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

import UIKit
import XLPagerTabStrip

protocol KYCForm1Delegate: class {
  func `continue`(model: KycForm1Model)
  func show(model: KycModel)
  func addModel(model: KycForm1Model)
}

protocol KYCForm2Delegate: class {
  func addModel(model: KycForm2Model)
  func `continue`(model: KycForm2Model)
}

protocol KYCForm3Delegate: class {
  func isAllCompleted(isCompletedKYC3: Bool) -> Bool
  func submit(model: KycForm3Model)
}

class KYCRequestModel {
  var kycForm1: KycForm1Model?
  var kycForm2: KycForm2Model?
  var kycForm3: KycForm3Model?
}

class KycViewController: ButtonBarPagerTabStripViewController {
  
  enum KycViewControllers: Int {
    case form1 = 0
    case form2
    case fomr3
  }
  
  struct Constants {
    static let stateRedColor = UIColor.init(hex: "#EC1C24")
    static let stateGreenColor = UIColor.init(hex: "8CC241")
    static let stateLabelGreyColor = UIColor.init(hex: "4a4a4a")
    static let xlbarButtonTextColor = UIColor.init(hex: "#ed1c24")
    static let xlOldSelectedCellColor = UIColor.init(hex: "#7b7a7a")
    static let xlTabBarFont = UIFont.sanfrancisco(.bold, size: 14)
  }
  
  // MARK: IBOutlets
  
  // MARK: Properties
  
  var form1: UIViewController = UIViewController()
  var form2: UIViewController = UIViewController()
  var form3: UIViewController = UIViewController()
  
  var errorOnForm1 = false
  var errorOnForm2 = false
  var errorOnForm3 = false
  
  var requestModel: KYCRequestModel?
  var kycModel: KycModel? {
    didSet {
      if let vc2 = self.form2 as? KycForm2ViewController {
        vc2.kycModel = self.kycModel
      }
    }
  }
  
  var presenter: KycModuleInterface?
  
  // MARK: VC's Life cycle
  
  override func viewDidLoad() {
    buttonBarView.selectedBar.backgroundColor = Constants.xlbarButtonTextColor
    settings.style.buttonBarBackgroundColor = .themeMainBackground
    settings.style.buttonBarItemBackgroundColor = .themeMainBackground
    settings.style.buttonBarItemFont = Constants.xlTabBarFont
    settings.style.selectedBarHeight = 2
    settings.style.selectedBarBackgroundColor = Constants.xlbarButtonTextColor
    settings.style.buttonBarMinimumLineSpacing = 0
    settings.style.buttonBarItemsShouldFillAvailiableWidth = true
    settings.style.buttonBarLeftContentInset = 0
    settings.style.buttonBarRightContentInset = 0
    
    changeCurrentIndexProgressive = {(
      oldCell: ButtonBarViewCell?,
      newCell: ButtonBarViewCell?,
      progressPercentage: CGFloat,
      changeCurrentIndex: Bool,
      animated: Bool
    ) -> Void in
      guard changeCurrentIndex == true else { return }
      oldCell?.label.textColor = Constants.xlOldSelectedCellColor
      newCell?.label.textColor = Constants.xlbarButtonTextColor
    }
    super.viewDidLoad()
    self.setup()
  }
  
  override func viewControllers(
    for pagerTabStripController: PagerTabStripViewController
  ) -> [UIViewController] {
    self.form1 = KycForm1Wireframe().getMainViewWithDelegate(delegate: self)
    self.form2 = KycForm2Wireframe().getMainViewWithDelegate(delegate: self)
    self.form3 = KycForm3Wireframe().getMainViewWithDelegate(delegate: self)
    return [form1, form2, form3]
  }
  
  // MARK: IBActions
  
  // MARK: Other Functions
  
  private func setup() {
    // all setup should be done here
    self.requestModel = KYCRequestModel()
    self.setupPicturedNavBar()
    self.navigationItem.setHidesBackButton(true, animated: true)
  }
  
  func initiateSubmitProcess() {
    // first validate.
    guard let requestModel = self.requestModel else {return}
    self.presenter?.submit(model: requestModel)
    // if error show them to respect page (if possible)
    // then submit to server.
    // then show result.
    
  }
  
  private func showErrorView() {
    if self.errorOnForm1 {
      self.moveToViewController(at: KycViewControllers.form1.rawValue)
    } else if self.errorOnForm2 {
      self.moveToViewController(at: KycViewControllers.form2.rawValue)
    } else if errorOnForm3 {
      self.moveToViewController(at: KycViewControllers.fomr3.rawValue)
    }
  }
}

// MARK: KycViewInterface
extension KycViewController: KycViewInterface {
  
  func show(error: String) {
    self.alert(type: .error, message: error)
  }
  
  func showLoading() {
    self.showProgressHud()
  }
  
  func hideLoading() {
    self.hideProgressHud()
  }
}

extension KycViewController: KYCForm1Delegate {
  
  func addModel(model: KycForm1Model) {
    self.requestModel?.kycForm1 = model
  }
  
  func `continue`(model: KycForm1Model) {
    self.requestModel?.kycForm1 = model
    moveToViewController(at: KycViewControllers.form2.rawValue)
  }
  
  func view1DisappearWith(model: KycForm1Model) {
    self.requestModel?.kycForm1 = model
  }
  
  func show(model: KycModel) {
    self.kycModel = model
  }
}

extension KycViewController: KYCForm2Delegate {
  
  func addModel(model: KycForm2Model) {
    self.requestModel?.kycForm2 = model
  }
  
  func `continue`(model: KycForm2Model) {
    self.requestModel?.kycForm2 = model
    moveToViewController(at: KycViewControllers.fomr3.rawValue)
  }
}

extension KycViewController: KYCForm3Delegate {
  func isAllCompleted(isCompletedKYC3: Bool) -> Bool {
    return requestModel?.kycForm1?.isCompleted ?? false &&
      requestModel?.kycForm2?.isCompleted ?? false &&
    isCompletedKYC3
  }
  
  func submit(model: KycForm3Model) {
    self.requestModel?.kycForm3 = model
    self.initiateSubmitProcess()
  }
}