#include "DataPool.h"
#include "PoolEntryIF.h"
#include "PoolRawAccess.h"
#include "../serviceinterface/ServiceInterfaceStream.h"
#include "../serialize/EndianConverter.h"

#include <cstring>

PoolRawAccess::PoolRawAccess(uint32_t set_id, uint8_t setArrayEntry,
		DataSetIF *data_set, ReadWriteMode_t setReadWriteMode) :
		dataPoolId(set_id), arrayEntry(setArrayEntry), valid(false), type(
				Type::UNKNOWN_TYPE), typeSize(0), arraySize(0), sizeTillEnd(0), readWriteMode(
				setReadWriteMode) {
	memset(value, 0, sizeof(value));
	if (data_set != NULL) {
		data_set->registerVariable(this);
	}
}

PoolRawAccess::~PoolRawAccess() {

}

ReturnValue_t PoolRawAccess::read() {
	PoolEntryIF *read_out = ::dataPool.getRawData(dataPoolId);
	if (read_out != NULL) {
		valid = read_out->getValid();
		if (read_out->getSize() > arrayEntry) {
			arraySize = read_out->getSize();
			typeSize = read_out->getByteSize() / read_out->getSize();
			type = read_out->getType();
			if (typeSize <= sizeof(value)) {
				uint16_t arrayPosition = arrayEntry * typeSize;
				sizeTillEnd = read_out->getByteSize() - arrayPosition;
				uint8_t *ptr =
						&((uint8_t*) read_out->getRawData())[arrayPosition];
				memcpy(value, ptr, typeSize);
				return HasReturnvaluesIF::RETURN_OK;
			} else {
				//Error value type too large.
			}
		} else {
			//Error index requested too large
		}
	} else {
		//Error entry does not exist.
	}
	sif::error << "PoolRawAccess: read of DP Variable 0x" << std::hex
			<< dataPoolId << std::dec << " failed." << std::endl;
	valid = INVALID;
	typeSize = 0;
	sizeTillEnd = 0;
	memset(value, 0, sizeof(value));
	return HasReturnvaluesIF::RETURN_FAILED;
}

ReturnValue_t PoolRawAccess::commit() {
	PoolEntryIF *write_back = ::dataPool.getRawData(dataPoolId);
	if ((write_back != NULL) && (readWriteMode != VAR_READ)) {
		write_back->setValid(valid);
		uint8_t array_position = arrayEntry * typeSize;
		uint8_t *ptr = &((uint8_t*) write_back->getRawData())[array_position];
		memcpy(ptr, value, typeSize);
		return HasReturnvaluesIF::RETURN_OK;
	} else {
		return HasReturnvaluesIF::RETURN_FAILED;
	}
}

uint8_t* PoolRawAccess::getEntry() {
	return value;
}

ReturnValue_t PoolRawAccess::getEntryEndianSafe(uint8_t *buffer,
		size_t *writtenBytes, size_t maxSize) {
	uint8_t *data_ptr = getEntry();
//	debug << "PoolRawAccess::getEntry: Array position: " << index * size_of_type << " Size of T: " << (int)size_of_type << " ByteSize: " << byte_size << " Position: " << *size << std::endl;
	if (typeSize == 0) {
		return DATA_POOL_ACCESS_FAILED;
	}
	if (typeSize > maxSize) {
		return INCORRECT_SIZE;
	}
	EndianConverter::convertBigEndian(buffer, data_ptr, typeSize);
	*writtenBytes = typeSize;
	return HasReturnvaluesIF::RETURN_OK;
}

Type PoolRawAccess::getType() {
	return type;
}

size_t PoolRawAccess::getSizeOfType() {
	return typeSize;
}

size_t PoolRawAccess::getArraySize() {
	return arraySize;
}

uint32_t PoolRawAccess::getDataPoolId() const {
	return dataPoolId;
}

PoolVariableIF::ReadWriteMode_t PoolRawAccess::getReadWriteMode() const {
	return readWriteMode;
}

ReturnValue_t PoolRawAccess::setEntryFromBigEndian(const uint8_t *buffer,
		size_t setSize) {
	if (typeSize == setSize) {
		EndianConverter::convertBigEndian(value, buffer, typeSize);
		return HasReturnvaluesIF::RETURN_OK;
	} else {
		sif::error
				<< "PoolRawAccess::setEntryFromBigEndian: Illegal sizes: Internal"
				<< (uint32_t) typeSize << ", Requested: " << setSize
				<< std::endl;
		return INCORRECT_SIZE;
	}
}

bool PoolRawAccess::isValid() const {
	if (valid != INVALID)
		return true;
	else
		return false;
}

void PoolRawAccess::setValid(uint8_t valid) {
	this->valid = valid;
}

size_t PoolRawAccess::getSizeTillEnd() const {
	return sizeTillEnd;
}

ReturnValue_t PoolRawAccess::serialize(uint8_t **buffer, size_t *size,
		size_t maxSize, Endianness streamEndianness) const {
	if (typeSize + *size <= maxSize) {
		switch (streamEndianness) {
		case (Endianness::BIG):
			EndianConverter::convertBigEndian(*buffer, value, typeSize);
			break;
		case (Endianness::LITTLE):
			EndianConverter::convertLittleEndian(*buffer, value, typeSize);
			break;
		default:
		case (Endianness::MACHINE):
			memcpy(*buffer, value, typeSize);
			break;
		}
		*size += typeSize;
		(*buffer) += typeSize;
		return HasReturnvaluesIF::RETURN_OK;
	} else {
		return SerializeIF::BUFFER_TOO_SHORT;
	}
}

size_t PoolRawAccess::getSerializedSize() const {
	return typeSize;
}

ReturnValue_t PoolRawAccess::deSerialize(const uint8_t **buffer, size_t *size,
		Endianness streamEndianness) {

	if (*size >= typeSize) {
		switch (streamEndianness) {
		case (Endianness::BIG):
			EndianConverter::convertBigEndian(value, *buffer, typeSize);
			break;
		case (Endianness::LITTLE):
			EndianConverter::convertLittleEndian(value, *buffer, typeSize);
			break;
		default:
		case (Endianness::MACHINE):
			memcpy(value, *buffer, typeSize);
			break;
		}
		*size -= typeSize;
		*buffer += typeSize;
		return HasReturnvaluesIF::RETURN_OK;
	} else {
		return SerializeIF::STREAM_TOO_SHORT;
	}
}