/**
 * @file ScosTime/gui.cpp
 * @brief GUI for the ScosTime application
 * @author Enar Vaikene
 *
 * Copyright (c) 2012 Enar Vaikene
 *
 * This file is part of the eVaf C++ cross-platform application development framework.
 *
 * This file can be used under the terms of the GNU General Public License
 * version 3.0 as published by the Free Software Foundation and appearing in
 * the file LICENSE included in the packaging of this file. Please review the
 * the following information to ensure the GNU General Public License version
 * 3.0 requirements will be met: http://www.gnu.org/copyleft/gpl.html.
 *
 * Alternatively, this file may be used in accordance with the Commercial License
 * Agreement provided with the Software.
 */

#include "gui.h"

#include <Common/Globals>
#include <Common/iLogger>
#include <Common/iRegistry>
#include <SdiWindow/iSdiWindow>
#include <Gui/Panel>

#include <QtWidgets>


VER_EXPORT_VERSION_INFO()


//-------------------------------------------------------------------

using namespace eVaf;
using namespace eVaf::ScosTime;

Module::Module()
    : Plugins::iPlugin()
    , mReady(false)
{
    setObjectName(QString("%1.%2").arg(VER_MODULE_NAME_STR).arg(__FUNCTION__));

    EVAF_INFO("%s created", qPrintable(objectName()));
}

Module::~Module()
{
    EVAF_INFO("%s destroyed", qPrintable(objectName()));
}

bool Module::init(QString const & args)
{
    Q_UNUSED(args);

    // Get the main window interface and fill it with the widgets
    SdiWindow::iSdiWindow * win = evafQueryInterface<SdiWindow::iSdiWindow>("iSdiWindow");
    EVAF_TEST_X(win, "No iSdiWindow interface");

    Gui::Panel * panel = new Gui::Panel;
    win->addPanel("PswGen", panel);

    QVBoxLayout * v = new QVBoxLayout;
    panel->setLayout(v);

    QGridLayout * g = new QGridLayout;
    v->addLayout(g);
    g->setColumnStretch(1, 2);

    QLabel * l = new QLabel(tr("&Epoch:", VER_MODULE_NAME_STR));
    l->setAlignment(Qt::AlignRight | Qt::AlignVCenter);
    g->addWidget(l, 0, 0);

    wEpoch = new QComboBox;
    l->setBuddy(wEpoch);
    wEpoch->setEditable(true);
    wEpoch->addItems(QStringList() << "1970-01-01T00:00:00.000" << "1999-08-22T00:00:00.000");
    g->addWidget(wEpoch, 0, 1);
    panel->setFocusProxy(wEpoch);

    l = new QLabel(tr("&Date/time:", VER_MODULE_NAME_STR));
    l->setAlignment(Qt::AlignRight | Qt::AlignVCenter);
    g->addWidget(l, 1, 0);

    wDateTime = new QLineEdit;
    l->setBuddy(wDateTime);
    QRegExp rxDateTime("^\\d{4}\\.\\d{3}\\.\\d{2}\\.\\d{2}\\.\\d{2}(\\.\\d{3})?$");
    wDateTime->setValidator(new QRegExpValidator(rxDateTime, wDateTime));
    g->addWidget(wDateTime, 1, 1);

    QPushButton * btn = new QPushButton(tr("Convert", VER_MODULE_NAME_STR));
    g->addWidget(btn, 1, 2);
    connect(btn, SIGNAL(clicked()), this, SLOT(dateTimeClicked()));

    l = new QLabel(tr("&HEX:", VER_MODULE_NAME_STR));
    l->setAlignment(Qt::AlignRight | Qt::AlignVCenter);
    g->addWidget(l, 2, 0);

    wHex = new QLineEdit;
    l->setBuddy(wHex);
    wHex->setMaxLength(12);
    wHex->setInputMask(">HHHHHHHHhhhh");
    g->addWidget(wHex, 2, 1);

    btn = new QPushButton(tr("Convert", VER_MODULE_NAME_STR));
    g->addWidget(btn, 2, 2);
    connect(btn, SIGNAL(clicked()), this, SLOT(hexClicked()));

    v->addStretch();

    QHBoxLayout * h = new QHBoxLayout;
    h->addStretch();
    v->addLayout(h);

    QAction * a = new QAction(panel);
    a->setShortcut(Qt::Key_Escape);
    connect(a, SIGNAL(triggered()), qApp, SLOT(quit()));
    panel->addAction(a);

    mReady = true;

    EVAF_INFO("%s initialized", qPrintable(objectName()));

    return true;
}

void Module::done()
{
    mReady = false;

    EVAF_INFO("%s finalized", qPrintable(objectName()));
}

QDateTime Module::strToDateTime(QString const & s) const
{
    QStringList tok = s.split(QChar('.'));
    if (tok.size() < 5)
        return QDateTime();

    bool ok = false;
    int year = tok.at(0).toInt(&ok);
    if (!ok)
        return QDateTime();
    int days = tok.at(1).toInt(&ok);
    if (!ok)
        return QDateTime();
    int hours = tok.at(2).toInt(&ok);
    if (!ok)
        return QDateTime();
    int minutes = tok.at(3).toInt(&ok);
    if (!ok)
        return QDateTime();
    int secs = tok.at(4).toInt(&ok);
    if (!ok)
        return QDateTime();
    int msecs = 0;
    if (tok.size() > 5) {
        msecs = tok.at(5).toInt(&ok);
        if (!ok)
            return QDateTime();
    }

    QDate dt(year, 1, 1);
    dt = dt.addDays(days - 1);

    return QDateTime(dt, QTime(hours, minutes, secs, msecs), Qt::UTC);
}

void Module::dateTimeClicked()
{
    QDateTime epoch = QDateTime::fromString(wEpoch->currentText(), Qt::ISODate);
    epoch.setTimeSpec(Qt::UTC);
    QDateTime tm = strToDateTime(wDateTime->text());
    qint64 msecs = epoch.msecsTo(tm);
    quint32 coarse = quint32(msecs / 1000);
    quint32 fine = quint32(rint(1000.0 * double(msecs % 1000) * 58.0 / 885.0));
    wHex->setText(QString("%1%2").arg(coarse, 8, 16, QChar('0')).arg(fine, 4, 16, QChar('0')));
}

void Module::hexClicked()
{
    bool ok = false;
    int coarse = wHex->text().left(8).toLong(&ok, 16);
    if (!ok)
        return;
    int fine = 0;
    if (wHex->text().size() > 8)
        fine = wHex->text().mid(8, 4).toLong(&ok, 16);
    if (!ok)
        return;

    QDateTime epoch = QDateTime::fromString(wEpoch->currentText(), Qt::ISODate);
    epoch.setTimeSpec(Qt::UTC);
    QDateTime tm = epoch.addSecs(coarse);
    tm = tm.addMSecs(rint((double(fine) / 58.0 * 885.0) / 1000.0));
    wDateTime->setText(QString("%1.%2.%3.%4.%5.%6")
                       .arg(tm.date().year(), 4, 10, QChar('0'))
                       .arg(tm.date().dayOfYear(), 3, 10, QChar('0'))
                       .arg(tm.time().hour(), 2, 10, QChar('0'))
                       .arg(tm.time().minute(), 2, 10, QChar('0'))
                       .arg(tm.time().second(), 2, 10, QChar('0'))
                       .arg(tm.time().msec(), 3, 10, QChar('0')));
}