/*
 Copyright 2017-present the Material Components for iOS authors. All Rights Reserved.

 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
 You may obtain a copy of the License at

 http://www.apache.org/licenses/LICENSE-2.0

 Unless required by applicable law or agreed to in writing, software
 distributed under the License is distributed on an "AS IS" BASIS,
 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
 limitations under the License.
 */

#import "MaterialTextFields.h"

@interface MultilineTextFieldLegacyExample : UIViewController <UITextViewDelegate>

// Be sure to keep your controllers in memory somewhere like a property:
@property(nonatomic, strong) MDCTextInputControllerLegacyDefault *textFieldControllerDefaultCharMax;
@property(nonatomic, strong) MDCTextInputControllerLegacyDefault *textFieldControllerFloating;
@property(nonatomic, strong) MDCTextInputControllerLegacyFullWidth *textFieldControllerFullWidth;
@property(nonatomic, strong) UIScrollView *scrollView;

@end

@implementation MultilineTextFieldLegacyExample

- (void)dealloc {
  [[NSNotificationCenter defaultCenter] removeObserver:self];
}

- (void)viewDidLoad {
  [super viewDidLoad];
  self.view.backgroundColor = [UIColor colorWithWhite:0.97f alpha:1.0f];

  self.title = @"Legacy Multi-line Styles";

  self.scrollView = [[UIScrollView alloc] initWithFrame:CGRectZero];
  [self.view addSubview:self.scrollView];
  self.scrollView.translatesAutoresizingMaskIntoConstraints = NO;

  UIEdgeInsets margins = UIEdgeInsetsMake(0, 16, 0, 16);
  self.scrollView.layoutMargins = margins;

  [NSLayoutConstraint
      activateConstraints:[NSLayoutConstraint
                              constraintsWithVisualFormat:@"V:|[scrollView]|"
                                                  options:0
                                                  metrics:nil
                                                    views:@{
                                                      @"scrollView" : self.scrollView
                                                    }]];
  [NSLayoutConstraint
      activateConstraints:[NSLayoutConstraint
                              constraintsWithVisualFormat:@"H:|[scrollView]|"
                                                  options:0
                                                  metrics:nil
                                                    views:@{
                                                      @"scrollView" : self.scrollView
                                                    }]];

  MDCMultilineTextField *multilineTextFieldUnstyled = [[MDCMultilineTextField alloc] init];
  [self.scrollView addSubview:multilineTextFieldUnstyled];
  multilineTextFieldUnstyled.translatesAutoresizingMaskIntoConstraints = NO;

  multilineTextFieldUnstyled.placeholder = @"No Controller (unstyled)";
  multilineTextFieldUnstyled.textView.delegate = self;
  multilineTextFieldUnstyled.leadingUnderlineLabel.text = @"Leading";
  multilineTextFieldUnstyled.trailingUnderlineLabel.text = @"Trailing";

  MDCMultilineTextField *multilineTextFieldUnstyledArea = [[MDCMultilineTextField alloc] init];
  [self.scrollView addSubview:multilineTextFieldUnstyledArea];
  multilineTextFieldUnstyledArea.translatesAutoresizingMaskIntoConstraints = NO;

  multilineTextFieldUnstyledArea.placeholder = @"No Controller (unstyled) minimum of 3 lines";
  multilineTextFieldUnstyledArea.textView.delegate = self;
  multilineTextFieldUnstyledArea.leadingUnderlineLabel.text = @"Leading";
  multilineTextFieldUnstyledArea.trailingUnderlineLabel.text = @"Trailing";
  multilineTextFieldUnstyledArea.minimumLines = 3;
  multilineTextFieldUnstyledArea.expandsOnOverflow = NO;

  MDCMultilineTextField *multilineTextFieldFloating = [[MDCMultilineTextField alloc] init];
  [self.scrollView addSubview:multilineTextFieldFloating];
  multilineTextFieldFloating.translatesAutoresizingMaskIntoConstraints = NO;

  multilineTextFieldFloating.textView.delegate = self;

  self.textFieldControllerFloating =
      [[MDCTextInputControllerLegacyDefault alloc] initWithTextInput:multilineTextFieldFloating];
  self.textFieldControllerFloating.placeholderText = @"Floating Controller";

