//
//  MOScrollMenuView.m
//  powerone
//
//  Created by SuperC on 2019/8/8.
//  Copyright © 2019 onecloud.ltd. All rights reserved.
//

#define TitleFont 12.0
#define ImageViewWidthAndHeight 18.0
#define ImageViewX 10.0

#import "MOScrollMenuView.h"
#import "UIView+Extension.h"
#import "MOCountryList.h"
#import "MOThemeManager.h"

@implementation MOCountryBtn

- (void)layoutSubviews{
    [super layoutSubviews];
    
    if(self.imageView.image != nil)
    {
        self.imageView.width = ImageViewWidthAndHeight;
        self.imageView.height = ImageViewWidthAndHeight;
        self.imageView.x = ImageViewX;
        self.imageView.centerY = self.centerY;
        
        UIFont *customFont = [UIFont fontWithName:kNormalContentFontStr size:12.0];
        if(!customFont){
            customFont = [MOTextTools MODisplayFontWithSize:12.0 bold:YES itatic:YES weight:UIFontWeightMedium];
        }
        
        CGFloat width = [MOTools getWidthWithString:self.titleLabel.text font:customFont] + 2.0;
        self.titleLabel.frame = CGRectMake(CGRectGetMaxX(self.imageView.frame) + 2, 0, width, (TitleFont + 2.0));
        self.titleLabel.centerY = self.imageView.centerY;
        self.titleLabel.textAlignment = NSTextAlignmentCenter;
    }
}

@end


@implementation MOScrollMenuView
{
    /** 用于记录最后创建的控件 */
    UIView *_lastView;
    /** 按钮下面的横线 */
    UIView *_lineView;
}

#pragma mark - 重写构造方法
/** 重写构造方法 */
- (instancetype)initWithFrame:(CGRect)frame
{
    if (self = [super initWithFrame:frame]) 
    {
        self.showsHorizontalScrollIndicator = NO;
        self.contentInset = UIEdgeInsetsMake(0, 0, 0, 10);
        _currentButtonIndex = 0; // 默认当前选择的按钮是第一个
    }
    return self;
}

- (void)layoutSubviews {
    [super layoutSubviews];
    
    if (!self.layer.mask) {
        CAGradientLayer *maskLayer = [CAGradientLayer layer];
        
        // 设置水平渐变
        maskLayer.startPoint = CGPointMake(0.0, 0.5);
        maskLayer.endPoint = CGPointMake(1.0, 0.5);
        
        maskLayer.locations = @[@0.0, @0.1, @0.9, @1.0];
        maskLayer.bounds = CGRectMake(0, 0, self.frame.size.width, self.frame.size.height);
        maskLayer.anchorPoint = CGPointZero;
        
        self.layer.mask = maskLayer;
    }
    
    [self updateGradientMask];
}

- (void)updateGradientMask {
    CGColorRef outerColor = [UIColor colorWithWhite:1.0 alpha:0.0].CGColor;
    CGColorRef innerColor = [UIColor colorWithWhite:1.0 alpha:1.0].CGColor;
    
    if (self.contentOffset.x <= 0) {
        // 最左边
        ((CAGradientLayer *)self.layer.mask).colors = @[
            (__bridge id)innerColor,
            (__bridge id)innerColor,
            (__bridge id)innerColor,
            (__bridge id)outerColor
        ];
    } else if (self.contentOffset.x + self.frame.size.width >= self.contentSize.width) {
        // 最右边
        ((CAGradientLayer *)self.layer.mask).colors = @[
            (__bridge id)outerColor,
            (__bridge id)innerColor,
            (__bridge id)innerColor,
            (__bridge id)innerColor
        ];
    } else {
        // 中间
        ((CAGradientLayer *)self.layer.mask).colors = @[
            (__bridge id)outerColor,
            (__bridge id)innerColor,
            (__bridge id)innerColor,
            (__bridge id)outerColor
        ];
    }
    
    [CATransaction begin];
    [CATransaction setDisableActions:YES];
    self.layer.mask.position = CGPointMake(self.contentOffset.x, 0);  // 水平方向偏移
    [CATransaction commit];
}

- (void)setContentOffset:(CGPoint)contentOffset {
    [super setContentOffset:contentOffset];
    [self updateGradientMask];
}

- (void)reloadData {
    [self setTitleArray:_titleArray];
    WEAKSELF
    dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.1 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
        [weakSelf setCurrentButtonIndex:weakSelf.currentButtonIndex];
    });
}

