// Copyright (c) 2011-2016 The Cryptonote developers
// Distributed under the MIT/X11 software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.

#pragma once

#include <cstdint>
#include <string>
#include <vector>
#include <boost/utility.hpp>
#include "../CryptoNoteConfig.h"
#include "../crypto/hash.h"
#include "../Logging/LoggerRef.h"
#include "CryptoNoteBasic.h"
#include "Difficulty.h"

namespace CryptoNote {

class AccountBase;

class Currency {
public:
  uint64_t maxBlockHeight() const { return m_maxBlockHeight; }
  size_t maxBlockBlobSize() const { return m_maxBlockBlobSize; }
  size_t maxTxSize() const { return m_maxTxSize; }
  uint64_t publicAddressBase58Prefix() const { return m_publicAddressBase58Prefix; }
  size_t minedMoneyUnlockWindow() const { return m_minedMoneyUnlockWindow; }

  size_t timestampCheckWindow() const { return m_timestampCheckWindow; }
  uint64_t blockFutureTimeLimit() const { return m_blockFutureTimeLimit; }

  uint64_t moneySupply() const { return m_moneySupply; }
  unsigned int emissionSpeedFactor() const { return m_emissionSpeedFactor; }

  size_t rewardBlocksWindow() const { return m_rewardBlocksWindow; }
  size_t blockGrantedFullRewardZone() const { return m_blockGrantedFullRewardZone; }
  size_t minerTxBlobReservedSize() const { return m_minerTxBlobReservedSize; }

  size_t numberOfDecimalPlaces() const { return m_numberOfDecimalPlaces; }
  uint64_t coin() const { return m_coin; }

  uint64_t minimumFee() const { return m_mininumFee; }
  uint64_t defaultDustThreshold() const { return m_defaultDustThreshold; }

  uint64_t difficultyTarget() const { return m_difficultyTarget; }
  size_t difficultyWindow() const { return m_difficultyWindow; }
  size_t difficultyLag() const { return m_difficultyLag; }
  size_t difficultyCut() const { return m_difficultyCut; }
  size_t difficultyBlocksCount() const { return m_difficultyWindow + m_difficultyLag; }

  size_t maxBlockSizeInitial() const { return m_maxBlockSizeInitial; }
  uint64_t maxBlockSizeGrowthSpeedNumerator() const { return m_maxBlockSizeGrowthSpeedNumerator; }
  uint64_t maxBlockSizeGrowthSpeedDenominator() const { return m_maxBlockSizeGrowthSpeedDenominator; }

  uint64_t lockedTxAllowedDeltaSeconds() const { return m_lockedTxAllowedDeltaSeconds; }
  size_t lockedTxAllowedDeltaBlocks() const { return m_lockedTxAllowedDeltaBlocks; }

  uint64_t mempoolTxLiveTime() const { return m_mempoolTxLiveTime; }
  uint64_t mempoolTxFromAltBlockLiveTime() const { return m_mempoolTxFromAltBlockLiveTime; }
  uint64_t numberOfPeriodsToForgetTxDeletedFromPool() const { return m_numberOfPeriodsToForgetTxDeletedFromPool; }

  size_t fusionTxMaxSize() const { return m_fusionTxMaxSize; }
  size_t fusionTxMinInputCount() const { return m_fusionTxMinInputCount; }
  size_t fusionTxMinInOutCountRatio() const { return m_fusionTxMinInOutCountRatio; }

  const std::string& blocksFileName() const { return m_blocksFileName; }
  const std::string& blocksCacheFileName() const { return m_blocksCacheFileName; }
  const std::string& blockIndexesFileName() const { return m_blockIndexesFileName; }
  const std::string& txPoolFileName() const { return m_txPoolFileName; }
  const std::string& blockchinIndicesFileName() const { return m_blockchinIndicesFileName; }

  bool isTestnet() const { return m_testnet; }

  const Block& genesisBlock() const { return m_genesisBlock; }
  const Crypto::Hash& genesisBlockHash() const { return m_genesisBlockHash; }

  bool getBlockReward(size_t medianSize, size_t currentBlockSize, uint64_t alreadyGeneratedCoins, uint64_t fee,
    uint64_t& reward, int64_t& emissionChange) const;
  size_t maxBlockCumulativeSize(uint64_t height) const;

  bool constructMinerTx(uint32_t height, size_t medianSize, uint64_t alreadyGeneratedCoins, size_t currentBlockSize,
    uint64_t fee, const AccountPublicAddress& minerAddress, Transaction& tx,
    const BinaryArray& extraNonce = BinaryArray(), size_t maxOuts = 1) const;

