ContentViewController

//
//  ContentViewController.swift
//  AeroBuddy
//
//  Created by Kieran Samuel Cross on 25/12/2019.
//  Copyright © 2019 Luke Collister. All rights reserved.
//

import UIKit

class ContentViewController: UIViewController, UITableViewDelegate, UITableViewDataSource {
    @IBOutlet weak var topicTitle: UINavigationItem!
    @IBOutlet weak var leadingConstraint: NSLayoutConstraint!
    @IBOutlet var tableView: UITableView!
    @IBOutlet weak var civ: ContentItemView!

    var menuShowing = false
    var topic: Topic?
    let dispatchGroup = DispatchGroup()

    func setup(){
        topicTitle.title = topic!.title
    }

    override func viewDidLoad() {
        super.viewDidLoad()
        print( "get it all" )
        parseJSON()

        dispatchGroup.notify(queue: .main ){
            self.civ.contentList = self.topic!.content!
            self.civ.reload()
            self.tableView.reloadData()
            print( "Done getting all" )
        }

    }

    @IBAction func openMenu( _ sender: Any ) {
        if( menuShowing ){
            leadingConstraint.constant = -240
            UIView.animate(withDuration: 0.2, delay: 0.0, options: .curveEaseOut, animations:
            {
                self.view.layoutIfNeeded()
            })
        }else{
            leadingConstraint.constant = 0
            UIView.animate(withDuration: 0.2, delay: 0.0, options: .curveEaseIn, animations:
            {
                self.view.layoutIfNeeded()
            })
        }
        menuShowing = !menuShowing
        print( topic!.content!.count )
        print( tableView.numberOfRows(inSection: 0))
        tableView.reloadData()
    }

    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return topic!.content!.count
    }

    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: "MenuItem", for: indexPath) as! MenuItemCell
        let selCont = topic!.content![indexPath.row]
        cell.label.text = selCont.title
        return cell
    }

    func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
        let selCont = topic!.content![indexPath.row]
        civ.currentContent = indexPath.row
        civ.reload()
        openMenu( self )
        print( selCont )
    }

    func parseJSON() {
        for index in topic!.content!.indices {
            dispatchGroup.enter()
            let url = URL(string: "\(ServHandler.connectProtocol)://\(ServHandler.baseURL)/content/get/\(topic!.content![index].id)")
            let task = URLSession.shared.dataTask(with: url!) {(data, response, error) in

                // Check for errors
                guard error == nil else {
                    print("There was an error")
                    return
                }

                // Check for no data
                guard let content = data else {
                    print("There is no data to show")
                    return
                }

                // Decode the data, which should return the video url and encryption key
                let decoder = JSONDecoder()

                do {
                    let jsonOutput = try decoder.decode(Video.self, from: content)
                    self.topic!.content![index].encKey = jsonOutput.encryption_key
                    self.topic!.content![index].content = jsonOutput.content
                    print( self.topic!.content![index].title )
                    //if( index == self.topic!.content!.indices.last ){
                        self.dispatchGroup.leave()
                    //}
                    return
                }
                catch {
                    print(error.localizedDescription)
                    print(error)
                    return
                }
            }
            task.resume()
        }

    }
}