// Copyright (c) 2010 Satoshi Nakamoto
// Copyright (c) 2009-2016 The Starwels developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.

#include "chainparams.h"
#include "consensus/merkle.h"

#include "tinyformat.h"
#include "util.h"
#include "utilstrencodings.h"

#include <assert.h>

#include "chainparamsseeds.h"

static CBlock CreateGenesisBlock(const char* pszTimestamp, const CScript& genesisOutputScript, uint32_t nTime, uint32_t nNonce, uint32_t nBits, int32_t nVersion, const CAmount& genesisReward)
{
    CMutableTransaction txNew;
    txNew.nVersion = 1;
    txNew.vin.resize(1);
    txNew.vout.resize(1);
    txNew.vin[0].scriptSig = CScript() << 486604799 << CScriptNum(4) << std::vector<unsigned char>((const unsigned char*)pszTimestamp, (const unsigned char*)pszTimestamp + strlen(pszTimestamp));
    txNew.vout[0].nValue = genesisReward;
    txNew.vout[0].scriptPubKey = genesisOutputScript;

    CBlock genesis;
    genesis.nTime    = nTime;
    genesis.nBits    = nBits;
    genesis.nNonce   = nNonce;
    genesis.nVersion = nVersion;
    genesis.vtx.push_back(MakeTransactionRef(std::move(txNew)));
    genesis.hashPrevBlock.SetNull();
    genesis.hashMerkleRoot = BlockMerkleRoot(genesis);
    return genesis;
}

static CBlock CreateGenesisBlock(uint32_t nTime, uint32_t nNonce, uint32_t nBits, int32_t nVersion, const CAmount& genesisReward)
{
    const char* pszTimestamp = "January/20/2017 45th President of the United States of America Donald Trump";
    const CScript genesisOutputScript = CScript() << ParseHex("04ea1e6e7cace7b63b88949a3f43f0144b0032eaa9ee6c9627fc58bfb51163a262542fd8cdd3cc40186a1aeeb4857c15954e6f15f789bfdcf9cec59863cdfc6e14") << OP_CHECKSIG;
    return CreateGenesisBlock(pszTimestamp, genesisOutputScript, nTime, nNonce, nBits, nVersion, genesisReward);
}

void CChainParams::UpdateVersionBitsParameters(Consensus::DeploymentPos d, int64_t nStartTime, int64_t nTimeout)
{
    consensus.vDeployments[d].nStartTime = nStartTime;
    consensus.vDeployments[d].nTimeout = nTimeout;
}

/**
 * Main Network
 */

/**
 * What makes a good checkpoint block?
 * + Is surrounded by blocks with reasonable timestamps
 *   (no blocks before with a timestamp after, none after with
 *    timestamp before)
 * + Contains no strange transactions
 */
class CMainParams : public CChainParams {
public:
    CMainParams() {
        strNetworkID = "main";
        consensus.nSubsidyHalvingInterval = 210000;
        consensus.BIP34Height = 227931;
        consensus.BIP34Hash = uint256S("0x00000000ac6a39893714f4240301f40abff1afcdcaf51d2f40ce6675a73f0961");
        consensus.BIP65Height = 388381;
        consensus.BIP66Height = 363725;
        consensus.powLimit = uint256S("00000000ffffffffffffffffffffffffffffffffffffffffffffffffffffffff");
        consensus.nPowTargetTimespan = 2 * 24 * 84;
        consensus.nPowTargetSpacing = 2; // 2 second
        consensus.fPowAllowMinDifficultyBlocks = false;
        consensus.fPowNoRetargeting = false;
        consensus.nRuleChangeActivationThreshold = 1916; // 95% of 2016
        consensus.nMinerConfirmationWindow = 2016; // nPowTargetTimespan / nPowTargetSpacing
        consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].bit = 28;
        consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].nStartTime = 1498867200; //  July 1 Saturday, 2017
        consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].nTimeout = 1530403200; // July 1 Sunday, 2018

        // Deployment of BIP68, BIP112, and BIP113.
        consensus.vDeployments[Consensus::DEPLOYMENT_CSV].bit = 0;
        consensus.vDeployments[Consensus::DEPLOYMENT_CSV].nStartTime = 1501545600; // August 1 Tuesday, 2017
        consensus.vDeployments[Consensus::DEPLOYMENT_CSV].nTimeout = 1533081600; // August 1 Wednesday, 2018

        // Deployment of SegWit (BIP141, BIP143, and BIP147)
        consensus.vDeployments[Consensus::DEPLOYMENT_SEGWIT].bit = 1;
        consensus.vDeployments[Consensus::DEPLOYMENT_SEGWIT].nStartTime = 1504224000; // September 1 Friday, 2017
        consensus.vDeployments[Consensus::DEPLOYMENT_SEGWIT].nTimeout = 1535760000; // September 1 Saturday, 2018

