#include "pdf_comic.h"

#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
#undef __OBJC_BOOL_IS_BOOL
#endif

#import <AppKit/AppKit.h>
#import <Foundation/Foundation.h>
#import <ApplicationServices/ApplicationServices.h>

#include "QsLog.h"
#include "QsLogDest.h"

MacOSXPDFComic::MacOSXPDFComic()
{
}

MacOSXPDFComic::~MacOSXPDFComic()
{
    CGPDFDocumentRelease((CGPDFDocumentRef)document);
}

bool MacOSXPDFComic::openComic(const QString &path)
{

    CFURLRef pdfFileUrl;
    CFStringRef str;
    str = CFStringCreateWithCString(kCFAllocatorDefault, path.toUtf8().data(), kCFStringEncodingUTF8);
    pdfFileUrl = CFURLCreateWithFileSystemPath(kCFAllocatorDefault, str, kCFURLPOSIXPathStyle, true);

    CGPDFDocumentRef pdf = CGPDFDocumentCreateWithURL((CFURLRef)pdfFileUrl);

    document = pdf;

    CFRelease(str);
    CFRelease(pdfFileUrl);

    return true;
}

void MacOSXPDFComic::closeComic()
{
    // CGPDFDocumentRelease((CGPDFDocumentRef)document);
}

unsigned int MacOSXPDFComic::numPages()
{
    return (int)CGPDFDocumentGetNumberOfPages((CGPDFDocumentRef)document);
}

QImage MacOSXPDFComic::getPage(const int pageNum)
{
    CGPDFPageRef page = CGPDFDocumentGetPage((CGPDFDocumentRef)document, pageNum + 1);
    // Changed this line for the line above which is a generic line
    // CGPDFPageRef page = [self getPage:page_number];

    CGRect pageRect = CGPDFPageGetBoxRect(page, kCGPDFMediaBox);
    int width = 1200;

    // NSLog(@"-----%f",pageRect.size.width);
    CGFloat pdfScale = float(width) / pageRect.size.width;

    pageRect.size = CGSizeMake(pageRect.size.width * pdfScale, pageRect.size.height * pdfScale);
    pageRect.origin = CGPointZero;

    CGColorSpaceRef genericColorSpace = CGColorSpaceCreateDeviceRGB();

    QImage renderImage = QImage(pageRect.size.width, pageRect.size.height, QImage::Format_ARGB32_Premultiplied);

    CGContextRef bitmapContext = CGBitmapContextCreate(renderImage.scanLine(0),
                                                       pageRect.size.width,
                                                       pageRect.size.height,
                                                       8, renderImage.bytesPerLine(),
                                                       genericColorSpace,
                                                       kCGImageAlphaPremultipliedFirst | kCGBitmapByteOrder32Little // may need to be changed to kCGBitmapByteOrder32Big
    );

    CGContextSetInterpolationQuality(bitmapContext, kCGInterpolationHigh);
    CGContextSetRenderingIntent(bitmapContext, kCGRenderingIntentDefault);
    CGContextSetRGBFillColor(bitmapContext, 1.0, 1.0, 1.0, 1.0);
    CGContextFillRect(bitmapContext, CGContextGetClipBoundingBox(bitmapContext));

    // CGContextTranslateCTM( bitmapContext, 0, pageRect.size.height );
    // CGContextScaleCTM( bitmapContext, 1.0, -1.0 );

    CGContextConcatCTM(bitmapContext, CGAffineTransformMakeScale(pdfScale, pdfScale));

    /*CGAffineTransform pdfXfm = CGPDFPageGetDrawingTransform( page, kCGPDFMediaBox, CGRectMake(pageRect.origin.x, pageRect.origin.y, pageRect.size.width, pageRect.size.height) , 0, true );
     */
    // CGContextConcatCTM( bitmapContext, pdfXfm );

    CGContextDrawPDFPage(bitmapContext, page);

    // CGImageRef image = CGBitmapContextCreateImage(bitmapContext);

    // QImage qtImage;

    // CFDataRef dataRef = CGDataProviderCopyData(CGImageGetDataProvider(image));

    /*lastPageData = (void *)dataRef;

    if(!lastPageData)
    {
        QLOG_ERROR() << "Unable to extract image from PDF file using CGPDFDocument";
        CGImageRelease(image);
        CGContextRelease(bitmapContext);
        CGColorSpaceRelease(genericColorSpace);
        return QImage();
    }

    const uchar *bytes = (const uchar *)CFDataGetBytePtr(dataRef);

    qtImage = QImage(bytes, pageRect.size.width, pageRect.size.height, QImage::Format_ARGB32);
    */
    // CGImageRelease(image);
    // CFRelease(dataRef);
    CGContextRelease(bitmapContext);
    // CGPDFPageRelease(page);
    CGColorSpaceRelease(genericColorSpace);

    // return qtImage;
    return renderImage;
}

/*void MacOSXPDFComic::releaseLastPageData()
{
    CFRelease((CFDataRef)lastPageData);
}*/