/*

 Copyright (C) 2018 Apple Inc. All Rights Reserved.

 See LICENSE.txt for this sample’s licensing information

 Abstract:

 View for displaying the loading status.

 */

#import "LoadingStatus.h"

@interface LoadingStatus ()

@property (nonatomic, strong) UIActivityIndicatorView *progress;

@property (nonatomic, strong) UILabel *loadingLabel;

@end

#pragma mark -

@implementation LoadingStatus

+ (id)defaultLoadingStatusWithWidth:(CGFloat)width {

    return [[LoadingStatus alloc] initWithFrame:CGRectMake(0.0, 0.0, width, 40.0)];

}

- (id)initWithFrame:(CGRect)frame {

    if ((self = [super initWithFrame:frame])) {

        self.backgroundColor = [UIColor colorWithRed:0.0f green:0.0f blue:0.0f alpha:0.4f];

        NSString *loadingString = @"Loading Photos…";

        UIFont *loadingFont = [UIFont boldSystemFontOfSize:17.0f];

        NSDictionary *attrs = @{NSFontAttributeName:loadingFont};

        CGRect rect = [loadingString boundingRectWithSize:CGSizeMake(CGRectGetWidth(frame), CGRectGetHeight(frame))

                                         options:(NSStringDrawingUsesLineFragmentOrigin | NSStringDrawingUsesFontLeading)

                                      attributes:attrs

                                         context:nil];

        CGSize labelSize = rect.size;

        CGFloat centerX = floor((CGRectGetWidth(frame) / 2.0f) - (labelSize.width / 2.0f));

        CGFloat centerY = floor((CGRectGetHeight(frame) / 2.0f) - (labelSize.height / 2.0f));

        _loadingLabel = [[UILabel alloc] initWithFrame: CGRectMake(centerX, centerY, labelSize.width, labelSize.height)];

        self.loadingLabel.backgroundColor = [UIColor clearColor];

        self.loadingLabel.textColor = [UIColor whiteColor];

        self.loadingLabel.text = loadingString;

        self.loadingLabel.font = loadingFont;

        _progress = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhite];

        CGRect progressFrame = self.progress.frame;

        progressFrame.origin.x = centerX - CGRectGetWidth(progressFrame) - 8.0f;

        progressFrame.origin.y = centerY;

        self.progress.frame = progressFrame;

        [self addSubview:self.progress];

        [self addSubview:self.loadingLabel];

    }

    return self;

}

- (void)willRemoveSubview:(UIView *)subview {

    if (subview == self.progress)

        [self.progress stopAnimating];

    [super willRemoveSubview:subview];

}

- (void)didMoveToWindow {

    [super didMoveToWindow];

    [self.progress startAnimating];

}

- (void)removeFromSuperviewWithFade {

    [UIView animateWithDuration:0.3f animations:^(void) {

        self.alpha = 0.0f;

    } completion:^(BOOL finished) {

        if (finished) {

            [self removeFromSuperview];

        }

    }];

}

@end