/**
 * @author: Jeff Thompson
 * See COPYING for copyright and distribution information.
 */

#include <cstdlib>
#include <sstream>
#include <iostream>
#include "../ndn-cpp/interest.hpp"
#include "../ndn-cpp/data.hpp"
#include "../ndn-cpp/forwarding-entry.hpp"
#include "../ndn-cpp/security/key-chain.hpp"

using namespace std;
using namespace ndn;

unsigned char Interest1[] = {
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0x33, 0x00, 0x03, 0xd2, 0xd6, 0x32, 0x31, 0x34, 0x37, 0x34, 0x38, 0x33, 0x36, 0x34, 0x37, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x02, 0xd2, 0x8e, 0x31, 0x00, 0x00,
1
};

static inline string toString(const vector<unsigned char>& v)
{
  if (!&v)
    return "";
  
  return string(&v[0], &v[0] + v.size());
}

static void dumpForwardingEntry(const ForwardingEntry& forwardingEntry) 
{
  cout << "action: " << forwardingEntry.getAction() << endl;
  cout << "prefix: " << forwardingEntry.getPrefix().to_uri() << endl;
  cout << "publisherPublicKeyDigest: " 
       << (forwardingEntry.getPublisherPublicKeyDigest().getPublisherPublicKeyDigest().size() > 0 ? toHex(*forwardingEntry.getPublisherPublicKeyDigest().getPublisherPublicKeyDigest()) : "<none>") << endl;
  cout << "faceId: ";
  if (forwardingEntry.getFaceId() >= 0)
    cout << forwardingEntry.getFaceId() << endl;
  else
    cout << "<none>" << endl;
  cout << "forwardingFlags: ";
  if (forwardingEntry.getForwardingFlags() >= 0)
    cout << forwardingEntry.getForwardingFlags() << endl;
  else
    cout << "<none>" << endl;
  cout << "freshnessSeconds: ";
  if (forwardingEntry.getFreshnessSeconds() >= 0)
    cout << forwardingEntry.getFreshnessSeconds() << endl;
  else
    cout << "<none>" << endl;
}

/**
 * Show the interest name and scope, and expect the name to have 4 components where the last component is a data packet 
 * whose content is a forwarding entry.
 */
static void dumpInterestWithForwardingEntry(const Interest& interest)
{
  if (interest.getName().getComponentCount() != 4) {
    cout << "Error: expected the interest name to have 4 components.  Got: " << interest.getName().to_uri() << endl;
    return;
  }

  cout << "scope: ";
  if (interest.getScope() >= 0)
    cout << interest.getScope() << endl;
  else
    cout << "<none>" << endl;
  cout << "name[0]: " << toString(*interest.getName().getComponent(0).getValue()) << endl;
  cout << "name[1]: " << toHex(*interest.getName().getComponent(1).getValue()) << endl;
  cout << "name[2]: " << toString(*interest.getName().getComponent(2).getValue()) << endl;
  cout << "name[3] decoded as Data, showing content as ForwardingEntry: " << endl;
  
  Data data;
  data.wireDecode(*interest.getName().getComponent(3).getValue());
  
  ForwardingEntry forwardingEntry;
  forwardingEntry.wireDecode(*data.getContent());
  dumpForwardingEntry(forwardingEntry);
}

int main(int argc, char** argv)
{
  try {
    Interest interest;
    interest.wireDecode(Interest1, sizeof(Interest1));
    cout << "Interest:" << endl;
    dumpInterestWithForwardingEntry(interest);
    
    Blob encoding = interest.wireEncode();
    cout << endl << "Re-encoded interest " << toHex(*encoding) << endl;

    Interest reDecodedInterest;
    reDecodedInterest.wireDecode(*encoding);
    cout << "Re-decoded Interest:" << endl;
    dumpInterestWithForwardingEntry(reDecodedInterest);
  } catch (exception& e) {
    cout << "exception: " << e.what() << endl;
  }
  return 0;
}