//
//  leakCollectionController.m
//  ThePaperBase
//
//  Created by Huixin on 15/8/3.
//  Copyright (c) 2015年 scar1900. All rights reserved.
//

#import "leakCollectionController.h"
#import "leakCollectionViewCell.h"

static NSString* cellId = @"LeakCollectionViewIdentifier";

@interface leakCollectionController()<UICollectionViewDataSource, UICollectionViewDelegate, UICollectionViewDelegateFlowLayout, UIScrollViewDelegate, leakCollectionViewCellDelegate>{
    NSMutableArray *imageList;
}

@property(nonatomic, strong)UICollectionView *collectView;

@end

@implementation leakCollectionController

- (void)viewDidLoad {
    [super viewDidLoad];
    imageList = NSMutableArray.new;
}

- (void)viewWillLayoutSubviews {
    [super viewWillLayoutSubviews];
    self.view.backgroundColor = [UIColor clearColor];
    self.view.clipsToBounds = NO;
    if (!_collectView) {
        [self.view addSubview:self.collectView];
        [self.collectView makeConstraints:^(MASConstraintMaker *make) {
            make.edges.equalTo(self.view);
        }];
    }
}

- (UICollectionView*)collectView {
    if (!_collectView) {
        CGSize itemSize = CGSizeMake(self.view.frame.size.height, self.view.frame.size.height);
        CGFloat space = self.view.frame.size.width/4-itemSize.width;
        UICollectionViewFlowLayout *layout= [[UICollectionViewFlowLayout alloc]init];
        layout.minimumInteritemSpacing = space-1; //bug5302: 4s报料，图片显示间距问题
        layout.itemSize = itemSize;
        layout.sectionInset = UIEdgeInsetsMake(0, space, 0, 0);
        _collectView = [[UICollectionView alloc] initWithFrame:CGRectZero collectionViewLayout:layout];
        [_collectView registerClass:[leakCollectionViewCell class] forCellWithReuseIdentifier:cellId];
        _collectView.delegate = self;
        _collectView.dataSource = self;
        _collectView.allowsSelection = NO;
        _collectView.scrollEnabled = NO;
        _collectView.clipsToBounds = NO;
        _collectView.backgroundColor = [UIColor clearColor];
        _collectView.delaysContentTouches = NO;
    }
    return _collectView;
}

- (NSMutableArray*)getImageList {
    return imageList;
}

- (NSInteger)getNumOfImage {
    if (imageList) {
        return [imageList count];
    }
    return 0;
}

- (void)addImage:(UIImage *)image {
    if (imageList) {
        [imageList addObject:image];
        [self.collectView reloadData];
    }
}

- (void)deleteImage:(leakCollectionViewCell*)cell {
    if (imageList) {
        NSIndexPath *indexPath = [_collectView indexPathForCell:cell];
        [imageList removeObjectAtIndex:indexPath.row];
        [_collectView deleteItemsAtIndexPaths:@[indexPath]];
    }
    if (imageList.count == 0) {
        if ([self.delegate respondsToSelector:@selector(imageAllDeleted)]) {
            [self.delegate imageAllDeleted];
        }
    }
}

#pragma mark - collctionView delegate and datasource
- (NSInteger)numberOfSectionsInCollectionView:(UICollectionView*)collectionView {
    return 1;
}

- (NSInteger)collectionView:(UICollectionView*)collectionView numberOfItemsInSection:(NSInteger)section {
    if (imageList) {
        return imageList.count;
    }else return 0;
}

- (UICollectionViewCell*)collectionView:(UICollectionView*)collectionView cellForItemAtIndexPath:(NSIndexPath*)indexPath {
    leakCollectionViewCell *cell = (leakCollectionViewCell*)[collectionView dequeueReusableCellWithReuseIdentifier:cellId forIndexPath:indexPath];
    
    if (imageList && imageList.count>0) {
        UIImage *img = imageList[indexPath.row];
        [cell setImage:img];
        cell.delegate = self;
        cell.hidden = NO;
    }
    return cell;
}
@end