/*
 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 "supplemental/CollectionsEditingManyCellsExampleSupplemental.h"

static const NSInteger kSectionCount = 25;
static const NSInteger kSectionItemCount = 50;

@implementation CollectionsEditingManyCellsExample

- (void)viewDidLoad {
  [super viewDidLoad];

  // Add button to toggle edit mode.
  [self updatedRightBarButtonItem:NO];

  // Register cell class.
  [self.collectionView registerClass:[MDCCollectionViewTextCell class]
          forCellWithReuseIdentifier:kCollectionsEditingManyCellsCellIdentifierItem];
  // Optional
  // Register section header class
  [self.collectionView registerClass:[MDCCollectionViewTextCell class]
          forSupplementaryViewOfKind:UICollectionElementKindSectionHeader
                 withReuseIdentifier:kCollectionsEditingManyCellsHeaderReuseIdentifier];

  // Populate content.
  self.content = [NSMutableArray array];
  for (NSInteger i = 0; i < kSectionCount; i++) {
    NSMutableArray *items = [NSMutableArray array];
    for (NSInteger j = 0; j < kSectionItemCount; j++) {
      NSString *itemString = [NSString stringWithFormat:@"Section-%02zd Item-%02zd", i, j];
      [items addObject:itemString];
    }
    [self.content addObject:items];
  }

  // Customize collection view settings.
  self.styler.cellStyle = MDCCollectionViewCellStyleCard;
}

- (void)updatedRightBarButtonItem:(BOOL)isEditing {
  self.navigationItem.rightBarButtonItem =
      [[UIBarButtonItem alloc] initWithTitle:isEditing ? @"Cancel" : @"Edit"
                                       style:UIBarButtonItemStyleDone
                                      target:self
                                      action:@selector(toggleEditMode:)];
}

- (void)toggleEditMode:(id)sender {
  BOOL isEditing = self.editor.isEditing;
  [self updatedRightBarButtonItem:!isEditing];
  [self.editor setEditing:!isEditing animated:YES];
}

@end