#import "BTUIKAppearance.h"
#import "UIColor+BTUIK.h"

@interface BTUIKAppearance ()

@property (nonatomic, strong) UIFont *font;
@property (nonatomic, strong) UIFont *boldFont;

@end

@implementation BTUIKAppearance

static BTUIKAppearance *sharedTheme;

+ (instancetype)sharedInstance {
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        sharedTheme = [BTUIKAppearance new];
        [sharedTheme setDefaultProperties];
        [sharedTheme setLightColors];
    });
    
    return sharedTheme;
}

- (void)setDefaultProperties {
    sharedTheme.font = [UIFont systemFontOfSize:10];
    sharedTheme.boldFont = [UIFont boldSystemFontOfSize:10];
    sharedTheme.useBlurs = YES;
    sharedTheme.postalCodeFormFieldKeyboardType = UIKeyboardTypeDefault;
}

- (void)setLightColors {
    sharedTheme.barBackgroundColor = UIColor.whiteColor;
    sharedTheme.formBackgroundColor = [UIColor btuik_colorFromHex:@"EFEFF4" alpha:1.0];
    sharedTheme.formFieldBackgroundColor =  UIColor.whiteColor;
    sharedTheme.primaryTextColor = UIColor.blackColor;
    sharedTheme.secondaryTextColor = [UIColor btuik_colorFromHex:@"666666" alpha:1.0];
    sharedTheme.placeholderTextColor = UIColor.lightGrayColor;
    sharedTheme.lineColor = [UIColor btuik_colorFromHex:@"BFBFBF" alpha:1.0];
    sharedTheme.blurStyle = UIBlurEffectStyleExtraLight;
    sharedTheme.activityIndicatorViewStyle = UIActivityIndicatorViewStyleGray;
    [sharedTheme setDefaultColors];
}

- (void)setDarkColors {
    sharedTheme.barBackgroundColor = [UIColor btuik_colorFromHex:@"222222" alpha:1.0];
    sharedTheme.formBackgroundColor = [UIColor btuik_colorFromHex:@"222222" alpha:1.0];
    sharedTheme.formFieldBackgroundColor = [UIColor btuik_colorFromHex:@"333333" alpha:1.0];
    sharedTheme.primaryTextColor = UIColor.whiteColor;
    sharedTheme.secondaryTextColor = [UIColor btuik_colorFromHex:@"999999" alpha:1.0];
    sharedTheme.placeholderTextColor = [UIColor btuik_colorFromHex:@"8E8E8E" alpha:1.0];
    sharedTheme.lineColor = [UIColor btuik_colorFromHex:@"666666" alpha:1.0];
    sharedTheme.blurStyle = UIBlurEffectStyleDark;
    sharedTheme.activityIndicatorViewStyle = UIActivityIndicatorViewStyleWhite;
    [sharedTheme setDefaultColors];
}

- (void)setDynamicColors {
    if (@available(iOS 13, *)) {
        sharedTheme.barBackgroundColor = UIColor.systemBackgroundColor;
        sharedTheme.formBackgroundColor = UIColor.systemGroupedBackgroundColor;
        sharedTheme.formFieldBackgroundColor = UIColor.secondarySystemGroupedBackgroundColor;
        sharedTheme.primaryTextColor = UIColor.labelColor;
        sharedTheme.secondaryTextColor = UIColor.secondaryLabelColor;
        sharedTheme.placeholderTextColor = UIColor.placeholderTextColor;
        sharedTheme.lineColor = UIColor.separatorColor;
        sharedTheme.blurStyle = UIBlurEffectStyleSystemMaterial;
        sharedTheme.activityIndicatorViewStyle = UIActivityIndicatorViewStyleMedium;
        
        sharedTheme.overlayColor = [UIColor.blackColor colorWithAlphaComponent:0.5];
        sharedTheme.tintColor = UIColor.systemBlueColor;
        sharedTheme.disabledColor = UIColor.systemGrayColor;
        sharedTheme.errorForegroundColor = UIColor.systemRedColor;
        sharedTheme.switchThumbTintColor =  UIColor.whiteColor;
        sharedTheme.switchOnTintColor = UIColor.systemGreenColor;
    }
}

- (void)setDefaultColors {
    sharedTheme.overlayColor = [UIColor btuik_colorFromHex:@"000000" alpha:0.5];
    sharedTheme.tintColor = [UIColor btuik_colorFromHex:@"2489F6" alpha:1.0];
    sharedTheme.disabledColor = UIColor.lightGrayColor;
    sharedTheme.errorForegroundColor = [UIColor btuik_colorFromHex:@"ff3b30" alpha:1.0];
    sharedTheme.switchThumbTintColor =  UIColor.whiteColor;
    sharedTheme.switchOnTintColor = UIColor.greenColor;
}

- (void)setColorScheme:(enum BTUIKColorScheme)colorScheme {
    _colorScheme = colorScheme;
    switch (colorScheme) {
        case BTUIKColorSchemeLight:
            [sharedTheme setLightColors];
            sharedTheme.keyboardAppearance = UIKeyboardAppearanceLight;
            break;
        case BTUIKColorSchemeDark:
            [sharedTheme setDarkColors];
            sharedTheme.keyboardAppearance = UIKeyboardAppearanceDark;
            break;
        case BTUIKColorSchemeDynamic:
            [sharedTheme setDynamicColors];
            break;
    }
}

