/*

 Copyright (C) 2014 Apple Inc. All Rights Reserved.

 See LICENSE.txt for this sample’s licensing information

 Abstract:

  A collection of methods related to the look and feel of the application.

 */

#import "AAPLStyleUtilities.h"

static const CGFloat AAPLOverlayCornerRadius = 10.0;

static const CGFloat AAPLButtonVerticalContentInset = 10.0;

static const CGFloat AAPLButtonHorizontalContentInset = 10.0;

static const CGFloat AAPLOverlayMargin = 20.0;

static const CGFloat AAPLContentVerticalMargin = 50.0;

static const CGFloat AAPLContentHorizontalMargin = 30.0;

@implementation AAPLStyleUtilities

+ (UIColor *)foregroundColor {

    return [UIColor colorWithRed:75.0/255 green:35.0/255 blue:106.0/255 alpha:1.0];

}

+ (UIColor *)overlayColor {

    if (UIAccessibilityIsReduceTransparencyEnabled()) {

        return [UIColor whiteColor];

    }

    return [UIColor colorWithWhite:1.0 alpha:0.8];

}

+ (UIColor *)cardBorderColor {

    return [self foregroundColor];

}

+ (UIColor *)cardBackgroundColor {

    return [UIColor whiteColor];

}

+ (UIColor *)detailColor {

    if (UIAccessibilityDarkerSystemColorsEnabled()) {

        return [UIColor blackColor];

    }

    return [UIColor grayColor];

}

+ (UIColor *)detailOnOverlayColor {

    return [UIColor blackColor];

}

+ (UIColor *)detailOnOverlayPlaceholderColor {

    return [UIColor darkGrayColor];

}

+ (UIColor *)previewTabLabelColor {

    return [UIColor whiteColor];

}

+ (CGFloat)overlayCornerRadius {

    return AAPLOverlayCornerRadius;

}

+ (CGFloat)overlayMargin {

    return AAPLOverlayMargin;

}

+ (CGFloat)contentHorizontalMargin {

    return AAPLContentHorizontalMargin;

}

+ (CGFloat)contentVerticalMargin {

    return AAPLContentVerticalMargin;

}

+ (UIImage *)overlayRoundedRectImage {

    static UIImage *roundedRectImage = nil;

    static dispatch_once_t onceToken;

    dispatch_once(&onceToken, ^{

        CGSize imageSize = CGSizeMake(2 * AAPLOverlayCornerRadius, 2 * AAPLOverlayCornerRadius);

        UIGraphicsBeginImageContextWithOptions(imageSize, NO, [[UIScreen mainScreen] scale]);

        UIBezierPath *roundedRect = [UIBezierPath bezierPathWithRoundedRect:CGRectMake(0.0, 0.0, imageSize.width, imageSize.height) cornerRadius:AAPLOverlayCornerRadius];

        [[self overlayColor] set];

        [roundedRect fill];

        roundedRectImage = UIGraphicsGetImageFromCurrentImageContext();

        roundedRectImage = [roundedRectImage resizableImageWithCapInsets:UIEdgeInsetsMake(AAPLOverlayCornerRadius, AAPLOverlayCornerRadius, AAPLOverlayCornerRadius, AAPLOverlayCornerRadius)];

        UIGraphicsEndImageContext();

    });

    return roundedRectImage;

}

+ (UIButton *)overlayRoundedRectButton {

    UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];

    button.translatesAutoresizingMaskIntoConstraints = NO;

    [button setTitleColor:[self foregroundColor] forState:UIControlStateNormal];

    button.titleLabel.font = [self largeFont];

    [button setBackgroundImage:[self overlayRoundedRectImage] forState:UIControlStateNormal];

    [button setContentEdgeInsets:UIEdgeInsetsMake(AAPLButtonVerticalContentInset, AAPLButtonHorizontalContentInset, AAPLButtonVerticalContentInset, AAPLButtonHorizontalContentInset)];

    return button;

}

+ (NSString *)fontName {

    if (UIAccessibilityIsBoldTextEnabled()) {

        return @"Avenir-Medium";

    }

    return @"Avenir-Light";

}

+ (UIFont *)standardFont {

    return [UIFont fontWithName:[self fontName] size:14.0];

}

+ (UIFont *)largeFont {

    return [UIFont fontWithName:[self fontName] size:18.0];

}

+ (UILabel *)standardLabel {

    UILabel *label = [[UILabel alloc] init];

    label.textColor = [self foregroundColor];

    label.font = [self standardFont];

    label.numberOfLines = 0; // don't force it to be a single line

    label.translatesAutoresizingMaskIntoConstraints = NO;

    return label;

}

+ (UILabel *)detailLabel {

    UILabel *label = [self standardLabel];

    label.textColor = [self detailColor];

    return label;

}

@end