#include "textmessagecomponent.h"
#include "blackmisc/nwuser.h"
#include "blackmisc/notificationsounds.h"
#include "ui_textmessagecomponent.h"

#include <QPushButton>
#include <QMenu>

using namespace BlackCore;
using namespace BlackMisc;
using namespace BlackGui;
using namespace BlackMisc::Network;
using namespace BlackMisc::Aviation;
using namespace BlackMisc::PhysicalQuantities;
using namespace BlackMisc::Settings;

namespace BlackGui
{

    CTextMessageComponent::CTextMessageComponent(QWidget *parent) :
        QTabWidget(parent), CRuntimeBasedComponent(nullptr, false), ui(new Ui::CTextMessageComponent), m_selcalCallback(nullptr), m_clearTextEditAction(nullptr), m_currentTextEdit(nullptr)
    {
        ui->setupUi(this);
        this->m_clearTextEditAction = new QAction("Clear", this);
        connect(this->m_clearTextEditAction, &QAction::triggered, this, &CTextMessageComponent::clearTextEdit);

        ui->te_TextMessagesAll->setContextMenuPolicy(Qt::CustomContextMenu);
        connect(ui->te_TextMessagesAll, &QTextEdit::customContextMenuRequested, this, &CTextMessageComponent::showContextMenuForTextEdit);

        ui->te_TextMessagesUnicom->setContextMenuPolicy(Qt::CustomContextMenu);
        connect(ui->te_TextMessagesUnicom, &QTextEdit::customContextMenuRequested, this, &CTextMessageComponent::showContextMenuForTextEdit);

        ui->te_TextMessagesCOM1->setContextMenuPolicy(Qt::CustomContextMenu);
        connect(ui->te_TextMessagesCOM1, &QTextEdit::customContextMenuRequested, this, &CTextMessageComponent::showContextMenuForTextEdit);

        ui->te_TextMessagesCOM2->setContextMenuPolicy(Qt::CustomContextMenu);
        connect(ui->te_TextMessagesCOM2, &QTextEdit::customContextMenuRequested, this, &CTextMessageComponent::showContextMenuForTextEdit);
    }

    CTextMessageComponent::~CTextMessageComponent()
    {
        delete ui;
    }

    QWidget *CTextMessageComponent::getTab(CTextMessageComponent::Tab tab)
    {
        switch (tab)
        {
        case TextMessagesAll:
            return this->ui->tb_TextMessagesAll;
        case TextMessagesCom1:
            return this->ui->tb_TextMessagesCOM1;
        case TextMessagesCom2:
            return this->ui->tb_TextMessagesCOM2;
        case TextMessagesUnicom:
            return this->ui->tb_TextMessagesUnicom;
        default:
            qFatal("Wrong index");
            break;
        }
        return nullptr;
    }

    /*
     * Text messages received or send, append to GUI
     */
    void CTextMessageComponent::appendTextMessagesToGui(const CTextMessageList &messages, bool sending)
    {
        if (messages.isEmpty()) return;
        foreach(CTextMessage message, messages)
        {
            const QString currentSelcal = this->m_selcalCallback ? this->m_selcalCallback() : "";
            if (CSelcal::isValidCode(currentSelcal) && message.isSelcalMessageFor(currentSelcal))
            {
                if (this->getOwnAircraft().isActiveFrequencyWithin25kHzChannel(message.getFrequency()))
                {
                    // this is SELCAL for me
                    if (this->getIContextAudio())
                    {
                        this->getIContextAudio()->playSelcalTone(currentSelcal);
                    }
                    else
                    {
                        emit this->displayInInfoWindow(CStatusMessage::getInfoMessage("SELCAL received", CStatusMessage::TypeGui).toCVariant(), 3 * 1000);
                    }
                }
                continue; // not displayed
            }

            bool relevantForMe = false;
            QString m = message.asString(true, false, "\t");

            if (message.isSendToUnicom())
            {
                this->ui->te_TextMessagesUnicom->append(m);
                relevantForMe = true;
            }

            // check message
            if (message.isRadioMessage())
            {
                // check for own COM frequencies
                if (message.isSendToFrequency(this->getOwnAircraft().getCom1System().getFrequencyActive()))
                {
                    this->ui->te_TextMessagesCOM1->append(m);
                    relevantForMe = true;
                }
                if (message.isSendToFrequency(this->getOwnAircraft().getCom2System().getFrequencyActive()))
                {
                    this->ui->te_TextMessagesCOM2->append(m);
                    relevantForMe = true;
                }
            }
            else if (message.isPrivateMessage() && !message.isServerMessage())
            {
                // private message
                this->addPrivateChannelTextMessage(message, sending);
                relevantForMe = true;
            }

