/*
 * Copyright (C) 2015 - 2018, Daniel Dahan and CosmicMind, Inc. <http://cosmicmind.com>.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *	*	Redistributions of source code must retain the above copyright notice, this
 *		list of conditions and the following disclaimer.
 *
 *	*	Redistributions in binary form must reproduce the above copyright notice,
 *		this list of conditions and the following disclaimer in the documentation
 *		and/or other materials provided with the distribution.
 *
 *	*	Neither the name of CosmicMind nor the names of its
 *		contributors may be used to endorse or promote products derived from
 *		this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

import UIKit
import Material
import Graph

class PostsViewController: UIViewController {
  fileprivate var category: String
  
  fileprivate var graph: Graph!
  fileprivate var search: Search<Entity>!
  
  fileprivate var data: [Entity] {
    guard let category = search.sync().first else {
      return [Entity]()
    }
    
    let posts = category.relationship(types: "Post").subject(types: "Article")
    
    return posts.sorted { (a, b) -> Bool in
      return a.createdDate < b.createdDate
    }
  }
  
  fileprivate var tableView: CardTableView!
  
  required init?(coder aDecoder: NSCoder) {
    category = ""
    super.init(coder: aDecoder)
    prepareTabItem()
  }
  
  init(category: String) {
    self.category = category
    super.init(nibName: nil, bundle: nil)
    prepareTabItem()
  }
  
  open override func viewDidLoad() {
    super.viewDidLoad()
    view.backgroundColor = Color.blueGrey.lighten5
    
    // Model.
    prepareGraph()
    prepareSearch()
    
    // Feed.
    prepareTableView()
  }
  
  open override func viewDidAppear(_ animated: Bool) {
    super.viewDidAppear(animated)
    reloadData()
  }
  
  open override func viewWillLayoutSubviews() {
    super.viewWillLayoutSubviews()
    reloadData()
  }
}

fileprivate extension PostsViewController {
  func prepareGraph() {
    graph = Graph()
  }
  
  func prepareSearch() {
    search = Search<Entity>(graph: graph).for(types: "Category").where(properties: ("name", category))
  }
  
  func prepareTabItem() {
    tabItem.title = category
    tabItem.setTitleColor(Color.grey.darken3, for: .selected)
    tabItem.setTitleColor(Color.grey.base, for: .normal)
  }
  
  func prepareTableView() {
    tableView = CardTableView()
    view.layout(tableView).edges()
  }
  
  func reloadData() {
    tableView.data = data
  }
}
