//
//  ScanViewController.m
//  Haishenghai-master
//
//  Created by GG on 2019/1/3.
//  Copyright © 2019年 Haishenghai intelligence network technology. All rights reserved.
//

#import "ScanViewController.h"
#import "EditLocationVC.h"
#import "Header.h"
#define KMainW [UIScreen mainScreen].bounds.size.width
#define KMainH [UIScreen mainScreen].bounds.size.height
@interface ScanViewController ()<AVCaptureMetadataOutputObjectsDelegate,UITextFieldDelegate>

@end

@implementation ScanViewController
-(void)viewWillAppear:(BOOL)animated{
    [super viewWillAppear:YES];
    //开始扫描
    [_session startRunning];
    //添加定时器
    [self addTimer];

    //定时器开始
    self.timer.fireDate = [NSDate distantPast];
}
- (void)viewWillDisappear:(BOOL)animated
{
    [super viewWillDisappear:animated];
    
    [self stopScanning];
}
- (void)initInfo
{
    //背景色
    self.view.backgroundColor = [UIColor blackColor];
    
    //导航标题
    self.navigationItem.title = @"二维码/条形码";
    
}
- (void)viewDidLoad {
    [super viewDidLoad];
    //设置导航栏左侧按钮
    UIButton *backBtn = [UIButton buttonWithType:UIButtonTypeCustom];
    [backBtn setImage:[UIImage imageNamed:@"hsh_return"] forState:UIControlStateNormal];
    backBtn.frame = CGRectMake(0, 0, 44, 44);
    [backBtn addTarget:self action:@selector(backClick) forControlEvents:UIControlEventTouchUpInside];
    backBtn.contentHorizontalAlignment = UIControlContentHorizontalAlignmentLeft;
    self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc]initWithCustomView:backBtn];
    

    self.title = @"扫码";
    //初始化信息
    [self initInfo];
    
    //创建控件
    [self creatControl];
    
    //设置参数
    [self setupCamera];
    
    //添加定时器
    [self addTimer];
    
}
-(void)backClick{
    [self.navigationController popViewControllerAnimated:YES];
}
- (void)creatControl
{
    CGFloat scanW = KMainW * 0.65;
    CGFloat padding = 10.0f;
    CGFloat labelH = 20.0f;
    CGFloat tabBarH = 64.0f;
    CGFloat cornerW = 26.0f;
    CGFloat marginX = (KMainW - scanW) * 0.5;
    CGFloat marginY = (KMainH - scanW - padding - labelH) * 0.5;
    
    //遮盖视图
    for (int i = 0; i < 4; i++) {
        UIView *cover = [[UIView alloc] initWithFrame:CGRectMake(0, (marginY + scanW) * i, KMainW, marginY + (padding + labelH) * i)];
        if (i == 2 || i == 3) {
            cover.frame = CGRectMake((marginX + scanW) * (i - 2), marginY, marginX, scanW);
        }
        cover.backgroundColor = [[UIColor blackColor] colorWithAlphaComponent:0.5f];
        [self.view addSubview:cover];
    }
    
    //扫描视图
    UIView *scanView = [[UIView alloc] initWithFrame:CGRectMake(marginX, marginY, scanW, scanW)];
    [self.view addSubview:scanView];
    
    //扫描线
    UIImageView *line = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, scanW, 2)];
    [self drawLineForImageView:line];
    [scanView addSubview:line];
    self.line = line;
    
    //边框
    UIView *borderView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, scanW, scanW)];
    borderView.layer.borderColor = [[UIColor whiteColor] CGColor];
    borderView.layer.borderWidth = 1.0f;
    [scanView addSubview:borderView];
    
