/*
 * This file is part of the Flowee project
 * Copyright (C) 2011-2015 The Bitcoin Core developers
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef FLOWEE_QT_INTRO_H
#define FLOWEE_QT_INTRO_H

#include <QDialog>
#include <QMutex>
#include <QThread>

class FreespaceChecker;

namespace Ui {
    class Intro;
}

/** Introduction screen (pre-GUI startup).
  Allows the user to choose a data directory,
  in which the wallet and block chain will be stored.
 */
class Intro : public QDialog
{
    Q_OBJECT

public:
    explicit Intro(QWidget *parent = 0);
    ~Intro();

    QString getDataDirectory();
    void setDataDirectory(const QString &dataDir);

    /**
     * Determine data directory. Let the user choose if the current one doesn't exist.
     *
     * @note do NOT call global GetDataDir() before calling this function, this
     * will cause the wrong path to be cached.
     */
    static void pickDataDirectory();

    /**
     * Determine default data directory for operating system.
     */
    static QString getDefaultDataDirectory();

Q_SIGNALS:
    void requestCheck();
    void stopThread();

public Q_SLOTS:
    void setStatus(int status, const QString &message, quint64 bytesAvailable);

private Q_SLOTS:
    void on_dataDirectory_textChanged(const QString &arg1);
    void on_ellipsisButton_clicked();
    void on_dataDirDefault_clicked();
    void on_dataDirCustom_clicked();

private:
    Ui::Intro *ui;
    QThread *thread;
    QMutex mutex;
    bool signalled;
    QString pathToCheck;

    void startThread();
    void checkPath(const QString &dataDir);
    QString getPathToCheck();

    friend class FreespaceChecker;
};

#endif