// Copyright (c) 2017-2020, 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
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// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//

#ifndef MONERO_DEVICE_TREZOR_H
#define MONERO_DEVICE_TREZOR_H

#include "trezor.hpp"
#include "device/device.hpp"

#ifdef WITH_DEVICE_TREZOR
#include <cstddef>
#include <string>
#include <boost/scope_exit.hpp>
#include <boost/thread/mutex.hpp>
#include <boost/thread/recursive_mutex.hpp>

#include "device/device_default.hpp"
#include "device/device_cold.hpp"
#include "cryptonote_config.h"
#include "device_trezor_base.hpp"
#endif

namespace hw {
namespace trezor {

  void register_all();
  void register_all(std::map<std::string, std::unique_ptr<device>> &registry);

#ifdef WITH_DEVICE_TREZOR
  class device_trezor;

  /**
   * Main device
   */
  class device_trezor : public hw::trezor::device_trezor_base, public hw::device_cold {
    protected:
      std::atomic<bool> m_live_refresh_in_progress;
      std::chrono::steady_clock::time_point m_last_live_refresh_time;
      std::unique_ptr<boost::thread> m_live_refresh_thread;
      std::atomic<bool> m_live_refresh_thread_running;
      bool m_live_refresh_enabled;
      size_t m_num_transations_to_sign;

      unsigned client_version();
      void transaction_versions_check(const ::tools::wallet2::unsigned_tx_set & unsigned_tx, hw::tx_aux_data & aux_data);
      void transaction_pre_check(std::shared_ptr<messages::monero::MoneroTransactionInitRequest> init_msg);
      void transaction_check(const protocol::tx::TData & tdata, const hw::tx_aux_data & aux_data);
      void device_state_initialize_unsafe() override;
      void live_refresh_start_unsafe();
      void live_refresh_finish_unsafe();
      void live_refresh_thread_main();

      /**
       * Signs particular transaction idx in the unsigned set, keeps state in the signer
       */
      virtual void tx_sign(wallet_shim * wallet,
                   const ::tools::wallet2::unsigned_tx_set & unsigned_tx,
                   size_t idx,
                   hw::tx_aux_data & aux_data,
                   std::shared_ptr<protocol::tx::Signer> & signer);

    public:
      device_trezor();
      virtual ~device_trezor() override;

      device_trezor(const device_trezor &device) = delete ;
      device_trezor& operator=(const device_trezor &device) = delete;

      explicit operator bool() const override {return true;}

      bool init() override;
      bool release() override;
      bool disconnect() override;

      device_protocol_t device_protocol() const override { return PROTOCOL_COLD; };

      bool  has_ki_cold_sync() const override { return true; }
      bool  has_tx_cold_sign() const override { return true; }
      void  set_network_type(cryptonote::network_type network_type) override { this->network_type = network_type; }
      void  set_live_refresh_enabled(bool enabled) { m_live_refresh_enabled = enabled; }
      bool  live_refresh_enabled() const { return m_live_refresh_enabled; }

      /* ======================================================================= */
      /*                             WALLET & ADDRESS                            */
      /* ======================================================================= */
      bool  get_public_address(cryptonote::account_public_address &pubkey) override;
      bool  get_secret_keys(crypto::secret_key &viewkey , crypto::secret_key &spendkey) override;
      void  display_address(const cryptonote::subaddress_index& index, const boost::optional<crypto::hash8> &payment_id) override;

      /* ======================================================================= */
      /*                              TREZOR PROTOCOL                            */
      /* ======================================================================= */

      /**
       * Get address. Throws.
       */
      std::shared_ptr<messages::monero::MoneroAddress> get_address(
          const boost::optional<cryptonote::subaddress_index> & subaddress = boost::none,
          const boost::optional<crypto::hash8> & payment_id = boost::none,
          bool show_address = false,
          const boost::optional<std::vector<uint32_t>> & path = boost::none,
          const boost::optional<cryptonote::network_type> & network_type = boost::none);

      /**
       * Get watch key from device. Throws.
       */
      std::shared_ptr<messages::monero::MoneroWatchKey> get_view_key(
          const boost::optional<std::vector<uint32_t>> & path = boost::none,
          const boost::optional<cryptonote::network_type> & network_type = boost::none);

      /**
       * Get_tx_key support check
       */
      bool is_get_tx_key_supported() const override;

      /**
       * Loads tx aux data
       */
      void load_tx_key_data(::hw::device_cold::tx_key_data_t & res, const std::string & tx_aux_data) override;

      /**
       * TX key load with the Trezor
       */
      void get_tx_key(
        std::vector<::crypto::secret_key> & tx_keys,
        const ::hw::device_cold::tx_key_data_t & tx_aux_data,
        const ::crypto::secret_key & view_key_priv) override;

      /**
       * Key image sync with the Trezor.
       */
      void ki_sync(wallet_shim * wallet,
                   const std::vector<::tools::wallet2::transfer_details> & transfers,
                   hw::device_cold::exported_key_image & ski) override;

      bool is_live_refresh_supported() const override;

      bool is_live_refresh_enabled() const;

      bool has_ki_live_refresh() const override;

      void live_refresh_start() override;

      void live_refresh(
          const ::crypto::secret_key & view_key_priv,
          const crypto::public_key& out_key,
          const crypto::key_derivation& recv_derivation,
          size_t real_output_index,
          const cryptonote::subaddress_index& received_index,
          cryptonote::keypair& in_ephemeral,
          crypto::key_image& ki
          ) override;

      void live_refresh_finish() override;

      /**
       * Letting device know the KI computation started / ended.
       * During refresh
       */
      void computing_key_images(bool started) override;

      /**
       * Implements hw::device interface
       * called from generate_key_image_helper_precomp()
       */
      bool compute_key_image(
          const ::cryptonote::account_keys& ack,
          const ::crypto::public_key& out_key,
          const ::crypto::key_derivation& recv_derivation,
          size_t real_output_index,
          const ::cryptonote::subaddress_index& received_index,
          ::cryptonote::keypair& in_ephemeral,
          ::crypto::key_image& ki) override;

      /**
       * Signs unsigned transaction with the Trezor.
       */
      void tx_sign(wallet_shim * wallet,
                   const ::tools::wallet2::unsigned_tx_set & unsigned_tx,
                   ::tools::wallet2::signed_tx_set & signed_tx,
                   hw::tx_aux_data & aux_data) override;
    };

#endif

}
}
#endif //MONERO_DEVICE_TREZOR_H
