/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/**
 * Copyright (c) 2013-2017, Regents of the University of California.
 *
 * This file is part of ChronoShare, a decentralized file sharing application over NDN.
 *
 * ChronoShare is free software: you can redistribute it and/or modify it under the terms
 * of the GNU General Public License as published by the Free Software Foundation, either
 * version 3 of the License, or (at your option) any later version.
 *
 * ChronoShare is distributed in the hope that it will be useful, but WITHOUT ANY
 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
 * PARTICULAR PURPOSE.  See the GNU General Public License for more details.
 *
 * You should have received copies of the GNU General Public License along with
 * ChronoShare, e.g., in COPYING.md file.  If not, see <http://www.gnu.org/licenses/>.
 *
 * See AUTHORS.md for complete list of ChronoShare authors and contributors.
 */

#include "dispatcher.hpp"
#include "sync-core.hpp"

#include "core/logging.hpp"

#include <ndn-cxx/util/string-helper.hpp>

#include <boost/lexical_cast.hpp>

namespace ndn {
namespace chronoshare {

_LOG_INIT(DumpDb);

using std::cout;
using std::cerr;
using std::endl;
using std::setw;

namespace fs = boost::filesystem;

class StateLogDumper : public DbHelper
{
public:
  StateLogDumper(const fs::path& path)
    : DbHelper(path / ".chronoshare", "sync-log.db")
  {
  }

  void
  DumpState()
  {
    sqlite3_stmt* stmt;
    sqlite3_prepare_v2(m_db,
                       "SELECT hash(device_name, seq_no) FROM(SELECT * FROM SyncNodes ORDER BY device_name)",
                       -1, &stmt, 0);
    sqlite3_step(stmt);
    ndn::Buffer hash(sqlite3_column_blob(stmt, 0), sqlite3_column_bytes(stmt, 0));
    sqlite3_finalize(stmt);

    sqlite3_prepare_v2(m_db, "SELECT device_name, seq_no, last_known_locator, last_update "
                             "   FROM SyncNodes "
                             "   ORDER BY device_name",
                       -1, &stmt, 0);

    cout.setf(std::ios::left, std::ios::adjustfield);
    cout << ">> SYNC NODES(" << toHex(hash).substr(0, 8) << ") <<" << endl;
    cout << "===================================================================================="
         << endl;
    cout << setw(30) << "device_name"
         << " | seq_no | " << setw(20) << "locator"
         << " | last_update " << endl;
    cout << "===================================================================================="
         << endl;

    while (sqlite3_step(stmt) == SQLITE_ROW) {
      cout << setw(30)
           << (Name(Block(sqlite3_column_blob(stmt, 0), (sqlite3_column_bytes(stmt, 0))))).toUri()
           << " | ";                                             // device_name
      cout << setw(6) << sqlite3_column_int64(stmt, 1) << " | "; // seq_no
      cout << setw(20);
      if (sqlite3_column_bytes(stmt, 2) > 0) {
        cout << (Name(Block(sqlite3_column_blob(stmt, 2), (sqlite3_column_bytes(stmt, 2))))).toUri();
      }
      else {
        cout << "NULL";
      }
      cout << " | "; // locator

      if (sqlite3_column_bytes(stmt, 3) > 0) {
        cout << setw(10) << sqlite3_column_text(stmt, 3) << endl;
      }
      else {
        cout << "unknown" << endl;
      }
    }
    sqlite3_finalize(stmt);
  }

  void
  DumpLog()
  {
    sqlite3_stmt* stmt;
    sqlite3_prepare_v2(m_db, "SELECT state_hash, last_update, state_id, last_update "
                             "   FROM SyncLog "
                             "   ORDER BY last_update",
                       -1, &stmt, 0);

    cout.setf(std::ios::left, std::ios::adjustfield);
    cout << ">> SYNC LOG <<" << endl;
    cout << "===================================================================================="
         << endl;
    cout << setw(10) << "state_hash"
         << " | state details " << endl;
    cout << "===================================================================================="
         << endl;

    while (sqlite3_step(stmt) == SQLITE_ROW) {
      cout << setw(10)
           << toHex(reinterpret_cast<const uint8_t*>(sqlite3_column_blob(stmt, 0)),
                    sqlite3_column_bytes(stmt, 0))
                .substr(0, 8)
           << " | "; // state hash

      sqlite3_stmt* stmt2;
      sqlite3_prepare_v2(m_db,
                         "SELECT device_name, ss.seq_no "
                         "   FROM SyncStateNodes ss JOIN SyncNodes sn ON ss.device_id = sn.device_id "
                         "   WHERE state_id=? "
                         "   ORDER BY device_name",
                         -1, &stmt2, 0);
      _LOG_DEBUG_COND(sqlite3_errcode(m_db) != SQLITE_OK, sqlite3_errmsg(m_db));
      sqlite3_bind_int64(stmt2, 1, sqlite3_column_int64(stmt, 2));