            // message for me? right frequency? otherwise quit
            if (relevantForMe || message.isServerMessage()) this->ui->te_TextMessagesAll->append(m);
            if (!relevantForMe) return;

            // overlay message if this channel is not selected
            if (!sending && !message.isSendToUnicom() && !message.isServerMessage())
            {
                // if the channel is selected, do nothing
                if (!this->isCorrespondingTextMessageTabSelected(message))
                    emit this->displayInInfoWindow(message.toCVariant(), 5 * 1000);
            }
        }
    }

    void CTextMessageComponent::changedAircraftCockpit()
    {
        this->showCurrentFrequenciesFromCockpit();
    }

    void CTextMessageComponent::runtimeHasBeenSet()
    {
        connect(this->getIContextOwnAircraft(), &IContextOwnAircraft::changedAircraftCockpit, this, &CTextMessageComponent::changedAircraftCockpit);
    }

    /*
     * Is the tab of the message's receiver selected?
     */
    bool CTextMessageComponent::isCorrespondingTextMessageTabSelected(CTextMessage textMessage) const
    {
        if (!this->isVisible()) return false;
        if (!textMessage.hasValidRecipient()) return false;
        if (textMessage.isEmpty()) return false; // ignore empty message
        if (textMessage.isPrivateMessage())
        {
            // private message
            CCallsign cs = textMessage.getSenderCallsign();
            if (cs.isEmpty()) return false;
            QWidget *tab = this->findTextMessageTabByName(cs.getStringAsSet());
            if (!tab) return false;
            return this->currentWidget() == tab;
        }
        else
        {
            // frequency message
            const CAircraft ownAircraft = this->getOwnAircraft();
            if (this->currentWidget() == this->ui->tb_TextMessagesAll) return true;
            if (textMessage.isSendToFrequency(ownAircraft.getCom1System().getFrequencyActive()))
                return this->currentWidget() == this->ui->tb_TextMessagesCOM1;
            if (textMessage.isSendToFrequency(ownAircraft.getCom2System().getFrequencyActive()))
                return this->currentWidget() == this->ui->tb_TextMessagesCOM2;
            return false;
        }
    }

    void CTextMessageComponent::showCurrentFrequenciesFromCockpit()
    {
        const CAircraft ownAircraft = this->getOwnAircraft();
        QString f1n, f2n;
        f1n.sprintf("%03.3f", ownAircraft.getCom1System().getFrequencyActive().valueRounded(CFrequencyUnit::MHz(), 3));
        f2n.sprintf("%03.3f", ownAircraft.getCom2System().getFrequencyActive().valueRounded(CFrequencyUnit::MHz(), 3));
        const QString f1 = QString("COM1: %1").arg(f1n);
        const QString f2 = QString("COM2: %1").arg(f2n);
        this->ui->tb_TextMessagesCOM1->setToolTip(f1);
        this->ui->tb_TextMessagesCOM1->setToolTip(f2);
        this->setTabText(this->indexOf(this->ui->tb_TextMessagesCOM1), f1);
        this->setTabText(this->indexOf(this->ui->tb_TextMessagesCOM2), f2);
    }

    /*
     * Add new text message tab
     */
    QWidget *CTextMessageComponent::addNewTextMessageTab(const QString &tabName)
    {
        QWidget *newTab = new QWidget(this);
        QPushButton *closeButton = new QPushButton("Close", newTab);
        QVBoxLayout *layout = new QVBoxLayout(newTab);
        QTextEdit *textEdit = new QTextEdit(newTab);
        int marginLeft, marginRight, marginTop, marginBottom;
        this->ui->tb_TextMessagesAll->layout()->getContentsMargins(&marginLeft, &marginTop, &marginRight, &marginBottom);
        newTab->layout()->setContentsMargins(marginLeft, marginTop, marginRight, 2);
        textEdit->setReadOnly(true);
        textEdit->setWordWrapMode(QTextOption::NoWrap);
        layout->addWidget(textEdit);
        layout->addWidget(closeButton);
        newTab->setLayout(layout);
        textEdit->setContextMenuPolicy(Qt::CustomContextMenu);
        connect(textEdit, &QTextEdit::customContextMenuRequested, this, &CTextMessageComponent::showContextMenuForTextEdit);
        int index = this->addTab(newTab, tabName);
        this->connect(closeButton, &QPushButton::released, this, &CTextMessageComponent::closeTextMessageTab);
        this->setCurrentIndex(index);

        if (this->getIContextNetwork())
        {
            QString realName = this->getIContextNetwork()->getUserForCallsign(CCallsign(tabName)).getRealName();
            if (!realName.isEmpty()) this->setTabToolTip(index, realName);
        }
        return newTab;
    }