- (void)setFontFamily:(NSString *)fontFamily {
    _fontFamily = fontFamily;
    if (fontFamily != nil) {
        _font = [UIFont fontWithName:fontFamily size:10.0];
    } else {
        _font = [UIFont systemFontOfSize:10.0];
    }
}

- (void)setBoldFontFamily:(NSString *)boldFontFamily {
    _boldFontFamily = boldFontFamily;
    if (boldFontFamily != nil) {
        _boldFont = [UIFont fontWithName:boldFontFamily size:10.0];
    } else {
        _boldFont = [UIFont boldSystemFontOfSize:10.0];
    }
}

- (UIColor *)highlightedTintColor {
    return [sharedTheme.tintColor colorWithAlphaComponent:0.4];
}

+ (void)styleLabelPrimary:(UILabel *)label {
    label.font = [[BTUIKAppearance sharedInstance].font fontWithSize:UIFont.labelFontSize];
    label.textColor = [BTUIKAppearance sharedInstance].primaryTextColor;
}

+ (void)styleLabelBoldPrimary:(UILabel *)label {
    label.font = [[BTUIKAppearance sharedInstance].boldFont fontWithSize:UIFont.labelFontSize];
    label.textColor = [BTUIKAppearance sharedInstance].primaryTextColor;
}

+ (void)styleSmallLabelBoldPrimary:(UILabel *)label {
    label.font = [[BTUIKAppearance sharedInstance].boldFont fontWithSize:UIFont.smallSystemFontSize];
    label.textColor = [BTUIKAppearance sharedInstance].primaryTextColor;
}

+ (void)styleSmallLabelPrimary:(UILabel *)label {
    label.font = [[BTUIKAppearance sharedInstance].font fontWithSize:UIFont.smallSystemFontSize];
    label.textColor = [BTUIKAppearance sharedInstance].primaryTextColor;
}

+ (void)styleLabelSecondary:(UILabel *)label {
    label.font = [[BTUIKAppearance sharedInstance].font fontWithSize:UIFont.smallSystemFontSize];
    label.textColor = [BTUIKAppearance sharedInstance].secondaryTextColor;
}

+ (void)styleLargeLabelSecondary:(UILabel *)label {
    label.font = [[BTUIKAppearance sharedInstance].font fontWithSize:UIFont.labelFontSize];
    label.textColor = [BTUIKAppearance sharedInstance].secondaryTextColor;
}

+ (void)styleSystemLabelSecondary:(UILabel *)label {
    label.font = [[BTUIKAppearance sharedInstance].font fontWithSize:UIFont.systemFontSize];
    label.textColor = [BTUIKAppearance sharedInstance].secondaryTextColor;
}

+ (UILabel *)styledNavigationTitleLabel {
    UILabel *tlabel = [[UILabel alloc] initWithFrame:CGRectMake(0,0, 200, 40)];
    tlabel.textAlignment = NSTextAlignmentCenter;
    tlabel.textColor = [BTUIKAppearance sharedInstance].navigationBarTitleTextColor;
    tlabel.font = [[BTUIKAppearance sharedInstance].boldFont fontWithSize:UIFont.labelFontSize];
    tlabel.backgroundColor = UIColor.clearColor;
    tlabel.adjustsFontSizeToFitWidth = YES;
    tlabel.numberOfLines = 2;
    return tlabel;
}

+ (float)horizontalFormContentPadding {
    return 15.0f;
}

+ (float)formCellHeight {
    return 44.0f;
}

+ (float)verticalFormSpace {
    return 35.0f;
}

+ (float)verticalFormSpaceTight {
    return 10.0f;
}

+ (float)verticalSectionSpace {
    return 30.0f;
}

+ (float)smallIconWidth {
    return 45.0;
}

+ (float)smallIconHeight {
    return 29.0;
}

+ (float)largeIconWidth {
    return 100.0;
}

+ (float)largeIconHeight {
    return 100.0;
}

+ (NSDictionary*)metrics {
    static NSDictionary *sharedMetrics;
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        sharedMetrics = @{@"HORIZONTAL_FORM_PADDING":@([BTUIKAppearance horizontalFormContentPadding]),
                          @"FORM_CELL_HEIGHT":@([BTUIKAppearance formCellHeight]),
                          @"VERTICAL_FORM_SPACE":@([BTUIKAppearance verticalFormSpace]),
                          @"VERTICAL_FORM_SPACE_TIGHT":@([BTUIKAppearance verticalFormSpaceTight]),
                          @"VERTICAL_SECTION_SPACE":@([BTUIKAppearance verticalSectionSpace]),
                          @"ICON_WIDTH":@([BTUIKAppearance smallIconWidth]),
                          @"ICON_HEIGHT":@([BTUIKAppearance smallIconHeight]),
                          @"LARGE_ICON_WIDTH":@([BTUIKAppearance largeIconWidth]),
                          @"LARGE_ICON_HEIGHT":@([BTUIKAppearance largeIconHeight])};
    });
    
    return sharedMetrics;
}

- (UIColor *)navigationBarTitleTextColor {
    return _navigationBarTitleTextColor != nil ? _navigationBarTitleTextColor : _primaryTextColor;
}

@end