//
//  RecipientsViewController.swift
//  GME Remit
//
//  Created by InKwon James Kim on 08/08/2019.
//Copyright © 2019 Gobal Money Express Co. Ltd. All rights reserved.
//

import UIKit
import RxSwift
import RxCocoa
import Localize_Swift

class RecipientsViewController: UIViewController {
  struct StringConstant {
    static let swipeText = ""
    static let sendMoneyText = "Send Money"
    static let newRecipeintText = "New Recipient"
    static let navBarTitle = "Select Recipient"
  }
  
  // MARK: Properties
  var viewModel: RecipientsViewModel!
  
  private let disposeBag = DisposeBag()
  
  private lazy var editTrigger = PublishSubject<Recipient>()
  private lazy var deleteTrigger = PublishSubject<Recipient>()
  private let impact = UISelectionFeedbackGenerator()

  // MARK: Computed Properties
  
  // MARK: IBOutlets
  @IBOutlet private weak var tableView: UITableView!
  @IBOutlet private weak var viewAddRecipient: UIView!
  
  @IBOutlet private weak var newRecipeintLabel: UILabel!
  @IBOutlet private weak var noRecipientLabel: UILabel!
  
  @IBOutlet private var addRecipientTapGestureRecognizer: UITapGestureRecognizer!
  
  @IBOutlet private weak var searchBar: UISearchBar!
  
  // MARK: VC's Life cycle
  override func viewDidLoad() {
    super.viewDidLoad()
    setup()
  }
  
  override func viewWillAppear(_ animated: Bool) {
    super.viewWillAppear(animated)
    self.navigationItem.title = "recipient_listing_title_text".localized()
    setupNormalNavigation()
    setupNavigationShadow(isUse: false)
    configureLanguage()
  }
  
  override func viewWillDisappear(_ animated: Bool) {
    super.viewWillDisappear(animated)
    self.navigationItem.title = ""
    setupNavigationShadow(isUse: true)
    view.endEditing(true)
  }
  // MARK: IBActions
  override func setupTabItem() {
    let image = UIImage.init(named: "ic-sendmoney")
    self.tabBarItem = UITabBarItem(
      title: "send_money_title_text".localized(),
      image: image, selectedImage: nil
    )
    self.tabBarItem.titlePositionAdjustment = UIOffset(
      horizontal: 0,
      vertical: UI_USER_INTERFACE_IDIOM() == .pad ? 2 : -6
    )
  }
}

// MARK: Other Functions
extension RecipientsViewController {
  func configureLanguage() {
    self.newRecipeintLabel.text = "new_recipient".localized()
    self.searchBar.placeholder = "search_text".localized()
  }
  
  private func setup() {
    // all setup should be done here
    viewAddRecipient.hero.id = "setupRecipient"
    
    let colorOption = [NSAttributedString.Key.foregroundColor : UIColor.themeWhite]
    
    let title = NSAttributedString(string: "pull to refresh", attributes: colorOption)
    let refreshControl = UIRefreshControl()
    refreshControl.attributedTitle = title
    refreshControl.backgroundColor = .themeBlue
    refreshControl.tintColor = .themeWhite
    refreshControl.layer.cornerRadius = 5
    
    tableView.refreshControl = refreshControl
    tableView.separatorColor = .themeBorderColor
    
    setBinding()
    
    NotificationCenter.default.addObserver(
      self,
      selector: #selector(setupTabItem),
      name: NSNotification.Name(LCLLanguageChangeNotification),
      object: nil
    )
    
