LONDON-IOS/GME Remit/Utilities/SearchAddress/User Interface/View/SearchAddressViewController.swift

//
//  AddressSearchViewController.swift
//  GME Remit
//
//  Created by InKwon Devik Kim on 22/04/2019.
//Copyright © 2019 Gobal Money Express Co. Ltd. All rights reserved.
//

import UIKit

protocol SearchAddressDelegate: class {
  func searchAddress(viewController: SearchAddressViewController, selectedJuso: Juso)
}

class SearchAddressViewController: UIViewController {
  
  // MARK: Properties
  
  var presenter: SearchAddressModuleInterface?
  weak var delegate: SearchAddressDelegate?
  
  private var model: JusoResult? {
    didSet {
      guard
        let juso = self.model?.juso,
        let total = self.model?.common?.totalCount,
        let totalCount = Int(total) else { return }
      
      self.totalCount = totalCount
      self.jusoList.append(contentsOf: juso)
      self.tableView.reloadData()
      
      self.moveToTop()
      
      self.noResultLabel.text = self.totalCount == 0 ? "No results were found for your search." : ""
    }
  }
  
  private var jusoList = [Juso]()
  
  private var interval = 10
  
  private var pageIndex = 1
  
  private var totalCount = 0
  
  private var isSearch = false
  
  private var searchedText = "" {
    didSet {
      self.presenter?.fetchAddress(
        pageIndex: self.pageIndex,
        interval: self.interval,
        keyword: self.searchedText
      )
    }
  }
  // MARK: IBOutlets
  
  @IBOutlet private weak var tableView: UITableView!
  @IBOutlet private weak var searchBar: UISearchBar!
  @IBOutlet private weak var noResultLabel: UILabel!
  
  // MARK: VC's Life cycle
  
  override func viewDidLoad() {
    super.viewDidLoad()
    self.setup()
    self.searchBar.becomeFirstResponder()
  }
  
  override func viewWillAppear(_ animated: Bool) {
    super.viewWillAppear(animated)
    self.title = "Search Address"
  }
  
  override func viewWillDisappear(_ animated: Bool) {
    super.viewWillDisappear(animated)
    
    self.view.endEditing(true)
  }
  
  // MARK: IBActions
  
  @IBAction private func touchCloseButton(_ sender: UIBarButtonItem) {
    self.dismiss(animated: true, completion: nil)
  }
  
  // MARK: Other Functions
  
  private func setup() {
    // all setup should be done here
    self.tableView.delegate = self
    self.tableView.dataSource = self
    self.searchBar.delegate = self
    
    //        self.setLargeTitle()
    //        self.setSearchBarAppearance()
  }
  
  private func setSearchBarAppearance() {
    let textFieldInsideUISearchBar = self.searchBar.value(forKey: "searchField") as? UITextField
    textFieldInsideUISearchBar?.font = .sanfrancisco(.regular, size: 14)
    
    let textFieldInsideUISearchBarLabel = textFieldInsideUISearchBar!
      .value(forKey: "placeholderLabel") as? UILabel
    textFieldInsideUISearchBarLabel?.font = .sanfrancisco(.regular, size: 14)
  }
  
  private func clear() {
    self.totalCount = 0
    self.pageIndex = 0
    self.jusoList.removeAll()
  }
  
  private func moveToTop() {
    if self.isSearch {
      let indexPath = NSIndexPath(row: NSNotFound, section: 0)
      self.tableView.scrollToRow(at: indexPath as IndexPath, at: .top, animated: false)
      self.isSearch = false
    }
  }
}

// MARK: AddressSearchViewInterface
extension SearchAddressViewController: SearchAddressViewInterface {
  func setJusoModel(with model: JusoResult?) {
    self.model = model
  }
  
  func failure(with error: Error) {
    self.alertWithOk(message: error.localizedDescription)
  }
  
  func startLoading() {
    self.showProgressHud()
  }
  
  func endLoading() {
    self.hideProgressHud()
  }
}

extension SearchAddressViewController: UITableViewDataSource {
  func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    return jusoList.count
  }
  
  func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    guard let cell = tableView.dequeueReusableCell(
      withIdentifier: "AddressTableViewCell"
      ) as? AddressTableViewCell else {
        return UITableViewCell()
    }
    
    cell.setModel(with: self.jusoList[indexPath.row])
    
    return cell
  }
}

extension SearchAddressViewController: UITableViewDelegate {
  func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
    self.delegate?.searchAddress(viewController: self, selectedJuso: self.jusoList[indexPath.row])
  }
  
  func tableView(_ tableView: UITableView, willDisplay cell: UITableViewCell, forRowAt indexPath: IndexPath) {
    if indexPath.row + 1 == self.jusoList.count &&
      indexPath.row + 1 < self.totalCount {
      self.pageIndex += 1
      self.presenter?.fetchAddress(
        pageIndex: self.pageIndex,
        interval: self.interval,
        keyword: self.searchedText
      )
    }
  }
}

extension SearchAddressViewController: UISearchBarDelegate {
  func searchBarSearchButtonClicked(_ searchBar: UISearchBar) {
    self.clear()
    
    guard let address = searchBar.text else {
      return
    }
    
    self.isSearch = true
    self.searchedText = address
    self.searchBar.resignFirstResponder()
  }
}