    //扫描视图四个角
    for (int i = 0; i < 4; i++) {
        CGFloat imgViewX = (scanW - cornerW) * (i % 2);
        CGFloat imgViewY = (scanW - cornerW) * (i / 2);
        UIImageView *imgView = [[UIImageView alloc] initWithFrame:CGRectMake(imgViewX, imgViewY, cornerW, cornerW)];
        if (i == 0 || i == 1) {
            imgView.transform = CGAffineTransformRotate(imgView.transform, M_PI_2 * i);
        }else {
            imgView.transform = CGAffineTransformRotate(imgView.transform, - M_PI_2 * (i - 1));
        }
        [self drawImageForImageView:imgView];
        [scanView addSubview:imgView];
    }
    
    //提示标签
    UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(0, CGRectGetMaxY(scanView.frame) + padding, KMainW, labelH)];
    label.text = @"将二维码/条形码放入框内，即可自动扫描";
    label.font = [UIFont systemFontOfSize:16.0f];
    label.textAlignment = NSTextAlignmentCenter;
    label.textColor = [UIColor whiteColor];
    [self.view addSubview:label];
    
    //选项栏
    UIView *tabBarView = [[UIView alloc] initWithFrame:CGRectMake(0, KMainH - tabBarH, KMainW, tabBarH)];
    tabBarView.backgroundColor = [[UIColor blackColor] colorWithAlphaComponent:0.8f];
    [self.view addSubview:tabBarView];
    
    //开启照明按钮
    UIButton *lightBtn = [[UIButton alloc] initWithFrame:CGRectMake(WIDTH/2-90, 0, 80, tabBarH)];
    lightBtn.titleLabel.font = [UIFont systemFontOfSize:16.0f];
    [lightBtn setImage:[UIImage imageNamed:@"hsh_hone_turnonthelight"] forState:UIControlStateNormal];
//    [lightBtn setTitle:@"开启照明" forState:UIControlStateNormal];
//    [lightBtn setTitle:@"关闭照明" forState:UIControlStateSelected];
    [lightBtn addTarget:self action:@selector(lightBtnOnClick:) forControlEvents:UIControlEventTouchUpInside];
    [tabBarView addSubview:lightBtn];
    //手动输入按钮
    UIButton *inputBtn = [[UIButton alloc] initWithFrame:CGRectMake(WIDTH/2+10, 0, 80, tabBarH)];
    inputBtn.titleLabel.font = [UIFont systemFontOfSize:16.0f];
    [inputBtn setImage:[UIImage imageNamed:@"hsh_hone_input"] forState:UIControlStateNormal];
//    [inputBtn setTitle:@"手动输入" forState:UIControlStateNormal];
//    [inputBtn setTitle:@"手动输入" forState:UIControlStateSelected];
    [inputBtn addTarget:self action:@selector(inputBtnOnClick:) forControlEvents:UIControlEventTouchUpInside];
    [tabBarView addSubview:inputBtn];

    
}
- (void)setupCamera
{
    dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
        //初始化相机设备
        _device = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];
        
        //初始化输入流
        AVCaptureDeviceInput *input = [AVCaptureDeviceInput deviceInputWithDevice:_device error:nil];
        
        //初始化输出流
        AVCaptureMetadataOutput *output = [[AVCaptureMetadataOutput alloc] init];
        //设置代理，主线程刷新
        [output setMetadataObjectsDelegate:self queue:dispatch_get_main_queue()];
        
        //初始化链接对象
        _session = [[AVCaptureSession alloc] init];
        //高质量采集率
        [_session setSessionPreset:AVCaptureSessionPresetHigh];
        
        if ([_session canAddInput:input]) [_session addInput:input];
        if ([_session canAddOutput:output]) [_session addOutput:output];
        
        //条码类型（二维码/条形码）
        output.metadataObjectTypes = [NSArray arrayWithObjects:AVMetadataObjectTypeEAN13Code, AVMetadataObjectTypeEAN8Code, AVMetadataObjectTypeCode128Code, AVMetadataObjectTypeQRCode, nil];
        
