//
//  ImageUtils.m
//  AntsContract
//
//  Created by Ray on 12/20/16.
//  Copyright © 2016 United Software Applications, Inc. All rights reserved.
//

#import "ImageUtils.h"
#import "AppDelegate.h"

@implementation ImageUtils

+(UIImage*)img_compress:(UIImage*)image kbsize:(float) size
{
    
    
    
    //UIImage *image=[UIImage imageNamed:@"xxoo.jpeg"];
    NSData  *imageData=UIImageJPEGRepresentation(image, 1.f);
    
    if(size>imageData.length/1024)
        return image;
    
    //   CGFloat size=40.f;// kb
    CGFloat scale=size/(imageData.length/1024);
    
    scale = sqrt (scale);
    
    CGSize newsize=image.size;
    newsize.height = newsize.height*scale;
    newsize.width = newsize.width*scale;
    
    return [self scaleImageToSize:image size:newsize];
    //    NSData *newData=UIImageJPEGRepresentation(image, scale);
    
    //    UIImage* ret= [[UIImage alloc] initWithData:newData];
    //
    //    return ret;
}
+ (NSData*) load_cached_img:(NSString*) filename loadFrom:(NSString*) path size:(CGSize)size allow_enlarge:(bool)allow_enlarge
{
    
    NSData* data=[self load_cached_img:filename loadFrom:path];
    
    return data; 
//    UIImage* img = [UIImage imageWithData:data];
//    if(!allow_enlarge&&(size.width>img.size.width|| size.height>img.size.height))
//        return data;
//
//
////    CGRect rect = [self scaleToSize:CGRectMake(0, 0, img.size.width, img.size.height) to:size];
//    UIImage* scaledimg=[self scaleImageToSize:img size:size];
//
//    NSData *scaledData = UIImagePNGRepresentation(scaledimg);
//    return scaledData;
}
+ (NSData*) load_cached_img:(NSString*) filename loadFrom:(NSString*) path
{
    if(path.length==0)
        return nil;
    
    path=[path stringByReplacingOccurrencesOfString:@"https://" withString:@""];
    path=[path stringByReplacingOccurrencesOfString:@"http://" withString:@""];
    //    path=[path stringByReplacingOccurrencesOfString:filename withString:@""];
    
//    AppDelegate *appDelegate = (AppDelegate*)[[UIApplication sharedApplication] delegate];
    
//    if(appDelegate.bEnable_Cache==false)
//        return nil;
    
    
    NSData* data = nil;
    
    
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES);
    NSString *cachefolder = [paths objectAtIndex:0];
    NSString *img_cache = [cachefolder stringByAppendingPathComponent:@"img_cache"];
    NSString *filePath = [img_cache stringByAppendingPathComponent:path];
    
    NSFileManager* fileManager = [NSFileManager defaultManager];
    if(  [fileManager fileExistsAtPath:filePath ])
    {
        data = [NSData dataWithContentsOfFile: filePath];
    }
    return data;
    
}

+ (CGRect)scaleToSize:(CGRect )from to:(CGSize)to
{
    if(from.size.width/from.size.height>to.width/to.height)
    {
        return CGRectMake(from.origin.x, from.origin.y, to.width, to.width*from.size.height/from.size.width);
    }
    else
    {
        return CGRectMake(from.origin.x, from.origin.y, to.height*from.size.width/from.size.height, to.height);
    }
    //    // 创建一个bitmap的context
    //    // 并把它设置成为当前正在使用的context
    //    UIGraphicsBeginImageContext(size);
    //    // 绘制改变大小的图片
    //    [img drawInRect:CGRectMake(0, 0, size.width, size.height)];
    //    // 从当前context中创建一个改变大小后的图片
    //    UIImage* scaledImage = UIGraphicsGetImageFromCurrentImageContext();
    //    // 使当前的context出堆栈
    //    UIGraphicsEndImageContext();
    //    // 返回新的改变大小后的图片
    //
    //    //   NSData  *imageData=UIImageJPEGRepresentation(scaledImage, 1.f);
    //    return scaledImage;
}

+ (UIImage *)scaleImageToSize:(UIImage *)img size:(CGSize)size{
    // 创建一个bitmap的context
    // 并把它设置成为当前正在使用的context
    UIGraphicsBeginImageContext(size);
    // 绘制改变大小的图片
    [img drawInRect:CGRectMake(0, 0, size.width, size.height)];
    // 从当前context中创建一个改变大小后的图片
    UIImage* scaledImage = UIGraphicsGetImageFromCurrentImageContext();
    // 使当前的context出堆栈
    UIGraphicsEndImageContext();
    // 返回新的改变大小后的图片
    
    //   NSData  *imageData=UIImageJPEGRepresentation(scaledImage, 1.f);
    return scaledImage;
}

