/// Copyright (c) 2019 Razeware LLC
/// 
/// Permission is hereby granted, free of charge, to any person obtaining a copy
/// of this software and associated documentation files (the "Software"), to deal
/// in the Software without restriction, including without limitation the rights
/// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
/// copies of the Software, and to permit persons to whom the Software is
/// furnished to do so, subject to the following conditions:
/// 
/// The above copyright notice and this permission notice shall be included in
/// all copies or substantial portions of the Software.
/// 
/// Notwithstanding the foregoing, you may not use, copy, modify, merge, publish,
/// distribute, sublicense, create a derivative work, and/or sell copies of the
/// Software in any work that is designed, intended, or marketed for pedagogical or
/// instructional purposes related to programming, coding, application development,
/// or information technology.  Permission for such use, copying, modification,
/// merger, publication, distribution, sublicensing, creation of derivative works,
/// or sale is expressly withheld.
/// 
/// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
/// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
/// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
/// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
/// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
/// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
/// THE SOFTWARE.

import UIKit

class CategoriesTableViewController: UITableViewController {

  // MARK: - Properties

  var categories: [Category] = []
  let categoriesRequest = ResourceRequest<Category>(resourcePath: "categories")

  // MARK: - View Life Cycle
  override func viewDidLoad() {
    super.viewDidLoad()
    tableView.tableFooterView = UIView()
  }

  override func viewWillAppear(_ animated: Bool) {
    super.viewWillAppear(animated)
    refresh(nil)
  }

  func refresh() {
    if refreshControl != nil {
      refreshControl?.beginRefreshing()
    }
    refresh(refreshControl)
  }

  @IBAction func refresh(_ sender: UIRefreshControl?) {
    categoriesRequest.getAll { [weak self] result in
      DispatchQueue.main.async {
        sender?.endRefreshing()
      }
      switch result {
      case .failure:
        ErrorPresenter.showError(message: "There was an error getting the categories", on: self)
      case .success(let categories):
        DispatchQueue.main.async { [weak self] in
          guard let self = self else { return }
          self.categories = categories
          self.tableView.reloadData()
        }
      }
    }
  }
}

// MARK: - UITableViewDataSource
extension CategoriesTableViewController {

  override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    return categories.count
  }

  override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCell(withIdentifier: "CategoryCell", for: indexPath)
    cell.textLabel?.text = categories[indexPath.row].name
    return cell
  }
}
