/*
 *   Copyright 2018 Camilo Higuita <milo.h@aol.com>
 *
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU Library General Public License as
 *   published by the Free Software Foundation; either version 2, 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 Library General Public
 *   License along with this program; if not, write to the
 *   Free Software Foundation, Inc.,
 *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */

#include "handy.h"
#include "fmh.h"

#include <QDateTime>
#include <QClipboard>
#include <QDebug>
#include <QIcon>
#include <QMimeData>
#include <QOperatingSystemVersion>
#include <QStandardPaths>
#include <QWindow>
#include <QMouseEvent>
#include <QRegularExpression>
#include <QInputDevice>
#include <QFileInfo>

#ifdef Q_OS_ANDROID
#include <QGuiApplication>
#else
#include <QApplication>
#endif

#include <MauiMan4/formfactormanager.h>
#include <MauiMan4/accessibilitymanager.h>
#include <MauiMan4/mauimanutils.h>

Q_GLOBAL_STATIC(Handy, handyInstance)

Handy::Handy(QObject *parent)
    : QObject(parent)
    ,m_formFactor(new MauiMan::FormFactorManager(this))
    ,m_accessibility(new MauiMan::AccessibilityManager(this))
    ,m_hasTransientTouchInput(false)
{
    qDebug() << "CREATING INSTANCE OF MAUI HANDY";
    
    connect(m_accessibility, &MauiMan::AccessibilityManager::singleClickChanged, [&](bool value)
            {
                m_singleClick = value;
                Q_EMIT singleClickChanged();
            });
    
    m_singleClick = m_accessibility->singleClick();
    
    // #ifdef FORMFACTOR_FOUND //TODO check here for Cask desktop enviroment
    
    connect(m_formFactor, &MauiMan::FormFactorManager::preferredModeChanged, [this](uint value)
            {
                m_ffactor = static_cast<FFactor>(value);
                m_mobile = m_ffactor == FFactor::Phone || m_ffactor == FFactor::Tablet;
                Q_EMIT formFactorChanged();
                Q_EMIT isMobileChanged();
            });
    
    connect(m_formFactor, &MauiMan::FormFactorManager::hasTouchscreenChanged, [this](bool value)
            {
                m_isTouch = value || m_formFactor->forceTouchScreen();
                Q_EMIT isTouchChanged();
            });
    
    connect(m_formFactor, &MauiMan::FormFactorManager::hasKeyboardChanged, [this](bool value)
            {
                Q_EMIT hasKeyboardChanged();
            });
    
    
    m_ffactor = static_cast<FFactor>(m_formFactor->preferredMode());
    
    if(MauiManUtils::isMauiSession())
    {
        m_mobile = m_ffactor == FFactor::Phone || m_ffactor == FFactor::Tablet;
    }
    else
    {
#if defined(Q_OS_ANDROID) || defined(Q_OS_IOS) || defined(UBUNTU_TOUCH)
        m_mobile = true;
#else
      // Mostly for debug purposes and for platforms which are always mobile,
      // such as Plasma Mobile
        if (qEnvironmentVariableIsSet("QT_QUICK_CONTROLS_MOBILE")) {
            m_mobile = QByteArrayList{"1", "true"}.contains(qgetenv("QT_QUICK_CONTROLS_MOBILE"));
        } else {
            m_mobile = false;
        }    
#endif
    }

#ifdef Q_OS_ANDROID
    m_isTouch = true;
#else
    m_isTouch = m_formFactor->hasTouchscreen() || m_formFactor->forceTouchScreen();
#endif
    
    if (m_isTouch)
    {
        connect(qApp, &QGuiApplication::focusWindowChanged, this, [this](QWindow *win)
                {
                    if (win)
                    {
                        win->installEventFilter(this);
                    }
                });
    }
    qDebug() << "DONE CREATING INSTANCE OF MAUI HANDY";
}

Handy *Handy::instance()
{
    return handyInstance();
}

bool Handy::isTouch()
{
    return m_isTouch;
}

Handy::FFactor Handy::formFactor()
{
    return m_ffactor;
}

bool Handy::hasTransientTouchInput() const
{
    return m_hasTransientTouchInput;
}

void Handy::setTransientTouchInput(bool touch)
{
    if (touch == m_hasTransientTouchInput) {
        return;
    }
    
    m_hasTransientTouchInput = touch;
    Q_EMIT hasTransientTouchInputChanged();
}

bool Handy::eventFilter(QObject *watched, QEvent *event)
{
    Q_UNUSED(watched)
    switch (event->type())
    {
    case QEvent::TouchBegin:
        setTransientTouchInput(true);
        break;
    case QEvent::MouseButtonPress:
    case QEvent::MouseMove: {
        QMouseEvent *me = static_cast<QMouseEvent *>(event);
        if (me->source() == Qt::MouseEventNotSynthesized)
        {
            setTransientTouchInput(false);
        }
        break;
    }
    case QEvent::Wheel:
        setTransientTouchInput(false);
    default:
        break;
    }
    
    return false;
}

#ifdef Q_OS_ANDROID
static inline struct {
    QList<QUrl> urls;
    QString text;
    bool cut = false;
    
    bool hasUrls()
    {
        return !urls.isEmpty();
    }
    bool hasText()
    {
        return !text.isEmpty();
    }
    
