/*
 * Copyright (C) 2017-present ScyllaDB
 */

/*
 * SPDX-License-Identifier: LicenseRef-ScyllaDB-Source-Available-1.0
 */

#pragma once

#include <type_traits>
#include <seastar/core/sstring.hh>
#include <seastar/core/enum.hh>

namespace sstables {

enum class sstable_version_types { ka, la, mc, md, me, ms };
enum class sstable_format_types { big };

constexpr std::array<sstable_version_types, 6> all_sstable_versions = {
    sstable_version_types::ka,
    sstable_version_types::la,
    sstable_version_types::mc,
    sstable_version_types::md,
    sstable_version_types::me,
    sstable_version_types::ms,
};

constexpr std::array<sstable_version_types, 4> writable_sstable_versions = {
    sstable_version_types::mc,
    sstable_version_types::md,
    sstable_version_types::me,
    sstable_version_types::ms,
};

constexpr sstable_version_types oldest_writable_sstable_format = sstable_version_types::mc;

inline auto get_highest_sstable_version() {
    return all_sstable_versions[all_sstable_versions.size() - 1];
}

sstable_version_types version_from_string(std::string_view s);
sstable_format_types format_from_string(std::string_view s);

bool has_summary_and_index(sstable_version_types v);

extern const std::unordered_map<sstable_version_types, seastar::sstring, seastar::enum_hash<sstable_version_types>> version_string;
extern const std::unordered_map<sstable_format_types, seastar::sstring, seastar::enum_hash<sstable_format_types>> format_string;

}

template <>
struct fmt::formatter<sstables::sstable_version_types> : fmt::formatter<string_view> {
    template <typename FormatContext>
    auto format(const sstables::sstable_version_types& version, FormatContext& ctx) const {
        return fmt::format_to(ctx.out(), "{}", sstables::version_string.at(version));
    }
};

template <>
struct fmt::formatter<sstables::sstable_format_types> : fmt::formatter<string_view> {
    template <typename FormatContext>
    auto format(const sstables::sstable_format_types& format, FormatContext& ctx) const {
        return fmt::format_to(ctx.out(), "{}", sstables::format_string.at(format));
    }
};
