//
//  MenuViewController.swift
//  AvH Plan
//
//  Created by Deniz Duezgoeren on 11.07.19.
//  Copyright © 2019 Deniz Duezgoeren. All rights reserved.
//

import UIKit

class MenuViewController : UIViewController, UICollectionViewDataSource, UICollectionViewDelegateFlowLayout {
    
    let reuseIdentifier = "cell"
    @IBOutlet weak var collectionView: UICollectionView!
    var items = [String]()
    private let refreshControl = UIRefreshControl()
    let df = DataFetcher()
    
    override func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(animated)
        if #available(iOS 10.0, *) {
            collectionView.refreshControl = refreshControl
        } else {
            collectionView.addSubview(refreshControl)
        }
        refreshControl.addTarget(self, action: #selector(objDoAsync(_:)), for: .valueChanged)
        refreshControl.tintColor = UIColor(red: 0.39, green: 0.71, blue: 0.96, alpha: 1.0)
        refreshControl.attributedTitle = NSAttributedString(string: "Fetching the food menu...")
    }
    
    @objc private func objDoAsync(_ sender: Any) {
        df.doAsync(do: "menu") { menuItems in
            self.items = menuItems as! [String]
            self.collectionView.reloadData()
            self.refreshControl.endRefreshing()
        }
    }
    
    override func viewDidLoad() {
        super.viewDidLoad()
        collectionView.backgroundColor = UIColor(red: 0.8, green: 0.8, blue: 0.8, alpha: 1.0)
        
        self.items = self.df.readMenu()
        self.collectionView.reloadData()
    }
    
    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        return self.items.count
    }
    
    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
        let cell = collectionView.dequeueReusableCell(withReuseIdentifier: reuseIdentifier, for: indexPath as IndexPath) as! MenuViewCell
        if self.items.count != 0 {
            cell.content.text = self.items[indexPath.item]
        }
        
        cell.backgroundColor = UIColor(red: 1.0, green: 1.0, blue: 1.0, alpha: 1.0)
        return cell
    }
    
        func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
            print("You selected cell#\(indexPath.item)!")
        }
    
    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
        return CGSize(width: view.frame.size.width, height: 64)
    }
}