#include "newgraphdialog.h"
#include "ui_newgraphdialog.h"
#include <QColorDialog>
#include "utility.h"
#include "helpwindow.h"

NewGraphDialog::NewGraphDialog(DBCHandler *handler, QWidget *parent) :
    QDialog(parent),
    ui(new Ui::NewGraphDialog)
{
    ui->setupUi(this);

    dbcHandler = handler;

    connect(ui->colorSwatch, SIGNAL(clicked(bool)), this, SLOT(colorSwatchClick()));
    connect(ui->btnAddGraph, SIGNAL(clicked(bool)), this, SLOT(addButtonClicked()));

    // Seed the random generator with current time
    QTime time = QTime::currentTime();
    qsrand((uint)time.msec());

    QPalette p = ui->colorSwatch->palette();
    //using 160 instead of 255 so that colors are always at least a little dark
    p.setColor(QPalette::Button, QColor(qrand() % 160,qrand() % 160,qrand() % 160));
    ui->colorSwatch->setPalette(p);

    connect(ui->cbMessages, SIGNAL(currentIndexChanged(int)), this, SLOT(loadSignals(int)));
    connect(ui->gridData, SIGNAL(gridClicked(int,int)), this, SLOT(bitfieldClicked(int,int)));
    connect(ui->txtDataLen, SIGNAL(textChanged(QString)), this, SLOT(handleDataLenUpdate()));
    connect(ui->cbIntel, SIGNAL(toggled(bool)), this, SLOT(drawBitfield()));
    connect(ui->btnCopySignal, SIGNAL(clicked(bool)), this, SLOT(copySignalToParamsUI()));

    startBit = 0;
    dataLen = 1;

    loadMessages();

    installEventFilter(this);
}

NewGraphDialog::~NewGraphDialog()
{
    removeEventFilter(this);
    delete ui;
}

void NewGraphDialog::showEvent(QShowEvent* event)
{
    QDialog::showEvent(event);
    loadMessages();
    drawBitfield();
    qDebug() << "S" << ui->gridData->geometry();
}

bool NewGraphDialog::eventFilter(QObject *obj, QEvent *event)
{
    if (event->type() == QEvent::KeyRelease) {
        QKeyEvent *keyEvent = static_cast<QKeyEvent *>(event);
        switch (keyEvent->key())
        {
        case Qt::Key_F1:
            HelpWindow::getRef()->showHelp("graphsetup.html");
            break;
        }
        return true;
    } else {
        // standard event processing
        return QObject::eventFilter(obj, event);
    }
    return false;
}

void NewGraphDialog::addButtonClicked()
{
    accept();
}

void NewGraphDialog::colorSwatchClick()
{
    QColor newColor = QColorDialog::getColor(ui->colorSwatch->palette().button().color());

    QPalette p = ui->colorSwatch->palette();
    p.setColor(QPalette::Button, newColor);
    ui->colorSwatch->setPalette(p);

}

void NewGraphDialog::clearParams()
{
    ui->txtID->clear();
    ui->txtBias->clear();
    ui->txtMask->clear();
    ui->txtScale->clear();
    ui->txtStride->clear();
    ui->txtName->clear();
}

void NewGraphDialog::setParams(GraphParams &params)
{
    ui->txtBias->setText(QString::number(params.bias));
    ui->txtMask->setText(Utility::formatNumber(params.mask));
    ui->txtScale->setText(QString::number(params.scale));
    ui->txtStride->setText(QString::number(params.stride));
    ui->cbSigned->setChecked(params.isSigned);
    ui->cbIntel->setChecked(params.intelFormat);

    startBit = params.startBit;
    dataLen = params.numBits;
    ui->txtDataLen->setText(QString::number(dataLen));
    ui->txtID->setText(Utility::formatCANID(params.ID));
    ui->txtName->setText(params.graphName);
    QPalette p = ui->colorSwatch->palette();
    p.setColor(QPalette::Button, params.color);
    ui->colorSwatch->setPalette(p);
    loadMessages();
    drawBitfield();
}

void NewGraphDialog::getParams(GraphParams &params)
{
    params.color = ui->colorSwatch->palette().button().color();
    params.graphName = ui->txtName->text();

    params.ID = Utility::ParseStringToNum(ui->txtID->text());
    params.bias = ui->txtBias->text().toFloat();
    params.isSigned = ui->cbSigned->isChecked();
    params.intelFormat = ui->cbIntel->isChecked();
    params.mask = Utility::ParseStringToNum(ui->txtMask->text());
    params.scale = ui->txtScale->text().toFloat();
    params.stride = Utility::ParseStringToNum(ui->txtStride->text());

    params.startBit = startBit;
    params.numBits = dataLen;

