- (NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView
{
    return 1;
}


-(NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section
{
    return [[self objects] count];
}

-(UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath object:(PFObject *)object
{
    NSArray *people = [self objects];
    static NSString *CellIdentifier = @"Cell";

    VAGGarmentCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier: CellIdentifier forIndexPath:indexPath];


    PFObject *current;

    current = [people objectAtIndex:indexPath.item];

    PFFile *userImageFile = current[@"image"];

    [userImageFile getDataInBackgroundWithBlock:^(NSData *imageData, NSError *error) {
        UIImage *image = [UIImage imageWithData:imageData];

        [[cell contentView] setContentMode: UIViewContentModeScaleAspectFit];
        [[cell imageView] setImage:image];

    }];

    [[cell title] setText:[current valueForKey:@"title"]];
    [[cell price] setText:[NSString stringWithFormat: @"£%@", [current valueForKey:@"price"]]];

    return cell;

}

-(UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath object:(PFObject *)object
{

    NSArray *people = [self objects];

    static NSString *CellIdentifier = @"Cell";

    VAGGarmentCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier: CellIdentifier forIndexPath:indexPath];



    PFObject *current;

    current = [people objectAtIndex:indexPath.item];



    PFFile *userImageFile = current[@"image"];

    [userImageFile getDataInBackgroundWithBlock:^(NSData *imageData, NSError *error) {

        if (!error)
        {

            if (!image) {
                [[cell imageView] setImage:[UIImage imageNamed:@"placeholder.png"]];


            }   else {

                image = [UIImage imageWithData:imageData];


                //resize image
                CGSize destinationSize = CGSizeMake(158,187);
                UIGraphicsBeginImageContext(destinationSize);
                [image drawInRect:CGRectMake(0,0,destinationSize.width, destinationSize.height)];

                //New image
                UIImage*newImage = UIGraphicsGetImageFromCurrentImageContext();
                UIGraphicsEndImageContext();

                //Optimise image
                NSData *imageDataCompressed = UIImageJPEGRepresentation(newImage, 0.4f);
                //  NSLog(@"Image Size %@", NSStringFromCGSize(newImage.size));//log size of image
                    NSLog(@"%@", [current valueForKey:@"title"]);


                [[cell imageView] setImage:[UIImage imageWithData:imageDataCompressed]];



            }

        }

    }];


    [[cell title] setText:[current valueForKey:@"title"]];
    [[cell price] setText:[NSString stringWithFormat: @"£%@", [current valueForKey:@"price"]]];


    return cell;

}

-(UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath object:(PFObject *)object
{

    NSArray *people = [self objects];

    static NSString *CellIdentifier = @"Cell";

    VAGGarmentCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier: CellIdentifier forIndexPath:indexPath];

    [cell.activityIndicator startAnimating];

    PFObject *current;

    current = [people objectAtIndex:indexPath.item];



    PFFile *userImageFile = current[@"image"];

    NSURL *url = [NSURL URLWithString:[NSString stringWithFormat:userImageFile.url, indexPath.item]];
    NSURLRequest *urlRequest = [NSURLRequest requestWithURL:url                                                                   cachePolicy:NSURLRequestReturnCacheDataDontLoad
                    timeoutInterval:6.0];
                    [cell.imageView setImageWithURLRequest:urlRequest
                    placeholderImage:[UIImage imageNamed:@"placeholder.png"]
                    success:^(NSURLRequest *request, NSHTTPURLResponse *response, UIImage *image) {

                    //resize image
                    CGSize destinationSize = CGSizeMake(158,187);
                    UIGraphicsBeginImageContext(destinationSize);
                    [image drawInRect:CGRectMake(0,0,destinationSize.width, destinationSize.height)];

                    //New image
                    UIImage*newImage = UIGraphicsGetImageFromCurrentImageContext();
                    UIGraphicsEndImageContext();

                    //Optimise image
                    NSData *imageDataCompressed = UIImageJPEGRepresentation(newImage, 0.4f);

                    cell.imageView.image = [UIImage imageWithData:imageDataCompressed];
                    NSLog(@"Image Size %@", NSStringFromCGSize(newImage.size));//log size of image
                   [cell.activityIndicator stopAnimating];

                    } failure:^(NSURLRequest *request, NSHTTPURLResponse *response, NSError          *error) {
                    NSLog(@"Failed to download image: %@", error);
                                        }];




    return cell;

}

- (void)grabDataFromCloud
{

    self.model = [NSMutableArray array];
    for (PFObject *object in [self objects]) {
        PFFile *imageFile = [object valueForKey:@"image"];
        NSURL *url = [NSURL URLWithString:imageFile.url];

        NSMutableDictionary *newObject = [NSMutableDictionary dictionaryWithDictionary:@{@"title": [object valueForKey:@"title"], @"price": [object valueForKey:@"price"], @"imageUrl": url}];
        [[self model] addObject:newObject];
    }
}

-(UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath object:(PFObject *)object
{

    [self grabDataFromCloud];
    static NSString *CellIdentifier = @"Cell";

    VAGGarmentCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier: CellIdentifier forIndexPath:indexPath];

    [cell.activityIndicator setHidden:YES];

    NSMutableDictionary* d = [self.model objectAtIndex:indexPath.item];
    cell.title.text = d[@"title"];
    cell.price.text = [NSString stringWithFormat:@"£%@", d[@"price"]];

    if (d[@"image"]) {
         cell.imageView.image = d[@"image"];
    } else { // if not, download it
        cell.imageView.image = nil;

        dispatch_queue_t backgroundQueue = dispatch_queue_create("test", 0);

        dispatch_async(backgroundQueue, ^{

             NSData* data = [NSData dataWithContentsOfURL:d[@"imageUrl"]];
             UIImage* img = [UIImage imageWithData:data];
             d[@"image"] = img;
                 dispatch_async(dispatch_get_main_queue(), ^{
                    //causes crash Assertion failure in -[UICollectionView _endItemAnimations],
                    // /SourceCache/UIKit/UIKit-2935.137/UICollectionView.m:3687
                     //   [self.collectionView reloadItemsAtIndexPaths:@[indexPath]];
                 });
        });

    }

        return cell;
    }

- (UITableViewCell *)tableView:(UITableView *)tableView
         cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"Cell" forIndexPath:indexPath];
    NSMutableDictionary* d = (self.model)[indexPath.row];
    cell.textLabel.text = d[@"text"];
    if (d[@"im"]) { // if we have a picture, supply it
        cell.imageView.image = d[@"im"];
    } else if (!d[@"task"]) { // if not, download it
        cell.imageView.image = nil;
        NSURLSessionTask* task = [self.downloader download:d[@"picurl"]
                                         completionHandler:^(NSURL* url){
            if (!url)
                return;
            NSData* data = [NSData dataWithContentsOfURL:url];
            UIImage* im = [UIImage imageWithData:data];
            d[@"im"] = im;
            dispatch_async(dispatch_get_main_queue(), ^{
                [self.tableView reloadRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationNone];
            });
        }];
    }
    return cell;
}

- (void)setImageWithURL:(NSURL *)url placeholderImage:(UIImage *)placeholderImage;