// Copyright (c) 2017-2019 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.

#ifndef BITCOIN_WALLET_WALLETUTIL_H
#define BITCOIN_WALLET_WALLETUTIL_H

#include <fs.h>

#include <vector>

/** (client) version numbers for particular wallet features */
enum WalletFeature
{
    FEATURE_BASE = 10500, // the earliest version new wallets supports (only useful for getwalletinfo's clientversion output)

    FEATURE_WALLETCRYPT = 40000, // wallet encryption
    FEATURE_COMPRPUBKEY = 60000, // compressed public keys

    FEATURE_HD = 130000, // Hierarchical key derivation after BIP32 (HD Wallet)

    FEATURE_HD_SPLIT = 139900, // Wallet with HD chain split (change outputs will use m/0'/1'/k)

    FEATURE_NO_DEFAULT_KEY = 159900, // Wallet without a default key written

    FEATURE_PRE_SPLIT_KEYPOOL = 169900, // Upgraded to HD SPLIT and can have a pre-split keypool

    FEATURE_LATEST = FEATURE_PRE_SPLIT_KEYPOOL
};



enum WalletFlags : uint64_t {
    // wallet flags in the upper section (> 1 << 31) will lead to not opening the wallet if flag is unknown
    // unknown wallet flags in the lower section <= (1 << 31) will be tolerated

    // will categorize coins as clean (not reused) and dirty (reused), and handle
    // them with privacy considerations in mind
    WALLET_FLAG_AVOID_REUSE = (1ULL << 0),

    // Indicates that the metadata has already been upgraded to contain key origins
    WALLET_FLAG_KEY_ORIGIN_METADATA = (1ULL << 1),

    // will enforce the rule that the wallet can't contain any private keys (only watch-only/pubkeys)
    WALLET_FLAG_DISABLE_PRIVATE_KEYS = (1ULL << 32),

    //! Flag set when a wallet contains no HD seed and no private keys, scripts,
    //! addresses, and other watch only things, and is therefore "blank."
    //!
    //! The only function this flag serves is to distinguish a blank wallet from
    //! a newly created wallet when the wallet database is loaded, to avoid
    //! initialization that should only happen on first run.
    //!
    //! This flag is also a mandatory flag to prevent previous versions of
    //! bitcoin from opening the wallet, thinking it was newly created, and
    //! then improperly reinitializing it.
    WALLET_FLAG_BLANK_WALLET = (1ULL << 33),
};

//! Get the path of the wallet directory.
fs::path GetWalletDir();

//! Get wallets in wallet directory.
std::vector<fs::path> ListWalletDir();

//! The WalletLocation class provides wallet information.
class WalletLocation final
{
    std::string m_name;
    fs::path m_path;

public:
    explicit WalletLocation() {}
    explicit WalletLocation(const std::string& name);

    //! Get wallet name.
    const std::string& GetName() const { return m_name; }

    //! Get wallet absolute path.
    const fs::path& GetPath() const { return m_path; }

    //! Return whether the wallet exists.
    bool Exists() const;
};

#endif // BITCOIN_WALLET_WALLETUTIL_H