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#include "MacroWidget.h"

MacroWidget::MacroWidget(QWidget *parent) : QWidget(parent)

{

    sigmapTransmit = new QSignalMapper();

    sigmapKeybind = new QSignalMapper();

    btnExport = new QPushButton("Export");

    btnImport = new QPushButton("Import");

    btnAddMacro = new QPushButton("&Add");

    btnRemoveMacro = new QPushButton("&Remove");

    btnClear = new QPushButton("&Clear");

    currKeyBindInfo = QPair<QPushButton*,int>(NULL, 0);

    mainLayout = new QGridLayout();

    count = 0;

    connected = false;

    lastKnownFilePath = ".";

    ioLayout = new QHBoxLayout();

    ioLayout->addWidget(btnAddMacro);

    ioLayout->addWidget(btnRemoveMacro);

    ioLayout->addWidget(btnClear);

    ioLayout->addWidget(btnExport);

    ioLayout->addWidget(btnImport);

    ioLayout->addStretch();

    mainLayout->addLayout(ioLayout, 0, 0, 1, 2);

    for (int i = 0; i < MACRO_DEFAULT_COUNT; i++) {

        AddEntry();

    }

    setLayout(mainLayout);

    connect(btnAddMacro, SIGNAL(clicked()), this, SLOT(AddEntry()));

    connect(btnRemoveMacro, SIGNAL(clicked()), this, SLOT(RemoveEntry()));

    connect(btnClear, SIGNAL(clicked()), this, SLOT(Clear()));

    connect(btnExport, SIGNAL(clicked()), this, SLOT(WriteToFile()));

    connect(btnImport, SIGNAL(clicked()), this, SLOT(ReadFromFile()));

    connect(sigmapTransmit, SIGNAL(mapped(QWidget*)), this, SLOT(InitTransmit(QWidget*)));

    connect(sigmapKeybind, SIGNAL(mapped(int)), this, SLOT(KeybindPrompt(int)));

    // Register global event process for keyboard shortcut handling

    qApp->installEventFilter(this);

}

MacroWidget::~MacroWidget()

{

}

QSize MacroWidget::sizeHint() const

{

    return this->minimumSizeHint();

}

void MacroWidget::EnableTransmit(bool enable)

{

    if (enable) {

        connected = true;

        for (int i = 0; i < btnSendList.size(); i++) {

            btnSendList[i]->setEnabled(true);

        }

    } else {

        connected = false;

        for (int i = 0; i < btnSendList.size(); i++) {

            btnSendList[i]->setEnabled(false);

        }

    }

}

void MacroWidget::InitTransmit(QWidget *t)

{

    if (connected) {

        QTextEdit *text = qobject_cast<QTextEdit*>(t);

        emit TransmitText(text->toPlainText().toUtf8());

    }

}

void MacroWidget::KeybindPrompt(int id)

{

    QPushButton *btn = qobject_cast<QPushButton*>(sigmapKeybind->mapping(id));

    // Check to make sure we arn't processing another key first

    if (currKeyBindInfo.first != NULL) {

        currKeyBindInfo.first->setText("Hotkey: None");

        currKeyBindInfo.first->setDown(false);

        currKeyBindInfo.first->removeEventFilter(this);

    }

    // Mark and save button as waiting for key sequence

    btn->setDown(true);

    btn->setText("Waiting for Key..");

    currKeyBindInfo = QPair<QPushButton*,int>(btn, id);

    // Remove current keybinding for this macro

    int index = registeredKeyMacroIDs.indexOf(id);

    if (index >= 0) {

        registeredKeySequences.removeAt(index);

        registeredKeyMacroIDs.removeAt(index);

    }

    // Inspect all following keyboard events

    btn->installEventFilter(this);

}

void MacroWidget::AddEntry()

{

    count++;

    // Create new layout/widgets

    QLineEdit *lineEdit = new QLineEdit(QString("Macro %1").arg(count));

    lineEdit->setSizePolicy(QSizePolicy::Ignored, QSizePolicy::Fixed);

    lineEdit->setMinimumWidth(100);

    lineEdit->setAlignment(Qt::AlignCenter);

    nameList.append(lineEdit);

    QTextEdit *textEdit = new QTextEdit();

    textEdit->setMinimumHeight(50);

    textEdit->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);

    textEdit->setWordWrapMode(QTextOption::NoWrap);

    textEdit->setFont(QFont("Consolas", 8));

    textEdit->setAcceptRichText(false);

    textEdit->setTabChangesFocus(true);

    valueList.append(textEdit);

    QPushButton *keyButton = new QPushButton("Hotkey: None");

    keyButton->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed);

    btnKeyList.append(keyButton);