  bool isFusionTransaction(const Transaction& transaction) const;
  bool isFusionTransaction(const Transaction& transaction, size_t size) const;
  bool isFusionTransaction(const std::vector<uint64_t>& inputsAmounts, const std::vector<uint64_t>& outputsAmounts, size_t size) const;
  bool isAmountApplicableInFusionTransactionInput(uint64_t amount, uint64_t threshold) const;
  bool isAmountApplicableInFusionTransactionInput(uint64_t amount, uint64_t threshold, uint8_t& amountPowerOfTen) const;

  std::string accountAddressAsString(const AccountBase& account) const;
  std::string accountAddressAsString(const AccountPublicAddress& accountPublicAddress) const;
  bool parseAccountAddressString(const std::string& str, AccountPublicAddress& addr) const;

  std::string formatAmount(uint64_t amount) const;
  std::string formatAmount(int64_t amount) const;
  bool parseAmount(const std::string& str, uint64_t& amount) const;

  difficulty_type nextDifficulty(std::vector<uint64_t> timestamps, std::vector<difficulty_type> cumulativeDifficulties) const;
  bool checkProofOfWork(Crypto::cn_context& context, const Block& block, difficulty_type currentDiffic, Crypto::Hash& proofOfWork) const;

  size_t getApproximateMaximumInputCount(size_t transactionSize, size_t outputCount, size_t mixinCount) const;

private:
  Currency(Logging::ILogger& log) : logger(log, "currency") {
  }

  bool init();

  bool generateGenesisBlock();

private:
  uint64_t m_maxBlockHeight;
  size_t m_maxBlockBlobSize;
  size_t m_maxTxSize;
  uint64_t m_publicAddressBase58Prefix;
  size_t m_minedMoneyUnlockWindow;

  size_t m_timestampCheckWindow;
  uint64_t m_blockFutureTimeLimit;

  uint64_t m_moneySupply;
  unsigned int m_emissionSpeedFactor;

  size_t m_rewardBlocksWindow;
  size_t m_blockGrantedFullRewardZone;
  size_t m_minerTxBlobReservedSize;

  size_t m_numberOfDecimalPlaces;
  uint64_t m_coin;

  uint64_t m_mininumFee;
  uint64_t m_defaultDustThreshold;

  uint64_t m_difficultyTarget;
  size_t m_difficultyWindow;
  size_t m_difficultyLag;
  size_t m_difficultyCut;

  size_t m_maxBlockSizeInitial;
  uint64_t m_maxBlockSizeGrowthSpeedNumerator;
  uint64_t m_maxBlockSizeGrowthSpeedDenominator;

  uint64_t m_lockedTxAllowedDeltaSeconds;
  size_t m_lockedTxAllowedDeltaBlocks;

  uint64_t m_mempoolTxLiveTime;
  uint64_t m_mempoolTxFromAltBlockLiveTime;
  uint64_t m_numberOfPeriodsToForgetTxDeletedFromPool;

  size_t m_fusionTxMaxSize;
  size_t m_fusionTxMinInputCount;
  size_t m_fusionTxMinInOutCountRatio;

  std::string m_blocksFileName;
  std::string m_blocksCacheFileName;
  std::string m_blockIndexesFileName;
  std::string m_txPoolFileName;
  std::string m_blockchinIndicesFileName;

  static const std::vector<uint64_t> PRETTY_AMOUNTS;

  bool m_testnet;

  Block m_genesisBlock;
  Crypto::Hash m_genesisBlockHash;

  Logging::LoggerRef logger;

  friend class CurrencyBuilder;
};

class CurrencyBuilder : boost::noncopyable {
public:
  CurrencyBuilder(Logging::ILogger& log);

  Currency currency() {
    if (!m_currency.init()) {
      throw std::runtime_error("Failed to initialize currency object");
    }
    return m_currency;
  }

  Transaction generateGenesisTransaction();

  CurrencyBuilder& maxBlockNumber(uint64_t val) { m_currency.m_maxBlockHeight = val; return *this; }
  CurrencyBuilder& maxBlockBlobSize(size_t val) { m_currency.m_maxBlockBlobSize = val; return *this; }
  CurrencyBuilder& maxTxSize(size_t val) { m_currency.m_maxTxSize = val; return *this; }
  CurrencyBuilder& publicAddressBase58Prefix(uint64_t val) { m_currency.m_publicAddressBase58Prefix = val; return *this; }
  CurrencyBuilder& minedMoneyUnlockWindow(size_t val) { m_currency.m_minedMoneyUnlockWindow = val; return *this; }

