/**
 * Copyright (c) 2017 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.
 *
 * 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
import Messages

protocol DownloadIndicatorDelegate {
  func viewControllerDidStartDownloading(_ viewController: UIViewController)
  func viewControllerDidStopDownloading(_ viewController: UIViewController)
}

class CharlesInChargeStickerBrowserViewController: MSStickerBrowserViewController {
  var stickers: [MSSticker] = []
  var downloadDelegate: DownloadIndicatorDelegate?

  override func viewDidLoad() {
    super.viewDidLoad()

    let charlesInChargeService = CharlesInChargeService()
    charlesInChargeService.findAndDownloadImages { (searchResults) in
      self.stickers = searchResults.flatMap({ (searchResult) -> MSSticker? in
        return try? MSSticker(contentsOfFileURL: searchResult.thumbnailUrl, localizedDescription: searchResult.title)
      })

      self.downloadDelegate?.viewControllerDidStopDownloading(self)
      self.stickerBrowserView.reloadData()
    }

    downloadDelegate?.viewControllerDidStartDownloading(self)
  }

  override func numberOfStickers(in stickerBrowserView: MSStickerBrowserView) -> Int {
    return stickers.count
  }

  override func stickerBrowserView(_ stickerBrowserView: MSStickerBrowserView, stickerAt index: Int) -> MSSticker {
    return stickers[index]
  }
}
