//
//  SuperheroViewController.swift
//  flix_demo
//
//  Created by Jiayi Wang on 2/7/18.
//  Copyright © 2018 Jiayi Wang. All rights reserved.
//

import UIKit
import AlamofireImage

class SuperheroViewController: UIViewController, UICollectionViewDataSource {
    
    let refreshControl = UIRefreshControl()
    @IBOutlet weak var collectionView: UICollectionView!
    
    var movies: [[String: Any]] = []
    override func viewDidLoad() {
        super.viewDidLoad()
        fetchMovies()
        collectionView.dataSource = self
        /*
         refreshControl.addTarget(self, action: #selector(SuperheroViewController.didPullToRefresh(_:)), for: .valueChanged)
         collectionView.insertSubview(refreshControl, at:0)
         */
        // Do any additional setup after loading the view.
    }
    
    @objc func didPullToRefresh(_ refreshControl: UIRefreshControl){
        fetchMovies()
    }
    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        return movies.count
    }
    
    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
        let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "PosterCell", for: indexPath) as! PosterCell
        let movie = movies[indexPath.item]
        if  let posterPathString = movie["poster_path"] as? String{
            let baseURLString = "https://image.tmdb.org/t/p/w500"
            let posterURL = URL(string:baseURLString+posterPathString)!
            cell.posterImageView.af_setImage(withURL: posterURL)
        }
        return cell
    }
    
    func fetchMovies(){
        
        let url = URL(string:"https://api.themoviedb.org/3/movie/now_playing?api_key=a07e22bc18f5cb106bfe4cc1f83ad8ed")!
        let request = URLRequest(url: url, cachePolicy: .reloadIgnoringLocalCacheData, timeoutInterval: 10)
        let session = URLSession(configuration: .default, delegate: nil, delegateQueue: OperationQueue.main)
        let task = session.dataTask(with: request) { (data, response, error) in
            // This will run when the network request returns
            if let error = error{
                print(error.localizedDescription)
            }else if let data = data{
                let dataDictionary = try! JSONSerialization.jsonObject(with: data, options: []) as! [String: Any]
                let movies = dataDictionary["results"] as! [[String: Any]]
                
                self.movies = movies
                self.collectionView.reloadData()
                
                //self.refreshControl.endRefreshing()
            }
        }
        task.resume()
    }
    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }
    
    
    
     // MARK: - Navigation
     
     // In a storyboard-based application, you will often want to do a little preparation before navigation
     override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
        let cell = sender as! UICollectionViewCell
        if let indexPath = collectionView.indexPath(for: cell){
            let movie = movies[indexPath.item]
            let detailViewController = segue.destination as! DetailViewControllers
            detailViewController.movie = movie
        }
     // Get the new view controller using segue.destinationViewController.
     // Pass the selected object to the new view controller.
     }
    
    
}