} _clipboard;
#endif

QVariantMap Handy::userInfo()
{
    QString name = qgetenv("USER");
    if (name.isEmpty())
        name = qgetenv("USERNAME");
    
    return QVariantMap({{FMH::MODEL_NAME[FMH::MODEL_KEY::NAME], name}});
}

QString Handy::getClipboardText()
{
#ifdef Q_OS_ANDROID
    auto clipboard = QGuiApplication::clipboard();
#else
    auto clipboard = QApplication::clipboard();
#endif
    
    auto mime = clipboard->mimeData();
    if (mime->hasText())
        return clipboard->text();
    
    return QString();
}

QVariantMap Handy::getClipboard()
{
    QVariantMap res;
#ifdef Q_OS_ANDROID
    if (_clipboard.hasUrls())
        res.insert("urls", QUrl::toStringList(_clipboard.urls));
    
    if (_clipboard.hasText())
        res.insert("text", _clipboard.text);
    
    res.insert("cut", _clipboard.cut);
#else
    auto clipboard = QApplication::clipboard();
    
    auto mime = clipboard->mimeData();
    
    if(!mime)
        return res;
    
    if (mime->hasUrls())
        res.insert("urls", QUrl::toStringList(mime->urls()));
    
    if (mime->hasText())
        res.insert("text", mime->text());
    
    if(mime->hasImage())
        res.insert("image", mime->imageData());
    
    const QByteArray a = mime->data(QStringLiteral("application/x-kde-cutselection"));
    
    res.insert("cut", !a.isEmpty() && a.at(0) == '1');
#endif
    return res;
}

bool Handy::copyToClipboard(const QVariantMap &value, const bool &cut)
{
#ifdef Q_OS_ANDROID
    if (value.contains("urls"))
        _clipboard.urls = QUrl::fromStringList(value["urls"].toStringList());
    
    if (value.contains("text"))
        _clipboard.text = value["text"].toString();
    
    _clipboard.cut = cut;
    
    return true;
#else
    auto clipboard = QApplication::clipboard();
    QMimeData *mimeData = new QMimeData();
    
    if (value.contains("urls"))
        mimeData->setUrls(QUrl::fromStringList(value["urls"].toStringList()));
    
    if (value.contains("text"))
        mimeData->setText(value["text"].toString());
    
    mimeData->setData(QStringLiteral("application/x-kde-cutselection"), cut ? "1" : "0");
    clipboard->setMimeData(mimeData);
    
    return true;
#endif
    
    return false;
}

bool Handy::copyTextToClipboard(const QString &text)
{
#ifdef Q_OS_ANDROID
    Handy::copyToClipboard({{"text", text}});
#else
    QApplication::clipboard()->setText(text);
#endif
    return true;
}

int Handy::version()
{
    return QOperatingSystemVersion::current().majorVersion();
}

bool Handy::isAndroid()
{
    return FMH::isAndroid();
}

bool Handy::isLinux()
{
    return FMH::isLinux();
}

bool Handy::isIOS()
{
    return FMH::isIOS();
}

bool Handy::hasKeyboard()
{
    return m_formFactor->hasKeyboard();
}

bool Handy::hasMouse()
{
    return m_formFactor->hasMouse();
}

bool Handy::isWindows()
{
    return FMH::isWindows();
}

bool Handy::isMac()
{
    return FMH::isMac();
}


QString Handy::formatSize(quint64 size)
{
    const QLocale locale;
    return locale.formattedDataSize(size);
}

QString Handy::formatDate(const QString &dateStr, const QString &format, const QString &initFormat)
{
    if (initFormat.isEmpty())
        return QDateTime::fromString(dateStr, Qt::TextDate).toString(format);
    else
        return QDateTime::fromString(dateStr, initFormat).toString(format);
}

QString Handy::formatTime(const qint64 &value)
{
    QString tStr;
    if (value) {
        QTime time((value / 3600) % 60, (value / 60) % 60, value % 60, (value * 1000) % 1000);
        QString format = "mm:ss";
        if (value > 3600)
        {
            format = "hh:mm:ss";
        }
        tStr = time.toString(format);
    }
    
    return tStr.isEmpty() ? "00:00" : tStr;
}

bool Handy::isMobile() const
{
    return m_mobile;
}

bool Handy::isEmail(const QString &text)
{
    QRegularExpression reg(R"(^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$)", QRegularExpression::CaseInsensitiveOption);

    auto res = reg.match(text);

    return res.hasMatch();
}

bool Handy::isPhoneNumber(const QString &text)
{
    QRegularExpression reg(R"(^[\+]?[(]?[0-9]{3}[)]?[-\s\.]?[0-9]{3}[-\s\.]?[0-9]{4,6}$)", QRegularExpression::CaseInsensitiveOption);

    auto res = reg.match(text);

    return res.hasMatch();
}

bool Handy::isWebLink(const QString &text)
{
    QRegularExpression reg(R"(^(https?:\/\/(?:www\.|(?!www))[a-zA-Z0-9][a-zA-Z0-9-]+[a-zA-Z0-9]\.[^\s]{2,}|www\.[a-zA-Z0-9][a-zA-Z0-9-]+[a-zA-Z0-9]\.[^\s]{2,}|https?:\/\/(?:www\.|(?!www))[a-zA-Z0-9]\.[^\s]{2,}|www\.[a-zA-Z0-9]\.[^\s]{2,})$)", QRegularExpression::CaseInsensitiveOption);

    auto res = reg.match(text);

    return res.hasMatch();
}

bool Handy::isFileLink(const QString &text)
{
    QUrl url = QUrl::fromUserInput(text);

    if(url.isValid())
    {
        QFileInfo file(url.toLocalFile());
        return file.exists();
    }

    return false;
}

bool Handy::isTimeDate(const QString &text)
{
    QDateTime dat = QDateTime::fromString(text);
    return dat.isValid();
}