      while (sqlite3_step(stmt2) == SQLITE_ROW) {
        cout << (Name(Block(sqlite3_column_blob(stmt2, 0), (sqlite3_column_bytes(stmt2, 0))))).toUri()
             << "(" << sqlite3_column_int64(stmt2, 1) << "); ";
      }

      sqlite3_finalize(stmt2);

      cout << endl;
    }
    sqlite3_finalize(stmt);
  }
};

class ActionLogDumper : public DbHelper
{
public:
  ActionLogDumper(const fs::path& path)
    : DbHelper(path / ".chronoshare", "action-log.db")
  {
  }

  void
  Dump()
  {
    sqlite3_stmt* stmt;
    sqlite3_prepare_v2(m_db,
                       "SELECT device_name, seq_no, action, filename, version, file_hash, file_seg_num, parent_device_name, parent_seq_no "
                       "   FROM ActionLog "
                       "   ORDER BY action_timestamp",
                       -1, &stmt, 0);

    cout.setf(std::ios::left, std::ios::adjustfield);
    cout << ">> ACTION LOG <<" << endl;
    cout << "============================================================================================================================================================================="
         << endl;
    cout << setw(30) << "device_name"
         << " | seq_no | action |" << setw(40) << " filename "
         << "  | version | file_hash  | seg_num | parent_device_name             | parent_seq_no"
         << endl;
    cout << "============================================================================================================================================================================="
         << endl;

    while (sqlite3_step(stmt) == SQLITE_ROW) {
      cout << setw(30)
           << (Name(Block(sqlite3_column_blob(stmt, 0), (sqlite3_column_bytes(stmt, 0))))).toUri()
           << " | ";                                             // device_name
      cout << setw(6) << sqlite3_column_int64(stmt, 1) << " | "; // seq_no
      cout << setw(6) << (sqlite3_column_int(stmt, 2) == 0 ? "UPDATE" : "DELETE") << " | "; // action
      cout << setw(40) << sqlite3_column_text(stmt, 3) << " | "; // filename
      cout << setw(7) << sqlite3_column_int64(stmt, 4) << " | "; // version

      if (sqlite3_column_int(stmt, 2) == 0) {
        cout << setw(10)
             << toHex(reinterpret_cast<const uint8_t*>(sqlite3_column_blob(stmt, 5)),
                      sqlite3_column_bytes(stmt, 5))
                  .substr(0, 8)
             << " | ";
        cout << setw(7) << sqlite3_column_int64(stmt, 6) << " | "; // seg_num
      }
      else
        cout << "           |         | ";

      if (sqlite3_column_bytes(stmt, 7) > 0) {
        cout << setw(30)
             << (Name(Block(sqlite3_column_blob(stmt, 7), (sqlite3_column_bytes(stmt, 7))))).toUri()
             << " | ";                                    // parent_device_name
        cout << setw(5) << sqlite3_column_int64(stmt, 8); // seq_no
      }
      else
        cout << setw(30) << " "
             << " | ";
      cout << endl;
    }

    sqlite3_finalize(stmt);
  }

  void
  DumpActionData(const ndn::Name& deviceName, int64_t seqno)
  {
    sqlite3_stmt* stmt;
    sqlite3_prepare_v2(m_db,
                       "SELECT action_content_object, action_name FROM ActionLog WHERE device_name = ? and seq_no = ?",
                       -1, &stmt, 0);
    const ndn::Block nameBlock = deviceName.wireEncode();
    sqlite3_bind_blob(stmt, 1, nameBlock.wire(), nameBlock.size(), SQLITE_STATIC);
    sqlite3_bind_int64(stmt, 2, seqno);
    cout << "Dumping action data for: [" << deviceName << ", " << seqno << "]" << endl;
    if (sqlite3_step(stmt) == SQLITE_ROW) {
      ndn::shared_ptr<ndn::Data> data = ndn::make_shared<ndn::Data>(
        ndn::Block(reinterpret_cast<const uint8_t*>(sqlite3_column_blob(stmt, 0)),
                   sqlite3_column_bytes(stmt, 0)));
      ndn::Name actionName =
        Name(Block(sqlite3_column_blob(stmt, 1), (sqlite3_column_bytes(stmt, 1))));
      if (data) {
        ActionItemPtr action = deserializeMsg<ActionItem>(
          ndn::Buffer(data->getContent().value(), data->getContent().value_size()));
        if (action) {
          cout << "Action data size : " << data->getContent().size() << endl;
          cout << "Action data name : " << actionName << endl;
          std::string type = action->action() == ActionItem::UPDATE ? "UPDATE" : "DELETE";
          cout << "Action Type = " << type << endl;
          cout << "Timestamp = " << action->timestamp() << endl;
          std::string filename = action->filename();
          cout << "Filename = " << filename << endl;
          if (action->has_seg_num()) {
            cout << "Segment number = " << action->seg_num() << endl;
          }
          if (action->has_file_hash()) {
            cout << "File hash = "
                 << toHex(reinterpret_cast<const uint8_t*>(action->file_hash().data()),
                          action->file_hash().size())
                      .substr(0, 8)
                 << endl;
          }
        }
        else {
          cerr << "Error! Failed to parse action from data! " << endl;
        }
      }
      else {
        cerr << "Error! Invalid data! " << endl;
      }
    }
    else {
      cerr << "Error! Can not find the requested action" << endl;
    }
    sqlite3_finalize(stmt);
  }
};

