/*****************************************************************************************
 *                                                                                       *
 * OpenSpace                                                                             *
 *                                                                                       *
 * Copyright (c) 2014-2015                                                               *
 *                                                                                       *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of this  *
 * software and associated documentation files (the "Software"), to deal in the Software *
 * without restriction, including without limitation the rights to use, copy, modify,    *
 * merge, publish, distribute, sublicense, and/or sell copies of the Software, and to    *
 * permit persons to whom the Software is furnished to do so, subject to the following   *
 * conditions:                                                                           *
 *                                                                                       *
 * The above copyright notice and this permission notice shall be included in all copies *
 * or substantial portions of the Software.                                              *
 *                                                                                       *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,   *
 * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A         *
 * PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT    *
 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF  *
 * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE  *
 * OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                                         *
 ****************************************************************************************/

#include "controlwidget.h"

#include <QComboBox>
#include <QGridLayout>
#include <QHBoxLayout>
#include <QLabel>
#include <QPushButton>
#include <QSlider>

namespace {
    struct ImportantDate {
        QString date;
        QString focus;
        QString coordinateSystem;
    };

    const ImportantDate ImportantDates[] = {
        { "2007-02-27T16:40:00.00", "JupiterProjection", "Jupiter" },
        { "2015-07-14T10:10:00.00", "PlutoProjection", "Pluto" },
        { "2015-07-14T10:50:00.00", "PlutoProjection", "Pluto" },
        { "2015-07-14T11:22:00.00", "PlutoProjection", "Pluto" },
        { "2015-07-14T11:36:40.00", "PlutoProjection", "Pluto" },
        { "2015-07-14T11:48:43.00", "PlutoProjection", "Pluto" },
        { "2015-07-14T12:04:35.00", "PlutoProjection", "Pluto" },
        { "2015-07-14T15:02:46.00", "PlutoProjection", "Pluto" }
    };

    struct FocusNode {
        QString guiName;
        QString name;
        QString coordinateSystem;
    };
    const FocusNode FocusNodes[] = {
        { "Earth", "Earth", "Sun" },
        { "Sun", "Sun", "Sun" },
        { "Pluto", "PlutoProjection", "Pluto" },
        { "Charon", "Charon", "Pluto" },
        { "Jupiter", "JupiterProjection", "Jupiter" },
        { "New Horizons", "NewHorizons", "" },
        { "Nix", "Nix", "Pluto" },
        { "Kerberos", "Kerberos", "Pluto" },
        { "Hydra", "Hydra", "Pluto" },
    };
}

ControlWidget::ControlWidget(QWidget* parent)
    : QWidget(parent)
    , _currentTime(new QLabel("Current Time"))
    , _setTime(new QComboBox)
    , _currentDelta(new QLabel("Current Delta"))
    , _setDelta(new QSlider(Qt::Horizontal))
    , _rewind(new QPushButton("<<"))
    , _pause(new QPushButton("||"))
    , _play(new QPushButton("|>"))
    , _forward(new QPushButton(">>"))
    , _focusNode(new QComboBox)
{
    for (const ImportantDate& d : ImportantDates)
        _setTime->addItem(d.date);
    QObject::connect(
        _setTime,
        SIGNAL(currentIndexChanged(int)),
        this,
        SLOT(onDateChange())
    );

    for (const FocusNode& f : FocusNodes)
        _focusNode->addItem(f.guiName);
    QObject::connect(
        _focusNode,
        SIGNAL(currentIndexChanged(int)),
        this,
        SLOT(onFocusChange())
    );

    _setDelta->setMinimum(-100);
    _setDelta->setMaximum(100);
    _setDelta->setValue(0);
    QObject::connect(
        _setDelta,
        SIGNAL(valueChanged(int)),
        this,
        SLOT(onValueChange())
    );

    QObject::connect(
        _rewind,
        SIGNAL(clicked()),
        this,
        SLOT(onRewindButton())
    );

    QObject::connect(
        _pause,
        SIGNAL(clicked()),
        this,
        SLOT(onPauseButton())
    );

    QObject::connect(
        _play,
        SIGNAL(clicked()),
        this,
        SLOT(onPlayButton())
    );

    QObject::connect(
        _forward,
        SIGNAL(clicked()),
        this,
        SLOT(onForwardButton())
    );

    QGridLayout* layout = new QGridLayout;

    layout->addWidget(_currentTime, 0, 0);
    layout->addWidget(_setTime, 0, 1);
    layout->addWidget(_currentDelta, 1, 0);
    layout->addWidget(_setDelta, 2, 0, 1, 2);

    QWidget* controlContainer = new QWidget;
    QHBoxLayout* controlContainerLayout = new QHBoxLayout;
    controlContainerLayout->addWidget(_rewind);
    controlContainerLayout->addWidget(_pause);
    controlContainerLayout->addWidget(_play);
    controlContainerLayout->addWidget(_forward);
    controlContainer->setLayout(controlContainerLayout);
    layout->addWidget(controlContainer, 3, 0, 1, 2);

    layout->addWidget(_focusNode, 4, 0, 1, 2);

    setLayout(layout);
}

void ControlWidget::update(QString currentTime, QString currentDelta) {
    _currentTime->setText(currentTime);
    _currentDelta->setText(currentDelta);
}

void ControlWidget::onValueChange() {
    float value = static_cast<float>(_setDelta->value());

    int delta;
    if (value < 0.f) {
        value = -value;
        float d = std::pow(2, value / 10);
        delta = static_cast<int>(-d);
    }
    else {
        float d = std::pow(2, value / 10);
        delta = static_cast<int>(d);
    }
    
    QString script = "openspace.time.setDeltaTime(" + QString::number(delta) + ");";
    emit scriptActivity(script);
}

void ControlWidget::onRewindButton() {
    QString script = "openspace.time.setDeltaTime(-openspace.time.deltaTime());";
    emit scriptActivity(script);
}

void ControlWidget::onPauseButton() {
    QString script = "openspace.time.setPause(true);";
    emit scriptActivity(script);
}

void ControlWidget::onPlayButton() {
    QString script = "openspace.time.setPause(false);";
    emit scriptActivity(script);
}

void ControlWidget::onForwardButton() {
    QString script = "openspace.time.setDeltaTime(-openspace.time.deltaTime());";
    emit scriptActivity(script);

}

void ControlWidget::onDateChange() {
    int index = _setTime->currentIndex();
    QString date = ImportantDates[index].date;
    QString focus = ImportantDates[index].focus;
    QString coordinateSystem = ImportantDates[index].coordinateSystem;
    QString script =
        "openspace.time.setTime('" + date + "');\
         openspace.setOrigin('" + focus + "');\
         openspace.changeCoordinateSystem('" + coordinateSystem + "');";
    emit scriptActivity(script);
}

void ControlWidget::onFocusChange() {
    int index = _focusNode->currentIndex();
    QString name = FocusNodes[index].name;
    QString coordinateSystem = FocusNodes[index].coordinateSystem;
    if (coordinateSystem.isEmpty()) {
        int date = _currentTime->text().left(4).toInt();
        if (date < 2008)
            coordinateSystem = "Jupiter";
        else if (date < 2014)
            coordinateSystem = "Sun";
        else
            coordinateSystem = "Pluto";

    }
    QString script = "openspace.setOrigin('" + name + "');openspace.changeCoordinateSystem('" + coordinateSystem + "');";
    emit scriptActivity(script);
}

void ControlWidget::socketConnected() {
    setDisabled(false);
}

void ControlWidget::socketDisconnected() {
    setDisabled(true);
}