#include <stdio.h>
#include <stdlib.h>

#include <QImage>
#include <getopt.h>
#include <qrencode.h>
#include <qdebug.h>
#include "mainwindow.h"
#include <QApplication>
#include "ui_mainwindow.h"

char *intext = "                             ";
static int casesensitive = 0;
static int eightbit = 0;
static int kanji = 0;
static int version = 0;
static int Size = 3;
static int margin = 4;
static QRecLevel level = QR_ECLEVEL_L;

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    ui->textEdit->setText(tr("1234567893233695"));
}

MainWindow::~MainWindow()
{
    delete ui;
}

enum {
    O_HELP,
    O_OUTPUT,
    O_SIZE,
    O_VERSION,
    O_LEVEL,
    O_MARGIN,
    O_KANJI,
    O_CASE,
    O_8BIT,
};

static const struct option options[] = {
    {"h", no_argument      , NULL, O_HELP},
    {"o", required_argument, NULL, O_OUTPUT},
    {"l", required_argument, NULL, O_LEVEL},
    {"s", required_argument, NULL, O_SIZE},
    {"v", required_argument, NULL, O_VERSION},
    {"m", required_argument, NULL, O_MARGIN},
    {"k", no_argument      , NULL, O_KANJI},
    {"c", no_argument      , NULL, O_CASE},
    {"8", no_argument      , NULL, O_8BIT},
    {NULL, 0, NULL, 0}
};

static void usage(void)
{
    qDebug()<<(
"qrencode version %s\n\n"
"Usage: qrencode [OPTION]... [STRING]\n"
"Encode input data in a QR Code and save as a PNG image.\n\n"
"  -h           display this message.\n"
"  -o FILENAME  write PNG image to FILENAME. If '-' is specified, the result\n"
"               will be output to standard output.\n"
"  -s NUMBER    specify the size of dot (pixel). (default=3)\n"
"  -l {LMQH}    specify error collectin level from L (lowest) to H (highest).\n"
"               (default=L)\n"
"  -v NUMBER    specify the version of the symbol. (default=auto)\n"
"  -m NUMBER    specify the width of margin. (default=4)\n"
"  -k           assume that the input text contains kanji (shift-jis).\n"
"  -c           encode alphabet characters in 8-bit mode. If your application\n"
"               is case-sensitive, choose this.\n"
"  -8           encode entire data in 8-bit mode. -c and -k will be ignored.\n"
"  [STRING]     input data. If it is not specified, data will be taken from\n"
"               standard input.\n"
    );
}

#define MAX_DATA_SIZE 7090 /* from the specification */
static char *readStdin(void)
{
    char *buffer;
    int ret;

    buffer = (char *)malloc(MAX_DATA_SIZE);
    ret = fread(buffer, 1, MAX_DATA_SIZE, stdin);
    if(ret == 0) {
        fprintf(stderr, "No input data.\n");
        exit(1);
    }
    if(!feof(stdin)) {
        fprintf(stderr, "Input data is too large.\n");
        exit(1);
    }

    buffer[ret] = '\0';

    return buffer;
}

static QRcode *encode(const char *intext)
{
    QRencodeMode hint;
    QRcode *code;

    if(kanji) {
        hint = QR_MODE_KANJI;
    } else {
        hint = QR_MODE_8;
    }

    if(eightbit) {
        code = QRcode_encodeString8bit(intext, version, level);
    } else {
        code = QRcode_encodeString(intext, version, level, hint, casesensitive);
    }

    return code;
}

  static void qrencode(const char *intext, const char *outfile)
{
    FILE *fp;
    QRcode *qrcode;
    //png_structp png_ptr;
    //png_infop info_ptr;
    unsigned char *row, *p, *q;
    int x, y, xx, yy, bit;
    int realwidth;

    qrcode = encode(intext);
    if(qrcode == NULL) {
        fprintf(stderr, "Failed to encode the input data.\n");
        exit(1);
    }

    realwidth = (qrcode->width + margin * 2) * Size;

    row = (unsigned char *)malloc(realwidth);

  //   top margin
    memset(row, 0x0, realwidth );

    qDebug()<<"1: "<< qrcode->width<<realwidth<<margin<<Size<<sizeof(intext);

    // realwidth = (qrcode->width + margin * 2) * Size;
    QImage QRImage(realwidth,qrcode->width*Size,QImage::Format_ARGB32 );
    QImage *img;
    img = &QRImage;
    img->fill(0x00ffffff);

    /* data */
    p = qrcode->data;
    int ypos=0;//margin * Size;
    int xpos=0;
    for(y=0; y<qrcode->width; y++) {
        bit = 7;        
        bit = 7 - (margin * Size % 8);
        xpos=margin * Size;
        for(x=0; x<qrcode->width; x++) {
            for(xx=0; xx<Size; xx++) {
                if((*p & 1) << bit){
                   for(yy=0; yy<Size; yy++) {
                       img->setPixel(xpos,ypos+yy,0xff000000);
                   }
                }
                xpos++;

            }
            p++;
            bit--;
            if(bit < 0) {
                //q++;
                bit = 7;
            }
        }
        ypos+=Size;
    }
    img->save("Myqr.bmp");

    free(row);
    QRcode_free(qrcode);
}


 void MainWindow::on_pushButton_clicked()
 {
    QString in;
    //usage();
    in = ui->textEdit->toPlainText();
    //intext = in.toLatin1().data();
    intext =  (char *)malloc(in.length()*2);
    memset(intext,0,sizeof(intext));
    //intext =in.unicode();
    //memcpy(&intext[0], in.unicode (),2*in.length());
    memcpy(intext,in.toLocal8Bit().data(),2*in.length());

    qDebug()<<in<< intext;
    Size = ui->comboBox_size->currentIndex()+3;
    qrencode(intext,outfile);
    QImage img("Myqr.bmp",0);
    ui->labQRImage->setPixmap( QPixmap::fromImage(img,Qt::AutoColor));
 }

int main(int argc, char **argv)
{

    QApplication a(argc, argv);
    MainWindow w;
    w.show();
    return a.exec();
}