    /*
     * Add a private channel text message
     */
    void CTextMessageComponent::addPrivateChannelTextMessage(const CTextMessage &textMessage, bool sending)
    {
        if (!textMessage.isPrivateMessage()) return;
        CCallsign cs = sending ? textMessage.getRecipientCallsign() : textMessage.getSenderCallsign();
        if (cs.isEmpty()) return;
        QWidget *tab = this->findTextMessageTabByName(cs.getStringAsSet());
        if (tab == nullptr) tab = this->findTextMessageTabByName(cs.asString());
        if (tab == nullptr) tab = this->addNewTextMessageTab(cs.getStringAsSet());
        Q_ASSERT(tab != nullptr);
        QTextEdit *textEdit = tab->findChild<QTextEdit *>();
        Q_ASSERT(textEdit != nullptr);
        if (textEdit == nullptr) return; // do not crash, though this situation could not happen
        textEdit->append(textMessage.asString(true, false, "\t"));

        // sound
        if (this->getIContextAudio())
            this->getIContextAudio()->playNotification(BlackSound::CNotificationSounds::NotificationTextMessagePrivate, true);
    }

    /*
     * Message tab by name
     */
    QWidget *CTextMessageComponent::findTextMessageTabByName(const QString &name) const
    {
        if (name.isEmpty()) return nullptr;
        QString n = name.trimmed();
        for (int index = 0; index < this->count(); index++)
        {
            QString tabName = this->tabText(index);
            if (tabName.indexOf(n, 0, Qt::CaseInsensitive) < 0) continue;
            QWidget *tab = this->widget(index);
            return tab;
        }
        return nullptr;
    }

    /*
     * Text message stub (sender/receiver) for current channel
     */
    CTextMessage CTextMessageComponent::getTextMessageStubForChannel()
    {
        CTextMessage tm;
        int index = this->currentIndex();
        if (index < 0) return tm;
        if (index == this->indexOf(this->ui->tb_TextMessagesAll)) return tm;

        // from
        tm.setSenderCallsign(this->getOwnAircraft().getCallsign());

        // frequency text message?
        if (index == this->indexOf(this->ui->tb_TextMessagesCOM1))
        {
            tm.setFrequency(this->getOwnAircraft().getCom1System().getFrequencyActive());
        }
        else if (index == this->indexOf(this->ui->tb_TextMessagesCOM2))
        {
            tm.setFrequency(this->getOwnAircraft().getCom2System().getFrequencyActive());
        }
        else if (index == this->indexOf(this->ui->tb_TextMessagesUnicom))
        {
            tm.setFrequency(CPhysicalQuantitiesConstants::FrequencyUnicom());
        }
        else
        {
            // not a standard channel
            QString selectedTabText = this->tabText(index);
            bool isNumber;
            double frequency = selectedTabText.toDouble(&isNumber);
            if (isNumber)
            {
                CFrequency radioFrequency = CFrequency(frequency, CFrequencyUnit::MHz());
                if (CComSystem::isValidCivilAviationFrequency(radioFrequency))
                {
                    tm.setFrequency(radioFrequency);
                }
                else
                {
                    CCallsign toCallsign(selectedTabText);
                    tm.setRecipientCallsign(toCallsign);
                }
            }
            else
            {
                CCallsign toCallsign(selectedTabText);
                tm.setRecipientCallsign(toCallsign);
            }
        }
        return tm; // now valid message stub with receiver
    }

    /*
     * Close message tab
     */
    void CTextMessageComponent::closeTextMessageTab()
    {
        QObject *sender = QObject::sender();
        QWidget *parentWidget = qobject_cast<QWidget *>(sender->parent());
        Q_ASSERT(parentWidget);
        int index = -1;

        while (index < 0 && parentWidget)
        {
            index =  this->indexOf(parentWidget);
            parentWidget = parentWidget->parentWidget();
        }
        if (index >= 0) this->removeTab(index);
    }

    void CTextMessageComponent::showContextMenuForTextEdit(const QPoint &pt)
    {
        QObject *sender = QObject::sender();
        this->m_currentTextEdit = qobject_cast<QTextEdit *>(sender);
        Q_ASSERT(this->m_currentTextEdit);

