//
//  KBItemListViewController.m
//  YouHuiProject
//
//  Created by 小花 on 2018/1/26.
//  Copyright © 2018年 kuxuan. All rights reserved.
//

#import "KBItemListViewController.h"
#import "KBGoodCollectionCell.h"
#import "KBTypeButtonHeader.h"
#import "KBGoodDetailViewController.h"
#import "KBGoodListViewController.h"

static NSString *cellID = @"KBGoodCollectionCell";

#define KHeaderBarHeight 40

@interface KBItemListViewController ()<UICollectionViewDelegate,UICollectionViewDataSource,YHTypeButtonActionDelegate,UICollectionViewDelegateFlowLayout>
{
    NSInteger _page;
    NSInteger _type;
    BOOL _changeType;
}
@property (nonatomic, strong) UICollectionView *collectionView;
@property (nonatomic, strong) NSMutableArray *goodsArr;
@property (nonatomic, strong) KBTypeButtonHeader *selctionHeader;
@end

@implementation KBItemListViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    
    [self configParam];
    [self configNavigationBar];
    [self configCollectionView];
    [self loadCategoryGoodsList];
}

- (void)configParam {
    _page = 1;
    _type = 1; //默认请求推荐的数据
}

- (void)configNavigationBar {
    self.view.backgroundColor = [UIColor whiteColor];
    [self.navigationBar setNavTitle:self.model.name];
    
    UIButton *leftBtn = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, 40, 40)];
    [leftBtn setImage:[UIImage imageNamed:@"back"] forState:UIControlStateNormal];
    [leftBtn addTarget:self action:@selector(backAction) forControlEvents:UIControlEventTouchUpInside];
    [self.navigationBar setCustomLeftButtons:@[leftBtn]];
    [self.navigationBar setShowNavigationBarBottomLine:YES];
}

- (void)configCollectionView {
    
    self.selctionHeader = [[KBTypeButtonHeader alloc] initWithFrame:CGRectMake(0, NavBarHeight, SCREEN_WIDTH, KHeaderBarHeight)];
    self.selctionHeader.backgroundColor = [UIColor whiteColor];
    [self.selctionHeader setTypeButtonTitles:@[@"推荐",@"最新",@"销量"] withDownLableHeight:0 andDeleagte:self];
    [self.selctionHeader setTypeButtonNormalColor:[UIColor YHColorWithHex:0x666666] andSelectColor:[UIColor YHColorWithHex:0xff2420]];
    [self.view addSubview:self.selctionHeader];
    
    
    UICollectionViewFlowLayout *flowLayout = [[UICollectionViewFlowLayout alloc]init];
    CGFloat width = (SCREEN_WIDTH-5)/2;
    CGFloat height = width + 102;
    flowLayout.itemSize = CGSizeMake(width, height);
    flowLayout.minimumLineSpacing = 5;
    flowLayout.minimumInteritemSpacing = 0;
    flowLayout.headerReferenceSize = CGSizeMake(0, 0);
    self.collectionView = [[UICollectionView alloc]initWithFrame:CGRectMake(0, NavBarHeight+KHeaderBarHeight, SCREEN_WIDTH, SCREEN_HEIGHT-NavBarHeight) collectionViewLayout:flowLayout];
    [self.collectionView registerClass:[KBGoodCollectionCell class] forCellWithReuseIdentifier:cellID];
    self.collectionView.backgroundColor = [UIColor YHColorWithHex:0xf6f6f6];
    self.collectionView.showsVerticalScrollIndicator = NO;
    self.collectionView.delegate = self;
    self.collectionView.dataSource = self;
    self.collectionView.mj_footer = [MJRefreshBackNormalFooter footerWithRefreshingBlock:^{
        [self loadMoreData];
    }];
    [self.view addSubview: self.collectionView];
   
}

- (void)backAction {
    [self.navigationController popViewControllerAnimated:YES];
}


/**
 上拉加载
 */
- (void)loadMoreData {
    _page++;
    _changeType = NO;
    [self loadCategoryGoodsList];
}


