#include "adjustpicturedialog.h"
#include "ui_adjustpicturedialog.h"
#include "utils/utils.h"
#include <opencv2/imgcodecs.hpp>
#include <opencv2/imgproc.hpp>
#include <string>
#include <iostream>
#include <opencv2/core/mat.hpp>
#include <QFileDialog>
#include <QMessageBox>
#include <zbar.h>

AdjustPictureDialog::AdjustPictureDialog(QWidget *parent, std::string imagePath)
    : QDialog(parent)
    , ui(new Ui::AdjustPictureDialog){
    ui->setupUi(this);

    scene = new QGraphicsScene(this);

    ui->graphicsView->setScene(scene);
    QGraphicsPixmapItem p;
    QString path = QString::fromStdString(imagePath);
    QPixmap pixmap = QPixmap(path);
    scene->addPixmap(pixmap);
}

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

void AdjustPictureDialog::accept() {
    QPixmap pixMap = ui->graphicsView->grab();
    pixMap.save(QString::fromStdString(get_path_relative_to_home(".local/share/checks_parser/temp.png")));

    std::string result = decode();

    if (result == "") {
        QMessageBox infoDialog;
        infoDialog.setText("QR code was not detected on that image. Please edit it again or enter data manually");
        infoDialog.setIcon(QMessageBox::Warning);
        infoDialog.setWindowTitle("No QR code");
        infoDialog.exec();
    } else {
        emit decodedData(result);
        QDialog::accept();
    }

}

std::string AdjustPictureDialog::decode() {
    cv::Mat im = cv::imread(get_path_relative_to_home(".local/share/checks_parser/temp.png"));

    zbar::ImageScanner scanner;
    scanner.set_config(zbar::ZBAR_QRCODE, zbar::ZBAR_CFG_ENABLE, 1);
    scanner.set_config(zbar::ZBAR_QRCODE, zbar::ZBAR_CFG_TEST_INVERTED, 1);

    cv::Mat imGray;
    cv::cvtColor(im, imGray, cv::COLOR_BGR2GRAY);

    zbar::Image image(im.cols, im.rows, "Y800", (uchar *) imGray.data, im.cols * im.rows);
    int n = scanner.scan(image);

    std::string result = "";

    for (zbar::Image::SymbolIterator symbol = image.symbol_begin(); symbol != image.symbol_end(); ++symbol) {
        result = symbol->get_data();
    }



    return result;
}