#pragma once

#include <xrpl/basics/base_uint.h>
#include <xrpl/protocol/AccountID.h>

#include <concepts>
#include <cstdint>
#include <optional>
#include <string>
#include <string_view>
#include <tuple>
#include <utility>
#include <vector>

namespace data {

using Blob = std::vector<unsigned char>;

/**
 * @brief Represents an object in the ledger.
 */
struct LedgerObject {
    xrpl::uint256 key;
    Blob blob;

    bool
    operator==(LedgerObject const& other) const = default;
};

/**
 * @brief Represents a page of LedgerObjects.
 */
struct LedgerPage {
    std::vector<LedgerObject> objects;
    std::optional<xrpl::uint256> cursor;
};

/**
 * @brief Represents a page of book offer objects.
 */
struct BookOffersPage {
    std::vector<LedgerObject> offers;
    std::optional<xrpl::uint256> cursor;
};

/**
 * @brief Represents a transaction and its metadata bundled together.
 */
struct TransactionAndMetadata {
    Blob transaction;
    Blob metadata;
    std::uint32_t ledgerSequence = 0;
    std::uint32_t date = 0;

    TransactionAndMetadata() = default;

    /**
     * @brief Construct a new Transaction And Metadata object
     *
     * @param transaction The transaction
     * @param metadata The metadata
     * @param ledgerSequence The ledger sequence
     * @param date The date
     */
    TransactionAndMetadata(
        Blob transaction,
        Blob metadata,
        std::uint32_t ledgerSequence,
        std::uint32_t date
    )
        : transaction{std::move(transaction)}
        , metadata{std::move(metadata)}
        , ledgerSequence{ledgerSequence}
        , date{date}
    {
    }

    /**
     * @brief Construct a new Transaction And Metadata object
     *
     * @param data The data to construct from
     */
    TransactionAndMetadata(std::tuple<Blob, Blob, std::uint32_t, std::uint32_t> data)
        : transaction{std::get<0>(data)}
        , metadata{std::get<1>(data)}
        , ledgerSequence{std::get<2>(data)}
        , date{std::get<3>(data)}
    {
    }

    /**
     * @brief Check if the transaction and metadata are the same as another
     *
     * @param other The other transaction and metadata
     * @return true if they are the same; false otherwise
     */
    bool
    operator==(TransactionAndMetadata const& other) const
    {
        return transaction == other.transaction && metadata == other.metadata &&
            ledgerSequence == other.ledgerSequence && date == other.date;
    }
};

/**
 * @brief Represents a cursor into the transactions table.
 */
struct TransactionsCursor {
    std::uint32_t ledgerSequence = 0;
    std::uint32_t transactionIndex = 0;

    TransactionsCursor() = default;

    /**
     * @brief Construct a new Transactions Cursor object
     *
     * @param ledgerSequence The ledger sequence
     * @param transactionIndex The transaction index
     */
    TransactionsCursor(std::uint32_t ledgerSequence, std::uint32_t transactionIndex)
        : ledgerSequence{ledgerSequence}, transactionIndex{transactionIndex}
    {
    }

    /**
     * @brief Construct a new Transactions Cursor object
     *
     * @param data The data to construct from
     */
    TransactionsCursor(std::tuple<std::uint32_t, std::uint32_t> data)
        : ledgerSequence{std::get<0>(data)}, transactionIndex{std::get<1>(data)}
    {
    }

    bool
    operator==(TransactionsCursor const& other) const = default;

    /**
     * @brief Convert the cursor to a tuple of seq and index
     *
     * @return The cursor as a tuple
     */
    [[nodiscard]] std::tuple<std::uint32_t, std::uint32_t>
    asTuple() const
    {
        return std::make_tuple(ledgerSequence, transactionIndex);
    }
};

/**
 * @brief Represests a bundle of transactions with metadata and a cursor to the next page.
 */
struct TransactionsAndCursor {
    std::vector<TransactionAndMetadata> txns;
    std::optional<TransactionsCursor> cursor;
};

