class CollectionViewController: UIViewController ,UICollectionViewDelegate,UICollectionViewDataSource,UISearchControllerDelegate, UISearchBarDelegate, UISearchResultsUpdating{

    var items = [Food]()
    var filtered = [Food]()
    var searchActive : Bool = false
    let searchController = UISearchController(searchResultsController: nil)

    // var items = ["ASIAN","SEAFOOD","SUSHI","CAFE","Los Angeles","Austin","Seattle"]


    @IBOutlet var collectionViewController: UICollectionView!
    override func viewDidLoad() {
        super.viewDidLoad()
        // imageViewArray=[#imageLiteral(resourceName: "food18") ,#imageLiteral(resourceName: "food19"),#imageLiteral(resourceName: "food20"),#imageLiteral(resourceName: "food21"),#imageLiteral(resourceName: "food22"),#imageLiteral(resourceName: "food23"),#imageLiteral(resourceName: "food24")]

        self.items.append(Food(title: "View Appointment",    image: UIImage(named: "view appointments@1x.png")))
        self.items.append(Food(title: "Medical Chart",  image:UIImage(named: "medical chart@1x.png")))
        self.items.append(Food(title: "Task",    image:UIImage(named: "tasks@2x.png")))
        self.items.append(Food(title: "Referrals",     image:UIImage(named: "referrals@2x.png")))
        self.items.append(Food(title: "Profile", image:UIImage(named: "profile@2x.png")))
        self.items.append(Food(title: "Wallet",   image:UIImage(named: "wallet@2x.png")))

        collectionViewController.dataSource=self
        collectionViewController.delegate=self

        self.searchController.searchResultsUpdater = self
        self.searchController.delegate = self
        self.searchController.searchBar.delegate = self

        self.searchController.hidesNavigationBarDuringPresentation = false
        self.searchController.dimsBackgroundDuringPresentation = true
        self.searchController.obscuresBackgroundDuringPresentation = false
        searchController.searchBar.placeholder = "Search for tools and resources"
        searchController.searchBar.sizeToFit()

        searchController.searchBar.becomeFirstResponder()

        self.navigationItem.titleView = searchController.searchBar



        // Do any additional setup after loading the view, typically from a nib.
    }
    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {

        if searchActive {
            return filtered.count
        }
        else
        {
            return items.count    //return number of rows in section
        }
    }

    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {

        let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "cell", for: indexPath) as! CategoriesCollectionViewCell

        //configureCell(cell: cell as! toolCollectionViewCell, forItemAtIndexPath: indexPath as NSIndexPath)
        cell.imageViewCell=cell.viewWithTag(1) as! UIImageView
        if searchActive {
            cell.imageViewCell.image = self.filtered[indexPath.row].image
            cell.categoriesTitleLbl.text =  self.filtered[indexPath.row].title
        } else {
            cell.imageViewCell.image = self.items[indexPath.row].image
            cell.categoriesTitleLbl.text =  self.items[indexPath.row].title
        }
        return cell      //return your cell
    }

    func searchBarCancelButtonClicked(_ searchBar: UISearchBar) {
        searchActive = false
        self.dismiss(animated: true, completion: nil)
    }

    func updateSearchResults(for searchController: UISearchController)
    {
        guard let searchString = searchController.searchBar.text else {
            return
        }

        filtered = items.filter({ (item) -> Bool in
            if let title = item.title {
                return title.lowercased().contains(searchString.lowercased())
            } else {
                return false
            }
        })

        collectionViewController.reloadData()
    }

    func searchBarTextDidBeginEditing(_ searchBar: UISearchBar) {
        searchActive = true
        collectionViewController.reloadData()
    }


    func searchBarSearchButtonClicked(_ searchBar: UISearchBar) {
        searchActive = false
        collectionViewController.reloadData()
    }

    func searchBarBookmarkButtonClicked(_ searchBar: UISearchBar) {
        if !searchActive {
            searchActive = true
            collectionViewController.reloadData()
        }

        searchController.searchBar.resignFirstResponder()
    }





}
class Food {
    var title: String?
    var image: UIImage?

    init(title: String?, image: UIImage?) {
        self.title = title
        self.image = image
    }
}

class CategoriesCollectionViewCell: UICollectionViewCell {

    @IBOutlet weak var imageViewCell: UIImageView!
    @IBOutlet weak var categoriesTitleLbl: UILabel!
}