#include <xrpl/protocol/STValidation.h>

#include <xrpl/basics/Blob.h>
#include <xrpl/basics/Log.h>
#include <xrpl/basics/Slice.h>
#include <xrpl/basics/base_uint.h>
#include <xrpl/basics/chrono.h>
#include <xrpl/beast/utility/instrumentation.h>
#include <xrpl/protocol/HashPrefix.h>
#include <xrpl/protocol/KeyType.h>  // IWYU pragma: keep
#include <xrpl/protocol/PublicKey.h>
#include <xrpl/protocol/SField.h>
#include <xrpl/protocol/SOTemplate.h>
#include <xrpl/protocol/STBase.h>
#include <xrpl/protocol/STObject.h>
#include <xrpl/protocol/Serializer.h>

#include <cstddef>
#include <exception>
#include <utility>

namespace xrpl {

STBase*
STValidation::copy(std::size_t n, void* buf) const
{
    return emplace(n, buf, *this);
}

STBase*
STValidation::move(std::size_t n, void* buf)
{
    return emplace(n, buf, std::move(*this));
}

SOTemplate const&
STValidation::validationFormat()
{
    // We can't have this be a magic static at namespace scope because
    // it relies on the SField's below being initialized, and we can't
    // guarantee the initialization order.
    // clang-format off
    static SOTemplate const kFormat{
        {sfFlags,               SoeRequired},
        {sfLedgerHash,          SoeRequired},
        {sfLedgerSequence,      SoeRequired},
        {sfCloseTime,           SoeOptional},
        {sfLoadFee,             SoeOptional},
        {sfAmendments,          SoeOptional},
        {sfBaseFee,             SoeOptional},
        {sfReserveBase,         SoeOptional},
        {sfReserveIncrement,    SoeOptional},
        {sfSigningTime,         SoeRequired},
        {sfSigningPubKey,       SoeRequired},
        {sfSignature,           SoeRequired},
        {sfConsensusHash,       SoeOptional},
        {sfCookie,              SoeDefault},
        {sfValidatedHash,       SoeOptional},
        {sfServerVersion,       SoeOptional},
        // featureXRPFees
        {sfBaseFeeDrops,          SoeOptional},
        {sfReserveBaseDrops,      SoeOptional},
        {sfReserveIncrementDrops, SoeOptional},
        // featureSmartEscrow
        {sfGasLimit,               SoeOptional},
        {sfBytecodeSizeLimit,      SoeOptional},
        {sfGasPrice,               SoeOptional},
    };
    // clang-format on

    return kFormat;
};

uint256
STValidation::getSigningHash() const
{
    return STObject::getSigningHash(HashPrefix::Validation);
}

uint256
STValidation::getLedgerHash() const
{
    return getFieldH256(sfLedgerHash);
}

uint256
STValidation::getConsensusHash() const
{
    return getFieldH256(sfConsensusHash);
}

NetClock::time_point
STValidation::getSignTime() const
{
    return NetClock::time_point{NetClock::duration{getFieldU32(sfSigningTime)}};
}

NetClock::time_point
STValidation::getSeenTime() const noexcept
{
    return seenTime_;
}

bool
STValidation::isValid() const noexcept
{
    if (!valid_)
    {
        XRPL_ASSERT(
            publicKeyType(getSignerPublic()) == KeyType::Secp256k1,
            "xrpl::STValidation::isValid : valid key type");

        // Log that the signature was never checked, so an operator does not
        // read this as a bad key. The log is guarded because it can throw too.
        auto reportUncheckable = [this](char const* reason) noexcept {
            try
            {
                JLOG(debugLog().error())
                    << "Cannot check the signature of the validation for ledger " << getLedgerHash()
                    << ": " << reason;
            }
            catch (...)  // NOLINT(bugprone-empty-catch)
            {
                // Nothing can be reported when reporting is what failed.
            }
        };

        // The signing hash re-serializes the fields, which can fail. This
        // function is noexcept, so report the validation as invalid instead of
        // throwing. valid_ stays unset, so a later call checks again.
        try
        {
            valid_ = verifyDigest(
                getSignerPublic(),
                getSigningHash(),
                makeSlice(getFieldVL(sfSignature)),
                (getFlags() & kVfFullyCanonicalSig) != 0u);
        }
        catch (std::exception const& e)
        {
            reportUncheckable(e.what());
            return false;
        }
        catch (...)
        {
            reportUncheckable("unknown exception");
            return false;
        }
    }

    return valid_.value();
}

bool
STValidation::isFull() const noexcept
{
    return (getFlags() & kVfFullValidation) != 0;
}

Blob
STValidation::getSignature() const
{
    return getFieldVL(sfSignature);
}

Blob
STValidation::getSerialized() const
{
    Serializer s;
    add(s);
    return s.peekData();
}

}  // namespace xrpl