        // The best chain should have at least this much work.
        consensus.nMinimumChainWork = uint256S("0x0000000000000000000000000000000000000000000000000006550f67b8b239");

        // By default assume that the signatures in ancestors of this block are valid.
        consensus.defaultAssumeValid = uint256S("0x00000000764077b29d13e1cb2484f028a24ef2a44486b6e5d3cb17eb4716c465"); // 262144

        /**
         * The message start string is designed to be unlikely to occur in normal data.
         * The characters are rarely used upper ASCII, not valid as UTF-8, and produce
         * a large 32-bit integer with any alignment.
         */
        pchMessageStart[0] = 0xf9;
        pchMessageStart[1] = 0xbe;
        pchMessageStart[2] = 0xb4;
        pchMessageStart[3] = 0xd9;
        nDefaultPort = 8343;
        nPruneAfterHeight = 100000;

        genesis = CreateGenesisBlock(1484870400, 2121032621, 0x1d00ffff, 1, 50 * COIN);
        consensus.hashGenesisBlock = genesis.GetHash();
        assert(consensus.hashGenesisBlock == uint256S("0x000000003d69a915e9da53348c5c272978bb743442e3a6341c11061c125811a2"));
        assert(genesis.hashMerkleRoot == uint256S("0x7e2c59b1404833991962e7e6d95a1d4f81f03fffeaf79c0d25d97d24182db485"));

        // Note that of those with the service bits flag, most only support a subset of possible options

        base58Prefixes[PUBKEY_ADDRESS] = std::vector<unsigned char>(1,0);
        base58Prefixes[SCRIPT_ADDRESS] = std::vector<unsigned char>(1,5);
        base58Prefixes[SECRET_KEY] =     std::vector<unsigned char>(1,128);
        base58Prefixes[EXT_PUBLIC_KEY] = {0x04, 0x88, 0xB2, 0x1E};
        base58Prefixes[EXT_SECRET_KEY] = {0x04, 0x88, 0xAD, 0xE4};

        vFixedSeeds = std::vector<SeedSpec6>(pnSeed6_main, pnSeed6_main + ARRAYLEN(pnSeed6_main));

        fDefaultConsistencyChecks = false;
        fRequireStandard = true;
        fMineBlocksOnDemand = false;

        checkpointData = (CCheckpointData) {
            {
                {1024, uint256S("0x00000000fb559851169e0d915093533d31af0d963e06a7d80a20496f9cfd2b9f")},
                {2048, uint256S("0x00000000a753b360bb5d54908378d999132fbeb415279ef530b397ae249cbef4")},
                {4096, uint256S("0x00000000d7674ad1e7703e7ba02b7611c12fe74de27b6a414cf6e906cc3599e9")},
                {8192, uint256S("0x000000007039ae6930925c9c6297835642ea5a4d6f32cef2f6b84867e049fff8")},
                {32768, uint256S("0x00000000cc19cff47d676ad56594e695ac96a1d2781a83a5fd1a7702b98a9a65")},
                {65536, uint256S("0x00000000c6814c6715cda6f76b08b967abc0ea70aa3f8db8e8c62206477cb749")},
                {131072, uint256S("0x00000000dbff9cae44489b3c02bbd556b67db5e3d21318c35cca0b6c361e6944")},
            }
        };

        chainTxData = ChainTxData{
            // Data as of block 00000000764077b29d13e1cb2484f028a24ef2a44486b6e5d3cb17eb4716c465 (height 262144).
            1530692464, // * UNIX timestamp of last known number of transactions
            262230,       // * total number of transactions between genesis and that timestamp
                          //   (the tx=... number in the SetBestChain debug.log lines)
            3.1            // * estimated number of transactions per second after that timestamp
        };
    }
};

/**
 * Starwels Ai Main Network
 */
class CTestNetParams : public CChainParams {
public:
    CTestNetParams() {
        strNetworkID = "main";
        consensus.nSubsidyHalvingInterval = 210000;
        consensus.BIP34Height = 227931;
        consensus.BIP34Hash = uint256S("0x00000000ac6a39893714f4240301f40abff1afcdcaf51d2f40ce6675a73f0961");
        consensus.BIP65Height = 388381;
        consensus.BIP66Height = 363725;
        consensus.powLimit = uint256S("00000000ffffffffffffffffffffffffffffffffffffffffffffffffffffffff");
        consensus.nPowTargetTimespan = 2 * 24 * 84;
        consensus.nPowTargetSpacing = 2; // 2 second
        consensus.fPowAllowMinDifficultyBlocks = false;
        consensus.fPowNoRetargeting = false;
        consensus.nRuleChangeActivationThreshold = 1916; // 95% of 2016
        consensus.nMinerConfirmationWindow = 2016; // nPowTargetTimespan / nPowTargetSpacing
        consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].bit = 28;
        consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].nStartTime = 1498867200; //  July 1 Saturday, 2017
        consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].nTimeout = 1530403200; // July 1 Sunday, 2018