    QPushButton *pushButton = new QPushButton("Send Macro");

    pushButton->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);

    pushButton->setEnabled(connected);

    btnSendList.append(pushButton);

    QVBoxLayout *tmpLayout = new QVBoxLayout();

    tmpLayout->addWidget(lineEdit);

    tmpLayout->addWidget(keyButton);

    tmpLayout->addWidget(pushButton);

    // Add layout/widgets to main layout

    mainLayout->addLayout(tmpLayout, count, 0);

    mainLayout->addWidget(textEdit, count, 1);

    mainLayout->setColumnStretch(1, 1);

    // Associate KeyButton with its corresponding ID

    sigmapKeybind->setMapping(keyButton, count-1);

    connect(keyButton, SIGNAL(clicked()), sigmapKeybind, SLOT(map()));

    // Associate PushButton with its corresponding TextEdit

    sigmapTransmit->setMapping(pushButton, textEdit);

    connect(pushButton, SIGNAL(clicked()), sigmapTransmit, SLOT(map()));

    QLayoutItem *item = mainLayout->itemAtPosition(1, 1);

    int height = item->widget()->height() + mainLayout->verticalSpacing();

    QDockWidget *parent = qobject_cast<QDockWidget*>(this->parent());

    if (parent->isFloating())

        parent->resize(parent->width(), parent->height() + height);

    btnRemoveMacro->setEnabled(true);

}

void MacroWidget::RemoveEntry()

{

    // Remove and delete layout/widgets at last macro slot

    QLayoutItem *item = mainLayout->itemAtPosition(count, 0);

    while(!item->isEmpty())

        delete item->layout()->takeAt(0)->widget();

    delete item;

    item = mainLayout->itemAtPosition(count, 1);

    delete item->widget();

    item = mainLayout->itemAtPosition(1, 1);

    int height = item->widget()->height() + mainLayout->verticalSpacing();

    // Unmap and remove widgets from lists

    QPushButton *pushButton = btnSendList.back();

    sigmapTransmit->removeMappings(pushButton);

    QPushButton *keyButton = btnKeyList.back();

    sigmapKeybind->removeMappings(keyButton);

    nameList.pop_back();

    valueList.pop_back();

    btnSendList.pop_back();

    btnKeyList.pop_back();

    int index = registeredKeyMacroIDs.indexOf(count-1);

    if (index >= 0) {

        registeredKeySequences.removeAt(index);

        registeredKeyMacroIDs.removeAt(index);

    }

    count--;

    QDockWidget *parent = qobject_cast<QDockWidget*>(this->parent());

    if (parent->isFloating())

        parent->resize(parent->width(), parent->height() - height);

    if (count == 1)

        btnRemoveMacro->setEnabled(false);

}

void MacroWidget::Clear()

{

    for (int i = 0; i < count; i++) {

        nameList[i]->setText(QString("Macro %1").arg(i+1));

        valueList[i]->clear();

        btnKeyList[i]->setText("Hotkey: None");

    }

    registeredKeyMacroIDs.clear();

    registeredKeySequences.clear();

}

void MacroWidget::WriteToFile()

{

    QString file = QFileDialog::getSaveFileName(this, "Settings XML File", lastKnownFilePath, "XML File (*.xml)");

    QCoreApplication::processEvents(); // Wait for dialog to close

    if (file.size() == 0) return;

    // If file was selected, save directory for next time

    QFileInfo fileInfo = QFileInfo(file);

    lastKnownFilePath = fileInfo.absolutePath();

    if (file.size() != 0)

        QFile::remove(file);

    QFile inputFile(file);

    if (!inputFile.open(QIODevice::ReadWrite | QIODevice::Text)) return;

    QXmlStreamWriter stream(&inputFile);

    stream.setAutoFormatting(true);

    stream.writeStartDocument();

    stream.writeStartElement("Settings");

    stream.writeStartElement("Macro");

    for (int i = 0; i < count; i++) {

        stream.writeStartElement("Macro_Entry");

        stream.writeAttribute("Name", nameList[i]->text());

        stream.writeTextElement("Value", valueList[i]->toPlainText());

        int index = registeredKeyMacroIDs.indexOf(i);

        if (index >= 0) {

            stream.writeTextElement("Keybinding", registeredKeySequences[index].toString());

        } else {

            stream.writeTextElement("Keybinding", "");

        }

        stream.writeEndElement(); // Macro Entry

    }

    stream.writeEndElement(); // Macro

    stream.writeEndElement(); // Settings

    stream.writeEndDocument();

    inputFile.close();

}

void MacroWidget::ReadFromFile()

{

    int counter = 0;

    QString file = QFileDialog::getOpenFileName(this, "Settings XML File", lastKnownFilePath, "XML File (*.xml)");

