/*

 Copyright (C) 2017 Apple Inc. All Rights Reserved.

 See LICENSE.txt for this sample’s licensing information

 Abstract:

 The application's main view controller.

 */

#import "RootViewController.h"

#import "LaunchMeAppDelegate.h"

@interface RootViewController () <UITextFieldDelegate>

@property (nonatomic, weak) IBOutlet UISlider *redSlider;

@property (nonatomic, weak) IBOutlet UISlider *greenSlider;

@property (nonatomic, weak) IBOutlet UISlider *blueSlider;

@property (nonatomic, weak) IBOutlet UITextField *urlField;

@property (nonatomic, weak) IBOutlet UIView *colorView;

@property (nonatomic, weak) IBOutlet UITextField *inputTextField;

@end

#pragma mark -

@implementation RootViewController

#pragma mark - View Lifecycle

// -------------------------------------------------------------------------------

//  viewDidLoad

// -------------------------------------------------------------------------------

- (void)viewDidLoad

{

    [super viewDidLoad];

    self.inputTextField.text = NSLocalizedString(@"random text", @"");

    [self updateURLField];

}

#pragma mark - UI Updating

// -------------------------------------------------------------------------------

//  updateURLField:

//

//  Build the URL field in this format:

//      launchme://?color=000000&text=some%20text

// -------------------------------------------------------------------------------

- (void)updateURLField

{

    CGFloat red = 0.0f;

    CGFloat green = 0.0f;

    CGFloat blue = 0.0f;

    CGFloat alpha = 0.0f;

    [self.colorView.backgroundColor getRed:&red green:&green blue:&blue alpha:&alpha];

    NSString *colorText = [NSString stringWithFormat:@"%.2x%.2x%.2x",

                           (unsigned char)(red * 255),

                           (unsigned char)(green * 255),

                           (unsigned char)(blue * 255)];

    // Replace any characters not compatible for a URL

    NSString *dataString = self.inputTextField.text;

    dataString = [dataString stringByAddingPercentEncodingWithAllowedCharacters:[NSCharacterSet URLFragmentAllowedCharacterSet]];

    self.urlField.text = [NSString stringWithFormat:@"launchme://?%@=%@&%@=%@", ColorKey, colorText, TextKey, dataString];

}

// -------------------------------------------------------------------------------

//  updateWithColor:color:

//

//  Update the interface to display aColor.  This includes modifying colorView

//  to show aColor, moving the red, green, and blue sliders to match the R, G, and

//  B components of aColor, and updating urlLabel to display the corresponding

//  URL for aColor.

// -------------------------------------------------------------------------------

- (void)updateWithColor:(UIColor *)aColor

{

    // There is a possibility that -getRed:green:blue:alpha: could fail if aColor

    // is not in a compatible color space.  In such a case, the arguments are not

    // modified.  Having default values will allow for a more graceful failure

    // than picking up whatever is currently on the stack.

    CGFloat red = 0.0f;

    CGFloat green = 0.0f;

    CGFloat blue = 0.0f;

    CGFloat alpha = 0.0f;

    if ([aColor getRed:&red green:&green blue:&blue alpha:&alpha] == NO)

    {

        // While setting default values for red, green, blue and alpha guards against

        // undefined results if -getRed:green:blue:alpha: fails, aColor will be assigned

        // as the backgroundColor of colorView a few lines down.

        // Initialize aColor to the black color so it matches the color code that will

        // be displayed in the urlLabel.

        //

        aColor = [UIColor blackColor];

    }

    self.redSlider.value = red;

    self.greenSlider.value = green;

    self.blueSlider.value = blue;

    self.colorView.backgroundColor = aColor;

    [self updateURLField];

}

#pragma mark - UITextFieldDelegate

- (BOOL)textFieldShouldReturn:(UITextField *)textField

{

    [self updateURLField];

    [self.inputTextField resignFirstResponder];

    return YES;

}

#pragma mark - Actions

// -------------------------------------------------------------------------------

//  sliderValueDidChange:

//

//  IBAction for all three sliders.

// -------------------------------------------------------------------------------

- (IBAction)sliderValueDidChange:(id)sender

{

    [self updateURLField];

    [self updateWithColor:[UIColor colorWithRed:self.redSlider.value

                                          green:self.greenSlider.value

                                           blue:self.blueSlider.value

                                          alpha:1.0f]];

}

// -------------------------------------------------------------------------------

//  startMobileSafari:

//

//  IBAction for the Launch Mobile Safari button.

// -------------------------------------------------------------------------------

- (IBAction)startMobileSafari:(id)sender

{

    UIPasteboard *pasteboard = [UIPasteboard generalPasteboard];

    pasteboard.string = self.urlField.text;

    [[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"http://www.apple.com"]

                                       options:@{}

                             completionHandler:^(BOOL success) {

        // Mobile Safari was opened.

    }];

}

@end