        QMenu *menu = this->m_currentTextEdit->createStandardContextMenu();
        menu->setParent(this->m_currentTextEdit);
        menu->setObjectName(this->m_currentTextEdit->objectName().append("_contextMenu"));
        menu->addSeparator();
        menu->addAction(this->m_clearTextEditAction);
        menu->exec(this->m_currentTextEdit->mapToGlobal(pt));
        delete menu;
    }

    void CTextMessageComponent::clearTextEdit()
    {
        if (!this->m_currentTextEdit) return;
        this->m_currentTextEdit->clear();
        this->m_currentTextEdit = nullptr;
    }

    /*
     * Command entered
     */
    void CTextMessageComponent::commandEntered()
    {
        // TODO: just a first draft of the command line parser
        // needs to be refactored, as soon as a first version works

        QLineEdit *lineEdit = qobject_cast<QLineEdit *>(QObject::sender());
        Q_ASSERT(lineEdit);

        QString cmdLine = lineEdit->text().simplified();
        if (cmdLine.isEmpty()) return;
        QList<QString> parts = cmdLine.toLower().split(' ');
        if (parts.length() < 1) return;
        QString cmd = parts[0].startsWith('.') ? parts[0].toLower() : "";
        if (cmd == ".m" || cmd == ".msg")
        {
            if (!this->getIContextNetwork() || !this->getIContextNetwork()->isConnected())
            {
                this->sendStatusMessage(CStatusMessage(CStatusMessage::TypeTrafficNetwork, CStatusMessage::SeverityError, "network needs to be connected"));
                return;
            }
            if (parts.length() < 3)
            {
                this->sendStatusMessage(CStatusMessage(CStatusMessage::TypeValidation, CStatusMessage::SeverityError, "incorrect message"));
                return;
            }
            QString p = parts[1].trimmed(); // receiver

            // select current tab by command
            this->setVisible(true);
            if (p == "c1" || p == "com1")
            {
                this->setCurrentWidget(this->ui->tb_TextMessagesCOM1);
            }
            else if (p == "c2" || p == "com2")
            {
                this->setCurrentWidget(this->ui->tb_TextMessagesCOM2);
            }
            else if (p == "u" || p == "unicom" || p == "uni")
            {
                this->setCurrentWidget(this->ui->tb_TextMessagesUnicom);
            }
            else
            {
                QWidget *tab = this->findTextMessageTabByName(p.trimmed());
                if (tab == nullptr) tab = this->addNewTextMessageTab(p.trimmed().toUpper());
                this->setCurrentWidget(tab);
            }
            CTextMessage tm = this->getTextMessageStubForChannel();
            int index = cmdLine.indexOf(tm.getRecipientCallsign().getStringAsSet(), 0, Qt::CaseInsensitive);
            if (index < 0)
            {
                this->sendStatusMessage(
                    CStatusMessage(CStatusMessage::TypeValidation, CStatusMessage::SeverityError,
                                   "incomplete message")
                );
                return;
            }
            QString msg(cmdLine.mid(index + tm.getRecipientCallsign().asString().length() + 1));
            tm.setMessage(msg);
            if (tm.isEmpty()) return;
            if (!this->isNetworkConnected()) return;
            CTextMessageList tml(tm);
            this->getIContextNetwork()->sendTextMessages(tml);
            this->appendTextMessagesToGui(tml, true);
            lineEdit->setText("");
        }
        else if (cmd.startsWith("."))
        {
            // dump CMDs
        }
        else
        {
            // single line, no command
            // line is considered to be a message to the selected channel, send
            if (!this->isNetworkConnected())
            {
                this->sendStatusMessage(CStatusMessage(CStatusMessage::TypeTrafficNetwork, CStatusMessage::SeverityError, "network needs to be connected"));
                return;
            }

            if (!this->isVisible())
            {
                this->sendStatusMessage(CStatusMessage(CStatusMessage::TypeTrafficNetwork, CStatusMessage::SeverityError, "text messages can only be sent from corresponding page"));
                return;
            }

            int index = this->currentIndex();
            if (index < 0 || index == this->indexOf(this->ui->tb_TextMessagesAll))
            {
                this->sendStatusMessage(CStatusMessage(CStatusMessage::TypeValidation, CStatusMessage::SeverityError, "incorrect channel"));
            }
            else
            {
                CTextMessage tm = this->getTextMessageStubForChannel();
                tm.setMessage(cmdLine);
                if (tm.isEmpty()) return;
                if (!this->getIContextNetwork()) return;
                CTextMessageList textMessageList(tm);
                this->getIContextNetwork()->sendTextMessages(textMessageList);
                this->appendTextMessagesToGui(textMessageList, true);
                lineEdit->setText("");
            }
        }
    }
}