// Copyright (c) 2017-2018, 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.
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// 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.
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// 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
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#pragma once

#include <string>
#include <boost/thread/mutex.hpp>
#include "include_base_utils.h"
#include "net/http_client.h"

namespace tools
{

class NodeRPCProxy
{
public:
  NodeRPCProxy(epee::net_utils::http::http_simple_client &http_client, boost::mutex &mutex);

  void invalidate();

  boost::optional<std::string> get_rpc_version(uint32_t &version) const;
  boost::optional<std::string> get_height(uint64_t &height) const;
  void set_height(uint64_t h);
  boost::optional<std::string> get_target_height(uint64_t &height) const;
  boost::optional<std::string> get_block_size_limit(uint64_t &block_size_limit) const;
  boost::optional<std::string> get_earliest_height(uint8_t version, uint64_t &earliest_height) const;
  boost::optional<std::string> get_dynamic_per_kb_fee_estimate(uint64_t grace_blocks, uint64_t &fee) const;

private:
  boost::optional<std::string> get_info() const;

  epee::net_utils::http::http_simple_client &m_http_client;
  boost::mutex &m_daemon_rpc_mutex;

  mutable uint64_t m_height;
  mutable uint64_t m_earliest_height[256];
  mutable uint64_t m_dynamic_per_kb_fee_estimate;
  mutable uint64_t m_dynamic_per_kb_fee_estimate_cached_height;
  mutable uint64_t m_dynamic_per_kb_fee_estimate_grace_blocks;
  mutable uint32_t m_rpc_version;
  mutable uint64_t m_target_height;
  mutable uint64_t m_block_size_limit;
  mutable time_t m_get_info_time;
};

}