#include "widget.h"
#include "ui_widget.h"
#include "extlist.h"
#include <QSettings>
Widget::Widget(QWidget *parent)
    : QWidget(parent)
    , ui(new Ui::Widget)
{
    ui->setupUi(this);

    setFixedSize(width(), height());

    QSettings settings;
    QVariant sett = settings.value("extTypes", QVariant(QStringList("report")));
    m_exceptTypes = sett.toStringList();

    m_path = QDir::currentPath();
    setWindowTitle(m_path);

    ui->pushButton->setIcon(QIcon(":/res/icons/open-file-48.png"));
    ui->pushButton->setIconSize(QSize(28, 28));
    ui->pushButton->setToolTip("Выбрать папку...");

    ui->progressBar->setValue(0);

    ui->pushButton_2->setEnabled(true);
    ui->pushButton_2->setIcon(QIcon(":/res/icons/start-64.png"));
    ui->pushButton_2->setIconSize(QSize(28,28));
    ui->pushButton_2->setToolTip("Исключения");

    ui->pushButton_3->setEnabled(true);
    ui->pushButton_3->setIcon(QIcon(":/res/icons/save-50.png"));
    ui->pushButton_3->setIconSize(QSize(26, 26));
    ui->pushButton_3->setToolTip("Сохранить");

    ui->pushButton_4->setEnabled(true);
    ui->pushButton_4->setIcon(QIcon(":/res/icons/logout-52.png"));
    ui->pushButton_4->setToolTip("Выход");
    ui->pushButton_4->setIconSize(QSize(26, 22));

    ui->pushButton_5->setEnabled(true);
    ui->pushButton_5->setIcon(QIcon(":/res/icons/loop.png"));
    ui->pushButton_5->setIconSize(QSize(24, 23));
    ui->pushButton_5->setToolTip("Обновить");
    connect(ui->pushButton_5, SIGNAL(clicked()), this, SLOT(calcDir()));

    connect(ui->pushButton_4, SIGNAL(clicked()), this, SLOT(close()));
    connect(ui->comboBox, SIGNAL(currentIndexChanged(int)), this, SLOT(calcDir()));

    // m_exceptTypes.push_back("report");

    QTimer::singleShot(300, this, &Widget::calcDir);
}


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

void Widget::on_pushButton_clicked()
{
    QString dirName = QFileDialog::getExistingDirectory(this, "Выбор папки", m_path);

    if (!dirName.isEmpty()) {
        m_path = dirName;
        setWindowTitle(m_path);
        ui->progressBar->setValue(0);
        QTimer::singleShot(200, this, &Widget::calcDir);
    }
}

void Widget::calcDir() {
    QDir dir(m_path);
    QFileInfoList fileInfoList = dir.entryInfoList(QDir::Files, QDir::Name);

    const int n = fileInfoList.size();

    QJsonObject rootObj;
    QJsonObject filesSet;

    int cnt=0;
    foreach (const QFileInfo& fileInfo, fileInfoList) {
        int curProgress = cnt*100/n;
        ++cnt;
        ui->progressBar->setValue(curProgress);
        QApplication::processEvents();
        QJsonObject fileObj, fileRecord;
        QString filePath = fileInfo.filePath();
        QString createDate = fileInfo.birthTime().toString("hh:mm:ss dd-MMM-yyyy");
        QString lastModifyDate = fileInfo.lastModified().toString("hh:mm:ss dd-MMM-yyyy");
        qint64 fileSize = fileInfo.size();

        QString fileName = fileInfo.fileName();
        bool flagCorrectFile = true;
        foreach (const QString& ext, m_exceptTypes) {
            QString s1 = "." + ext.toLower();
            QString s2 = fileName.right(ext.length()+1).toLower();
            if (s1 == s2) {
                flagCorrectFile = false;
                break;
            }
        }
        if (!flagCorrectFile) continue;

        QString crcString = "NaN";
        qint64 crcValue = 0;
        if (ui->comboBox->currentIndex()==0)         {
            QCryptographicHash hash(QCryptographicHash::Md5);
            QFile file(filePath);
            if (file.open(QIODevice::ReadOnly)) {
                hash.addData(&file);
                file.close();
                crcString = QString(hash.result().toHex());
            }
        }
        if (ui->comboBox->currentIndex()==1) {
            QFile file(filePath);
            if (file.open(QIODevice::ReadOnly)) {
                QByteArray arr = file.readAll();
                file.close();
                crcValue = (qint64)calcCrc32(arr);
                crcString = QString::number(crcValue, 16).toUpper();
                while (crcString.length()<8) crcString.prepend('0');
            }
        }
        // Собираем информацию
        fileObj.insert("Create Date", createDate);
        fileObj.insert("LastModify Date", lastModifyDate);
        fileObj.insert("Size", fileSize);
        fileObj.insert("CRC", crcString );
        rootObj.insert(fileName, fileObj);
    }
    QJsonDocument doc(rootObj);
    QString jsonString = "Количество файлов - " + QString::number(rootObj.count()) + "\n" +
                                                      doc.toJson(QJsonDocument::Indented);
    ui->textEdit->setPlainText(jsonString);
    ui->progressBar->setValue(100);
    m_jDoc.swap(doc);
}
quint32 Widget::calcCrc32(QByteArray &arr) {
    quint32 crc32 = 0xffffffff;
    for(auto x: arr)     {
        crc32 = (crc32 >> 8) ^ CRC32Table[(crc32 ^ x) & 0xff];
    }
    crc32 ^= 0xffffffff;

    return crc32;
}

void Widget::on_pushButton_3_clicked()
{
    QString name = m_path+ "/" +QDateTime::currentDateTime().toString("yyyy-MM-dd_hhmmss")+".report";
    QFile file(name);
    if (!file.open(QIODevice::WriteOnly)) {
        QMessageBox::critical(this, tr("Сохранение отчета"), tr("Ошибка создания файла"));
        return;
    }
    QString data = m_jDoc.toJson(QJsonDocument::Indented);
    file.write(data.toLocal8Bit());
    file.close();
    QMessageBox::information(this, tr("Сохранение отчета"), tr("Файл успешно сохранен\n")+name);
}

void Widget::on_pushButton_2_clicked()
{
    extList dialog(&m_exceptTypes, this);
    auto ret = dialog.exec();
    if (ret != QDialog::Accepted) return;

    QSettings sett;
    const QVariant val(m_exceptTypes);
    sett.setValue("extTypes", val);
    QTimer::singleShot(300, this, SLOT(calcDir()));

}