/*
 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"

#import <UIKit/UIKit.h>

@interface TextFieldStatesViewController : UIViewController

@property(nonatomic) Class selectedClass;
@property(nonatomic) NSArray<Class> *classes;

@property(nonatomic) id<MDCTextInputController> enabledController;
@property(nonatomic) MDCTextField *enabled;

@property(nonatomic) id<MDCTextInputController> disabledController;
@property(nonatomic) MDCTextField *disabled;

@property(nonatomic) id<MDCTextInputController> erroredController;
@property(nonatomic) MDCTextField *errored;

@property(nonatomic) id<MDCTextInputController> erroredDisabledController;
@property(nonatomic) MDCTextField *erroredDisabled;

@property(nonatomic) UIScrollView *scrollView;

@end

@implementation TextFieldStatesViewController

- (void)viewDidLoad {
  [super viewDidLoad];

  self.title = @"Text Field States";
  [self setupScrollView];

  self.enabled = [[MDCTextField alloc] initWithFrame:CGRectZero];
  self.enabled.translatesAutoresizingMaskIntoConstraints = NO;
  [self.scrollView addSubview:self.enabled];

  self.disabled = [[MDCTextField alloc] initWithFrame:CGRectZero];
  self.disabled.translatesAutoresizingMaskIntoConstraints = NO;
  [self.scrollView addSubview:self.disabled];
  self.disabled.enabled = NO;

  self.errored = [[MDCTextField alloc] initWithFrame:CGRectZero];
  self.errored.translatesAutoresizingMaskIntoConstraints = NO;
  [self.scrollView addSubview:self.errored];

  self.erroredDisabled = [[MDCTextField alloc] initWithFrame:CGRectZero];
  self.erroredDisabled.translatesAutoresizingMaskIntoConstraints = NO;
  [self.scrollView addSubview:self.erroredDisabled];
  self.erroredDisabled.enabled = NO;

  [self setupControllers];

  UIBarButtonItem *styleButton =
      [[UIBarButtonItem alloc] initWithTitle:@"Style"
                                       style:UIBarButtonItemStylePlain
                                      target:self
                                      action:@selector(styleButtonDidTouch:)];
  self.navigationItem.rightBarButtonItem = styleButton;

  [NSLayoutConstraint constraintWithItem:self.enabled
                               attribute:NSLayoutAttributeLeading
                               relatedBy:NSLayoutRelationEqual
                                  toItem:self.view
                               attribute:NSLayoutAttributeLeadingMargin
                              multiplier:1
                                constant:0]
      .active = YES;
  [NSLayoutConstraint constraintWithItem:self.enabled
                               attribute:NSLayoutAttributeTrailing
                               relatedBy:NSLayoutRelationEqual
                                  toItem:self.view
                               attribute:NSLayoutAttributeTrailingMargin
                              multiplier:1
                                constant:0]
      .active = YES;
  [NSLayoutConstraint constraintWithItem:self.enabled
                               attribute:NSLayoutAttributeTrailing
                               relatedBy:NSLayoutRelationEqual
                                  toItem:self.scrollView
                               attribute:NSLayoutAttributeTrailingMargin
                              multiplier:1
                                constant:0]
      .active = YES;

  NSDictionary *views = @{
    @"enabled" : self.enabled,
    @"disabled" : self.disabled,
    @"errored" : self.errored,
    @"erroredDisabled" : self.erroredDisabled
  };
  [NSLayoutConstraint
      activateConstraints:
          [NSLayoutConstraint
              constraintsWithVisualFormat:@"V:[enabled]-[disabled]-[errored]-[erroredDisabled]"
                                  options:NSLayoutFormatAlignAllLeading |
                                          NSLayoutFormatAlignAllTrailing
                                  metrics:nil
                                    views:views]];

#if defined(__IPHONE_11_0) && (__IPHONE_OS_VERSION_MAX_ALLOWED >= __IPHONE_11_0)
  if (@available(iOS 11.0, *)) {
    [NSLayoutConstraint constraintWithItem:self.enabled
                                 attribute:NSLayoutAttributeTop
                                 relatedBy:NSLayoutRelationEqual
                                    toItem:self.scrollView.contentLayoutGuide
                                 attribute:NSLayoutAttributeTop
                                multiplier:1
                                  constant:20]
        .active = YES;
    [NSLayoutConstraint constraintWithItem:self.erroredDisabled
                                 attribute:NSLayoutAttributeBottom
                                 relatedBy:NSLayoutRelationEqual
                                    toItem:self.scrollView.contentLayoutGuide
                                 attribute:NSLayoutAttributeBottomMargin
                                multiplier:1
                                  constant:-20]
        .active = YES;

