#include <qendian.h>
#include <QHostAddress>

//#include "../client/stream.h"
#include "payload.h"
#include "streambase.h"

#define SZ_FCS		4

PayloadConfigForm::PayloadConfigForm(QWidget *parent)
	: QWidget(parent)
{
	setupUi(this);
}

void PayloadConfigForm::on_cmbPatternMode_currentIndexChanged(int index)
{
	switch(index)
	{
		case OstProto::Payload::e_dp_fixed_word:
			lePattern->setEnabled(true);
			break;
		case OstProto::Payload::e_dp_inc_byte:
		case OstProto::Payload::e_dp_dec_byte:
		case OstProto::Payload::e_dp_random:
			lePattern->setDisabled(true);
			break;
		default:
			qWarning("Unhandled/Unknown PatternMode = %d",index);
	}
}

PayloadProtocol::PayloadProtocol(StreamBase *stream, AbstractProtocol *parent)
	: AbstractProtocol(stream, parent)
{
	configForm = NULL;
}

PayloadProtocol::~PayloadProtocol()
{
	delete configForm;
}

AbstractProtocol* PayloadProtocol::createInstance(StreamBase *stream,
	AbstractProtocol *parent)
{
	return new PayloadProtocol(stream, parent);
}

quint32 PayloadProtocol::protocolNumber() const
{
	return OstProto::Protocol::kPayloadFieldNumber;
}

void PayloadProtocol::protoDataCopyInto(OstProto::Protocol &protocol) const
{
	protocol.MutableExtension(OstProto::payload)->CopyFrom(data);
	protocol.mutable_protocol_id()->set_id(protocolNumber());
}

void PayloadProtocol::protoDataCopyFrom(const OstProto::Protocol &protocol)
{
	if (protocol.protocol_id().id() == protocolNumber() &&
			protocol.HasExtension(OstProto::payload))
		data.MergeFrom(protocol.GetExtension(OstProto::payload));
}

QString PayloadProtocol::name() const
{
	return QString("Payload Data");
}

QString PayloadProtocol::shortName() const
{
	return QString("DATA");
}

int	PayloadProtocol::protocolFrameSize() const
{
	return (mpStream->frameLen() - protocolFrameOffset() - SZ_FCS);
}

int	PayloadProtocol::fieldCount() const
{
	return payload_fieldCount;
}

AbstractProtocol::FieldFlags PayloadProtocol::fieldFlags(int index) const
{
	AbstractProtocol::FieldFlags flags;

	flags = AbstractProtocol::fieldFlags(index);

	switch (index)
	{
		case payload_dataPattern:
			break;

		// Meta fields
		case payload_dataPatternMode:
			flags |= FieldIsMeta;
			break;
	}

	return flags;
}

QVariant PayloadProtocol::fieldData(int index, FieldAttrib attrib,
		int streamIndex) const
{
	switch (index)
	{
		case payload_dataPattern:
			switch(attrib)
			{
				case FieldName:			
					return QString("Data");
				case FieldValue:
					return data.pattern();
				case FieldTextValue:
					return QString(fieldData(index, FieldFrameValue, 
							streamIndex).toByteArray().toHex());
				case FieldFrameValue:
				{
					QByteArray fv;
					int dataLen;

					dataLen = mpStream->frameLen() - protocolFrameOffset();
					dataLen -= SZ_FCS;

					// FIXME: Hack! Bad! Bad! Very Bad!!!
					if (dataLen <= 0)
						dataLen = 1;

					fv.resize(dataLen+4);
					switch(data.pattern_mode())
					{
						case OstProto::Payload::e_dp_fixed_word:
							for (int i = 0; i < (dataLen/4)+1; i++)
								qToBigEndian((quint32) data.pattern(), 
									(uchar*)(fv.data()+(i*4)) );
							break;
						case OstProto::Payload::e_dp_inc_byte:
							for (int i = 0; i < dataLen; i++)
								fv[i] = i % (0xFF + 1);
							break;
						case OstProto::Payload::e_dp_dec_byte:
							for (int i = 0; i < dataLen; i++)
								fv[i] = 0xFF - (i % (0xFF + 1));
							break;
						case OstProto::Payload::e_dp_random:
							//! \todo cksum will be incorrect for random pattern
							for (int i = 0; i < dataLen; i++)
								fv[i] =  qrand() % (0xFF + 1);
							break;
						default:
							qWarning("Unhandled data pattern %d", 
								data.pattern_mode());
					}
					fv.resize(dataLen);
					return fv;
				}
				default:
					break;
			}
			break;

		// Meta fields

		case payload_dataPatternMode:
		default:
			break;
	}

	return AbstractProtocol::fieldData(index, attrib, streamIndex);
}

bool PayloadProtocol::setFieldData(int index, const QVariant &value, 
		FieldAttrib attrib)
{
	// FIXME
	return false;
}


QWidget* PayloadProtocol::configWidget()
{
	if (configForm == NULL)
	{
		configForm = new PayloadConfigForm;
		loadConfigWidget();
	}
	return configForm;
}

void PayloadProtocol::loadConfigWidget()
{
	configWidget();

	configForm->cmbPatternMode->setCurrentIndex(data.pattern_mode());
	configForm->lePattern->setText(uintToHexStr(data.pattern(), 4));
}

void PayloadProtocol::storeConfigWidget()
{
	bool isOk;

	configWidget();

	data.set_pattern_mode((OstProto::Payload::DataPatternMode) 
		configForm->cmbPatternMode->currentIndex());
	data.set_pattern(configForm->lePattern->text().remove(QChar(' ')).toULong(&isOk, 16));
}