/**
 加载下部商品列表
 */
- (void)loadCategoryGoodsList {
    NSDictionary *para = @{@"page":@(_page),@"scid":self.model.Id,@"type":@(_type)};
    [KBHttp post:CategoryGoods params:para success:^(id json) {
        if (_changeType) {
            [self.goodsArr removeAllObjects];
        }
        NSArray *list = [NSArray yy_modelArrayWithClass:[KBChildGoodModel class] json:json[@"data"]];
        [self.goodsArr addObjectsFromArray:list];
        [self.collectionView reloadData];
        [self noMoreDataWithArray:list];
        [self.collectionView.mj_footer endRefreshing];
    } failure:^(NSError *error) {
        [self.collectionView.mj_footer endRefreshing];
    }];
}

- (void)noMoreDataWithArray:(NSArray *)array {
    if (array.count <= 0) {
        MJRefreshBackNormalFooter *foot = (MJRefreshBackNormalFooter *)self.collectionView.mj_footer;
        [foot setTitle:@"到底啦" forState:MJRefreshStateIdle];
    }
}


- (void)scrollViewDidScroll:(UIScrollView *)scrollView
{
    //scrollView已经有拖拽手势，直接拿到scrollView的拖拽手势
    UIPanGestureRecognizer *pan = scrollView.panGestureRecognizer;
    //获取到拖拽的速度 >0 向下拖动 <0 向上拖动
    CGFloat velocity = [pan velocityInView:scrollView].y;

    if (velocity <- 10) {
        //向上拖动，隐藏导航栏
        if (self.navigationBar.y == -NavBarHeight) {
            return;
        }
        [UIView animateWithDuration:0.35 animations:^{
            self.navigationBar.y = -NavBarHeight;
            self.selctionHeader.y = KStatusBarHeight;
            self.collectionView.y = KStatusBarHeight + KHeaderBarHeight;
        }];

    }else if (velocity > 10) {
        //向下拖动，显示导航栏
        if (self.navigationBar.y == 0) {
            return;
        }
        [UIView animateWithDuration:0.35 animations:^{
            self.navigationBar.y = 0;
            self.selctionHeader.y = NavBarHeight;
            self.collectionView.y = NavBarHeight + KHeaderBarHeight;
        }];


    }else if(velocity == 0){
        //停止拖拽
    }
}





#pragma mark =============== YHTypeButtonActionDelegate =============

- (void)didClickTypeButtonAction:(UIButton *)button withIndex:(NSInteger)index {
    _type = index + 1;
    _changeType = YES;
    [self loadCategoryGoodsList];
    [self.collectionView setContentOffset:CGPointMake(0, 0) animated:YES];
}


#pragma mark ============ UICollectionView Delegate &&  DataSource ==========
- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section
{
    return self.goodsArr.count;
}

- (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout referenceSizeForHeaderInSection:(NSInteger)section
{
    return CGSizeMake(0, 0);
}

- (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout referenceSizeForFooterInSection:(NSInteger)section
{
    return CGSizeMake(0, 0);
}


- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath
{
    KBGoodCollectionCell *cell = [self.collectionView dequeueReusableCellWithReuseIdentifier:cellID forIndexPath:indexPath];
    KBChildGoodModel *model = self.goodsArr[indexPath.row];
    cell.model = model;
    return cell;
}


- (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath {

    
    KBChildGoodModel *model = self.goodsArr[indexPath.row];
    if ([model.type isEqualToString:@"1"]) {
        //专场
        KBGoodListViewController *list = [[KBGoodListViewController alloc] init];
        list.cate_id = model.goods_id;
        [self.navigationController pushViewController:list animated:YES];
    }else {
        //详情
        KBGoodDetailViewController *detailVC = [[KBGoodDetailViewController alloc] init];
        DetailRequestModel *requestModel = [[DetailRequestModel alloc] initWithChildModel:model];
        detailVC.requestModel = requestModel;
        [self.navigationController pushViewController:detailVC animated:YES];
    }
}




#pragma mark -------------
- (NSMutableArray *)goodsArr {
    if (!_goodsArr) {
        _goodsArr = [NSMutableArray array];
    }
    return _goodsArr;
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

/*
#pragma mark - Navigation

// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
    // Get the new view controller using [segue destinationViewController].
    // Pass the selected object to the new view controller.
}
*/

@end