//
//  LATypingDemoViewController.m
//  LottieExamples
//
//  Created by Brandon Withrow on 1/9/17.
//  Copyright © 2017 Brandon Withrow. All rights reserved.
//

#import "TypingDemoViewController.h"
#import "AnimatedTextField.h"

@interface TypingDemoViewController () <UITextFieldDelegate>

@end

@implementation TypingDemoViewController {
  AnimatedTextField *textField_;
  UITextField *typingField_;
  UISlider *fontSlider_;
  UIButton *closeButton_;
}

- (void)viewDidLoad {
    [super viewDidLoad];
  self.view.backgroundColor = [UIColor whiteColor];
  
  closeButton_ = [UIButton buttonWithType:UIButtonTypeSystem];
  [closeButton_ setTitle:@"Close" forState:UIControlStateNormal];
  [closeButton_ addTarget:self action:@selector(close) forControlEvents:UIControlEventTouchUpInside];
  [self.view addSubview:closeButton_];
  
  textField_ = [[AnimatedTextField alloc] initWithFrame:self.view.bounds];
  [self.view addSubview:textField_];
  [textField_ setText:@"Start Typing"];
  
  typingField_ = [[UITextField alloc] initWithFrame:CGRectZero];
  typingField_.alpha = 0;
  typingField_.text = textField_.text;
  typingField_.delegate = self;
  [self.view addSubview:typingField_];
  [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardChanged:) name:UIKeyboardWillShowNotification object:NULL];
  [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardChanged:) name:UIKeyboardWillHideNotification object:NULL];
  
  fontSlider_ = [[UISlider alloc] initWithFrame:CGRectZero];
  fontSlider_.minimumValue = 18;
  fontSlider_.maximumValue = 128;
  fontSlider_.value = 36;
  [fontSlider_ addTarget:self action:@selector(sliderUpdated) forControlEvents:UIControlEventValueChanged];
  [self.view addSubview:fontSlider_];
}

- (void)viewDidAppear:(BOOL)animated {
  [super viewDidAppear:animated];
  [typingField_ becomeFirstResponder];
}

- (void)viewDidLayoutSubviews {
  [super viewDidLayoutSubviews];
  CGSize buttonSize = [closeButton_ sizeThatFits:self.view.bounds.size];
  closeButton_.frame = CGRectMake(10, 30, buttonSize.width, 50);
  fontSlider_.frame = CGRectMake(10, CGRectGetMaxY(closeButton_.frame), self.view.bounds.size.width - 20, 44);
  textField_.frame = CGRectMake(0, CGRectGetMaxY(fontSlider_.frame), self.view.bounds.size.width, self.view.bounds.size.height - CGRectGetMaxY(fontSlider_.frame));
  typingField_.frame = CGRectMake(0, -100, self.view.bounds.size.width, 25);
}

- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string {
  [textField_ changeCharactersInRange:range toString:string];
  return YES;
}

- (void)keyboardChanged:(NSNotification *)notif {
  NSDictionary *userInfo = notif.userInfo;
  NSValue *keyboardFrame = userInfo[UIKeyboardFrameEndUserInfoKey];
  [textField_ setScrollInsets:UIEdgeInsetsMake(0, 0, keyboardFrame.CGRectValue.size.height, 0)];
}

- (void)sliderUpdated {
  textField_.fontSize = fontSlider_.value;
}

- (void)close {
  [typingField_ resignFirstResponder];
  [self.presentingViewController dismissViewControllerAnimated:YES completion:NULL];
}
@end