#import "HGPersonalCenterExtend.h"

@interface HGPersonalCenterViewController () <UITableViewDelegate, UITableViewDataSource, UIGestureRecognizerDelegate, HGSegmentedPageViewControllerDelegate, HGPageViewControllerDelegate>
@property (nonatomic, strong) HGCenterBaseTableView *tableView;
@property (nonatomic, strong) HGPersonalCenterHeaderView *headerView;
@property (nonatomic, strong) UIView *footerView;
@property (nonatomic, strong) HGSegmentedPageViewController *segmentedPageViewController;
@property (nonatomic) BOOL cannotScroll;

@end

#pragma mark - Life Cycles
- (void)viewDidLoad {
    [super viewDidLoad];
    if (@available(iOS 11.0, *)) {
        [[UIScrollView appearance] setContentInsetAdjustmentBehavior:UIScrollViewContentInsetAdjustmentNever];
    } else {
        self.automaticallyAdjustsScrollViewInsets = NO;
    }
    //解决pop手势中断后tableView偏移问题
    self.extendedLayoutIncludesOpaqueBars = YES;

    [self setupSubViews];
    //可以在请求数据成功后设置/改变pageViewControllers, 但是要保证titles.count=pageViewControllers.count
    [self setupPageViewControllers];
}

#pragma mark - Private Methods
- (void)setupSubViews {
    [self.view addSubview:self.tableView];
    [self addChildViewController:self.segmentedPageViewController];
    [self.footerView addSubview:self.segmentedPageViewController.view];
    [self.segmentedPageViewController didMoveToParentViewController:self];
    
    [self.tableView mas_makeConstraints:^(MASConstraintMaker *make) {
        make.edges.equalTo(self.view);
    }];
    [self.segmentedPageViewController.view mas_makeConstraints:^(MASConstraintMaker *make) {
        make.edges.equalTo(self.footerView);
    }];
}

/**设置segmentedPageViewController的pageViewControllers和categoryView
* 这里可以对categoryView进行自定义，包括分布方式(左、中、右)、高度、背景颜色、字体颜色、字体大小、下划线高度和颜色等
* 这里用到的pageViewController需要继承自HGPageViewController
*/
- (void)setupPageViewControllers {
    NSMutableArray *controllers = [NSMutableArray array];
    NSArray *titles = @[@"主页", @"动态", @"关注", @"粉丝"];
    for (int i = 0; i < titles.count; i++) {
        HGPageViewController *controller;
        if (i % 3 == 0) {
            controller = [[HGThirdViewController alloc] init];
        } else if (i % 2 == 0) {
            controller = [[HGSecondViewController alloc] init];
        } else {
            controller = [[HGFirstViewController alloc] init];
        }
        controller.delegate = self;
        [controllers addObject:controller];
    }
    _segmentedPageViewController.pageViewControllers = controllers;
    _segmentedPageViewController.categoryView.titles = titles;
    _segmentedPageViewController.categoryView.alignment = HGCategoryViewAlignmentLeft;
    _segmentedPageViewController.categoryView.originalIndex = self.selectedIndex;
    _segmentedPageViewController.categoryView.itemSpacing = 25;
    _segmentedPageViewController.categoryView.backgroundColor = [UIColor yellowColor];
}

#pragma mark - UIScrollViewDelegate
- (BOOL)scrollViewShouldScrollToTop:(UIScrollView *)scrollView {
    [self.segmentedPageViewController makePageViewControllerScrollToTop];
    return YES;
}

/**
* 处理联动，Example里有详细注释
*/
- (void)scrollViewDidScroll:(UIScrollView *)scrollView {
    CGFloat contentOffsetY = scrollView.contentOffset.y;
    CGFloat criticalPointOffsetY = scrollView.contentSize.height - SCREEN_HEIGHT;
    if (contentOffsetY - criticalPointOffsetY >= FLT_EPSILON) {
        self.cannotScroll = YES;
        scrollView.contentOffset = CGPointMake(0, criticalPointOffsetY);
        [self.segmentedPageViewController makePageViewControllersScrollState:YES];
    } else {
        if (self.cannotScroll) {
            scrollView.contentOffset = CGPointMake(0, criticalPointOffsetY);
        }
    }
}

#pragma mark - HGSegmentedPageViewControllerDelegate
- (void)segmentedPageViewControllerWillBeginDragging {
    self.tableView.scrollEnabled = NO;
}

- (void)segmentedPageViewControllerDidEndDragging {
    self.tableView.scrollEnabled = YES;
}

#pragma mark - HGPageViewControllerDelegate
- (void)pageViewControllerLeaveTop {
    [self.segmentedPageViewController makePageViewControllersScrollToTop];
    self.cannotScroll = NO;
}

#pragma mark - Getters
- (UITableView *)tableView {
    if (!_tableView) {
        _tableView = [[HGCenterBaseTableView alloc] initWithFrame:CGRectZero style:UITableViewStyleGrouped];
        _tableView.delegate = self;
        _tableView.dataSource = self;
        _tableView.tableHeaderView = self.headerView;
        _tableView.tableFooterView = self.footerView;
        _tableView.separatorStyle = UITableViewCellSeparatorStyleNone;
        _tableView.showsVerticalScrollIndicator = NO;
        [_tableView registerNib:[UINib nibWithNibName:NSStringFromClass([HGDoraemonCell class]) bundle:nil] forCellReuseIdentifier:NSStringFromClass([HGDoraemonCell class])];
    }
    return _tableView;
}

- (HGPersonalCenterHeaderView *)headerView {
    if (!_headerView) {
        _headerView = [[HGPersonalCenterHeaderView alloc] initWithFrame:CGRectMake(0, 0, SCREEN_WIDTH, headerViewHeight)];
    }
    return _headerView;
}

- (UIView *)footerView {
    if (!_footerView) {
        _footerView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, SCREEN_WIDTH, SCREEN_HEIGHT - TOP_BAR_HEIGHT)];
    }
    return _footerView;
}

- (HGSegmentedPageViewController *)segmentedPageViewController {
    if (!_segmentedPageViewController) {
        _segmentedPageViewController = [[HGSegmentedPageViewController alloc] init];
        _segmentedPageViewController.delegate = self;
    }
    return _segmentedPageViewController;
}

//解决categoryView在吸顶状态下，且collectionView的显示内容不满屏时，出现竖直方向滑动失效的问题
_collectionView.alwaysBounceVertical = YES;