// Copyright (c) 2014-2016, The Monero Project
//
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without modification, are
// permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this list of
//    conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright notice, this list
//    of conditions and the following disclaimer in the documentation and/or other
//    materials provided with the distribution.
//
// 3. Neither the name of the copyright holder nor the names of its contributors may be
//    used to endorse or promote products derived from this software without specific
//    prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

#include "bootstrap_file.h"
#include "blocksdat_file.h"
#include "common/command_line.h"
#include "blockchain_db/blockchain_db.h"
#include "blockchain_db/lmdb/db_lmdb.h"
#if defined(BERKELEY_DB)
#include "blockchain_db/berkeleydb/db_bdb.h"
#endif
#include "blockchain_db/db_types.h"
#include "version.h"

namespace po = boost::program_options;
using namespace epee; // log_space

std::string join_set_strings(const std::unordered_set<std::string>& db_types_all, const char* delim)
{
  std::string result;
  std::ostringstream s;
  std::copy(db_types_all.begin(), db_types_all.end(), std::ostream_iterator<std::string>(s, delim));
  result = s.str();
  if (result.length() > 0)
    result.erase(result.end()-strlen(delim), result.end());
  return result;
}

int main(int argc, char* argv[])
{
#if defined(BLOCKCHAIN_DB) && (BLOCKCHAIN_DB == DB_MEMORY)
  std::string default_db_type = "memory";
#else
  std::string default_db_type = "lmdb";
#endif

  std::unordered_set<std::string> db_types_all = cryptonote::blockchain_db_types;
  db_types_all.insert("memory");

  std::string available_dbs = join_set_strings(db_types_all, ", ");
  available_dbs = "available: " + available_dbs;

  uint32_t log_level = 0;
  uint64_t block_stop = 0;
  bool blocks_dat = false;

  tools::sanitize_locale();

  boost::filesystem::path default_data_path {tools::get_default_data_dir()};
  boost::filesystem::path default_testnet_data_path {default_data_path / "testnet"};
  boost::filesystem::path output_file_path;

  po::options_description desc_cmd_only("Command line options");
  po::options_description desc_cmd_sett("Command line options and settings options");
  const command_line::arg_descriptor<std::string> arg_output_file = {"output-file", "Specify output file", "", true};
  const command_line::arg_descriptor<uint32_t> arg_log_level  = {"log-level",  "", log_level};
  const command_line::arg_descriptor<uint64_t> arg_block_stop = {"block-stop", "Stop at block number", block_stop};
  const command_line::arg_descriptor<bool>     arg_testnet_on = {
    "testnet"
      , "Run on testnet."
      , false
  };
  const command_line::arg_descriptor<std::string> arg_database = {
    "database", available_dbs.c_str(), default_db_type
  };
  const command_line::arg_descriptor<bool> arg_blocks_dat = {"blocksdat", "Output in blocks.dat format", blocks_dat};


  command_line::add_arg(desc_cmd_sett, command_line::arg_data_dir, default_data_path.string());
  command_line::add_arg(desc_cmd_sett, command_line::arg_testnet_data_dir, default_testnet_data_path.string());
  command_line::add_arg(desc_cmd_sett, arg_output_file);
  command_line::add_arg(desc_cmd_sett, arg_testnet_on);
  command_line::add_arg(desc_cmd_sett, arg_log_level);
  command_line::add_arg(desc_cmd_sett, arg_database);
  command_line::add_arg(desc_cmd_sett, arg_block_stop);
  command_line::add_arg(desc_cmd_sett, arg_blocks_dat);

  command_line::add_arg(desc_cmd_only, command_line::arg_help);

  po::options_description desc_options("Allowed options");
  desc_options.add(desc_cmd_only).add(desc_cmd_sett);

  po::variables_map vm;
  bool r = command_line::handle_error_helper(desc_options, [&]()
  {
    po::store(po::parse_command_line(argc, argv, desc_options), vm);
    po::notify(vm);
    return true;
  });
  if (! r)
    return 1;

  if (command_line::get_arg(vm, command_line::arg_help))
  {
    std::cout << "Monero '" << MONERO_RELEASE_NAME << "' (v" << MONERO_VERSION_FULL << ")" << ENDL << ENDL;
    std::cout << desc_options << std::endl;
    return 1;
  }

  log_level    = command_line::get_arg(vm, arg_log_level);
  block_stop = command_line::get_arg(vm, arg_block_stop);

