#include "MetadataPduReader.h"

MetadataPduReader::MetadataPduReader(const uint8_t* pduBuf, size_t maxSize,
                                     MetadataGenericInfo& info, cfdp::Tlv* optionsArray,
                                     size_t optArrayMaxSize)
    : FileDirectiveReader(pduBuf, maxSize),
      info(info),
      optionArray(optionsArray),
      optionArrayMaxSize(optArrayMaxSize) {}

ReturnValue_t MetadataPduReader::parseData() {
  parsedOptions = 0;
  ReturnValue_t result = FileDirectiveReader::parseData();
  if (result != returnvalue::OK) {
    return result;
  }
  size_t currentIdx = FileDirectiveReader::getHeaderSize();
  const uint8_t* buf = pointers.rawPtr + currentIdx;
  size_t remSize = FileDirectiveReader::getWholePduSize() - currentIdx;
  if (remSize < 1) {
    return SerializeIF::STREAM_TOO_SHORT;
  }
  info.setClosureRequested((*buf >> 6) & 0x01);
  info.setChecksumType(static_cast<cfdp::ChecksumType>(*buf & 0x0f));
  remSize -= 1;
  buf += 1;
  auto endianness = getEndianness();
  result = info.getMutFileSize().deSerialize(&buf, &remSize, endianness);
  if (result != returnvalue::OK) {
    return result;
  }
  result = srcFileName.deSerialize(&buf, &remSize, endianness);
  if (result != returnvalue::OK) {
    return result;
  }
  result = destFileName.deSerialize(&buf, &remSize, endianness);
  if (result != returnvalue::OK) {
    return result;
  }

  if (remSize > 0) {
    if (optionArrayMaxSize == 0 or optionArray == nullptr) {
      return cfdp::METADATA_CANT_PARSE_OPTIONS;
    }
    size_t optsIdx = 0;
    while (remSize > 0) {
      if (optsIdx > optionArrayMaxSize) {
        return cfdp::METADATA_CANT_PARSE_OPTIONS;
      }
      result = optionArray[optsIdx].deSerialize(&buf, &remSize, endianness);
      if (result != returnvalue::OK) {
        return result;
      }
      optsIdx++;
    }
    parsedOptions = optsIdx;
  }
  return result;
}

size_t MetadataPduReader::getNumberOfParsedOptions() const { return parsedOptions; }

const cfdp::StringLv& MetadataPduReader::getSourceFileName() const { return srcFileName; }

const cfdp::StringLv& MetadataPduReader::getDestFileName() const { return destFileName; }

const MetadataGenericInfo& MetadataPduReader::getGenericInfo() const { return info; }