/**
 * @brief Represents a NFToken.
 */
struct NFT {
    xrpl::uint256 tokenID;
    std::uint32_t ledgerSequence{};
    xrpl::AccountID owner;
    Blob uri;
    bool isBurned{};

    NFT() = default;

    /**
     * @brief Construct a new NFT object
     *
     * @param tokenID The token ID
     * @param ledgerSequence The ledger sequence
     * @param owner The owner
     * @param uri The URI
     * @param isBurned Whether the token is burned
     */
    NFT(xrpl::uint256 const& tokenID,
        std::uint32_t ledgerSequence,
        xrpl::AccountID const& owner,
        Blob uri,
        bool isBurned)
        : tokenID{tokenID}
        , ledgerSequence{ledgerSequence}
        , owner{owner}
        , uri{std::move(uri)}
        , isBurned{isBurned}
    {
    }

    /**
     * @brief Construct a new NFT object
     *
     * @param tokenID The token ID
     * @param ledgerSequence The ledger sequence
     * @param owner The owner
     * @param isBurned Whether the token is burned
     */
    NFT(xrpl::uint256 const& tokenID,
        std::uint32_t ledgerSequence,
        xrpl::AccountID const& owner,
        bool isBurned)
        : NFT(tokenID, ledgerSequence, owner, {}, isBurned)
    {
    }

    /**
     * @brief Check if the NFT is the same as another
     *
     * Clearly two tokens are the same if they have the same ID, but this struct stores the state of
     * a given token at a given ledger sequence, so we also need to compare with ledgerSequence.
     *
     * @param other The other NFT
     * @return true if they are the same; false otherwise
     */
    bool
    operator==(NFT const& other) const
    {
        return tokenID == other.tokenID && ledgerSequence == other.ledgerSequence;
    }
};

/**
 * @brief Represents a bundle of NFTs with a cursor to the next page
 */
struct NFTsAndCursor {
    std::vector<NFT> nfts;
    std::optional<xrpl::uint256> cursor;
};

/**
 * @brief Represents an array of MPTokens
 */
struct MPTHoldersAndCursor {
    std::vector<Blob> mptokens;
    std::optional<xrpl::AccountID> cursor;
};

/**
 * @brief Stores a range of sequences as a min and max pair.
 */
struct LedgerRange {
    std::uint32_t minSequence = 0;
    std::uint32_t maxSequence = 0;

    bool
    operator==(LedgerRange const&) const = default;
};

/**
 * @brief Represents an amendment in the XRPL
 */
struct Amendment {
    std::string name;
    xrpl::uint256 feature;
    bool isSupportedByXRPL = false;
    bool isSupportedByClio = false;
    bool isRetired = false;

    /**
     * @brief Get the amendment Id from its name
     *
     * @param name The name of the amendment
     * @return The amendment Id as uint256
     */
    static xrpl::uint256
    getAmendmentId(std::string_view const name);

    /**
     * @brief Equality comparison operator
     * @param other The object to compare to
     * @return Whether the objects are equal
     */
    bool
    operator==(Amendment const& other) const
    {
        return name == other.name;
    }
};

/**
 * @brief A helper for amendment name to feature conversions
 */
struct AmendmentKey {
    std::string name;

    /**
     * @brief Construct a new AmendmentKey
     * @param val Anything convertible to a string
     */
    AmendmentKey(std::convertible_to<std::string> auto&& val)
        : name{std::forward<decltype(val)>(val)}
    {
    }

    /** @brief Conversion to string */
    operator std::string const&() const;

    /** @brief Conversion to string_view */
    operator std::string_view() const;

    /** @brief Conversion to uint256 */
    operator xrpl::uint256() const;

    /**
     * @brief Comparison operators
     * @param other The object to compare to
     * @return Whether the objects are equal, greater or less
     */
    auto
    operator<=>(AmendmentKey const& other) const = default;
};

constexpr xrpl::uint256 kFirstKey{
    "0000000000000000000000000000000000000000000000000000000000000000"
};
constexpr xrpl::uint256 kLastKey{
    "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
};
constexpr xrpl::uint256 kHi192{"0000000000000000000000000000000000000000000000001111111111111111"};

}  // namespace data