  MDCMultilineTextField *multilineTextFieldCharMaxDefault = [[MDCMultilineTextField alloc] init];
  [self.scrollView addSubview:multilineTextFieldCharMaxDefault];
  multilineTextFieldCharMaxDefault.translatesAutoresizingMaskIntoConstraints = NO;

  multilineTextFieldCharMaxDefault.textView.delegate = self;

  self.textFieldControllerDefaultCharMax = [[MDCTextInputControllerLegacyDefault alloc]
      initWithTextInput:multilineTextFieldCharMaxDefault];
  self.textFieldControllerDefaultCharMax.characterCountMax = 30;
  self.textFieldControllerDefaultCharMax.floatingEnabled = NO;
  self.textFieldControllerDefaultCharMax.placeholderText = @"Inline Placeholder Only";

  MDCMultilineTextField *multilineTextFieldCharMaxFullWidth = [[MDCMultilineTextField alloc] init];
  [self.scrollView addSubview:multilineTextFieldCharMaxFullWidth];
  multilineTextFieldCharMaxFullWidth.translatesAutoresizingMaskIntoConstraints = NO;

  multilineTextFieldCharMaxFullWidth.textView.delegate = self;

  self.textFieldControllerFullWidth = [[MDCTextInputControllerLegacyFullWidth alloc]
      initWithTextInput:multilineTextFieldCharMaxFullWidth];
  self.textFieldControllerFullWidth.characterCountMax = 140;
  self.textFieldControllerFullWidth.placeholderText = @"Full Width Controller";

  [NSLayoutConstraint
      activateConstraints:
          [NSLayoutConstraint
              constraintsWithVisualFormat:@"V:[unstyled]-[area]-[floating]-[charMax]-[fullWidth]"
                                  options:0
                                  metrics:nil
                                    views:@{
                                      @"unstyled" : multilineTextFieldUnstyled,
                                      @"area" : multilineTextFieldUnstyledArea,
                                      @"charMax" : multilineTextFieldCharMaxDefault,
                                      @"floating" : multilineTextFieldFloating,
                                      @"fullWidth" : multilineTextFieldCharMaxFullWidth
                                    }]];
  [NSLayoutConstraint
      activateConstraints:[NSLayoutConstraint
                              constraintsWithVisualFormat:@"H:|-[unstyled]-|"
                                                  options:0
                                                  metrics:nil
                                                    views:@{
                                                      @"unstyled" : multilineTextFieldUnstyled
                                                    }]];
  [NSLayoutConstraint
      activateConstraints:[NSLayoutConstraint
                              constraintsWithVisualFormat:@"H:|-[area]-|"
                                                  options:0
                                                  metrics:nil
                                                    views:@{
                                                      @"area" : multilineTextFieldUnstyledArea
                                                    }]];
  [NSLayoutConstraint
      activateConstraints:[NSLayoutConstraint
                              constraintsWithVisualFormat:@"H:|-[floating]-|"
                                                  options:0
                                                  metrics:nil
                                                    views:@{
                                                      @"floating" : multilineTextFieldFloating
                                                    }]];
  [NSLayoutConstraint
      activateConstraints:[NSLayoutConstraint
                              constraintsWithVisualFormat:@"H:|-[charMax]-|"
                                                  options:0
                                                  metrics:nil
                                                    views:@{
                                                      @"charMax" : multilineTextFieldCharMaxDefault
                                                    }]];