#pragma mark - 赋值标题数组
/** 赋值标题数组 */
- (void)setTitleArray:(NSArray *)titleArray
{
    _titleArray = titleArray;
    
    // 先将所有子控件移除
    for (UIView *subView in self.subviews) 
    {
        [subView removeFromSuperview];
    }
    
    // 将lastView置空
    _lastView = nil;
    
    // 遍历标题数组
    [_titleArray enumerateObjectsUsingBlock:^(MOCountryList   * _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop)
    {
        __block MOCountryBtn *menuButton = [MOCountryBtn buttonWithType:UIButtonTypeCustom];
        [self addSubview:menuButton];
        if (_lastView) 
        {
            menuButton.frame = CGRectMake(_lastView.maxX + 10, 0, 100, self.height);
        }
        else
        {
            menuButton.frame = CGRectMake(0, 0, 100, self.height);
        }
        
        menuButton.layer.masksToBounds = YES;
        menuButton.layer.cornerRadius = self.height / 2.0;
        menuButton.tag = 100 + idx;
        
        if(obj.icon.length > 0){
            [menuButton sd_setImageWithURL:[NSURL URLWithString:obj.icon] forState:UIControlStateNormal];
            [menuButton sd_setImageWithURL:[NSURL URLWithString:obj.icon] forState:UIControlStateSelected];
        }
        else{
            [menuButton sd_setImageWithURL:[NSURL URLWithString:@""] forState:UIControlStateNormal];
            [menuButton sd_setImageWithURL:[NSURL URLWithString:@""] forState:UIControlStateSelected];
        }
        menuButton.imageView.contentMode = UIViewContentModeScaleAspectFit;
        
        UIFont *customFont = [UIFont fontWithName:kNormalContentFontStr size:12.0];
        if(!customFont){
            customFont = [MOTextTools MODisplayFontWithSize:12.0 bold:YES itatic:YES weight:UIFontWeightMedium];
        }
        
        [menuButton.titleLabel setFont:customFont];
        [menuButton setTitleColor:[MOTools colorWithHexString:@"#26252A" alpha:1.0] forState:UIControlStateNormal];
        if ([MOThemeManager shareManager].canUseTheme && [MOThemeManager shareManager].themeModel.countryColor.length > 0) {
            [menuButton setTitleColor:[MOTools colorWithHexString:[MOThemeManager shareManager].themeModel.countryColor] forState:UIControlStateNormal];
        }
        [menuButton setTitleColor:[MOTools colorWithHexString:@"#26252A" alpha:1.0] forState:UIControlStateSelected];
        if ([MOThemeManager shareManager].canUseTheme && [MOThemeManager shareManager].themeModel.countryColorOn.length > 0) {
            [menuButton setTitleColor:[MOTools colorWithHexString:[MOThemeManager shareManager].themeModel.countryColorOn] forState:UIControlStateSelected];
        }
        [menuButton setTitle:obj.name forState:UIControlStateNormal];
        [menuButton setTitle:obj.name forState:UIControlStateSelected];
        menuButton.backgroundColor = [MOTools colorWithHexString:@"#FFFFFF" alpha:1.0];
        if ([MOThemeManager shareManager].canUseTheme && [MOThemeManager shareManager].themeModel.countryBgColor.length > 0) {
            menuButton.backgroundColor = [MOTools colorWithHexString:[MOThemeManager shareManager].themeModel.countryBgColor];
        }
        [menuButton addTarget:self action:@selector(menuButtonClicked:) forControlEvents:UIControlEventTouchUpInside];
        
        // 宽度自适应
        [menuButton sizeToFit];
        if(obj.icon.length > 0){
            CGFloat labebTextWidth = [MOTools getWidthWithString:obj.name font:customFont] + 2.0;
            CGFloat labelWidth = ImageViewX * 2.0 + ImageViewWidthAndHeight + labebTextWidth;
            menuButton.width = labelWidth;
        }
        else{
            menuButton.width = menuButton.width + 20.0;
        }
        
        menuButton.height = self.height;
        
        // 这句不能少，不然初始化时button的label的宽度为0
        [menuButton layoutIfNeeded];
        
        // 默认第一个按钮时选中状态
        if (idx == 0) 
        {
            menuButton.selected = YES;
            menuButton.backgroundColor = [MOTools colorWithHexString:@"#16E0FE" alpha:1.0];
            if ([MOThemeManager shareManager].canUseTheme && [MOThemeManager shareManager].themeModel.countryBgColorOn.length > 0) {
                menuButton.backgroundColor = [MOTools colorWithHexString:[MOThemeManager shareManager].themeModel.countryBgColorOn];
            }
        }
        
