#include "DHTGetPeersReplyMessage.h"

#include <cppunit/extensions/HelperMacros.h>

#include "DHTNode.h"
#include "Exception.h"
#include "util.h"
#include "DHTBucket.h"
#include "bittorrent_helper.h"
#include "Peer.h"
#include "bencode2.h"

namespace aria2 {

class DHTGetPeersReplyMessageTest : public CppUnit::TestFixture {

  CPPUNIT_TEST_SUITE(DHTGetPeersReplyMessageTest);
  CPPUNIT_TEST(testGetBencodedMessage);
  CPPUNIT_TEST(testGetBencodedMessage6);
  CPPUNIT_TEST_SUITE_END();

public:
  void setUp() {}

  void tearDown() {}

  void testGetBencodedMessage();

  void testGetBencodedMessage6();
};

CPPUNIT_TEST_SUITE_REGISTRATION(DHTGetPeersReplyMessageTest);

void DHTGetPeersReplyMessageTest::testGetBencodedMessage()
{
  std::shared_ptr<DHTNode> localNode(new DHTNode());
  std::shared_ptr<DHTNode> remoteNode(new DHTNode());

  unsigned char tid[DHT_TRANSACTION_ID_LENGTH];
  util::generateRandomData(tid, DHT_TRANSACTION_ID_LENGTH);
  std::string transactionID(&tid[0], &tid[DHT_TRANSACTION_ID_LENGTH]);

  std::string token = "token";

  DHTGetPeersReplyMessage msg(AF_INET, localNode, remoteNode, token,
                              transactionID);
  msg.setVersion("A200");
  Dict dict;
  dict.put("t", transactionID);
  dict.put("v", "A200");
  dict.put("y", "r");
  auto rDict = Dict::g();
  rDict->put("id", String::g(localNode->getID(), DHT_ID_LENGTH));
  rDict->put("token", token);
  {
    std::string compactNodeInfo;
    std::shared_ptr<DHTNode> nodes[8];
    for (size_t i = 0; i < DHTBucket::K; ++i) {
      nodes[i].reset(new DHTNode());
      nodes[i]->setIPAddress("192.168.0." + util::uitos(i + 1));
      nodes[i]->setPort(6881 + i);

      unsigned char buf[COMPACT_LEN_IPV6];
      CPPUNIT_ASSERT_EQUAL(COMPACT_LEN_IPV4, bittorrent::packcompact(
                                                 buf, nodes[i]->getIPAddress(),
                                                 nodes[i]->getPort()));
      compactNodeInfo += std::string(&nodes[i]->getID()[0],
                                     &nodes[i]->getID()[DHT_ID_LENGTH]) +
                         std::string(&buf[0], &buf[COMPACT_LEN_IPV4]);
    }
    msg.setClosestKNodes(
        std::vector<std::shared_ptr<DHTNode>>(&nodes[0], &nodes[DHTBucket::K]));
    rDict->put("nodes", compactNodeInfo);

    std::vector<std::shared_ptr<Peer>> peers;
    auto valuesList = List::g();
    for (size_t i = 0; i < 4; ++i) {
      auto peer =
          std::make_shared<Peer>("192.168.0." + util::uitos(i + 1), 6881 + i);
      unsigned char buffer[COMPACT_LEN_IPV6];
      CPPUNIT_ASSERT_EQUAL(COMPACT_LEN_IPV4,
                           bittorrent::packcompact(buffer, peer->getIPAddress(),
                                                   peer->getPort()));
      valuesList->append(String::g(buffer, COMPACT_LEN_IPV4));
      peers.push_back(peer);
    }
    msg.setValues(peers);
    rDict->put("values", std::move(valuesList));
    dict.put("r", std::move(rDict));

    std::string msgbody = msg.getBencodedMessage();
    CPPUNIT_ASSERT_EQUAL(util::percentEncode(bencode2::encode(&dict)),
                         util::percentEncode(msgbody));
  }
}

void DHTGetPeersReplyMessageTest::testGetBencodedMessage6()
{
  std::shared_ptr<DHTNode> localNode(new DHTNode());
  std::shared_ptr<DHTNode> remoteNode(new DHTNode());

  unsigned char tid[DHT_TRANSACTION_ID_LENGTH];
  util::generateRandomData(tid, DHT_TRANSACTION_ID_LENGTH);
  std::string transactionID(&tid[0], &tid[DHT_TRANSACTION_ID_LENGTH]);

  std::string token = "token";

  DHTGetPeersReplyMessage msg(AF_INET6, localNode, remoteNode, token,
                              transactionID);
  msg.setVersion("A200");
  Dict dict;
  dict.put("t", transactionID);
  dict.put("v", "A200");
  dict.put("y", "r");
  auto rDict = Dict::g();
  rDict->put("id", String::g(localNode->getID(), DHT_ID_LENGTH));
  rDict->put("token", token);
  {
    std::string compactNodeInfo;
    std::shared_ptr<DHTNode> nodes[8];
    for (size_t i = 0; i < DHTBucket::K; ++i) {
      nodes[i].reset(new DHTNode());
      nodes[i]->setIPAddress("2001::000" + util::uitos(i + 1));
      nodes[i]->setPort(6881 + i);

      unsigned char buf[COMPACT_LEN_IPV6];
      CPPUNIT_ASSERT_EQUAL(COMPACT_LEN_IPV6, bittorrent::packcompact(
                                                 buf, nodes[i]->getIPAddress(),
                                                 nodes[i]->getPort()));
      compactNodeInfo += std::string(&nodes[i]->getID()[0],
                                     &nodes[i]->getID()[DHT_ID_LENGTH]) +
                         std::string(&buf[0], &buf[COMPACT_LEN_IPV6]);
    }
    msg.setClosestKNodes(
        std::vector<std::shared_ptr<DHTNode>>(&nodes[0], &nodes[DHTBucket::K]));
    rDict->put("nodes6", compactNodeInfo);

    std::vector<std::shared_ptr<Peer>> peers;
    auto valuesList = List::g();
    for (size_t i = 0; i < 4; ++i) {
      auto peer =
          std::make_shared<Peer>("2001::100" + util::uitos(i + 1), 6881 + i);
      unsigned char buffer[COMPACT_LEN_IPV6];
      CPPUNIT_ASSERT_EQUAL(COMPACT_LEN_IPV6,
                           bittorrent::packcompact(buffer, peer->getIPAddress(),
                                                   peer->getPort()));
      valuesList->append(String::g(buffer, COMPACT_LEN_IPV6));
      peers.push_back(peer);
    }
    msg.setValues(peers);
    rDict->put("values", std::move(valuesList));
    dict.put("r", std::move(rDict));

    std::string msgbody = msg.getBencodedMessage();
    CPPUNIT_ASSERT_EQUAL(util::percentEncode(bencode2::encode(&dict)),
                         util::percentEncode(msgbody));
  }
}

} // namespace aria2