/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil -*- */
/*
 * Copyright (c) 2013, Regents of the University of California
 *                     Yingdi Yu
 *
 * BSD license, See the LICENSE file for more information
 *
 * Author: Yingdi Yu <yingdi@cs.ucla.edu>
 */

#include "chronos-invitation.h"

#include <ndn-cpp/security/certificate/identity-certificate.hpp>
#include "exception.h"
#include "logging.h"

using namespace std;
using namespace ndn;

INIT_LOGGER("ChronosInvitation");

ChronosInvitation::ChronosInvitation(const ndn::Name& originalInterestName)
  : m_interestName(originalInterestName)
{
  Name interestName = originalInterestName.getPrefix(-1);
  if(interestName.get(0).toEscapedString() != string("ndn")
     || interestName.get(1).toEscapedString() != string("broadcast")
     || interestName.get(2).toEscapedString() != string("chronos")
     || interestName.get(3).toEscapedString() != string("invitation"))
    throw LnException("Wrong ChronosInvitation Name");
    
  int i = 4;
  int size = interestName.size();

  string chatroomStr("chatroom");
  int inviteeBegin = 4;
  for(; i < size; i++)
    if(interestName.get(i).toEscapedString() == chatroomStr)
      break;

  if(i >= size)
    throw LnException("Wrong ChronosInvitation Name, No chatroom tag");
  m_inviteeNameSpace = interestName.getSubName(inviteeBegin, i - inviteeBegin);

  string inviterPrefixStr("inviter-prefix");
  int chatroomBegin = (++i);
  for(; i < size;  i++)
    if(interestName.get(i).toEscapedString() == inviterPrefixStr)
      break;

  if(i > size)
    throw LnException("Wrong ChronosInvitation Name, No inviter-prefix tag");
  m_chatroom = interestName.getSubName(chatroomBegin, i - chatroomBegin);

  string inviterStr("inviter");
  int inviterPrefixBegin = (++i);
  for(; i < size; i++)
    if(interestName.get(i).toEscapedString() == inviterStr)
      break;
  
  if(i > size)
    throw LnException("Wrong ChronosInvitation Name, No inviter tag");
  m_inviterPrefix = interestName.getSubName(inviterPrefixBegin, i - inviterPrefixBegin);

  int inviterCertBegin = (++i);
  m_inviterCertificateName = interestName.getSubName(inviterCertBegin, size - 1 - inviterCertBegin);
  
  m_signatureBits = interestName.get(-1).getValue();
 
  Name keyName = IdentityCertificate::certificateNameToPublicKeyName(m_inviterCertificateName);
  m_inviterNameSpace = keyName.getPrefix(-1);

  string signedName = interestName.getSubName(0, size - 1).toUri();
  m_signedBlob = Blob((const uint8_t*)signedName.c_str(), signedName.size());
}

ChronosInvitation::ChronosInvitation(const ChronosInvitation& invitation)
  : m_interestName(invitation.m_interestName)
  , m_inviteeNameSpace(invitation.m_inviteeNameSpace)
  , m_chatroom(invitation.m_chatroom)
  , m_inviterPrefix(invitation.m_inviterPrefix)
  , m_inviterCertificateName(invitation.m_inviterCertificateName)
  , m_signatureBits(invitation.m_signatureBits)
  , m_inviterNameSpace(invitation.m_inviterNameSpace)
  , m_signedBlob(invitation.m_signedBlob)
{}