        //更新界面
        dispatch_async(dispatch_get_main_queue(), ^{
            _preview = [AVCaptureVideoPreviewLayer layerWithSession:_session];
            _preview.videoGravity = AVLayerVideoGravityResizeAspectFill;
            _preview.frame = CGRectMake(0, 0, KMainW, KMainH);
            [self.view.layer insertSublayer:_preview atIndex:0];
            [_session startRunning];
        });
    });
}

- (void)addTimer
{
    _distance = 0;
    self.timer = [NSTimer scheduledTimerWithTimeInterval:0.01f target:self selector:@selector(timerAction) userInfo:nil repeats:YES];
    [[NSRunLoop mainRunLoop] addTimer:self.timer forMode:NSRunLoopCommonModes];
}

- (void)timerAction
{
    if (_distance++ > KMainW * 0.65) _distance = 0;
    _line.frame = CGRectMake(0, _distance, KMainW * 0.65, 2);
    //添加动画
   
}

- (void)removeTimer
{
    [_timer invalidate];
    _timer = nil;
}

//照明按钮点击事件
- (void)lightBtnOnClick:(UIButton *)btn
{
    //判断是否有闪光灯
    if (![_device hasTorch]) {
        [self showAlertWithTitle:@"当前设备没有闪光灯，无法开启照明功能" message:nil sureHandler:nil cancelHandler:nil];
        return;
    }
    
    btn.selected = !btn.selected;
    
    [_device lockForConfiguration:nil];
    if (btn.selected) {
        [_device setTorchMode:AVCaptureTorchModeOn];
    }else {
        [_device setTorchMode:AVCaptureTorchModeOff];
    }
    [_device unlockForConfiguration];
}
-(void)inputBtnOnClick:(UIButton *)inputBtn{
    //自定义消息提示框
    [self inputMessage];
}
#pragma mark - AVCaptureMetadataOutputObjectsDelegate
- (void)captureOutput:(AVCaptureOutput *)captureOutput didOutputMetadataObjects:(NSArray *)metadataObjects fromConnection:(AVCaptureConnection *)connection
{
    //扫描完成
    if ([metadataObjects count] > 0) {
        AVMetadataMachineReadableCodeObject * metadataObject = metadataObjects.firstObject;
        //得到解析到的结果
        NSString * stringValue;
        stringValue = metadataObject.stringValue;
        NSLog(@"%@",stringValue);
        //http://www.cccf.com.cn/lableFind.jsp?lableCode=30452AA09471AA
        //字符串截取
        NSArray *array = [stringValue componentsSeparatedByString:@"="];
        NSLog(@"array:%@",array);
        NSLog(@"array2:%@",[array objectAtIndex:1]);

        EditLocationVC *editVc = [[EditLocationVC alloc]init];
        editVc.deveceNumber = [array objectAtIndex:1];
        editVc.deveceName = self.deveceName;
        [self.navigationController pushViewController:editVc animated:YES];
        //在这里播放音效文件
        [self playSound];
        //停止扫描
        [self stopScanning];
//        //显示结果跳转
        
     }
}

- (void)stopScanning
{
    [_session stopRunning];
    _session = nil;
    [_preview removeFromSuperlayer];
    [self removeTimer];
}

////提示弹窗
- (void)showAlertWithTitle:(NSString *)title message:(NSString *)message sureHandler:(void (^)())sureHandler cancelHandler:(void (^)())cancelHandler
{
    UIAlertController *alertController = [UIAlertController alertControllerWithTitle:title message:message preferredStyle:UIAlertControllerStyleAlert];
    UIAlertAction *sureAction = [UIAlertAction actionWithTitle:@"确认" style:UIAlertActionStyleDefault handler:sureHandler];
    UIAlertAction *cancelAction = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:cancelHandler];
    [alertController addAction:sureAction];
    [alertController addAction:cancelAction];