  }
  
  private func setBinding() {
    let viewWillAppear = rx.sentMessage(#selector(UIViewController.viewWillAppear(_:)))
      .mapToVoid()
      .asDriverOnErrorJustComplete()
    
    let needEditTrigger = PublishSubject<Void>()
    
    let input = RecipientsViewModel.Input(
      fetchTrigger: viewWillAppear,
      refreshTrigger: tableView.refreshControl!.rx.controlEvent(.valueChanged).asDriver(),
      addTrigger: addRecipientTapGestureRecognizer.rx.event.mapToVoid().asDriverOnErrorJustComplete(),
      selectTrigger: tableView.rx.itemSelected.asDriver(),
      editTrigger: editTrigger.asDriverOnErrorJustComplete(),
      deleteTrigger: deleteTrigger.asDriverOnErrorJustComplete(),
      needEditTrigger: needEditTrigger.asDriverOnErrorJustComplete(),
      filterText: searchBar.rx.text.asDriverOnErrorJustComplete()
    )
    
    addRecipientTapGestureRecognizer.rx.event.mapToVoid().asDriverOnErrorJustComplete()
      .drive(onNext: { [weak self] in guard let `self` = self else { return }
        self.impact.selectionChanged()
      })
      .disposed(by: disposeBag)
    
    let output = viewModel.transform(input: input)
    
    output
      .recipients
      .map { $0.count != 0 }
      .drive(onNext: { [weak self] in guard let `self` = self else { return }
        self.noRecipientLabel.isHidden = $0
      })
      .disposed(by: disposeBag)
    
    output
      .recipients.drive(
        tableView.rx.items(cellIdentifier: "RecipientCell")
      ) { [weak self] (_, element: Recipient, cell: RecipientCell) in
        guard let `self` = self else { return }
        cell.setModel(with: element)
        cell.hero.modifiers = [.fade, .scale(0.7)]
        cell.delegate = self
      }
      .disposed(by: disposeBag)
    
    output
      .isError.drive(
        onNext: { [weak self] in guard let `self` = self else { return }
          self.alert(type: .error, message: $0.localizedDescription)
        }
      ).disposed(by: disposeBag)
    
    output
      .isProgress.drive(
        onNext: { [weak self] in guard let `self` = self else { return }
          $0 ? self.showProgressHud() : self.hideProgressHud()
          
          if !$0 && self.tableView.refreshControl!.isRefreshing {
            self.tableView.refreshControl?.endRefreshing()
          }
        }
      ).disposed(by: disposeBag)
    
    output
      .isNeedEdit
      .drive(
        onNext: {
          DispatchQueue.main.async { [weak self] in guard let `self` = self else { return }
            self.alertWithOkCancel(
              type: .normal,
              message: "recipient_profile_update_prompt_text".localized(),
              okTitle: "yes_text".localized(),
              cancelTitle: "no_text".localized(),
              okAction: { needEditTrigger.onNext(()) },
              cancelAction: nil
            )
          }
        })
      .disposed(by: disposeBag)
    
    output
      .isPartnerChanged.drive(
        onNext: {
          DispatchQueue.main.async { [weak self] in guard let `self` = self else { return }
            self.alertWithOkCancel(
              type: .normal,
              message: "recipient_bank_update_prompt_text".localized(),
              okTitle: "ok_text".localized(),
              cancelTitle: "cancel_text".localized(),
              okAction: { needEditTrigger.onNext(()) },
              cancelAction: nil
            )
          }
      })
      .disposed(by: disposeBag)
    
    tableView.rx.setDelegate(self).disposed(by: disposeBag)
  }
}

// MARK: - UITableViewDelegate
extension RecipientsViewController: UITableViewDelegate {
  func scrollViewWillBeginDragging(_ scrollView: UIScrollView) {
    view.endEditing(true)
  }
}

// MARK: - RecipientCellDelegate
extension RecipientsViewController: RecipientCellDelegate {
  func edit(didSelect model: Recipient?) {
    guard let model = model else { return }
    self.editTrigger.onNext(model)
  }
  
  func delete(didSelect model: Recipient?) {
    self.alertWithOkCancel(
      message: "delete_recipient_confirmation_text".localized(),
      title: "alert_text".localized(),
      okAction: {
        guard let model = model else { return }
        self.deleteTrigger.onNext(model)
    })
  }
}