDate = date
        dateFormatter.dateFormat = AppConstants.dateFormat
//        test ccr
        self.issueDateTextField.text = dateFormatter.string(from: sender.date)
    }
    
    
    @objc private func handleExpiryDatePicker(sender: UIDatePicker) {
        let dateFormatter = DateFormatter()
        // test ccr
        dateFormatter.dateFormat = AppConstants.dateFormat
        self.expiryDateTextField.text = dateFormatter.string(from: sender.date)
    }
    
    
    private func hideErrorLabels() {
        [bankErrorLabel, accountNumberErrorLabel, verificationIdErrorLabel, verificationIdNumberErrorLabel, expiryDateErrorLabel, issueDateErrorLabel, sourceOfFundErrorLabel].forEach({
            $0?.isHidden = true
        })
    }
    
    private func setupErrorLabels() {
        self.errorLabels = [bankErrorLabel, accountNumberErrorLabel, verificationIdErrorLabel, verificationIdNumberErrorLabel, expiryDateErrorLabel,issueDateErrorLabel, sourceOfFundErrorLabel]
        
        self.errorLabels.forEach({
            $0.font = Constants.errorFont
        })
        
        self.errorLabelsDict =
            [
                KycForm2FieldKeys.bank: self.bankErrorLabel,
                KycForm2FieldKeys.accountNumber: self.accountNumberErrorLabel,
                KycForm2FieldKeys.verificationId: self.verificationIdErrorLabel,
                KycForm2FieldKeys.verificationIdNumber: self.verificationIdNumberErrorLabel,
                KycForm2FieldKeys.expiryDate: self.expiryDateErrorLabel,
                KycForm2FieldKeys.sourceOfFund: self.sourceOfFundErrorLabel,
                KycForm2FieldKeys.issueDate: self.issueDateErrorLabel
        ]
    }
    
    private func setupErrorTextFields() {
        
        self.textfields = [bankTextField, accountNumberTextField, verificationIdTextField, verificationIdNumberTextField, expiryDateTextField, sourceOfFundTextField]
        bankTextField.tag = 12
        accountNumberTextField.tag = 13
        verificationIdNumberTextField.tag = 14
        expiryDateTextField.tag = 15
        issueDateTextField.tag = 16
        sourceOfFundTextField.tag = 17
        
        
        
        self.errorTextFieldDict =
            [
                KycForm2FieldKeys.bank: self.bankTextField,
                KycForm2FieldKeys.accountNumber: self.accountNumberTextField,
                KycForm2FieldKeys.verificationId: self.verificationIdTextField,
                KycForm2FieldKeys.verificationIdNumber: self.verificationIdNumberTextField,
                KycForm2FieldKeys.expiryDate: self.expiryDateTextField,
                KycForm2FieldKeys.sourceOfFund: self.sourceOfFundTextField
        ]
    }
    
    private func showBorder(textfield :UITextField?) {
        guard let textfield = textfield else {return}
        textfield.layer.borderColor = Constants.stateRedColor.cgColor
        textfield.layer.borderWidth = Constants.errorBorderSize
        textfield.layer.addShadow(with: Constants.stateRedColor)
    }
    
    private func show( error: String, label: UILabel?) {
        // scroll to the top of the view
        guard let label = label else {return}
        label.textColor = Constants.stateRedColor
        label.isHidden = false
        label.text = error
    }
}

// MARK: KycForm2ViewInterface
extension KycForm2ViewController: KycForm2ViewInterface {
    func show(resut2: (isValid: Bool, errorsDick: [String : String])) {
        var position = 15
    
        if resut2.isValid { // if isValid
            // its is not valid, lets go to security page
            if self.continueActionInitiated {
                self.delegate?._continue(model: self.kycForm2Model)
            }
        }else {
            resut2.errorsDick.forEach({
                let label = errorLabelsDict[$0.key]
                self.show(error: $0.value, label: label)
                let textfield = errorTextFieldDict[$0.key]
                self.showBorder(textfield: textfield)
                let tag = (textfield?.tag ?? position)
                position = tag < position ? tag : position
                if let topMostTextField = self.textfields.filter({
                    $0.tag == tag
                }).first {
                    // Todo
                    // scroll to view here
                }
            })
        }
    }
    
