#import "ScrollMenuView.h"
#import "YXMenuItemView.h"

@interface ScrollMenuView()<UIScrollViewDelegate>
{
    CGFloat _itemSpace;
}

@property(nonatomic,strong) UIScrollView *menuScrollView;
@property(nonatomic,strong) UIScrollView *contentView;

@property(nonatomic,strong) NSMutableArray *menuBtnArray;

@property (nonatomic, assign) NSInteger selectedIndex;

@end

@implementation ScrollMenuView


-(instancetype)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {
        _itemSpace =  20;
        self.selectedIndex = 0;
        
        self.menuBtnArray = [[NSMutableArray alloc]init];
        
        UIScrollView *menuScrollView = [[UIScrollView alloc]initWithFrame:CGRectMake(0, 0, frame.size.width, 40)];
        menuScrollView.delegate = self;
        menuScrollView.showsVerticalScrollIndicator = NO;
        menuScrollView.showsHorizontalScrollIndicator = NO;
        [self addSubview:menuScrollView];
        self.menuScrollView = menuScrollView;
        
        UIScrollView *contentView = [[UIScrollView alloc]initWithFrame:CGRectMake(0, CGRectGetMaxY(menuScrollView.frame), frame.size.width, frame.size.height - CGRectGetHeight(menuScrollView.frame))];
        contentView.delegate = self;
        contentView.showsVerticalScrollIndicator = NO;
        contentView.showsHorizontalScrollIndicator = NO;
        contentView.pagingEnabled = YES;
        [self addSubview:contentView];
        self.contentView = contentView;
        
    }
    return self;
}

-(void)setScrollMenuView {
    
    [self.menuBtnArray removeAllObjects];
    [self.menuScrollView removeAllSubviews];
    [self.contentView removeAllSubviews];
    
    if (self.titleArray.count > 0) {
        CGFloat allWidth = 0;
        for (int i = 0; i < self.titleArray.count; i++) {
            NSString *text = _titleArray[i];
            
            YXMenuItemView *menuItemView = [[YXMenuItemView alloc]init];
            NSDictionary *dict = @{NSFontAttributeName: menuItemView.textLabel.font};
            CGSize textSize = [text boundingRectWithSize:CGSizeMake(200, 30) options:NSStringDrawingUsesLineFragmentOrigin attributes:dict context:nil].size;
            
            CGFloat width = textSize.width+2;
            [menuItemView.colorView mas_updateConstraints:^(MASConstraintMaker *make) {
                make.width.equalTo(@(width));
            }];
            menuItemView.frame = CGRectMake(i*_itemSpace + allWidth + 10, 0, width, 30);
            allWidth = allWidth + width;
            
            menuItemView.textLabel.text = text;
            
            if (i == self.selectedIndex) {
                menuItemView.colorView.hidden = NO;
                menuItemView.textLabel.textColor = [UIColor colorWithHexString:@"#333333"];
            }else{
                menuItemView.colorView.hidden = YES;
                menuItemView.textLabel.textColor = [UIColor colorWithHexString:@"#999999"];
            }
            [self.menuScrollView addSubview:menuItemView];
            
            menuItemView.tag = i;
            UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(menuItemTapAction:)];
            [menuItemView addGestureRecognizer:tap];
            
        }
        
        self.menuScrollView.contentSize = CGSizeMake(_titleArray.count * _itemSpace + allWidth, 30);
    }else{
        NSLog(@"--- titleArray为空 ---");
    }
    
    if (self.subArray.count > 0) {
        self.contentView.contentSize = CGSizeMake(self.subArray.count * CGRectGetWidth(self.contentView.frame), CGRectGetHeight(self.contentView.frame));
        
        for (int j = 0; j < self.subArray.count; j++) {
            UIView *tempView = self.subArray[j];
            tempView.frame = CGRectMake(j * CGRectGetWidth(self.contentView.frame), 0, CGRectGetWidth(self.contentView.frame), CGRectGetHeight(self.contentView.frame));
            [self.contentView addSubview:tempView];
        }
    }else{
        NSLog(@"--- subArray为空 ---");
    }
}

-(void)menuItemTapAction:(UITapGestureRecognizer *)tap{
    NSInteger tag = tap.view.tag;
    self.selectedIndex = tag;
    [self changeViewWithAnimate:self.selectedIndex];
}

- (void)scrollViewDidScroll:(UIScrollView *)scrollView
{
    if ([scrollView isEqual:self.contentView]) {
        NSLog(@"--------- %f",scrollView.contentOffset.x);
        int num = scrollView.contentOffset.x * pow(10, 6);
        int tempNum = SCREEN_WIDTH * pow(10, 6);
        if (num % tempNum != 0) {
            return;
        }
        
        int index = scrollView.contentOffset.x/SCREEN_WIDTH;
        NSLog(@"-----index---- %d",index);
        if ([self.delegate respondsToSelector:@selector(scrollMenuViewAtIndexPath:)]) {
            [self.delegate scrollMenuViewAtIndexPath:index];
        }
        
        self.selectedIndex =  index;
        [self changeViewWithAnimate:self.selectedIndex];
    }
}

-(void)changeViewWithAnimate:(NSInteger)index {
    NSArray *subViews = self.menuScrollView.subviews;
    if (self.menuScrollView.subviews.count > index) {
        UIView *view = self.menuScrollView.subviews[index];
        [self.menuScrollView scrollRectToVisible:view.frame animated:YES];
    }

    for (int i = 0; i < self.menuScrollView.subviews.count; i++) {
        YXMenuItemView *menuItemView = self.menuScrollView.subviews[i];
        if (i == index) {
            menuItemView.colorView.hidden = NO;
            menuItemView.textLabel.textColor = [UIColor colorWithHexString:@"#333333"];
        }else{
            menuItemView.colorView.hidden = YES;
            menuItemView.textLabel.textColor = [UIColor colorWithHexString:@"#999999"];
        }
    }
    
    self.contentView.contentOffset = CGPointMake(index * CGRectGetWidth(self.contentView.frame), 0);
    
    if ([self.delegate respondsToSelector:@selector(scrollMenuViewAtIndexPath:)]) {
        [self.delegate scrollMenuViewAtIndexPath:index];
    }
}


-(UIColor *)backColor
{
    if (_backColor == nil) {
        self.menuScrollView.backgroundColor = [UIColor grayColor];
        return [UIColor grayColor];
    }
    self.menuScrollView.backgroundColor = _backColor;
    return _backColor;
}

-(UIColor *)normalColor
{
    if (_normalColor == nil) {
        return [UIColor blackColor];
    }
    return _normalColor;
}


-(UIColor *)selectColor
{
    if (_selectColor == nil) {
        return [UIColor blueColor];
    }
    return _selectColor;
}




/*
// Only override drawRect: if you perform custom drawing.
// An empty implementation adversely affects performance during animation.
- (void)drawRect:(CGRect)rect {
    // Drawing code
}
*/

@end