  CurrencyBuilder& timestampCheckWindow(size_t val) { m_currency.m_timestampCheckWindow = val; return *this; }
  CurrencyBuilder& blockFutureTimeLimit(uint64_t val) { m_currency.m_blockFutureTimeLimit = val; return *this; }

  CurrencyBuilder& moneySupply(uint64_t val) { m_currency.m_moneySupply = val; return *this; }
  CurrencyBuilder& emissionSpeedFactor(unsigned int val);

  CurrencyBuilder& rewardBlocksWindow(size_t val) { m_currency.m_rewardBlocksWindow = val; return *this; }
  CurrencyBuilder& blockGrantedFullRewardZone(size_t val) { m_currency.m_blockGrantedFullRewardZone = val; return *this; }
  CurrencyBuilder& minerTxBlobReservedSize(size_t val) { m_currency.m_minerTxBlobReservedSize = val; return *this; }

  CurrencyBuilder& numberOfDecimalPlaces(size_t val);

  CurrencyBuilder& mininumFee(uint64_t val) { m_currency.m_mininumFee = val; return *this; }
  CurrencyBuilder& defaultDustThreshold(uint64_t val) { m_currency.m_defaultDustThreshold = val; return *this; }

  CurrencyBuilder& difficultyTarget(uint64_t val) { m_currency.m_difficultyTarget = val; return *this; }
  CurrencyBuilder& difficultyWindow(size_t val);
  CurrencyBuilder& difficultyLag(size_t val) { m_currency.m_difficultyLag = val; return *this; }
  CurrencyBuilder& difficultyCut(size_t val) { m_currency.m_difficultyCut = val; return *this; }

  CurrencyBuilder& maxBlockSizeInitial(size_t val) { m_currency.m_maxBlockSizeInitial = val; return *this; }
  CurrencyBuilder& maxBlockSizeGrowthSpeedNumerator(uint64_t val) { m_currency.m_maxBlockSizeGrowthSpeedNumerator = val; return *this; }
  CurrencyBuilder& maxBlockSizeGrowthSpeedDenominator(uint64_t val) { m_currency.m_maxBlockSizeGrowthSpeedDenominator = val; return *this; }

  CurrencyBuilder& lockedTxAllowedDeltaSeconds(uint64_t val) { m_currency.m_lockedTxAllowedDeltaSeconds = val; return *this; }
  CurrencyBuilder& lockedTxAllowedDeltaBlocks(size_t val) { m_currency.m_lockedTxAllowedDeltaBlocks = val; return *this; }

  CurrencyBuilder& mempoolTxLiveTime(uint64_t val) { m_currency.m_mempoolTxLiveTime = val; return *this; }
  CurrencyBuilder& mempoolTxFromAltBlockLiveTime(uint64_t val) { m_currency.m_mempoolTxFromAltBlockLiveTime = val; return *this; }
  CurrencyBuilder& numberOfPeriodsToForgetTxDeletedFromPool(uint64_t val) { m_currency.m_numberOfPeriodsToForgetTxDeletedFromPool = val; return *this; }

  CurrencyBuilder& fusionTxMaxSize(size_t val) { m_currency.m_fusionTxMaxSize = val; return *this; }
  CurrencyBuilder& fusionTxMinInputCount(size_t val) { m_currency.m_fusionTxMinInputCount = val; return *this; }
  CurrencyBuilder& fusionTxMinInOutCountRatio(size_t val) { m_currency.m_fusionTxMinInOutCountRatio = val; return *this; }

  CurrencyBuilder& blocksFileName(const std::string& val) { m_currency.m_blocksFileName = val; return *this; }
  CurrencyBuilder& blocksCacheFileName(const std::string& val) { m_currency.m_blocksCacheFileName = val; return *this; }
  CurrencyBuilder& blockIndexesFileName(const std::string& val) { m_currency.m_blockIndexesFileName = val; return *this; }
  CurrencyBuilder& txPoolFileName(const std::string& val) { m_currency.m_txPoolFileName = val; return *this; }
  CurrencyBuilder& blockchinIndicesFileName(const std::string& val) { m_currency.m_blockchinIndicesFileName = val; return *this; }
  
  CurrencyBuilder& testnet(bool val) { m_currency.m_testnet = val; return *this; }

private:
  Currency m_currency;
};

}