    [self presentViewController:alertController animated:YES completion:nil];
}

//绘制角图片
- (void)drawImageForImageView:(UIImageView *)imageView
{
    UIGraphicsBeginImageContext(imageView.bounds.size);
    
    //获取上下文
    CGContextRef context = UIGraphicsGetCurrentContext();
    //设置线条宽度
    CGContextSetLineWidth(context, 6.0f);
    //设置颜色
    CGContextSetStrokeColorWithColor(context, [[UIColor greenColor] CGColor]);
    //路径
    CGContextBeginPath(context);
    //设置起点坐标
    CGContextMoveToPoint(context, 0, imageView.bounds.size.height);
    //设置下一个点坐标
    CGContextAddLineToPoint(context, 0, 0);
    CGContextAddLineToPoint(context, imageView.bounds.size.width, 0);
    //渲染，连接起点和下一个坐标点
    CGContextStrokePath(context);
    
    imageView.image = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
}

//绘制线图片
- (void)drawLineForImageView:(UIImageView *)imageView
{
    CGSize size = imageView.bounds.size;
    UIGraphicsBeginImageContext(size);
    
    //获取上下文
    CGContextRef context = UIGraphicsGetCurrentContext();
    //创建一个颜色空间
    CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
    //设置开始颜色
    const CGFloat *startColorComponents = CGColorGetComponents([[UIColor greenColor] CGColor]);
    //设置结束颜色
    const CGFloat *endColorComponents = CGColorGetComponents([[UIColor whiteColor] CGColor]);
    //颜色分量的强度值数组
    CGFloat components[8] = {startColorComponents[0], startColorComponents[1], startColorComponents[2], startColorComponents[3], endColorComponents[0], endColorComponents[1], endColorComponents[2], endColorComponents[3]
    };
    //渐变系数数组
    CGFloat locations[] = {0.0, 1.0};
    //创建渐变对象
    CGGradientRef gradient = CGGradientCreateWithColorComponents(colorSpace, components, locations, 2);
    //绘制渐变
    CGContextDrawRadialGradient(context, gradient, CGPointMake(size.width * 0.5, size.height * 0.5), size.width * 0.25, CGPointMake(size.width * 0.5, size.height * 0.5), size.width * 0.5, kCGGradientDrawsBeforeStartLocation);
    //释放
    CGColorSpaceRelease(colorSpace);
    CGGradientRelease(gradient);
    
    imageView.image = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
}
//扫描成功之后提示音的设置（播放自定义音效文件方法）
-(void)playSound{
    //定义一个SystemSoundID
    SystemSoundID soundID = 1000;//具体参数详情下面贴出来
    //播放声音
    AudioServicesPlaySystemSound(soundID);
}

- (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.
}
*/
#pragma mark-----input---
-(void)inputMessage{
    UIAlertController *alert = [UIAlertController alertControllerWithTitle:@"输入设备编号" message:nil preferredStyle:UIAlertControllerStyleAlert];
    //取消按钮
    [alert addAction:[UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:^(UIAlertAction * _Nonnull action) {
        
    }]];
    //确定按钮
    [alert addAction:[UIAlertAction actionWithTitle:@"确定" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
        UITextField *nameTF = alert.textFields.firstObject;
        NSString *inputText = [nameTF.text stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]];

        if (inputText.length == 0) {
            ALERTSHOW(@"请输入设备编号");
            return ;
        }
        EditLocationVC *editVc = [[EditLocationVC alloc]init];
        editVc.deveceNumber =inputText;
        editVc.deveceName = self.deveceName;
        editVc.typeID = self.typeId;
        [self.navigationController pushViewController:editVc animated:YES];
    }]];
    //定义输入框
    [alert addTextFieldWithConfigurationHandler:^(UITextField * _Nonnull textField) {
        textField.delegate  =self;
        textField.placeholder = @"请手动输入编号";
    }];
    [self presentViewController:alert animated:YES completion:nil];
}
@end