  } else {
    [NSLayoutConstraint constraintWithItem:self.enabled
                                 attribute:NSLayoutAttributeTop
                                 relatedBy:NSLayoutRelationEqual
                                    toItem:self.scrollView
                                 attribute:NSLayoutAttributeTop
                                multiplier:1
                                  constant:20]
        .active = YES;
    [NSLayoutConstraint constraintWithItem:self.erroredDisabled
                                 attribute:NSLayoutAttributeBottom
                                 relatedBy:NSLayoutRelationEqual
                                    toItem:self.scrollView
                                 attribute:NSLayoutAttributeBottomMargin
                                multiplier:1
                                  constant:-20]
        .active = YES;
  }
#else
  [NSLayoutConstraint constraintWithItem:self.enabled
                               attribute:NSLayoutAttributeTop
                               relatedBy:NSLayoutRelationEqual
                                  toItem:self.scrollView
                               attribute:NSLayoutAttributeTop
                              multiplier:1
                                constant:20]
      .active = YES;
  [NSLayoutConstraint constraintWithItem:self.erroredDisabled
                               attribute:NSLayoutAttributeBottom
                               relatedBy:NSLayoutRelationEqual
                                  toItem:self.scrollView
                               attribute:NSLayoutAttributeBottomMargin
                              multiplier:1
                                constant:-20]
      .active = YES;
#endif
}

- (void)setupControllers {
  if (!self.classes) {
    // TODO: (larche) When more classes (other than full width) are added, put them in here so they
    // can be showcased.
    self.classes = @[
      [MDCTextInputControllerFilled self], [MDCTextInputControllerOutlined self],
      [MDCTextInputControllerUnderline self]
    ];
    self.selectedClass = self.classes.firstObject;
  }

  if ([self.selectedClass conformsToProtocol:@protocol(MDCTextInputController)]) {
    self.enabledController =
        [(id<MDCTextInputController>)[self.selectedClass alloc] initWithTextInput:self.enabled];
    self.enabledController.placeholderText = @"Enabled";

    self.disabledController =
        [(id<MDCTextInputController>)[self.selectedClass alloc] initWithTextInput:self.disabled];
    self.disabledController.placeholderText = @"Disabled";

    self.erroredController =
        [(id<MDCTextInputController>)[self.selectedClass alloc] initWithTextInput:self.errored];
    self.erroredController.placeholderText = @"Errored";
    [self.erroredController setErrorText:@"Errored" errorAccessibilityValue:nil];

    self.erroredDisabledController = [(id<MDCTextInputController>)[self.selectedClass alloc]
        initWithTextInput:self.erroredDisabled];
    self.erroredDisabledController.placeholderText = @"Errored Disabled";
    [self.erroredDisabledController setErrorText:@"Errored Disabled" errorAccessibilityValue:nil];
  }
}

- (void)setupScrollView {
  self.scrollView = [[UIScrollView alloc] initWithFrame:CGRectZero];
  self.scrollView.translatesAutoresizingMaskIntoConstraints = NO;
  [self.view addSubview:self.scrollView];
  self.scrollView.backgroundColor = UIColor.whiteColor;

  [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
                                                    }]];

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

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

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

- (void)styleButtonDidTouch:(UIBarButtonItem *)sender {
  UIAlertController *alert =
      [UIAlertController alertControllerWithTitle:@"Controller Class"
                                          message:nil
                                   preferredStyle:UIAlertControllerStyleActionSheet];

  __weak TextFieldStatesViewController *weakSelf = self;
  for (Class class in self.classes) {
    NSString *title = NSStringFromClass(class);
    title = [title stringByReplacingOccurrencesOfString:@"MDCTextInputController" withString:@""];
    if ([class isEqual:self.selectedClass]) {
      title = [title stringByAppendingString:@" ✓"];
    }
    UIAlertAction *action =
        [UIAlertAction actionWithTitle:title
                                 style:UIAlertActionStyleDefault
                               handler:^(UIAlertAction *__unused _Nonnull unusedAction) {
                                 weakSelf.selectedClass = class;
                                 [weakSelf setupControllers];
                               }];
    [alert addAction:action];
  }
  [self presentViewController:alert animated:YES completion:nil];
}

@end

@implementation TextFieldStatesViewController (CatalogByConvention)

+ (NSArray *)catalogBreadcrumbs {
  return @[ @"Text Field", @"States (Objective-C)" ];
}

+ (BOOL)catalogIsPrimaryDemo {
  return NO;
}

@end