#include "NakPduDeserializer.h"

NakPduDeserializer::NakPduDeserializer(const uint8_t *pduBuf, size_t maxSize, NakInfo &info):
        FileDirectiveDeserializer(pduBuf, maxSize), nakInfo(info) {
}

ReturnValue_t NakPduDeserializer::parseData() {
    ReturnValue_t result = FileDirectiveDeserializer::parseData();
    if(result != HasReturnvaluesIF::RETURN_OK) {
        return result;
    }
    size_t currentIdx = FileDirectiveDeserializer::getHeaderSize();
    const uint8_t* buffer = rawPtr + currentIdx;
    size_t remSize = FileDirectiveDeserializer::getWholePduSize() - currentIdx;
    if (remSize < 1) {
        return SerializeIF::STREAM_TOO_SHORT;
    }
    result = nakInfo.getStartOfScope().deSerialize(&buffer, &remSize,
            SerializeIF::Endianness::NETWORK);
    if(result != HasReturnvaluesIF::RETURN_OK) {
        return result;
    }
    result = nakInfo.getEndOfScope().deSerialize(&buffer, &remSize,
            SerializeIF::Endianness::NETWORK);
    if(result != HasReturnvaluesIF::RETURN_OK) {
        return result;
    }
    nakInfo.setSegmentRequestLen(0);
    if(remSize > 0) {
       if(not nakInfo.canHoldSegmentRequests()) {
           return cfdp::NAK_CANT_PARSE_OPTIONS;
       }
       NakInfo::SegmentRequest* segReqs = nullptr;
       size_t maxSegReqs = 0;
       nakInfo.getSegmentRequests(&segReqs, nullptr, &maxSegReqs);
       if(segReqs != nullptr) {
           size_t idx = 0;
           while(remSize > 0) {
               if(idx == maxSegReqs) {
                   return cfdp::NAK_CANT_PARSE_OPTIONS;
               }
               result = segReqs[idx].first.deSerialize(&buffer, &remSize,
                       SerializeIF::Endianness::NETWORK);
               if(result != HasReturnvaluesIF::RETURN_OK) {
                   return result;
               }
               result = segReqs[idx].second.deSerialize(&buffer, &remSize,
                       SerializeIF::Endianness::NETWORK);
               if(result != HasReturnvaluesIF::RETURN_OK) {
                   return result;
               }
               idx++;
           }
           nakInfo.setSegmentRequestLen(idx);
       }
    }
    return result;
}