#if defined(__IPHONE_11_0) && (__IPHONE_OS_VERSION_MAX_ALLOWED >= __IPHONE_11_0)
  if (@available(iOS 11.0, *)) {
    [NSLayoutConstraint activateConstraints:@[
      [NSLayoutConstraint constraintWithItem:multilineTextFieldUnstyled
                                   attribute:NSLayoutAttributeTop
                                   relatedBy:NSLayoutRelationEqual
                                      toItem:self.scrollView.contentLayoutGuide
                                   attribute:NSLayoutAttributeTop
                                  multiplier:1
                                    constant:20],
      [NSLayoutConstraint constraintWithItem:multilineTextFieldCharMaxFullWidth
                                   attribute:NSLayoutAttributeBottom
                                   relatedBy:NSLayoutRelationEqual
                                      toItem:self.scrollView.contentLayoutGuide
                                   attribute:NSLayoutAttributeBottomMargin
                                  multiplier:1
                                    constant:-20]
    ]];
  } else {
    [NSLayoutConstraint activateConstraints:@[
      [NSLayoutConstraint constraintWithItem:multilineTextFieldUnstyled
                                   attribute:NSLayoutAttributeTop
                                   relatedBy:NSLayoutRelationEqual
                                      toItem:self.scrollView
                                   attribute:NSLayoutAttributeTop
                                  multiplier:1
                                    constant:20],
      [NSLayoutConstraint constraintWithItem:multilineTextFieldCharMaxFullWidth
                                   attribute:NSLayoutAttributeBottom
                                   relatedBy:NSLayoutRelationEqual
                                      toItem:self.scrollView
                                   attribute:NSLayoutAttributeBottomMargin
                                  multiplier:1
                                    constant:-20]
    ]];
  }
#else
  [NSLayoutConstraint activateConstraints:@[
    [NSLayoutConstraint constraintWithItem:multilineTextFieldUnstyled
                                 attribute:NSLayoutAttributeTop
                                 relatedBy:NSLayoutRelationEqual
                                    toItem:self.scrollView
                                 attribute:NSLayoutAttributeTop
                                multiplier:1
                                  constant:20],
    [NSLayoutConstraint constraintWithItem:multilineTextFieldCharMaxFullWidth
                                 attribute:NSLayoutAttributeBottom
                                 relatedBy:NSLayoutRelationEqual
                                    toItem:self.scrollView
                                 attribute:NSLayoutAttributeBottomMargin
                                multiplier:1
                                  constant:-20]
  ]];
#endif

  [NSLayoutConstraint constraintWithItem:multilineTextFieldCharMaxFullWidth
                               attribute:NSLayoutAttributeLeading
                               relatedBy:NSLayoutRelationEqual
                                  toItem:self.view
                               attribute:NSLayoutAttributeLeading
                              multiplier:1
                                constant:0]
      .active = YES;
  [NSLayoutConstraint constraintWithItem:multilineTextFieldCharMaxFullWidth
                               attribute:NSLayoutAttributeTrailing
                               relatedBy:NSLayoutRelationEqual
                                  toItem:self.view
                               attribute:NSLayoutAttributeTrailing
                              multiplier:1
                                constant:0]
      .active = YES;
  [NSLayoutConstraint
      activateConstraints:[NSLayoutConstraint
                              constraintsWithVisualFormat:@"H:|[fullWidth]|"
                                                  options:0
                                                  metrics:nil
                                                    views:@{
                                                      @"fullWidth" :
                                                          multilineTextFieldCharMaxFullWidth
                                                    }]];

  UITapGestureRecognizer *tapRecognizer =
      [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapDidTouch)];
  [self.view addGestureRecognizer:tapRecognizer];

  [self registerKeyboardNotifications];
}

- (void)tapDidTouch {
  [self.view endEditing:YES];
}

#pragma mark - CatalogByConvention

+ (NSArray *)catalogBreadcrumbs {
  return @[ @"Text Field", @"[Legacy] Multi-line" ];
}

+ (BOOL)catalogIsPrimaryDemo {
  return NO;
}

+ (BOOL)catalogIsPresentable {
  return NO;
}

#pragma mark - Keyboard Handling

- (void)registerKeyboardNotifications {
  NSNotificationCenter *defaultCenter = [NSNotificationCenter defaultCenter];
  [defaultCenter addObserver:self
                    selector:@selector(keyboardWillShow:)
                        name:UIKeyboardWillShowNotification
                      object:nil];
  [defaultCenter addObserver:self
                    selector:@selector(keyboardWillShow:)
                        name:UIKeyboardDidChangeFrameNotification
                      object:nil];
  [defaultCenter addObserver:self
                    selector:@selector(keyboardWillHide:)
                        name:UIKeyboardWillHideNotification
                      object:nil];
}

- (void)keyboardWillShow:(NSNotification *)notification {
  CGRect frame = [[notification.userInfo valueForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue];
  self.scrollView.contentInset = UIEdgeInsetsMake(0, 0, CGRectGetHeight(frame), 0);
}

- (void)keyboardWillHide:(NSNotification *)notification {
  self.scrollView.contentInset = UIEdgeInsetsMake(0, 0, 0, 0);
}

@end

@implementation MultilineTextFieldLegacyExample (UITextViewDelegate)

- (void)textViewDidChange:(UITextView *)textView {
  NSLog(@"%@", textView.text);
}

@end