// Copyright (c) 2016-2018 The Bitcoin Core developers
// Copyright (c) 2021 The Bitcoin developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.

#if defined(HAVE_CONFIG_H)
#include <config/bitcoin-config.h>
#endif

#include <chainparams.h>
#include <chainparamsbase.h>
#include <consensus/consensus.h>
#include <logging.h>
#include <util/defer.h>
#include <util/strencodings.h>
#include <util/system.h>
#include <wallet/wallettool.h>

#include <cstdio>

const std::function<std::string(const char *)> G_TRANSLATION_FUN = nullptr;

static void SetupWalletToolArgs() {
    SetupChainParamsBaseOptions();

    gArgs.AddArg("-?", "This help message", ArgsManager::ALLOW_ANY,
                 OptionsCategory::OPTIONS);
    gArgs.AddArg("-datadir=<dir>", "Specify data directory",
                 ArgsManager::ALLOW_ANY, OptionsCategory::OPTIONS);
    gArgs.AddArg("-wallet=<wallet-name>", "Specify wallet name",
                 ArgsManager::ALLOW_ANY, OptionsCategory::OPTIONS);
    gArgs.AddArg("-debug=<category>",
                 "Output debugging information (default: 0).",
                 ArgsManager::ALLOW_ANY, OptionsCategory::DEBUG_TEST);
    gArgs.AddArg("-printtoconsole",
                 "Send trace/debug info to console (default: 1 when no -debug "
                 "is true, 0 otherwise.",
                 ArgsManager::ALLOW_ANY, OptionsCategory::DEBUG_TEST);

    gArgs.AddArg("info", "Get wallet info", ArgsManager::ALLOW_ANY,
                 OptionsCategory::COMMANDS);
    gArgs.AddArg("create", "Create new wallet file", ArgsManager::ALLOW_ANY,
                 OptionsCategory::COMMANDS);

    // Hidden
    gArgs.AddArg("-h", "", ArgsManager::ALLOW_ANY, OptionsCategory::HIDDEN);
    gArgs.AddArg("-help", "", ArgsManager::ALLOW_ANY, OptionsCategory::HIDDEN);
}

static bool WalletAppInit(int argc, char *argv[]) {
    SetupWalletToolArgs();
    std::string error_message;
    if (!gArgs.ParseParameters(argc, argv, error_message)) {
        std::fprintf(stderr, "Error parsing command line arguments: %s\n",
                     error_message.c_str());
        return false;
    }
    if (argc < 2 || HelpRequested(gArgs)) {
        std::string usage =
            strprintf("%s bitcoin-wallet version", PACKAGE_NAME) + " " +
                      FormatFullVersion() + "\n\n" +
                      "wallet-tool is an offline tool for creating and interacting with "
                      "Bitcoin Cash Node wallet files.\n" +
                      "By default wallet-tool will act on wallets in the default mainnet "
                      "wallet directory in the datadir.\n" +
                      "To change the target wallet, use the -datadir, -wallet and "
                      "-testnet/-regtest arguments.\n\n" +
                      "Usage:\n" + "  bitcoin-wallet [options] <command>\n\n" +
                      gArgs.GetHelpMessage();

        std::fprintf(stdout, "%s", usage.c_str());
        return false;
    }

    // check for printtoconsole, allow -debug
    LogInstance().m_print_to_console =
        gArgs.GetBoolArg("-printtoconsole", gArgs.GetBoolArg("-debug", false));

    if (!fs::is_directory(GetDataDir(false))) {
        std::fprintf(stderr,
                     "Error: Specified data directory \"%s\" does not exist.\n",
                     gArgs.GetArg("-datadir", "").c_str());
        return false;
    }
    // Check for -testnet or -regtest parameter (Params() calls are only valid
    // after this clause)
    SelectParams(gArgs.GetChainName());

    return true;
}

int main(int argc, char *argv[]) {
#ifdef WIN32
    util::WinCmdLineArgs winArgs;
    std::tie(argc, argv) = winArgs.get();
#endif
    SetupEnvironment();
    RandomInit();
    try {
        if (!WalletAppInit(argc, argv)) {
            return EXIT_FAILURE;
        }
    } catch (const std::exception &e) {
        PrintExceptionContinue(&e, "WalletAppInit()");
        return EXIT_FAILURE;
    } catch (...) {
        PrintExceptionContinue(nullptr, "WalletAppInit()");
        return EXIT_FAILURE;
    }

    std::string method{};
    for (int i = 1; i < argc; ++i) {
        if (!IsSwitchChar(argv[i][0])) {
            if (!method.empty()) {
                std::fprintf(stderr,
                             "Error: two methods provided (%s and %s). Only one "
                             "method should be provided.\n",
                             method.c_str(), argv[i]);
                return EXIT_FAILURE;
            }
            method = argv[i];
        }
    }

    if (method.empty()) {
        std::fprintf(stderr, "No method provided. Run `bitcoin-wallet -help` for "
                     "valid methods.\n");
        return EXIT_FAILURE;
    }

    // A name must be provided when creating a file
    if (method == "create" && !gArgs.IsArgSet("-wallet")) {
        std::fprintf(stderr, "Wallet name must be provided when creating a new wallet.\n");
        return EXIT_FAILURE;
    }

    std::string name = gArgs.GetArg("-wallet", "");

    ECCVerifyHandle globalVerifyHandle;
    ECC_Start();
    Defer eccStopper([&]{ ECC_Stop(); });
    if (!WalletTool::ExecuteWalletToolFunc(method, name)) {
        return EXIT_FAILURE;
    }
    return EXIT_SUCCESS;
}
