// Copyright (c) 2010 Satoshi Nakamoto

// Copyright (c) 2009-present The Bitcoin Core developers

// Distributed under the MIT software license, see the accompanying

// file COPYING or http://www.opensource.org/licenses/mit-license.php.

#include <chainparamsbase.h>

#include <common/args.h>

#include <crypto/hex_base.h>

#include <kernel/signet.h>

#include <tinyformat.h>

#include <util/chaintype.h>

#include <util/strencodings.h>

#include <cassert>

void SetupChainParamsBaseOptions(ArgsManager& argsman)

{

    argsman.AddArg("-chain=<chain>", "Use the chain <chain> (default: main). Allowed values: " LIST_CHAIN_NAMES, ArgsManager::ALLOW_ANY, OptionsCategory::CHAINPARAMS);

    argsman.AddArg("-regtest", "Enter regression test mode, which uses a special chain in which blocks can be solved instantly. "

                 "This is intended for regression testing tools and app development. Equivalent to -chain=regtest.", ArgsManager::ALLOW_ANY | ArgsManager::DEBUG_ONLY, OptionsCategory::CHAINPARAMS);

    argsman.AddArg("-testactivationheight=name@height.", "Set the activation height of 'name' (segwit, bip34, dersig, cltv, csv). (test-only)", ArgsManager::ALLOW_ANY | ArgsManager::DEBUG_ONLY, OptionsCategory::DEBUG_TEST);

    argsman.AddArg("-testnet", "Use the testnet3 chain. Equivalent to -chain=test. Support for testnet3 is deprecated and will be removed in an upcoming release. Consider moving to testnet4 now by using -testnet4.", ArgsManager::ALLOW_ANY, OptionsCategory::CHAINPARAMS);

    argsman.AddArg("-testnet4", "Use the testnet4 chain. Equivalent to -chain=testnet4.", ArgsManager::ALLOW_ANY, OptionsCategory::CHAINPARAMS);

    argsman.AddArg("-vbparams=deployment:start:end[:min_activation_height]", "Use given start/end times and min_activation_height for specified version bits deployment (test-only)", ArgsManager::ALLOW_ANY | ArgsManager::DEBUG_ONLY, OptionsCategory::CHAINPARAMS);

    argsman.AddArg("-signet", "Use the signet chain. Equivalent to -chain=signet. Note that the network is defined by the -signetchallenge parameter", ArgsManager::ALLOW_ANY, OptionsCategory::CHAINPARAMS);

    argsman.AddArg("-signetchallenge", "Blocks must satisfy the given script to be considered valid (only for signet networks; defaults to the global default signet test network challenge)", ArgsManager::ALLOW_ANY | ArgsManager::DISALLOW_NEGATION, OptionsCategory::CHAINPARAMS);

    argsman.AddArg("-signetseednode", "Specify a seed node for the signet network, in the hostname[:port] format, e.g. sig.net:1234 (may be used multiple times to specify multiple seed nodes; defaults to the global default signet test network seed node(s))", ArgsManager::ALLOW_ANY | ArgsManager::DISALLOW_NEGATION, OptionsCategory::CHAINPARAMS);

}

static std::unique_ptr<CBaseChainParams> globalChainBaseParams;

const CBaseChainParams& BaseParams()

{

    assert(globalChainBaseParams);

    return *globalChainBaseParams;

}

std::string GetSignetDataDir(const ArgsManager& args)

{

    std::string base_data_dir = "signet";

    // no default to treat no -signetchallenge (default signet) as distinct from

    // the empty -signetchallenge= (custom signet)

    const auto challenge_hex = args.GetArg("-signetchallenge");

    if (!challenge_hex) {

        return base_data_dir;

    }

    // -signetchallenge can be invalid hex here (it's checked later in

    // ReadSigNetArgs), but we don't mind to keep validation in one place.

    const auto challenge_bytes = TryParseHex<uint8_t>(*challenge_hex);

    if (!challenge_bytes || *challenge_bytes == kernel::SIGNET_DEFAULT_CHALLENGE) {

        return base_data_dir;

    }

    return base_data_dir + "_" + HexStr(kernel::GetSignetMessageStart(*challenge_bytes));

}

/**

 * Port numbers for incoming Tor connections (8334, 18334, 38334, 48334, 18445) have

 * been chosen arbitrarily to keep ranges of used ports tight.

 */

std::unique_ptr<CBaseChainParams> CreateBaseChainParams(const ArgsManager& args, const ChainType chain)

{

    switch (chain) {

    case ChainType::MAIN:

        return std::make_unique<CBaseChainParams>("", 8332);

    case ChainType::TESTNET:

        return std::make_unique<CBaseChainParams>("testnet3", 18332);

    case ChainType::TESTNET4:

        return std::make_unique<CBaseChainParams>("testnet4", 48332);

    case ChainType::SIGNET:

        return std::make_unique<CBaseChainParams>(GetSignetDataDir(args), 38332);

    case ChainType::REGTEST:

        return std::make_unique<CBaseChainParams>("regtest", 18443);

    }

    assert(false);

}

void SelectBaseParams(const ChainType chain)

{

    gArgs.SelectConfigNetwork(ChainTypeToString(chain));

    globalChainBaseParams = CreateBaseChainParams(gArgs, chain);

}