#include "mainwindow.h"
#include "ui_mainwindow.h"

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    iconInit();
}

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

void MainWindow::on_pushButton_choose_clicked()
{
    char * strhome = getenv("HOME");
    QString strsavepath;
    strsavepath = strhome;
    strsavepath = strsavepath + "/log";
    QDir dir(strsavepath);

    if(!dir.exists())
        strsavepath = getenv("HOME");

    mfile_path = QFileDialog::getOpenFileName(this, tr("Selecte file to uncompress"),strsavepath);
    ui->lineEdit->setText(mfile_path);
}

void MainWindow::on_pushButton_start_clicked()
{
    fileUncompress(mfile_path);
}

void MainWindow::fileUncompress(QString _filename)
{
    QString filename_uncomp = _filename + ".log";//compressed file name
    QFile file(_filename);
    if(file.exists()){
        qDebug() << "brefore compressed file size:" << file.size();
        bool ok = file.open(QIODevice::ReadOnly);
        if(ok){
            QByteArray buffer = file.readAll();
            QFile writeFile(filename_uncomp);
            ok = writeFile.open(QIODevice::WriteOnly);
            if(ok){
                //uncompress
                ui->progressBar->setValue(10);
                qDebug() <<QTime::currentTime();
                buffer = qUncompress(buffer);
                ui->progressBar->setValue(50);
                qDebug() <<QTime::currentTime()  << "after uncompressed buffer size:" << buffer.size();
                writeFile.write(buffer);
                ui->progressBar->setValue(100);
                qDebug() << QTime::currentTime()<< "after compressed file size:" << writeFile.size();
            }
            writeFile.close();
        }
    }
}

void MainWindow::iconInit()
{
    //添加提示信息
    ui->pushButton_choose->setToolTip(tr("Choose file to uncompress"));
    //设置icon图片
    QIcon icon;
    icon.addFile(":icon/compress.svg",QSize(),QIcon::Normal, QIcon::On);
    setWindowIcon(icon);
}