        _lastView = menuButton;
    }];
    
    self.contentSize = CGSizeMake(CGRectGetMaxX(_lastView.frame), CGRectGetHeight(self.frame));
}

#pragma mark - 菜单按钮点击
/** 菜单按钮点击 */
- (void)menuButtonClicked:(MOCountryBtn *)sender
{
    // 改变按钮的选中状态
//    for (MOCountryBtn *button in self.subviews)
//    {
//        if ([button isKindOfClass:[MOCountryBtn class]])
//        {
//            button.selected = NO;
//            button.backgroundColor = [MOTools colorWithHexString:@"#F5F1F6" alpha:1.0];
//            button.layer.borderColor = [MOTools colorWithHexString:@"#F5F1F6" alpha:1.0].CGColor;
//        }
//    }
//    sender.selected = YES;
//    sender.backgroundColor = [MOTools colorWithHexString:@"#F0DAFD" alpha:1.0];
//    sender.layer.borderColor = [MOTools colorWithHexString:@"#E72DD3" alpha:1.0].CGColor;
//    
//    // 将所点击的button移到中间
//    if (_lastView.maxX > self.width) 
//    {
//        if (sender.x >= self.width / 2 && sender.centerX <= self.contentSize.width - self.width/2) 
//        {
//            [UIView animateWithDuration:0.3 animations:^
//            {
//                self.contentOffset = CGPointMake(sender.centerX - self.width / 2, 0);
//            }];
//        }
//        else if (sender.frame.origin.x < self.width / 2)
//        {
//            [UIView animateWithDuration:0.3 animations:^
//            {
//                self.contentOffset = CGPointMake(0, 0);
//            }];
//        }
//        else
//        {
//            [UIView animateWithDuration:0.3 animations:^
//            {
//                self.contentOffset = CGPointMake(self.contentSize.width - self.width, 0);
//            }];
//        }
//    }
    
    self.currentButtonIndex = sender.tag - 100;
    
    if (self.clickBtnBlock)
    {
        self.clickBtnBlock(sender.tag - 100);
    }
}

#pragma mark - 赋值当前选择的按钮
/** 赋值当前选择的按钮 */
- (void)setCurrentButtonIndex:(NSInteger)currentButtonIndex
{
    _currentButtonIndex = currentButtonIndex;
    
    // 改变按钮的选中状态
    MOCountryBtn *currentButton = [self viewWithTag:(100 + currentButtonIndex)];
    for (MOCountryBtn *button in self.subviews)
    {
        if ([button isKindOfClass:[MOCountryBtn class]])
        {
            button.selected = NO;
            button.backgroundColor = [MOTools colorWithHexString:@"#FFFFFF" alpha:1.0];
            if ([MOThemeManager shareManager].canUseTheme && [MOThemeManager shareManager].themeModel.countryBgColor.length > 0) {
                button.backgroundColor = [MOTools colorWithHexString:[MOThemeManager shareManager].themeModel.countryBgColor];
            }
        }
    }
    currentButton.selected = YES;
    currentButton.backgroundColor = [MOTools colorWithHexString:@"#16E0FE" alpha:1.0];
    if ([MOThemeManager shareManager].canUseTheme && [MOThemeManager shareManager].themeModel.countryBgColorOn.length > 0) {
        currentButton.backgroundColor = [MOTools colorWithHexString:[MOThemeManager shareManager].themeModel.countryBgColorOn];
    }
    
    // 将所点击的button移到中间
    if (_lastView.maxX > self.width) 
    {
        if (currentButton.x >= self.width / 2 && currentButton.centerX <= self.contentSize.width - self.width/2) 
        {
            [UIView animateWithDuration:0.3 animations:^
            {
                self.contentOffset = CGPointMake(currentButton.centerX - self.width / 2, 0);
            }];
        }
        else if (currentButton.x < self.width / 2)
        {
            [UIView animateWithDuration:0.3 animations:^
            {
                self.contentOffset = CGPointMake(0, 0);
            }];
        }
        else
        {
            [UIView animateWithDuration:0.3 animations:^
            {
                self.contentOffset = CGPointMake(self.contentSize.width - self.width + self.contentInset.right, 0);
            }];
        }
    }
}

@end