#include "downloaddialog.h"
#include "ui_downloaddialog.h"
#include <QTime>
#include "helpers.h"

downloadDialog::downloadDialog(QWidget *parent, QString src, QString tgt):
  QDialog(parent),
  ui(new Ui::downloadDialog),
  file(NULL)
{
    ui->setupUi(this);
    setWindowIcon(CompanionIcon("fwpreferences.png"));
    ui->progressBar->setValue(1);
    ui->progressBar->setMinimum(0);
    ui->progressBar->setMaximum(0);

    if (tgt.isEmpty()) {
      setWindowTitle(src);
      return;  // just show wait dialog.
    }

    file = new QFile(tgt);
    if (!file->open(QIODevice::WriteOnly)) {
      QMessageBox::critical(this, "Companion",
          tr("Unable to save the file %1: %2.")
          .arg(tgt).arg(file->errorString()));
      QTimer::singleShot(0, this, SLOT(fileError()));
    }
    else {
      reply = qnam.get(QNetworkRequest(QUrl(src)));
      connect(reply, SIGNAL(finished()), this, SLOT(httpFinished()));
      connect(reply, SIGNAL(readyRead()), this, SLOT(httpReadyRead()));
      connect(reply, SIGNAL(downloadProgress(qint64,qint64)), this, SLOT(updateDataReadProgress(qint64,qint64)));
    }
}

downloadDialog::~downloadDialog()
{
  delete ui;
  delete file;
}

void downloadDialog::httpFinished()
{
    file->flush();
    file->close();

    bool ok = true;
    if (reply->error()) {
        file->remove();
        QMessageBox::information(this, tr("Companion"),
                                 tr("Download failed: %1.")
                                 .arg(reply->errorString()));
        ok = false;
    }

    reply->deleteLater();
    reply = 0;
    delete file;
    file = NULL;

    if (ok)
      accept();
    else
      reject();
}

void downloadDialog::httpReadyRead()
{
  if (file) {
    file->write(reply->readAll());
  }
}

void downloadDialog::updateDataReadProgress(qint64 bytesRead, qint64 totalBytes)
{
  ui->progressBar->setMaximum(totalBytes);
  ui->progressBar->setValue(bytesRead);
}

void downloadDialog::fileError()
{
  delete file;
  file = NULL;
  reject();
}

#if 0
void downloadDialog::closeEvent( QCloseEvent * event)
{
  // Delay closing 2 seconds to avoid unpleasant flashing download dialogs
  QTime closeTime= QTime::currentTime().addSecs(2);
  while( QTime::currentTime() < closeTime )
    QCoreApplication::processEvents(QEventLoop::AllEvents, 100);   

  event->accept();
}
#endif