#pragma once

#include <xrpl/protocol/Indexes.h>
#include <xrpl/protocol/STObject.h>

namespace xrpl {

class Rules;
namespace test {
class Invariants_test;
}

class STLedgerEntry final : public STObject, public CountedObject<STLedgerEntry>
{
    uint256 key_;
    LedgerEntryType type_;

public:
    using pointer = std::shared_ptr<STLedgerEntry>;
    using ref = std::shared_ptr<STLedgerEntry> const&;
    using const_pointer = std::shared_ptr<STLedgerEntry const>;
    using const_ref = std::shared_ptr<STLedgerEntry const> const&;

    /** Create an empty object with the given key and type. */
    explicit STLedgerEntry(Keylet const& k);
    STLedgerEntry(LedgerEntryType type, uint256 const& key);
    STLedgerEntry(SerialIter& sit, uint256 const& index);
    STLedgerEntry(SerialIter&& sit, uint256 const& index);
    STLedgerEntry(STObject const& object, uint256 const& index);

    SerializedTypeID
    getSType() const override;

    std::string
    getFullText() const override;

    std::string
    getText() const override;

    Json::Value
    getJson(JsonOptions options = JsonOptions::none) const override;

    /** Returns the 'key' (or 'index') of this item.
        The key identifies this entry's position in
        the SHAMap associative container.
    */
    uint256 const&
    key() const;

    LedgerEntryType
    getType() const;

    // is this a ledger entry that can be threaded
    bool
    isThreadedType(Rules const& rules) const;

    bool
    thread(
        uint256 const& txID,
        std::uint32_t ledgerSeq,
        uint256& prevTxID,
        std::uint32_t& prevLedgerID);

private:
    /*  Make STObject comply with the template for this SLE type
        Can throw
    */
    void
    setSLEType();

    friend test::Invariants_test;  // this test wants access to the private
                                   // type_

    STBase*
    copy(std::size_t n, void* buf) const override;
    STBase*
    move(std::size_t n, void* buf) override;

    friend class detail::STVar;
};

using SLE = STLedgerEntry;

inline STLedgerEntry::STLedgerEntry(LedgerEntryType type, uint256 const& key)
    : STLedgerEntry(Keylet(type, key))
{
}

inline STLedgerEntry::STLedgerEntry(SerialIter&& sit, uint256 const& index)
    : STLedgerEntry(sit, index)
{
}

/** Returns the 'key' (or 'index') of this item.
    The key identifies this entry's position in
    the SHAMap associative container.
*/
inline uint256 const&
STLedgerEntry::key() const
{
    return key_;
}

inline LedgerEntryType
STLedgerEntry::getType() const
{
    return type_;
}

}  // namespace xrpl
