//
//  InstallReceiptHomeViewController.m
//  IBOSS
//
//  Created by guan hong hou on 2017/7/10.
//  Copyright © 2017年 沈阳东科云信软件有限公司. All rights reserved.
//
//  功能描述：安装回执主页视图控制器

#import "InstallReceiptHomeViewController.h"

@interface InstallReceiptHomeViewController ()

@end

@implementation InstallReceiptHomeViewController

//导航数
static  int navcount = 2;

#pragma mark - 公共函数

/**
 视图加载函数
 */
- (void)viewDidLoad {
    [super viewDidLoad];
    self.navigationItem.title = @"安装回执一览";
    UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
    [button setImage:[UIImage imageNamed:@"icon_back.png"] forState:UIControlStateNormal];
    [button addTarget:self action:@selector(goBack)
     forControlEvents:UIControlEventTouchUpInside];
    button.frame = CGRectMake(0, 0,45,22);
    UIBarButtonItem *menuButton = [[UIBarButtonItem alloc] initWithCustomView:button];
    self.navigationItem.leftBarButtonItem = menuButton;
    [self initUI];
    [self setMainSrollView];
    [self sliderWithTag:self.currentIndex+1];
}

/**
 安全区视图发生变化
 */
-(void)viewSafeAreaInsetsDidChange{
    self.view.backgroundColor = [UIColor whiteColor];
    _mainScrollView.frame = CGRectMake(0, 40, Screen_Width,self.view.safeAreaLayoutGuide.layoutFrame.size.height-40);
    for (NSInteger i = 0; i < _mainScrollView.subviews.count; i++) {
        _mainScrollView.subviews[i].frame = CGRectMake(Screen_Width * i, 0, Screen_Width,CGRectGetHeight(_mainScrollView.frame));
    }
    [self.installUnreceiptVC viewSafeAreaInsetsDidChange];
    [self.installReceiptVC viewSafeAreaInsetsDidChange];
    [super viewSafeAreaInsetsDidChange];
}

/**
初始化安装未回执控制器
 @return <#return value description#>
 */
- (InstallUnreceiptVC *)installUnreceiptVC{
    if (_installUnreceiptVC == nil) {
        _installUnreceiptVC = [[InstallUnreceiptVC alloc] init];
        _installUnreceiptVC.cNav = self.navigationController;
        
    }
    return _installUnreceiptVC;
}

/**
 初始化安装回执控制器
 @return <#return value description#>
 */
- (InstallReceiptedVC *)installReceiptVC{
    if (_installReceiptVC == nil) {
        _installReceiptVC = [[InstallReceiptedVC   alloc] init];
        _installReceiptVC.cNav = self.navigationController;
    }
    return _installReceiptVC;
}


#pragma mark - 委托函数
/**
 滑动label位置
 @param scrollView <#scrollView description#>
 */
- (void)scrollViewDidScroll:(UIScrollView *)scrollView{
    //实时计算当前位置,实现和titleView上的按钮的联动
    CGFloat contentOffSetX = scrollView.contentOffset.x;
    CGFloat x = contentOffSetX / navcount;
    CGRect frame  = _sliderLabel.frame;
    frame.origin.x = x;
    _sliderLabel.frame = frame;
}

/**
 滑动完成
 @param scrollView <#scrollView description#>
 */
- (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView{
    CGFloat contentOffSetX = scrollView.contentOffset.x;
    int index = contentOffSetX / Screen_Width;
    [self sliderWithTag:index + 1];
}


#pragma mark - 私有函数

/*
 初始化UI
 */
- (void)initUI{
    UIView *navView = [[UIView alloc]initWithFrame:CGRectMake(0, 0, Screen_Width, 40)];
    [self.view addSubview:navView];
    [self.view setBackgroundColor:[UIColor whiteColor]];
    _installUnreceiptButton = [UIButton buttonWithType:UIButtonTypeCustom];
    [_installUnreceiptButton setTitleColor:[UIColor redColor] forState:UIControlStateSelected];
    [_installUnreceiptButton setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
    _installUnreceiptButton.frame = CGRectMake(0, 0, Screen_Width / navcount, navView.frame.size.height);
    _installUnreceiptButton.titleLabel.font = [UIFont systemFontOfSize:ButtonFontOfSize];
    [_installUnreceiptButton addTarget:self action:@selector(sliderAction:) forControlEvents:UIControlEventTouchUpInside];
    [_installUnreceiptButton setTitle:@"未回执" forState:UIControlStateNormal];
    
    _installUnreceiptButton.tag = 1;
    _installUnreceiptButton.selected = YES;
    [navView addSubview:_installUnreceiptButton];
    _installReceiptedButton= [UIButton buttonWithType:UIButtonTypeCustom];
    _installReceiptedButton.frame = CGRectMake(CGRectGetMaxX(_installUnreceiptButton.frame),0, Screen_Width / navcount, navView.frame.size.height);
    [_installReceiptedButton setTitleColor:[UIColor redColor] forState:UIControlStateSelected];
    [_installReceiptedButton setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
    
