//
//  FirstViewController.swift
//  Reviews
//
//  Created by Admin on 17/06/15.
//  Copyright (c) 2015 Admin. All rights reserved.
//

import UIKit


class FeedVC: UIViewController, UITableViewDataSource, UITableViewDelegate {

    @IBOutlet var tableView: UITableView!

    var arrayOfPosts: [Post] = [Post]()



    override func viewDidLoad() {
         super.viewDidLoad()
         self.tableView.registerClass(topCell.self, forCellReuseIdentifier: "topCell")
         self.tableView.registerClass(contentCell.self, forCellReuseIdentifier: "contentCell")
         tableView.registerNib(UINib(nibName: "topCell", bundle: nil), forCellReuseIdentifier: "topCell")
         tableView.registerNib(UINib(nibName: "contentCell", bundle: nil), forCellReuseIdentifier: "contentCell")
         self.tableView.delegate = self
         self.tableView.dataSource = self
         self.tableView.rowHeight = UITableViewAutomaticDimension;
         self.tableView.estimatedRowHeight = 44.0;
         self.setUpPost()
         self.shyNavBarManager.scrollView = self.tableView;
    }



    // This function will be called when the Dynamic Type user setting changes (from the system Settings app)
    func contentSizeCategoryChanged(notification: NSNotification)
    {
        tableView.reloadData()
    }


    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

    func setUpPost(){
        var post1 = Post(userName: "Dachnik", timeSincePosted: "two hours ago", profileImage: nil, posterImage: nil)
        for var i = 0; i < 2; i++ {
        arrayOfPosts.append(post1)
        }

    }





    func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
        let nodeCount = arrayOfPosts.count;
    //    if (indexPath.row < 0)
     //   {
          //  let cell:topCell = tableView.dequeueReusableCellWithIdentifier("topCell", forIndexPath: indexPath) as! topCell
          //  cell.userName.text = "Loading..."
      //  }
       //  else
      //   {
            // Leave cells empty if there's no data yet
         //   if (nodeCount > 0)
          //  {
                if (indexPath.row % 2 == 0){
                    // Set up the cell representing the app
                    let cell = tableView.dequeueReusableCellWithIdentifier("topCell", forIndexPath: indexPath) as! topCell
                    let post = arrayOfPosts[indexPath.row]
                    cell.userName.text = post.userName
                    cell.timeSincePosted.text = post.timeSincePosted
                    // Only load cached images; defer new downloads until scrolling ends
                    if (post.profileImage == nil)
                    {
                        if (!tableView.dragging && !tableView.decelerating)
                        {
                            downloadProfileImage(post, indexPath: indexPath)
                            cell.profileImage.image = post.profileImage
                            return cell
                        }
                        // if a download is deferred or in progress, return a placeholder image
                        cell.profileImage.image = UIImage(named: "titanic.jpg")
                                           }
                    else
                    {
                           cell.profileImage.image = post.profileImage
                    }
                    return cell
                }
                // Set up the cell representing the app
                let cell = tableView.dequeueReusableCellWithIdentifier("contentCell", forIndexPath: indexPath) as! contentCell
                let post = arrayOfPosts[indexPath.row]
                // Only load cached images; defer new downloads until scrolling ends
                if (post.posterImage == nil)
                {
                    if (!tableView.dragging && !tableView.decelerating)
                    {


                        downloadPosterImage(post, indexPath: indexPath)
                        cell.posterImage.image = post.posterImage
                        return cell
                       /*
                        let url = NSURL(string: "http://www.freemovieposters.net/posters/titanic_1997_6121_poster.jpg")
                        let data = NSData(contentsOfURL: NSURL(string: "http://www.impawards.com/1997/posters/titanic_ver7.jpg")!) //make sure your image in this url does exist, otherwise unwrap in a if let check
                        cell.posterImage.image = UIImage(data: data!)
                        return cell
                        */
                    }
                    // if a download is deferred or in progress, return a placeholder image


                    cell.posterImage.image = UIImage(named: "img1.jpg")
                }
                else
                {
                    cell.posterImage.image = post.posterImage
            }
        return cell
        }

  //  }

     //   return cell
  //  }


    func loadImagesForOnscreenRows(){
        if (arrayOfPosts.count > 0){
    let visiblePaths:NSArray = tableView.indexPathsForVisibleRows()!
        for indexPath in visiblePaths {
    let post = arrayOfPosts[indexPath.row]

            if (indexPath.row % 2 == 0){
             //   let cell:topCell = tableView.dequeueReusableCellWithIdentifier("topCell", forIndexPath: indexPath as! NSIndexPath) as! topCell
                let cell:topCell = self.tableView.cellForRowAtIndexPath(indexPath as! NSIndexPath) as! topCell
                if (cell.profileImage != post.profileImage){
                    downloadProfileImage(post, indexPath: indexPath as! NSIndexPath)
                     cell.profileImage.image = post.profileImage
                }
            }

          //  let cell:contentCell = tableView.dequeueReusableCellWithIdentifier("contentCell", forIndexPath: indexPath as! NSIndexPath) as! contentCell
            let cell: contentCell = tableView.cellForRowAtIndexPath(indexPath as! NSIndexPath) as! contentCell
            if (cell.posterImage != post.posterImage){
            downloadPosterImage(post, indexPath: indexPath as! NSIndexPath)
             cell.posterImage.image = post.posterImage
              }
            }
        }
    }


    func downloadProfileImage(post: Post, indexPath: NSIndexPath){
     //   println(self.tableView.indexPathsForVisibleRows())
      //  println(indexPath)

      //  let cell:topCell = self.tableView.cellForRowAtIndexPath(indexPath) as! topCell


        post.profileImage = UIImage(named: "img1.jpg")
    }

    func downloadPosterImage(post: Post, indexPath: NSIndexPath){
        let visiblePaths:NSArray = tableView.indexPathsForVisibleRows()!
        println(visiblePaths)
        println(indexPath)
     //   let cell: contentCell = tableView.cellForRowAtIndexPath(indexPath) as! contentCell
        let url = NSURL(string: "http://www.freemovieposters.net/posters/titanic_1997_6121_poster.jpg")
        let data = NSData(contentsOfURL: NSURL(string: "http://www.impawards.com/1997/posters/titanic_ver7.jpg")!)
        post.posterImage = UIImage(data: data!)
    }

    func scrollViewDidEndDragging(scrollView: UIScrollView, willDecelerate decelerate: Bool) {
        if (!decelerate){
            loadImagesForOnscreenRows()
            }
    }

    func scrollViewDidEndDecelerating(scrollView: UIScrollView) {
        loadImagesForOnscreenRows()
    }


    func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
        tableView.deselectRowAtIndexPath(indexPath, animated: false)
    }

    func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        let count = arrayOfPosts.count
        if (count == 0)
        {
            return 7;
        }
        return count;

    }

}