//
//  KWMCollectionRefreshUtil.m
//  iCemarose
//
//  Created by HouWeiBin on 2017/6/16.
//  Copyright © 2017年 kollway. All rights reserved.
//

#import "KWMCollectionRefreshUtil.h"
#import "KWMLoadingHeader.h"
#import "MJRefresh.h"
#import "KWMStringUtil.h"
#import "UIColor+SAMAdditions.h"


@interface KWMCollectionRefreshUtil()

@end

@implementation KWMCollectionRefreshUtil

-(NSMutableArray *)dataList{
    if(!_dataList){
        _dataList = [NSMutableArray new];
    }
    if (_dataList.count > 0) {
        if (self.dataFilter) {
            NSMutableArray *filted = [NSMutableArray new];
            for (id data in _dataList) {
                if (self.dataFilter(data)) {
                    [filted addObject:data];
                }
            }
            return filted;
        }
    }
    return _dataList;
}

- (BOOL)isLoading {
    return [self.collectionView.mj_header isRefreshing] || [self.collectionView.mj_footer isRefreshing];
}

- (void)hideLoading {
    [self.collectionView.mj_header endRefreshing];
    [self.collectionView.mj_footer endRefreshing];
};

//隐藏上啦下啦刷新
-(void)setRefreshNull{
    [self.collectionView setMj_header:nil];
    [self.collectionView setMj_footer:nil];
}


- (void)appendDataList:(NSArray *)result {
    
    if (self.page == 1) {
        [self.dataList removeAllObjects];
    }
    if (result) {
        [self.dataList addObjectsFromArray:result];
    }
    [self.collectionView reloadData];
    BOOL hide = self.dataList.count > 0;
    self.emptyView.hidden = hide;
    
    self.lastResult = [NSMutableArray arrayWithArray:result];
}

- (UIView *)emptyView {
    if (_emptyView == nil) {
        UIView *emptyView = [[UIView alloc] init];
        emptyView.backgroundColor = [UIColor clearColor];
        
        emptyView.frame = CGRectMake(0, 0, CGRectGetWidth(self.collectionView.frame), CGRectGetHeight(self.collectionView.frame) );
        
        NSString *msg = @"暂时没有数据";
        if (![KWMStringUtil isEmpty:self.emptyMsg]) {
            msg = self.emptyMsg;
        }
        if(self.isShowEmptyImage){
            emptyView.backgroundColor = [UIColor whiteColor];
            UIView *childView = [self getHasImageView:emptyView setTips:msg];
            [emptyView addSubview:childView];
        }else{
            CGFloat labelHeight = 25;
            NSInteger labelY =  CGRectGetHeight(emptyView.frame)/2 - labelHeight;
            UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(0, labelY, CGRectGetWidth(emptyView.frame), labelHeight)];
            label.textAlignment = NSTextAlignmentCenter;
            label.textColor = [UIColor darkGrayColor];
            label.font = [UIFont systemFontOfSize:14.0f];
            label.text = msg;
            [emptyView addSubview:label];
        }
        
        [self.collectionView addSubview:emptyView];
        [self.collectionView bringSubviewToFront:emptyView];
        _emptyView = emptyView;
    }
    return _emptyView;
}


//有图片的提示view
-(UIView *)getHasImageView:(UIView *)emptyView setTips:(NSString *)tips{
    
    NSInteger childViewY =  CGRectGetHeight(emptyView.frame)/2-130;//130是空view高度的一半
    NSInteger childViewX = CGRectGetWidth(emptyView.frame)/2-100;//100是空view宽度的一半
    
    UIView *childView = [[UIView alloc] initWithFrame:CGRectMake(childViewX, childViewY, 200, 260)];
    childView.backgroundColor = [UIColor clearColor];
    UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(70, 100, 60, 60)];//70是空view的宽减去image的宽除2（100也是同理）
    imageView.clipsToBounds = YES;
    [imageView setImage:[UIImage imageNamed:self.imageName]];
    imageView.contentMode = UIViewContentModeScaleAspectFit;
    [childView addSubview:imageView];
    UILabel *lbFirst = [[UILabel alloc] initWithFrame:CGRectMake(0, 170,200, 20)];
    lbFirst.textAlignment = NSTextAlignmentCenter;
    lbFirst.textColor = [UIColor sam_colorWithHex:@"EAECEE"];
    lbFirst.font = [UIFont systemFontOfSize:14.0f];
    lbFirst.text = tips;
    [childView addSubview:lbFirst];
    return childView;
}


-(BOOL)isReload{
    return self.page == 1;
}

-(void)setHasNextPage:(BOOL)hasNextPage{
    _hasNextPage = hasNextPage;
    self.collectionView.mj_footer.hidden = !hasNextPage;
}

-(void)setCollectionView:(UICollectionView *)collectionView{
    _collectionView = collectionView;
    if (!self.hideHeader || !collectionView.mj_header) {
        collectionView.mj_header = [self createHeader];
    }
    if (collectionView.mj_footer == nil) {
        collectionView.mj_footer = [self createFooter];
    }
}

-(MJRefreshHeader *)createHeader{
    __weak KWMCollectionRefreshUtil *weakSelf = self;
    KWMLoadingHeader *header = [KWMLoadingHeader headerWithRefreshingBlock:^{
        dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(2.0 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
            [weakSelf reLoadData];
        });
    }];
    return header;
}


- (MJRefreshAutoNormalFooter *)createFooter {
    __weak KWMCollectionRefreshUtil *weakSelf = self;
    
    MJRefreshAutoNormalFooter *footer = [MJRefreshAutoNormalFooter footerWithRefreshingBlock:^{
        dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(2.0 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
            [weakSelf loadData];
        });
    }];
    footer.hidden = YES;
    return footer;
}

- (void)reLoadData {
//    self.page = 0;
//    [self loadData];
    [self.delegate refreshUtil:self onLoad:0];
}

-(void)clearData{
    self.lastResult = nil;
    [self.dataList removeAllObjects];
    [self.collectionView reloadData];
}

- (void)loadData {
    [self.delegate refreshUtil:self onLoad:1];
}




@end