    //now catch stupidity and bring it to defaults
    if (params.mask == 0) params.mask = 0xFFFFFFFF;
    if (fabs(params.scale) < 0.00000001) params.scale = 1.0f;
    if (params.stride < 1) params.stride = 1;
}

void NewGraphDialog::loadMessages()
{
    ui->cbMessages->clear();
    if (dbcHandler == NULL) return;
    if (dbcHandler->getFileCount() == 0) return;
    for (int y = 0; y < dbcHandler->getFileCount(); y++)
    {
        for (int x = 0; x < dbcHandler->getFileByIdx(y)->messageHandler->getCount(); x++)
        {
            ui->cbMessages->addItem(dbcHandler->getFileByIdx(y)->messageHandler->findMsgByIdx(x)->name);
        }
    }
}

void NewGraphDialog::loadSignals(int idx)
{
    Q_UNUSED(idx);
    //messages were placed into the list in the same order as they exist
    //in the data structure so it should have been possible to just
    //look it up based on index but by name is probably safer and this operation
    //is not time critical at all.
    DBC_MESSAGE *msg = dbcHandler->getFileByIdx(0)->messageHandler->findMsgByName(ui->cbMessages->currentText());

    if (msg == NULL) return;
    ui->cbSignals->clear();
    for (int x = 0; x < msg->sigHandler->getCount(); x++)
    {
        ui->cbSignals->addItem(msg->sigHandler->findSignalByIdx(x)->name);
    }
}

void NewGraphDialog::bitfieldClicked(int x,int y)
{
    int bit = (y * 8 + (7-x));

    qDebug() << "Clicked bit: " << bit;
    startBit = bit;
    drawBitfield();
}

void NewGraphDialog::drawBitfield()
{
    qDebug() << "Draw Bitfield";
    int64_t bitField = 0;
    int endBit, sBit;

    bitField |= 1ull << (startBit); //make the start bit a different color to set it apart
    ui->gridData->setReference((unsigned char *)&bitField, false);

    if (ui->cbIntel->isChecked())
    {
        endBit = startBit + dataLen - 1;
        if (startBit < 0) startBit = 0;
        if (endBit > 63) endBit = 63;
        for (int y = startBit; y <= endBit; y++)
        {
            bitField |= 1ull << y;
        }
    }
    else //big endian / motorola format
    {
        //much more irritating than the intel version...
        int size = dataLen;
        sBit = startBit;
        while (size > 0)
        {
            bitField |= 1ull << sBit;
            size--;
            if ((sBit % 8) == 0) sBit += 15;
            else sBit--;
            if (sBit > 63) sBit = 63;
        }
    }

    ui->gridData->updateData((unsigned char *)&bitField, true);
}

void NewGraphDialog::handleDataLenUpdate()
{
    dataLen = ui->txtDataLen->text().toInt();
    if (dataLen < 1) dataLen = 1;
    if (dataLen > 63) dataLen = 63;
    drawBitfield();
}

void NewGraphDialog::copySignalToParamsUI()
{
    DBC_MESSAGE *msg = dbcHandler->getFileByIdx(0)->messageHandler->findMsgByName(ui->cbMessages->currentText());
    if (!msg) return;
    DBC_SIGNAL *sig = msg->sigHandler->findSignalByName(ui->cbSignals->currentText());
    if (!sig) return;

    startBit = sig->startBit;
    ui->txtBias->setText(QString::number(sig->bias));
    ui->txtDataLen->setText(QString::number(sig->signalSize));
    ui->txtID->setText(Utility::formatCANID(msg->ID));
    ui->txtMask->setText("0xFFFFFFFF");
    ui->txtName->setText(sig->name);
    ui->txtScale->setText(QString::number(sig->factor));
    ui->txtStride->setText("1");
    ui->cbIntel->setChecked(sig->intelByteOrder);
    if (sig->valType == SIGNED_INT) ui->cbSigned->setChecked(true);
        else ui->cbSigned->setChecked(false);
    drawBitfield();
}