    QCoreApplication::processEvents(); // Wait for dialog to close

    if (file.size() == 0) return;

    Clear();

    // If file was selected, save directory for next time

    QFileInfo fileInfo = QFileInfo(file);

    lastKnownFilePath = fileInfo.absolutePath();

    QFile inputFile(file);

    if (!inputFile.open(QIODevice::ReadWrite | QIODevice::Text)) return;

    QXmlStreamReader stream(&inputFile);

    // Parse the XML file till we reach the end  (or errors)

    while (!stream.atEnd() && !stream.hasError()) {

        QXmlStreamReader::TokenType token = stream.readNext();

        // Ignore StartDocument

        if (token == QXmlStreamReader::StartDocument) continue;

        // Parse StartElements

        if (token == QXmlStreamReader::StartElement) {

            // Ignore elements <Settings> and <Macro>

            if (stream.name() == "Settings") continue;

            if (stream.name() == "Macro") continue;

            // Parse element <Macro_Entry>

            if (stream.name() == "Macro_Entry") {

                QString name, value, keybinding;

                // Read and save attribute value

                QXmlStreamAttributes attr = stream.attributes();

                if (attr.hasAttribute("Name"))

                    name = attr.value("Name").toString();

                stream.readNext();

                // Loop in this element to find all sub-elements

                while (!(stream.tokenType() == QXmlStreamReader::EndElement && stream.name() == "Macro_Entry")) {

                    // Parse and save element value

                    if (stream.tokenType() == QXmlStreamReader::StartElement) {

                        if (stream.name() == "Value") {

                            stream.readNext();

                            value = stream.text().toString();

                        }

                        if (stream.name() == "Keybinding") {

                            stream.readNext();

                            keybinding = stream.text().toString();

                        }

                    }

                    stream.readNext();

                }

                // Write values to GUI

                if (counter == count)

                    AddEntry();

                nameList[counter]->setText(name);

                valueList[counter]->setText(value);

                if (keybinding != "") {

                    registeredKeySequences.append(QKeySequence(keybinding));

                    registeredKeyMacroIDs.append(counter);

                    btnKeyList[counter]->setText("Hotkey: " + keybinding);

                }

                counter++;

            }

        }

    }

}

bool MacroWidget::eventFilter(QObject *obj, QEvent *event)

{

    // Only process keyboard events

    if (event->type() == QEvent::KeyPress) {

        QKeyEvent *keyevent = static_cast<QKeyEvent*>(event);

        QKeySequence seq = keyevent->modifiers() + keyevent->key();

        if ((keyevent->key() >= 0x21 && keyevent->key() <= 0x2F) ||

            (keyevent->key() >= 0x3A && keyevent->key() <= 0x40) ||

            (keyevent->key() >= 0x5E && keyevent->key() <= 0x7E) ) {

            seq = keyevent->key();

        }

        if (connected) {

            // First check if key sequence matches any saved ones

            if (!registeredKeySequences.isEmpty()) {

                int index = registeredKeySequences.indexOf(seq);

                if (index >= 0) {

                    InitTransmit(valueList[registeredKeyMacroIDs[index]]);

                    return true;

                }

            }

        }

        // Then save key sequence if needed

        if (currKeyBindInfo.first != NULL) {

            // Ignore modifier keys and locks

            if (keyevent->key() == Qt::Key_Shift || keyevent->key() == Qt::Key_Control ||

                keyevent->key() == Qt::Key_Meta || keyevent->key() == Qt::Key_Alt ||

                keyevent->key() == Qt::Key_AltGr || keyevent->key() == Qt::Key_CapsLock ||

                keyevent->key() == Qt::Key_NumLock || keyevent->key() == Qt::Key_ScrollLock)

                return true;

            // Reset on ESC key

            if (keyevent->key() == Qt::Key_Escape) {

                currKeyBindInfo.first->setText("Hotkey: None");

                currKeyBindInfo.first->setDown(false);

                currKeyBindInfo.first->removeEventFilter(this);

                currKeyBindInfo = QPair<QPushButton*, int>(NULL, 0);

                return true;

            }

            // Otherwise save key sequence if it doesnt already exist

            if (!registeredKeySequences.contains(seq)) {

                registeredKeySequences.append(seq);

                registeredKeyMacroIDs.append(currKeyBindInfo.second);

                currKeyBindInfo.first->setText("Hotkey: " + seq.toString());

                currKeyBindInfo.first->setDown(false);

                currKeyBindInfo.first->removeEventFilter(this);

                currKeyBindInfo = QPair<QPushButton*, int>(NULL, 0);

                return true;

            }

        }

    }

    return QWidget::eventFilter(obj, event);

}