        // Deployment of BIP68, BIP112, and BIP113.
        consensus.vDeployments[Consensus::DEPLOYMENT_CSV].bit = 0;
        consensus.vDeployments[Consensus::DEPLOYMENT_CSV].nStartTime = 1501545600; // August 1 Tuesday, 2017
        consensus.vDeployments[Consensus::DEPLOYMENT_CSV].nTimeout = 1533081600; // August 1 Wednesday, 2018

        // Deployment of SegWit (BIP141, BIP143, and BIP147)
        consensus.vDeployments[Consensus::DEPLOYMENT_SEGWIT].bit = 1;
        consensus.vDeployments[Consensus::DEPLOYMENT_SEGWIT].nStartTime = 1504224000; // September 1 Friday, 2017
        consensus.vDeployments[Consensus::DEPLOYMENT_SEGWIT].nTimeout = 1535760000; // September 1 Saturday, 2018

        // The best chain should have at least this much work.
        consensus.nMinimumChainWork = uint256S("0x0000000000000000000000000000000000000000000000000000100110011001");

        // By default assume that the signatures in ancestors of this block are valid.
        consensus.defaultAssumeValid = uint256S("0x00000000d7674ad1e7703e7ba02b7611c12fe74de27b6a414cf6e906cc3599e9"); // 4096

        pchMessageStart[0] = 0xf9;
        pchMessageStart[1] = 0xbe;
        pchMessageStart[2] = 0xb4;
        pchMessageStart[3] = 0xd9;
        nDefaultPort = 8333;
        nPruneAfterHeight = 100000;

        genesis = CreateGenesisBlock(1484870400, 2121032621, 0x1d00ffff, 1, 50 * COIN);
        consensus.hashGenesisBlock = genesis.GetHash();
        assert(consensus.hashGenesisBlock == uint256S("0x000000003d69a915e9da53348c5c272978bb743442e3a6341c11061c125811a2"));
        assert(genesis.hashMerkleRoot == uint256S("0x7e2c59b1404833991962e7e6d95a1d4f81f03fffeaf79c0d25d97d24182db485"));

        vFixedSeeds.clear();
        vSeeds.clear();
        // nodes with support for servicebits filtering should be at the top

        base58Prefixes[PUBKEY_ADDRESS] = std::vector<unsigned char>(1,0);
        base58Prefixes[SCRIPT_ADDRESS] = std::vector<unsigned char>(1,5);
        base58Prefixes[SECRET_KEY] =     std::vector<unsigned char>(1,128);
        base58Prefixes[EXT_PUBLIC_KEY] = {0x04, 0x88, 0xB2, 0x1E};
        base58Prefixes[EXT_SECRET_KEY] = {0x04, 0x88, 0xAD, 0xE4};

        vFixedSeeds = std::vector<SeedSpec6>(pnSeed6_main, pnSeed6_main + ARRAYLEN(pnSeed6_main));

        fDefaultConsistencyChecks = false;
        fRequireStandard = true;
        fMineBlocksOnDemand = false;

        checkpointData = (CCheckpointData) {
            {
                {1024, uint256S("0x00000000fb559851169e0d915093533d31af0d963e06a7d80a20496f9cfd2b9f")},
                {2048, uint256S("0x00000000a753b360bb5d54908378d999132fbeb415279ef530b397ae249cbef4")},
            }
        };

        chainTxData = ChainTxData{
            // Data as of block 00000000d7674ad1e7703e7ba02b7611c12fe74de27b6a414cf6e906cc3599e9 (height 4096).
            1529914513,  // * UNIX timestamp of last known number of transactions
            4172,         // * total number of transactions between genesis and that timestamp
                           //   (the tx=... number in the SetBestChain debug.log lines)
            3.1             // * estimated number of transactions per second after that timestamp
        };

    }
};

