//
//  CoolProgress.h

#import <UIKit/UIKit.h>

@interface CoolProgress : UIView

@property (nonatomic, strong) UIColor *lightColor;
@property (nonatomic, strong) UIColor *darkColor;

@property (nonatomic, assign) CGFloat progress;

@end


//
//  CoolProgress.m

#import "CoolProgress.h"

@interface CoolProgress ()

@property (strong, nonatomic) UIView *progressBar;
@property (strong, nonatomic) UILabel *frontLabel;
@property (strong, nonatomic) UILabel *backLabel;

@end

@implementation CoolProgress

- (void)setup {

    _backLabel = [[UILabel alloc] initWithFrame:self.bounds];
    _backLabel.font = [UIFont boldSystemFontOfSize:17];
    _backLabel.backgroundColor = [UIColor clearColor];
    [self addSubview:_backLabel];

    _progressBar = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 0, self.bounds.size.height)];
    _progressBar.clipsToBounds = YES;
    [self addSubview:_progressBar];

    _frontLabel = [[UILabel alloc] initWithFrame:self.bounds];
    _frontLabel.font = [UIFont boldSystemFontOfSize:17];
    _frontLabel.adjustsFontSizeToFitWidth = NO;
    _frontLabel.backgroundColor = [UIColor clearColor];
    _frontLabel.autoresizingMask = 0x0;  // flexible right left and width
    [_progressBar addSubview:_frontLabel];

    self.lightColor = [UIColor yellowColor];
    self.darkColor = [UIColor blueColor];
}

- (id)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {
        [self setup];
    }
    return self;
}

- (id)initWithCoder:(NSCoder *)aDecoder {

    self = [super initWithCoder:aDecoder];
    if (self) {
        [self setup];
    }
    return self;
}

- (void)setLightColor:(UIColor *)lightColor {

    _lightColor = lightColor;
    self.progressBar.backgroundColor = lightColor;
    self.backLabel.textColor = lightColor;
}

- (void)setDarkColor:(UIColor *)darkColor {

    _darkColor = darkColor;
    self.backgroundColor = darkColor;
    self.frontLabel.textColor = darkColor;
}

- (void)setProgress:(CGFloat)progress {

    _progress = progress;
    self.progressBar.frame = CGRectMake(0, 0, progress*self.bounds.size.width, self.bounds.size.height);

    NSString *progressText = [NSString stringWithFormat:@"Progress %d%%", (int)floorf(progress*100)];
    self.frontLabel.text = progressText;
    self.backLabel.text = progressText;
}

@end