+ (CGRect)rectAlign:(CGRect )parent rect:(CGRect)rect hAlign:(NSString*)hAlign vAlign:(NSString*)vAlign
{
    //    double cx=parent.origin.x+parent.size.width/2;
    //    double cy=parent.origin.y+parent.size.height/2;
    CGPoint centerpoint= CGPointMake(parent.origin.x+parent.size.width/2,parent.origin.y+parent.size.height/2);
    if([hAlign.lowercaseString isEqualToString:@"center"])
    {
        rect=CGRectMake(centerpoint.x-rect.size.width/2, rect.origin.y, rect.size.width, rect.size.height);
    }
    else
        if([hAlign.lowercaseString isEqualToString:@"left"])
        {
            rect=CGRectMake(parent.origin.x, rect.origin.y, rect.size.width, rect.size.height);
        }
        else
            if([hAlign.lowercaseString isEqualToString:@"right"])
            {
                rect=CGRectMake(parent.origin.x+parent.size.width-rect.size.width, rect.origin.y, rect.size.width, rect.size.height);
            }
    if([vAlign.lowercaseString isEqualToString:@"middle"])
    {
        rect=CGRectMake(rect.origin.x, centerpoint.y-rect.size.height/2, rect.size.width, rect.size.height);
    }
    
    return rect;
    
}

+ (NSData*) load_img:(NSString*) filename
{
    if(filename.length==0)
        return nil;
    
    NSData* data = nil;
//    
//    
//    NSString* tempDir = NSTemporaryDirectory();
//    NSString *filePath = [tempDir stringByAppendingPathComponent:filename];
//    
    NSFileManager* fileManager = [NSFileManager defaultManager];
    if(  [fileManager fileExistsAtPath:filename ])
    {
        data = [NSData dataWithContentsOfFile: filename];
    }
    
    
    return data;
    
}


+(UIImage*)generateBarCode:(NSString*)barCodeStr width:(CGFloat)width height:(CGFloat)height
{
    //return nil;
    // 生成二维码图片
    CIImage *barcodeImage;
    NSData *data = [barCodeStr dataUsingEncoding:NSISOLatin1StringEncoding allowLossyConversion:false];
    CIFilter *filter = [CIFilter filterWithName:@"CICode128BarcodeGenerator"];
    
    [filter setValue:data forKey:@"inputMessage"];
    barcodeImage = [filter outputImage];
    
    // 消除模糊
    CGFloat scaleX = width / barcodeImage.extent.size.width; // extent 返回图片的frame
    CGFloat scaleY = height / barcodeImage.extent.size.height;
    CIImage *transformedImage = [barcodeImage imageByApplyingTransform:CGAffineTransformScale(CGAffineTransformIdentity, scaleX, scaleY)];
    CIContext *context = [CIContext contextWithOptions:nil];
    CGImageRef cgImage = [context createCGImage:transformedImage fromRect:[transformedImage extent]];
    
    UIImage* ret = [UIImage imageWithCGImage:cgImage];
    
    
    CGImageRelease(cgImage);
    
    return ret;
    
}
+(NSString*)generateBarCodeFile:(NSString*)barCodeStr width:(CGFloat)width height:(CGFloat)height
{
    UIImage* img = [self generateBarCode:barCodeStr width:width height:height];
    NSString* qrpath=nil;
    NSString* temp = NSTemporaryDirectory();
    NSString* filename =[NSString stringWithFormat:@"%@.png", [[NSUUID UUID] UUIDString]];
    qrpath=[temp stringByAppendingPathComponent:filename];
    
    [UIImagePNGRepresentation(img)writeToFile: qrpath    atomically:YES];
    return qrpath;
}
+(NSString*)generateQRCodeFile:(NSString*)barCodeStr width:(CGFloat)width height:(CGFloat)height
{
    
    UIImage* img = [self generateQRCode:barCodeStr width:width height:height];
    NSString* qrpath=nil;
    NSString* temp = NSTemporaryDirectory();
    NSString* filename =[NSString stringWithFormat:@"%@.png", [[NSUUID UUID] UUIDString]];
    qrpath=[temp stringByAppendingPathComponent:filename];
    
    [UIImagePNGRepresentation(img)writeToFile: qrpath    atomically:YES];
    return qrpath;
}
+(UIImage*)generateQRCode:(NSString*)barCodeStr width:(CGFloat)width height:(CGFloat)height
{
    {
        // 生成二维码图片
        CIImage *barcodeImage;
        NSData *data = [barCodeStr dataUsingEncoding:NSISOLatin1StringEncoding allowLossyConversion:false];
        CIFilter *filter = [CIFilter filterWithName:@"CIQRCodeGenerator"];
        
        [filter setValue:data forKey:@"inputMessage"];
        barcodeImage = [filter outputImage];
        
        // 消除模糊
        CGFloat scaleX = width / barcodeImage.extent.size.width; // extent 返回图片的frame
        CGFloat scaleY = height / barcodeImage.extent.size.height;
        CIImage *transformedImage = [barcodeImage imageByApplyingTransform:CGAffineTransformScale(CGAffineTransformIdentity, scaleX, scaleY)];
        
        CIContext *context = [CIContext contextWithOptions:nil];
        CGImageRef cgImage = [context createCGImage:transformedImage fromRect:[transformedImage extent]];
        
        UIImage* ret = [UIImage imageWithCGImage:cgImage];
        
        
        CGImageRelease(cgImage);
        
        return ret;
        
    }
}
@end