    _installReceiptedButton.titleLabel.font = [UIFont systemFontOfSize:ButtonFontOfSize];
    [_installReceiptedButton addTarget:self action:@selector(sliderAction:) forControlEvents:UIControlEventTouchUpInside];
    [_installReceiptedButton setTitle:@"已回执" forState:UIControlStateNormal];
    _installReceiptedButton.titleLabel.font = [UIFont systemFontOfSize:ButtonFontOfSize];
    _installReceiptedButton.tag = 2;
    [navView addSubview: _installReceiptedButton];
    _sliderLabel = [[UILabel alloc]initWithFrame:CGRectMake(_installUnreceiptButton.frame.origin.x, 40 - 2, Screen_Width / navcount, 2)];
    UIView *line = [[UIView alloc] initWithFrame:CGRectMake(((Screen_Width/navcount)-50)/2, 0, 50, 2)];
    line.backgroundColor = [UIColor redColor];
    [_sliderLabel addSubview:line];
    [navView addSubview:_sliderLabel];
}

/**
 滑动tag
 @param tag <#tag description#>
 */
- (void)sliderWithTag:(NSInteger)tag{
    self.currentIndex = tag;
    _installUnreceiptButton.selected = NO;
    _installReceiptedButton.selected = NO;
    UIButton *sender = [self buttonWithTag:tag];
    sender.selected = YES;
    //动画
    _sliderLabel.frame = CGRectMake(sender.frame.origin.x, _sliderLabel.frame.origin.y, _sliderLabel.frame.size.width, _sliderLabel.frame.size.height);
    
}

/**
 按钮点击事件
 @param sender <#sender description#>
 */
- (void)sliderAction:(UIButton *)sender{
    if (self.currentIndex == sender.tag) {
        return;
    }
    [self.view endEditing:YES];
    [self sliderAnimationWithTag:sender.tag];
    [UIView animateWithDuration:0.3 animations:^{
        _mainScrollView.contentOffset = CGPointMake(Screen_Width*(sender.tag - 1), 0);
    } completion:^(BOOL finished) {
        
    }];
}


/**
 滑动tag
 
 @param tag <#tag description#>
 */
- (void)sliderAnimationWithTag:(NSInteger)tag{
    self.currentIndex = tag;
    _installReceiptedButton.selected = NO;
    _installUnreceiptButton.selected = NO;
    UIButton *sender = [self buttonWithTag:tag];
    sender.selected = YES;
    //动画
    [UIView animateWithDuration:0.3 animations:^{
        _sliderLabel.frame = CGRectMake(sender.frame.origin.x, _sliderLabel.frame.origin.y, _sliderLabel.frame.size.width, _sliderLabel.frame.size.height);
        
    } completion:^(BOOL finished) {
        
    }];
}


/*
 获得导航按钮
 */
- (UIButton *)buttonWithTag:(NSInteger )tag{
    if (tag == 1) {
        return  _installUnreceiptButton;
    }
    else if (tag == 2){
        return  _installReceiptedButton;
    }
    
    else{
        return nil;
    }
}


/**
 初始化srollView
 */
- (void)setMainSrollView{
    _mainScrollView = [[UIScrollView alloc]initWithFrame:CGRectMake(0, 40, Screen_Width, self.view.frame.size.height)];
    _mainScrollView.delegate = self;
    _mainScrollView.backgroundColor = [UIColor whiteColor];
    _mainScrollView.pagingEnabled = YES;
    _mainScrollView.showsHorizontalScrollIndicator = NO;
    _mainScrollView.showsVerticalScrollIndicator = NO;
    [self.view addSubview:_mainScrollView];
    NSArray *views = @[self.installUnreceiptVC.view,self.installReceiptVC.view];
    for (NSInteger i = 0; i < views.count; i++) {
        //把三个vc的view依次贴到mainScrollView上面
        UIView *pageView = [[UIView alloc]initWithFrame:CGRectMake(Screen_Width * i, 0, _mainScrollView.frame.size.width, _mainScrollView.frame.size.height - 100)];
        [pageView addSubview:views[i]];
        [_mainScrollView addSubview:pageView];
    }
    _mainScrollView.contentSize = CGSizeMake(Screen_Width*(views.count), 0);
    //滚动到_currentIndex对应的tab
    [_mainScrollView setContentOffset:CGPointMake((_mainScrollView.frame.size.width) * _currentIndex, 0) animated:YES];
}

/**
 返回到父视图
 */
- (void)goBack{
    [self.navigationController popViewControllerAnimated:YES];
}


@end