/**
 * Regression test
 */
class CRegTestParams : public CChainParams {
public:
    CRegTestParams() {
        strNetworkID = "regtest";
        consensus.nSubsidyHalvingInterval = 150;
        consensus.BIP34Height = 100000000; // BIP34 has not activated on regtest (far in the future so block v1 are not rejected in tests)
        consensus.BIP34Hash = uint256();
        consensus.BIP65Height = 1351; // BIP65 activated on regtest (Used in rpc activation tests)
        consensus.BIP66Height = 1251; // BIP66 activated on regtest (Used in rpc activation tests)
        consensus.powLimit = uint256S("7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff");
        consensus.nPowTargetTimespan = 2 * 24 * 84;
        consensus.nPowTargetSpacing = 2; // 2 second
        consensus.fPowAllowMinDifficultyBlocks = true;
        consensus.fPowNoRetargeting = true;
        consensus.nRuleChangeActivationThreshold = 108; // 75% for testchains
        consensus.nMinerConfirmationWindow = 144; // Faster than normal for regtest (144 instead of 2016)
        consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].bit = 28;
        consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].nStartTime = 0;
        consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].nTimeout = 999999999999ULL;
        consensus.vDeployments[Consensus::DEPLOYMENT_CSV].bit = 0;
        consensus.vDeployments[Consensus::DEPLOYMENT_CSV].nStartTime = 0;
        consensus.vDeployments[Consensus::DEPLOYMENT_CSV].nTimeout = 999999999999ULL;
        consensus.vDeployments[Consensus::DEPLOYMENT_SEGWIT].bit = 1;
        consensus.vDeployments[Consensus::DEPLOYMENT_SEGWIT].nStartTime = 0;
        consensus.vDeployments[Consensus::DEPLOYMENT_SEGWIT].nTimeout = 999999999999ULL;

        // The best chain should have at least this much work.
        consensus.nMinimumChainWork = uint256S("0x00");

        // By default assume that the signatures in ancestors of this block are valid.
        consensus.defaultAssumeValid = uint256S("0x00");

        pchMessageStart[0] = 0xfa;
        pchMessageStart[1] = 0xbf;
        pchMessageStart[2] = 0xb5;
        pchMessageStart[3] = 0xda;
        nDefaultPort = 18444;
        nPruneAfterHeight = 1000;

        genesis = CreateGenesisBlock(1484956800, 0, 0x207fffff, 1, 50 * COIN);
        consensus.hashGenesisBlock = genesis.GetHash();
        assert(consensus.hashGenesisBlock == uint256S("0x79a6a4d5e19d4e5c6783691ba9ad75c7c352f906275b93dcad27ea0c3017ec80"));
        assert(genesis.hashMerkleRoot == uint256S("0x7e2c59b1404833991962e7e6d95a1d4f81f03fffeaf79c0d25d97d24182db485"));

        vFixedSeeds.clear(); //!< Regtest mode doesn't have any fixed seeds.
        vSeeds.clear();      //!< Regtest mode doesn't have any DNS seeds.

        fDefaultConsistencyChecks = true;
        fRequireStandard = false;
        fMineBlocksOnDemand = true;

        checkpointData = (CCheckpointData) {
            {
                {0, uint256S("79a6a4d5e19d4e5c6783691ba9ad75c7c352f906275b93dcad27ea0c3017ec80")},
            }
        };

        chainTxData = ChainTxData{
            0,
            0,
            0
        };

        base58Prefixes[PUBKEY_ADDRESS] = std::vector<unsigned char>(1,111);
        base58Prefixes[SCRIPT_ADDRESS] = std::vector<unsigned char>(1,196);
        base58Prefixes[SECRET_KEY] =     std::vector<unsigned char>(1,239);
        base58Prefixes[EXT_PUBLIC_KEY] = {0x04, 0x35, 0x87, 0xCF};
        base58Prefixes[EXT_SECRET_KEY] = {0x04, 0x35, 0x83, 0x94};
    }
};

static std::unique_ptr<CChainParams> globalChainParams;

const CChainParams &Params() {
    assert(globalChainParams);
    return *globalChainParams;
}

std::unique_ptr<CChainParams> CreateChainParams(const std::string& chain)
{
    if (chain == CBaseChainParams::MAIN)
        return std::unique_ptr<CChainParams>(new CMainParams());
    else if (chain == CBaseChainParams::AI)
        return std::unique_ptr<CChainParams>(new CTestNetParams());
    else if (chain == CBaseChainParams::REGTEST)
        return std::unique_ptr<CChainParams>(new CRegTestParams());
    throw std::runtime_error(strprintf("%s: Unknown chain %s.", __func__, chain));
}

void SelectParams(const std::string& network)
{
    SelectBaseParams(network);
    globalChainParams = CreateChainParams(network);
}

void UpdateVersionBitsParameters(Consensus::DeploymentPos d, int64_t nStartTime, int64_t nTimeout)
{
    globalChainParams->UpdateVersionBitsParameters(d, nStartTime, nTimeout);
}