class FileStateDumper : public DbHelper
{
public:
  FileStateDumper(const fs::path& path)
    : DbHelper(path / ".chronoshare", "file-state.db")
  {
  }

  void
  Dump()
  {
    sqlite3_stmt* stmt;
    sqlite3_prepare_v2(m_db,
                       "SELECT filename,device_name,seq_no,file_hash,strftime('%s', file_mtime),file_chmod,file_seg_num,directory,is_complete "
                       "   FROM FileState "
                       "   WHERE type = 0 ORDER BY filename",
                       -1, &stmt, 0);

    cout.setf(std::ios::left, std::ios::adjustfield);
    cout << ">> FILE STATE <<" << endl;
    cout << "==================================================================================================================================="
         << endl;
    cout << "filename                                 | device_name                    | seq_no | file_hash  | seg_num | directory | is_complete"
         << endl;
    cout << "==================================================================================================================================="
         << endl;

    while (sqlite3_step(stmt) == SQLITE_ROW) {
      cout << setw(40) << sqlite3_column_text(stmt, 0) << " | ";
      cout << setw(30)
           << Name(Block(sqlite3_column_blob(stmt, 1), (sqlite3_column_bytes(stmt, 1)))).toUri()
           << " | ";
      cout << setw(6) << sqlite3_column_int64(stmt, 2) << " | ";
      cout << setw(10)
           << toHex(reinterpret_cast<const uint8_t*>(sqlite3_column_blob(stmt, 3)),
                    sqlite3_column_bytes(stmt, 3))
                .substr(0, 8)
           << " | ";
      cout << setw(6) << sqlite3_column_int64(stmt, 6) << " | ";
      if (sqlite3_column_bytes(stmt, 7) == 0)
        cout << setw(20) << "<NULL>"
             << " | ";
      else
        cout << setw(20) << sqlite3_column_text(stmt, 7) << " | ";

      if (sqlite3_column_int(stmt, 8) == 0)
        cout << setw(20) << "no" << endl;
      else
        cout << setw(20) << "yes" << endl;
    }

    sqlite3_finalize(stmt);
  }
};

int
main(int argc, char* argv[])
{
  if (argc != 3 && !(argc == 5 && std::string(argv[1]) == "action")) {
    cerr << "Usage: ./dump-db state|action|file|all <path-to-shared-folder>" << endl;
    cerr << "   or: ./dump-db action <path-to-shared-folder> <device-name> <seq-no>" << endl;
    return 1;
  }

  std::string type = argv[1];
  if (type == "state") {
    StateLogDumper dumper(argv[2]);
    dumper.DumpState();
    dumper.DumpLog();
  }
  else if (type == "action") {
    ActionLogDumper dumper(argv[2]);
    if (argc == 5) {
      dumper.DumpActionData(std::string(argv[3]), boost::lexical_cast<int64_t>(argv[4]));
    }
    else {
      dumper.Dump();
    }
  }
  else if (type == "file") {
    FileStateDumper dumper(argv[2]);
    dumper.Dump();
  }
  else if (type == "all") {
    {
      StateLogDumper dumper(argv[2]);
      dumper.DumpState();
      dumper.DumpLog();
    }

    {
      ActionLogDumper dumper(argv[2]);
      dumper.Dump();
    }

    {
      FileStateDumper dumper(argv[2]);
      dumper.Dump();
    }
  }
  else {
    cerr << "ERROR: Wrong database type" << endl;
    cerr << "\nUsage: ./dump-db state|action|file|all <path-to-shared-folder>" << endl;
    return 1;
  }

  return 0;
}

} // namespace chronoshare
} // namespace ndn

int
main(int argc, char* argv[])
{
  return ndn::chronoshare::main(argc, argv);
}