    
    func show(error: String) {
        self.alert(message: error)
    }
    
    func showLoading() {
        self.showProgressHud()
    }
    
    func hideLoading() {
        self.hideProgressHud()
    }
    
}

extension KycForm2ViewController: IndicatorInfoProvider {
    func indicatorInfo(for pagerTabStripController: PagerTabStripViewController) -> IndicatorInfo {
        return IndicatorInfo.init(title: "Security")
    }
}

extension KycForm2ViewController: UITextFieldDelegate {
    func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
        if textField == verificationIdNumberTextField && self.verificationIdSelectedCardType != .passport {
            let text = textField.text!
            if (range.length > 0)
            {
                // We're deleting

                if text.count < 7 {
                    let newText = text.replacingOccurrences(of: "-", with: "")
                    textField.text = newText
                }
            }
            else
            {
                var _text = text.replacingOccurrences(of: "-", with: "")
                if _text.count >= 6 {
                    _text.insert("-", at: String.Index.init(encodedOffset: 6))
                    textField.text = _text
                }
                // We're adding
                
            }
        }
        
        return true
    }
    
    func textFieldShouldBeginEditing(_ textField: UITextField) -> Bool {
        textField.layer.addShadow(with: Constants.clearColor)
        textField.layer.borderWidth = 0
        switch textField {
        case bankTextField:
            // show bank picker
            showBankPickerView()
            self.bankErrorLabel.isHidden = true
            return false
        case verificationIdTextField:
            self.verificationIdErrorLabel.isHidden = true
            showVerificationIdTypePicker()
            // show list of verificationId type
            return false
        case sourceOfFundTextField:
            // show source of fund picker
            self.sourceOfFundErrorLabel.isHidden = true
            self.showSourceOfFundPicker()
            return false
        default:
            return true
        }
    }
    
    func textFieldDidBeginEditing(_ textField: UITextField) {
         textField.layer.addShadow(with: Constants.clearColor)
        textField.layer.borderWidth = 0
        switch textField {
        case accountNumberTextField:
            accountNumberErrorLabel.isHidden = true
        case verificationIdNumberTextField:
            verificationIdNumberErrorLabel.isHidden = true
        case expiryDateTextField:
            expiryDateErrorLabel.isHidden = true
        case issueDateTextField:
            issueDateErrorLabel.isHidden = true
        default:
            break
        }
    }
}


extension KycForm2ViewController {
    private func showBankPickerView() {
        let viewcontroller = self.getPickerViewController()
        let banks = self.banks ?? []
        let names = banks.compactMap({$0.text})
        viewcontroller.data = names
        viewcontroller.type = PickerTitle.bank
        viewcontroller.doneAction = self.bankSelected
        self.present(viewcontroller, animated: true, completion: nil)
    }
    
    private func getPickerViewController()-> ItemsPickerViewController  {
        return UIStoryboard.init(name: "ItemsPicker", bundle: nil).instantiateViewController(withIdentifier: "ItemsPickerViewController") as! ItemsPickerViewController
    }
    
    func bankSelected(banks: [String]) {
        let _bank = self.banks?.filter({($0.text ?? "") == (banks.first ?? "") }).first
        self.selectedBank = _bank
    }
    
    private func showVerificationIdTypePicker() {
        let viewcontroller = self.getPickerViewController()
        let models = self.verificationIdTypes ?? []
        let names = models.compactMap({$0.text})
        viewcontroller.data = names
        viewcontroller.type = PickerTitle.verificationIdTypes
        viewcontroller.doneAction = self.cardTypeSelected
        self.present(viewcontroller, animated: true, completion: nil)
    }
    
    func cardTypeSelected(models: [String]) {
        let _model = self.verificationIdTypes?.filter({($0.text ?? "") == (models.first ?? "") }).first
        self.selectedVerificationIdType = _model
    }
    
    private func showSourceOfFundPicker() {
        let viewcontroller = self.getPickerViewController()
        let models = self.sourceOfFunds ?? []
        let names = models.compactMap({$0.text})
        viewcontroller.data = names
        viewcontroller.type = PickerTitle.sourceOfFund
        viewcontroller.doneAction = self.sourceOfFundSelected
        self.present(viewcontroller, animated: true, completion: nil)
    }
    
    func sourceOfFundSelected(models: [String]) {
        let _model = self.sourceOfFunds?.filter({($0.text ?? "") == (models.first ?? "") }).first
        self.selectedSourceOfFund = _model
    }
}