  log_space::get_set_log_detalisation_level(true, log_level);
  log_space::log_singletone::add_logger(LOGGER_CONSOLE, NULL, NULL);
  LOG_PRINT_L0("Starting...");
  LOG_PRINT_L0("Setting log level = " << log_level);

  bool opt_testnet = command_line::get_arg(vm, arg_testnet_on);
  bool opt_blocks_dat = command_line::get_arg(vm, arg_blocks_dat);

  std::string m_config_folder;

  auto data_dir_arg = opt_testnet ? command_line::arg_testnet_data_dir : command_line::arg_data_dir;
  m_config_folder = command_line::get_arg(vm, data_dir_arg);

  std::string db_type = command_line::get_arg(vm, arg_database);
  if (db_types_all.count(db_type) == 0)
  {
    std::cerr << "Invalid database type: " << db_type << std::endl;
    return 1;
  }
#if !defined(BERKELEY_DB)
  if (db_type == "berkeley")
  {
    LOG_ERROR("BerkeleyDB support disabled.");
    return false;
  }
#endif

  if (command_line::has_arg(vm, arg_output_file))
    output_file_path = boost::filesystem::path(command_line::get_arg(vm, arg_output_file));
  else
    output_file_path = boost::filesystem::path(m_config_folder) / "export" / BLOCKCHAIN_RAW;
  LOG_PRINT_L0("Export output file: " << output_file_path.string());

  // If we wanted to use the memory pool, we would set up a fake_core.

#if SOURCE_DB == DB_MEMORY
  // blockchain_storage* core_storage = NULL;
  // tx_memory_pool m_mempool(*core_storage); // is this fake anyway? just passing in NULL! so m_mempool can't be used anyway, right?
  // core_storage = new blockchain_storage(&m_mempool);

  blockchain_storage* core_storage = new blockchain_storage(NULL);
  LOG_PRINT_L0("Initializing source blockchain (in-memory database)");
  r = core_storage->init(m_config_folder, opt_testnet);
#else
  // Use Blockchain instead of lower-level BlockchainDB for two reasons:
  // 1. Blockchain has the init() method for easy setup
  // 2. exporter needs to use get_current_blockchain_height(), get_block_id_by_height(), get_block_by_hash()
  //
  // cannot match blockchain_storage setup above with just one line,
  // e.g.
  //   Blockchain* core_storage = new Blockchain(NULL);
  // because unlike blockchain_storage constructor, which takes a pointer to
  // tx_memory_pool, Blockchain's constructor takes tx_memory_pool object.
  LOG_PRINT_L0("Initializing source blockchain (BlockchainDB)");
  Blockchain* core_storage = NULL;
  tx_memory_pool m_mempool(*core_storage);
  core_storage = new Blockchain(m_mempool);

  int db_flags = 0;

  BlockchainDB* db = nullptr;
  if (db_type == "lmdb")
  {
    db_flags |= MDB_RDONLY;
    db = new BlockchainLMDB();
  }
#if defined(BERKELEY_DB)
  else if (db_type == "berkeley")
    db = new BlockchainBDB();
#endif
  else
  {
    LOG_ERROR("Attempted to use non-existent database type: " << db_type);
    throw std::runtime_error("Attempting to use non-existent database type");
  }
  LOG_PRINT_L0("database: " << db_type);

  boost::filesystem::path folder(m_config_folder);
  folder /= db->get_db_name();
  const std::string filename = folder.string();

  LOG_PRINT_L0("Loading blockchain from folder " << filename << " ...");
  try
  {
    db->open(filename, db_flags);
  }
  catch (const std::exception& e)
  {
    LOG_PRINT_L0("Error opening database: " << e.what());
    return 1;
  }
  r = core_storage->init(db, opt_testnet);
#endif

  CHECK_AND_ASSERT_MES(r, false, "Failed to initialize source blockchain storage");
  LOG_PRINT_L0("Source blockchain storage initialized OK");
  LOG_PRINT_L0("Exporting blockchain raw data...");

  if (opt_blocks_dat)
  {
    BlocksdatFile blocksdat;
    r = blocksdat.store_blockchain_raw(core_storage, NULL, output_file_path, block_stop);
  }
  else
  {
    BootstrapFile bootstrap;
    r = bootstrap.store_blockchain_raw(core_storage, NULL, output_file_path, block_stop);
  }
  CHECK_AND_ASSERT_MES(r, false, "Failed to export blockchain raw data");
  LOG_PRINT_L0("Blockchain raw data exported OK");
}
