#include "FileDataDeserializer.h"

FileDataDeserializer::FileDataDeserializer(const uint8_t *pduBuf, size_t maxSize,
        FileDataInfo& info):
        HeaderDeserializer(pduBuf, maxSize), info(info) {
}

ReturnValue_t FileDataDeserializer::parseData() {
    ReturnValue_t result = HeaderDeserializer::parseData();
    if(result != HasReturnvaluesIF::RETURN_OK) {
        return result;
    }
    size_t currentIdx = HeaderDeserializer::getHeaderSize();
    const uint8_t* buf = rawPtr + currentIdx;
    size_t remSize = HeaderDeserializer::getWholePduSize() - currentIdx;
    if (remSize < 1) {
        return SerializeIF::STREAM_TOO_SHORT;
    }
    if(hasSegmentMetadataFlag()) {
        info.setSegmentMetadataFlag(true);
        info.setRecordContinuationState(static_cast<cfdp::RecordContinuationState>(
                (*buf >> 6) & 0b11));
        size_t segmentMetadataLen = *buf & 0b00111111;
        info.setSegmentMetadataLen(segmentMetadataLen);
        if(remSize < segmentMetadataLen + 1) {
            return SerializeIF::STREAM_TOO_SHORT;
        }
        if(segmentMetadataLen > 0) {
            buf += 1;
            remSize -= 1;
            info.setSegmentMetadata(buf);
            buf += segmentMetadataLen;
            remSize -= segmentMetadataLen;
        }
    }
    result = info.getOffset().deSerialize(&buf, &remSize, this->getEndianness());
    if(result != HasReturnvaluesIF::RETURN_OK) {
        return result;
    }
    if(remSize > 0) {
        info.setFileData(buf, remSize);
    }
    return HasReturnvaluesIF::RETURN_OK;
}

SerializeIF::Endianness FileDataDeserializer::getEndianness() const {
    return endianness;
}

void FileDataDeserializer::setEndianness(SerializeIF::Endianness endianness) {
    this->endianness = endianness;
}